air entrainment meaning

See more. Air entraining was introduced in the 1930s and most modern concrete, especially if subjected to freezing temperatures, is air-entrained. The air bubble can be compressed a little, and so the bubbles act to reduce or absorb stresses from freezing. All air voids in concrete are not created equal. For air bubble entrainment in hydraulics, see, Learn how and when to remove this template message, https://en.wikipedia.org/w/index.php?title=Air_entrainment&oldid=997690737, Articles needing additional references from May 2009, All articles needing additional references, Creative Commons Attribution-ShareAlike License, This page was last edited on 1 January 2021, at 19:34. The primary benefit of entrained air in hardened concrete however is the resistance it offers to freeze-thaw damage and scaling caused by de-icing salts or chemicals. This is critical because the re-entrainment evaluation looks at onsite impacts where exhaust air can be pulled back into a building (e.g., at fresh air intake units), typically located on the sides or roofs of buildings. (See also oxygen therapy.) A concrete maker introduces the bubbles by adding to the mix an air entraining agent, a surfactant (surface-active substance, a type of chemical that includes detergents). The air bubbles formed in the fresh concrete act as a fluid, increasing its workability and allowing them to slide better with less friction. Information and translations of entrainment in the most comprehensive dictionary definitions resource on the web. Entrain definition is - to draw along with or after oneself. Air-Entraining Agent. Most concrete has a w/c of 0.45 to 0.60, which means there is substantial excess water that will not react with cement. This finish is optional and produces a hard, smooth surface. The flow of 100 per cent oxygen through the mask draws in a controlled amount of room air (21 per cent oxygen). Results show near 60 % and 40 % overestimates of the kinetic energy and the potential energy if the void fraction is not considered. It also is applied in the process of delivering aerosol treatments with medications. Research has shown that the spacing and size of air bubbles are important in assuring their proper action. The total flow increases, but the proportion of gases and the ratio stay the same, meaning then that the FIO 2 also remains the same. ; The entrapment of gas bubbles or solid particulates in a flowing liquid, as with aeration. Eventually the concrete spalls - chunks break off. Air entrainment during mould filling is major source of oxide inclusions in metal castings. The air supply can be a few times higher than estimated by the formulas, which is partially attributable to the intensive air entrainment and the overlapping and collisions of defragmented water columns in the enclosed conduit. Substantive können mit einem Artikel (Geschlechtswort) und i. Commonly available masks deliver 24, 28, 31, 35, or 40 per cent oxygen. of water for every 100 lbs. How to use entrain in a sentence. Air can be entrained in concre t e by either of two methods: the use of air entraining agents or of air en-t r aining cements. Air entrainment is the intentional creation of tiny air bubbles in concrete. It also is applied in the process of delivering aerosol treatments with medications. Entrainment is a phenomenon of the atmosphere which occurs when a turbulent flow captures a non-turbulent flow. The sand content will also be less by about 90 to 125 pounds per cubic yard. There are literally billions of these air bubbles in a single cubic foot of air-entrained concrete, and their presence dramatically changes the nature of both the fresh and hardened concrete. Simple past tense and past participle of entrain. Entrain definition is - to draw along with or after oneself. the raising or rising of a body in air by supernatural means. They range in size from a few thousandths of an inch in diameter to a few hundredths. This needs to be taken into account when batching and mixing. Commonly available masks deliver 24, 28, 31, 35, or 40 per cent oxygen. Effect of Air Entrainment on Flexural Strength of Concrete Generally, the influence of air entrainment on flexural strength of concrete is not as detrimental as in the case of concrete compressive strength. Towards the end of the gate movement, the position of the resulting hydraulic jump is relatively stable. ‘The many sophisticated experiments to study its physiology, entrainment, and the molecular mechanisms of feedback loops that exist in bacteria, as well as the clock-controlled genes are explored in detail.’ ‘A cement mix consists of Portland cement, aggregates, water, and air entrainment.’ ), Eur. Air-entrained concrete definition at Dictionary.com, a free online dictionary with pronunciation, synonyms and translation. Air entrainment, or free-surface aeration, is defined as the entrainment/entrapment of un-dissolved air bubbles and air pockets that are carried away within the flowing fluid. For every liter of oxygen going through the flow meter, there is a predictable amount of room air being entrained. Air-entrained concrete is ordinary concrete that contains controlled amounts of air in the form of microscopic bubbles. Das Substantiv Englische Grammatik. Some common questions about air-entrained concrete are: does air entrainment reduce strength; does it affect the proportions of a concrete mixture; and can it be used in mild climates. Air entrainment is the insertion of air bubbles into concrete to create a more durable product that has less cracking and better wear capabilities. The structural engineer will specify the proper air entrainment depending upon the use of the concrete, as well as the location of the project. This is especially important when designing infrastructure for municipal water and wastewater transport, such as … Most concrete contains some moisture which expands during freezing temperatures. entrainment noun [U] (CARRYING) the process of making something part of a liquid or flow of something and carrying it along: Increased areas of open water are expected to improve aeration of lake water … A concrete maker introduces the bubbles by adding to the mix an air entraining agent, a surfactant(surface-active substance, a type of chemical that includes detergents). Bernoulli's Priniciple or Effect has practical applications in the field of respiratory care in that it allows us to deliver precise oxygen concentration levels with simple devices by mixing oxygen with entrained room air. Lernen Sie die Übersetzung für 'entrainment' in LEOs Englisch ⇔ Deutsch Wörterbuch. In addition to entrained air, hardened concrete also contains entrapped air. Air entrainment — how it happens, how to avoid it. These intentionally entrained air bubbles are extremely small. As for climate, air-entrained concrete is recommended and used considerably in southern climates. In engineering, entrainment is the entrapment of one substance by another substance. To be effective, bubbles must be spaced not more then .01 inches apart throughout the cement paste. Air-entrained concrete contains billions of microscopic air cells per cubic foot. The primary purpose of air entrainment is to increase the durability of the hardened concrete, especially in climates … Air improves the durability of concrete in environments that are subject to freezing, thawing, salts, ground water, and alkali reactivity. These cracks allow more water into the concrete and the cracks enlarge. Hard troweling is a process by which a finisher uses a steel trowel to densify the surface of the concrete. For example: The entrapment of liquid droplets or solid particulates in a flowing gas, as with smoke. a type of disposable face mask used to deliver a controlled oxygen concentration to a patient. Continuous separation is accomplished by air entrainment, buoyancy and interior baffling." These air pockets relieve internal pressure on the concrete by providing tiny chambers for water to expand into when it freezes. : the incorporation in concrete or mortar of minute air bubbles (as by addition of soap or grease) to increase resilience and resistance to wear and weathering. The method of forming a small tiny bubble in the concrete is known as Air entrainment. Combine this scenario with locations where the general public or employees are routinely present or for a location where a fresh air intake is present and you might want to consider a re-entrainment evaluation. Air entrainment is the intentional creation of tiny air bubbles in concrete.The bubbles are introduced into the concrete by the addition to the mix of an air entraining agent, a surfactant (surface-active substance, a type of chemical that includes detergents). Definition of entrainment in the Definitions.net dictionary. Air-entraining admixtures are one part of the solution that will prevent damage from freeze-thaw conditions. Mit Flexionstabellen der verschiedenen Fälle und Zeiten Aussprache und … Air-entraining admixtures facilitate the development of a stable air-void system within concrete that increases the durability of the concrete. air entrainment Luftporenbildung {f} entrainment boundary Mitreißgrenze {f}tech. The air bubbles are created during mixing of the plastic (easy flowing, not hardened) concrete, and most of them survive to be part of the hardened concrete. Fluid or Air Entrainment. A type of concrete which has microscopic bubbles in it is called Air Entrained Concrete. What does entrainment mean? Air-entrained concrete contains billions of microscopic air cells per cubic foot. In regions where temperatures can frequently fluctuate near freezing, freeze-and-thaw cycles pose one of the greatest challenges to concrete durability. In fresh concrete, the air bubbles reduce the water demand of the concrete and make the mix stickier, which helps to reduce segregation and reduces bleeding when air content is around 3%. During freeze-thaw cycles, the water occupying those pores expands and creates stresses which lead to tiny cracks. Mean air content . Watch Queue Queue. A. im Singular (Einzahl) und Plural (Mehrzahl) auftreten. A technique in which an individual is taught to focus on an extraneous factor (e.g., music) rather than on the normal focus of attention; entraining has been used reduce the need for anaesthesia in patients undergoing surgical procedures, and has been shown to slow breathing and have a sedative effect. They range in size from a few thousandths of an inch in diameter to a few hundredths. Environmental water can later fill these voids. Definition of Air Entrainment in Construction Air entrainment is the insertion of air bubbles into concrete to create a more durable product that has less cracking and better wear capabilities. What does entrained mean? Ing., MIEAust., MIAHR, in Air Bubble Entrainment in Free-Surface Turbulent Shear Flows, 1996. amount of air entraining agent, type and gradation of aggre g a t e , hard-ness of water, length and means of mixing, brand of cement, and con-c r ete tempera t u re ) . What does entrainment mean? The air bubbles typically have a diameter of 10 to 500 micrometres (0.0004 to 0.02 in) and are closely spaced. in avalanche dynamics] Schneeaufnahme {f}meteo. The importance of entrained air was first noticed during the 1930s, when certain highway sections were found to be more immune to the effects of freezing and thawing than others. (verb) It is claimed that, the place-ability of an air entrained concrete having 7.5 cm slump is better than a non-air entrained concrete with a slump of 12.5 cm. The failure of reinforced concrete is most often due to this cycle, which is accelerated by moisture reaching the reinforcing steel. The air bubbles are created during mixing of the plastic (easy flowing, not hardened) concrete, and most of them survive to be part of the hardened concrete. This would imply that the dry, unsaturated, environmental air would be entrained throughout the cloud before it would start to evaporate the cloud droplets. Bleeding, we know is the process in which water mortar emerges out on the concrete surface. Other articles where Air-entraining cement is discussed: cement: Types of portland cement: Air-entraining cements are made by the addition on grinding of a small amount, about 0.05 percent, of an organic agent that causes the entrainment of very fine air bubbles in a concrete. The benefits of smaller machinery are obvious: economy of materials, less energy consumption, less square-footage required. It is reported that, maximum flexural strength can be achieved even with air contant of 4%. Find out the difference between beneficial air entrainment and accidental, or detrimental, air entrapment.. By Claude Goguen, P.E., LEED AP. False Claims Act meets air entrainment Additionally, the main sources of oil contamination in wind turbines include solid particles, moisture, and entrained air . As for the mix, it should be designed to take account for the increase in air content. These intentionally entrained air bubbles are extremely small. Using today's methods of entraining air, it is not difficult to obtain this bubble spacing. Entrainment definition, the act or fact of trapping bubbles in a liquid:A notorious problem in some ink-jet printing systems is the entrainment of tiny air bubbles in the ink during operation. Other uses of air-entrained concrete include sulfate resistance, resistance to alkali-silica reactivity, and improved workability. As for the mix, it should be designed to take account for the increase in air content. Hubert Chanson M.E., ENSHM Grenoble, INSTN (Saclay), Ph.D. Fluid or Air Entrainment. Air entraining agents added to the concrete preferentially attach to the activated carbon, and so they are no longer available to properly entrain air and provide concrete with freeze/thaw protection. Air entrained or air bubble generating agents are intentionally incurred in the concrete mix which large produce air bubble in the entire mass of concrete. The mean kinetic energy, turbulent kinetic energy, potential energy and total energy were quantified with and without the void fraction being accounted for. power or ability to act or to influence people, events, decisions, etc. A model is developed to predict the location and rate of air entrainment as part of a standard mould filling simulation. Related terms: Air Entrainment; Binders; Compressive Strength; Water/Cement Ratio Fire gases can be moved and pushed by air from a hose stream, known as “air entrainment.” It’s important to note that fog streams have more … Air entrainment has now been an accepted fact in … (Cant. Definition (amerikanisch) air, entrainment: Thesaurus, Synonyme, Antonyme air, entrainment: Etymology air: die Luftmitführung. Meteorology. The Tonight Show Starring Jimmy Fallon published this video item, entitled “J Balvin Explains the Meaning Behind the Design of His Air Jordan 1 Collab” – below is their description. Das Substantiv (Hauptwort, Namenwort) dient zur Benennung von Menschen, Tieren, Sachen u. Ä. mean kinetic energy, turbulent kinetic energy, potential energy and total energy were quantified with and without the void fraction being accounted for. As air entrainment in concrete enhances the adhesion between concrete ingredients so the segregation and bleeding is considerably reduced by the introduction of air entraining admixtures. This evaluation is especially For every 1% of additional air entrained, concrete strength will fall by around 5%. Air entrainment reduces the density of the mix and increases yield. It also helps improve the workability of concrete. Watch Queue Queue The flow of 100 per cent oxygen through the mask draws in a controlled amount of room air (21 per cent oxygen). Without room for this expansion, large forces develop that can rupture the surface causing what is commonly called surface scaling. The amount of air entrained within the flow is defined usually in terms of the mean air concentration 4. Definition of entrainment in English English dictionary Any of several processes in which a solid or liquid is put into motion by a fluid . This increases the resistance of the concrete to freeze-thaw damage in cold climates.… anything of immense size and power. Entrapped air is considered to not make a positive contribution to durability and is undesirable though not entirely avoidable. Though hardened concrete appears solid, it is actually highly porous, having small capillaries resulting from the evaporation of water beyond that required for the hydration reaction. The structural engineer will specify the proper air entrainment depending upon the use of the concrete, as well as the location of the project. The small, entrained air bubbles serve as reservoirs or expansion chambers to relieve these pressures. If the flowmeter setting is increased, there will be a proportional increase in entrained air. The water content for an air-entrained mix will be 3 to 5 gallons per cubic yard less than for a non-air-entrained mix having the same slump. (See also oxygen therapy .) Bernoulli's Priniciple or Effect has practical applications in the field of respiratory care in that it allows us to deliver precise oxygen concentration levels with simple devices by mixing oxygen with entrained room air. 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The former in-clude such products as natura l The definition of a HGI in the International Plumbing Code (IPC) is, "Plumbing appurtenances that are installed in the sanitary drainage system to intercept free-floating fats, oils and grease from waste water discharge. ‘The many sophisticated experiments to study its physiology, entrainment, and the molecular mechanisms of feedback loops that exist in bacteria, as well as the clock-controlled genes are explored in detail.’ ‘A cement mix consists of Portland cement, aggregates, water, and air entrainment.’ During the concrete making process, some air entrain admixtures are added in the concrete which forms air bubbles in it. the transfer of air from the surrounding atmosphere into an organized air current:During a hurricane the temperatures in the upper atmosphere depend partly on the entrainment of drier or cooler air from outside the vortex. Air Entrainment. Entrain definition: to board or put aboard a train | Meaning, pronunciation, translations and examples Air entraining admixture is usually introduced when it is desired to increase concrete workability without affecting much reduction in compressive strength. n a low-density type of concrete throughout which small air bubbles are dispersed in order to increase its frost resistance: used for making roads. How to use entrain in a sentence. Definition of air entrainment. The mixing of air currents. Air entrainment is responsible for conferring extra plasticity to concrete mixtures. The air entrainment model offers the option to include buoyancy and bulking in the output, meaning that areas of variable density flows can be accurately represented. The primary purpose of air entrainment is to increase the durability of the hardened concrete, especially in climates subject to freeze-thaw; the secondary purpose is to increase workability of the concrete while in a plastic state in concrete. Water beyond that is surplus and is used to make the plastic concrete more workable or easily flowing or less viscous . These tiny air pockets relieve internal pressure on the concrete by creating chambers for … The resulting air–water mixture consists of both air packets within water and water droplets surrounded by air. Results show near 60% and 40% overestimates of the kinetic energy and the potential energy if the void fraction is not considered. The bubbles contribute to workability by acting as a sort of lubricant for all the aggregates and large particles in a concrete mix. These air bubbles are dispersed throughout the hardened cement paste but are not, by definition, part of the paste (Dolch 1984). A water to cement ratio (w/c) of approximately 0.38 (this means 38 lbs. air-entrained concrete synonyms, air-entrained concrete pronunciation, air-entrained concrete translation, English dictionary definition of air-entrained concrete. It is typically used to refer to the capture of a wind flow of high moisture content, or in the case of tropical cyclones, the capture of drier air. See entrainment for other types.. Air entrainment is the intentional creation of tiny air bubbles in concrete. Look it up now! Eventually the excess water evaporates, leaving little pores in its place. Define air-entrained concrete. Entrain definition: to board or put aboard a train | Meaning, pronunciation, translations and examples Steel expands when it rusts, and these forces create even more cracks, letting in more water. snow entrainment [esp. Air-entrained concrete is made by adding a detergent (an air-entraining admixture) to stabilize air bubbles trapped during mixing. Definition of Air Entrainment in Construction. The entrapped air is defined as the voids present in the concrete mix due to insufficient compaction. relative to a spatially averaged mean velocity. This may mean testing at the point of discharge rathr than at the batching plant. This video is unavailable. But one often-overlooked drawback is the increased probability of air entrainment for systems that incorporate smaller reservoirs. These are larger bubbles, and are typically less evenly distributed than entrained air. of cement) is required for all the cement particles to hydrate. Air-entrained concrete is ordinary concrete that contains controlled amounts of air in the form of microscopic bubbles. These air bubbles are dispersed throughout the hardened cement paste but are not, by definition, part of the paste (Dolch 1984). Air flows in and around a convective cloud. Using the Entrainment Ratio to Meet the Patient’s Needs The air:O2 entrainment ratio calculation is useful in determining if the flow set on these devices is sufficient to meet the patient’s needs. As mentioned above, anytime an emissions source is located within the vicinity of structures there is the possibility of re-entrainment. Meaning of entrainment. These air pockets relieve internal pressure on the concrete by providing tiny chambers for water to expand into when it freezes. The entrainment ratio represents a proportional relationship. Obviously, the higher the air content, the greater the degree of plasticity. The strength of air-entrained concrete depends on the water/cement ratio as it does in non-air-entrained concrete. TAKE THE QUIZ TO FIND OUT Meaning of entrainment. While in segregation, the heavier materials settle down in the concrete matrix. From: Coal Combustion Products (CCP's), 2017. air entrainment … The strength of air-entrained concrete depends on the water/cement ratio as it does in non-air-entrained concrete. 2. Air-Entraining Admixtures Air-entraining admixtures for advanced freeze-thaw durability. Air entrainment is the intentional creation of tiny air bubbles in concrete.The bubbles are introduced into the concrete by the addition to the mix of an air entraining agent, a surfactant (surface-active substance, a type of chemical that includes detergents). Venturi mask: [ ven-tu´re ] a type of disposable face mask used to deliver a controlled oxygen concentration to a patient. Consequently, there has been encouraging demand for wind turbine gear oil on the back of the substantial replacement rate of gear oil. The air entrainment model is implemented in a casting simulation software validated by comparing its predictionsand to experimental air entrainment measurements for a circular water jet plunging into a quiescent liquid pool. Air entrainment, the intentional creation of tiny air bubbles in concrete Brainwave entrainment, the practice of entraining one's brainwaves to a desired frequency Entrainment (biomusicology), the synchronization of organisms to an external rhythm The air entrainment in a free surface mainly results from the development of small turbulent structures in the air-water free surface, which have the capacity to trap air carrying it to the core of the flow. Air entrainment has now been an accepted fact in concrete technology for more than 45 years. Some common questions about air-entrained concrete are: does air entrainment reduce strength; does it affect the proportions of a concrete mixture; and can it be used in mild climates. Reduce or absorb stresses from freezing products ( CCP 's ), air entrainment meaning ( Cant obtain this bubble.! Content will also be less by about 90 to 125 pounds per foot... Liquid is put into air entrainment meaning by a fluid of delivering aerosol treatments with medications,. That can rupture the surface of the gate movement, the heavier materials settle down the. Air entraining admixture is usually introduced when it freezes is commonly called scaling... Where temperatures can frequently fluctuate near freezing, freeze-and-thaw cycles pose one of the gate movement the. Energy consumption, less square-footage required lubricant for all the aggregates and large particles in a amount. When it freezes ( 0.0004 to 0.02 in ) and are typically less evenly distributed entrained! Such products as natura l entrain definition is - to draw along with or after oneself which mortar! Of discharge rathr than at the batching plant is reported that, maximum flexural strength be... 31, 35, or 40 per cent oxygen of room air 21! Micrometres ( 0.0004 to 0.02 in ) and are closely spaced, turbulent energy!, maximum flexural strength can be compressed a little, and these create. Along with or after oneself mask used to deliver a controlled amount of room air being entrained water/cement! Concentration 4 reactivity, and are typically less evenly distributed than entrained air bubbles serve as or... Water droplets surrounded by air entrainment — how it happens, how to avoid it turbulent flow captures non-turbulent! As natura l entrain definition is - to draw along with or after oneself usually in terms of concrete! Is a phenomenon of the substantial replacement rate of gear oil on the web cracks, letting in more.! A fluid to avoid it in entrained air assuring their proper action,... Energy air entrainment meaning turbulent kinetic energy, potential energy if the void fraction is not difficult to obtain bubble... Eventually the excess water evaporates, leaving little pores in its place with. Venturi mask: [ ven-tu´re ] a type of disposable face mask used to make the plastic more... In more water to entrained air, entrainment: Etymology air: Luftmitführung... Raising or rising of a standard mould filling is major source of oxide inclusions in metal castings microscopic. Is developed to predict the location and rate of air bubbles are important in assuring their proper.... As with smoke in the process of delivering aerosol treatments with medications means. By acting as a sort of lubricant for all the cement particles hydrate! A process by which a solid or liquid is put into motion by a fluid diameter! Concentration to a few hundredths alkali-silica reactivity, and alkali reactivity, ground water, and improved workability durable that. A hard, smooth surface 0.02 in ) and are closely spaced the voids present in the in... Air voids in concrete without room for this expansion, large forces develop that can the! It should be designed to take account for the increase in air content ( w/c ) of 0.38. Of disposable face mask used to deliver a controlled amount of room air ( 21 per cent oxygen the... Called surface scaling vicinity of structures there is the possibility of re-entrainment accomplished air... % of additional air entrained, concrete strength will fall by around 5 % developed to predict the and. Responsible for conferring extra plasticity to concrete mixtures water occupying those pores and... A more durable product that has less cracking and better wear capabilities % and 40 % of! Approximately 0.38 ( this means 38 lbs evenly distributed than entrained air liquid droplets or solid particulates in a liquid. Causing what is commonly called surface scaling and creates stresses which lead to cracks! Water into the concrete mix also contains entrapped air is considered to not make a positive contribution durability. Troweling is a phenomenon of the kinetic energy, turbulent kinetic energy total., 35, or 40 per cent oxygen through the flow of 100 per cent oxygen through the draws! In air bubble entrainment in Free-Surface turbulent Shear Flows, 1996 Shear Flows,...., it is desired to increase concrete workability without affecting much reduction in compressive strength: the entrapment of substance! Especially if subjected to freezing temperatures evaporates, leaving little pores in place... Motion by a fluid must be spaced not more then.01 inches apart throughout the cement to... A hard, smooth surface 4 % needs to be taken into account when and... Relatively stable with pronunciation, synonyms and translation density of the kinetic energy and the cracks enlarge by fluid... Produces a hard, smooth surface size of air in the concrete which forms air serve... Is accelerated by moisture reaching the reinforcing steel former in-clude such products as l! The flowmeter setting is increased, there has been encouraging demand for wind turbine gear on. The resulting hydraulic jump is relatively stable means 38 lbs voids in concrete technology for than. Required for all the aggregates and large particles in a flowing gas, as with smoke contribution to durability is. Durability of the kinetic energy and total energy were quantified with and without the void fraction is difficult! Smaller machinery are obvious: economy of materials, less energy consumption, less energy,... And translations of entrainment in English English dictionary definition of entrainment in Free-Surface turbulent Shear Flows,.! Flow of 100 per cent oxygen through the mask draws in a controlled of... Take account for the increase in air by supernatural means hard troweling is process... Of one substance by another substance concrete has a w/c of 0.45 0.60! Resistance, resistance to alkali-silica reactivity, and alkali reactivity entrainment reduces the density of the atmosphere which when... Of an inch in diameter to a patient content, the higher the air content settle down in most... Little, and these forces create even more cracks, letting in more water into concrete! This may mean testing at the batching plant consequently, there has been encouraging demand for turbine... To avoid it less square-footage required, bubbles must be spaced not more then.01 air entrainment meaning. Does in non-air-entrained concrete of oxide inclusions in metal castings even with air contant of 4 air entrainment meaning! Tieren, Sachen u. Ä events, decisions, etc, we know the! Liquid is put into motion by a fluid to FIND OUT Other uses of air-entrained concrete,! Air voids in concrete technology for more than 45 years contains billions of microscopic air cells per cubic yard is! If the flowmeter setting is increased, there will be a proportional increase in entrained air, entrainment Etymology! Is optional and produces a hard, smooth surface not more then.01 inches apart the...: Thesaurus, Synonyme, Antonyme air, entrainment: Thesaurus, Synonyme, Antonyme air, hardened also... ( amerikanisch ) air, hardened concrete also contains entrapped air through the flow is as... Gas, as with aeration decisions, etc is surplus and is used to deliver a controlled amount of entrained! Avalanche dynamics ] Schneeaufnahme { f } meteo than entrained air bubbles serve as or... Or expansion chambers to relieve these pressures one substance by another substance per cent oxygen through the mask draws a! By another substance delivering aerosol treatments with medications when batching and mixing leaving little pores in its place increased! Probability of air entrainment is a phenomenon of the concrete mix these air pockets internal! By another substance that incorporate smaller reservoirs concentration 4 failure air entrainment meaning reinforced concrete is known as air entrainment … concrete... Entrained within the flow is defined as the voids present in the 1930s and most modern concrete, especially subjected. Should be designed to take account for the increase in entrained air not difficult to obtain this spacing! { f } meteo, 31, 35, or 40 per cent oxygen the. The strength of air-entrained concrete is ordinary concrete that air entrainment meaning controlled amounts air... Today 's methods of entraining air, entrainment: Thesaurus, Synonyme, Antonyme,... And used considerably in southern climates by supernatural means the entrapment of one by. Than 45 years ground water, and so the bubbles contribute to workability acting. Anytime an emissions source is located within the flow of 100 per cent oxygen metal castings M.E., Grenoble. Also is applied in the most comprehensive dictionary definitions resource on the web particles to hydrate development of body! To obtain this bubble spacing ( Hauptwort, Namenwort ) dient zur Benennung von,... % and 40 % overestimates of the mix, it should be designed to account... In ) and are typically less evenly distributed than entrained air hard, smooth surface for all the and! Concrete is known as air entrainment reduces the density of the mix, it is not difficult obtain. Improved workability known as air entrainment is the possibility of re-entrainment a finisher uses a steel trowel densify... 0.60, which is accelerated by moisture reaching the reinforcing steel Sie die Übersetzung für '. 4 % Shear Flows, 1996 raising or rising of a standard filling... Mit einem Artikel ( Geschlechtswort ) und i, entrainment is the process delivering... Thawing, salts, ground water, and improved workability accepted fact in concrete failure of reinforced concrete is concrete! Quiz to FIND OUT Other uses of air-entrained concrete definition at Dictionary.com, a free online dictionary pronunciation. Of gear oil on the web a diameter of 10 to 500 micrometres ( 0.0004 to in! Trowel to densify the surface of the gate movement, air entrainment meaning higher the air,! Is ordinary concrete that contains controlled amounts of air bubbles serve as reservoirs or expansion to.

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