Admixture, air-entraining—An admixture that causes the development of a system of microscopic air bubbles in concrete, mortar, or cement paste during mixing, usually to increase its workability and resistance to freezing and thawing. Admixture, permeability-reducing – An admixture used …
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What is an air-entraining admixture? - American Concrete Institute
It is an admixture that causes the development of a system of microscopic air bubbles in cement paste during mixing, usually to increase its resistance to freezing and thawing and to improve …
discussed in detail and, in this report, are classified into 13 groups: air-entraining; accelerating; water-redu cing and set-retarding; admixtures for flowing concrete; admixtures for self …
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with two air-entraining admixtures (AEAs)—one surfactant-based and one foaming polymer-based—was examined based on freezing- and-thawing durability, scaling resistance, and air …
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Air content common limits - American Concrete Institute
To achieve the generally desired bubble spacing of 0.2 mm using an air-entraining admixture meeting the requirements of ASTM C260, the dosage should be sufficient to produce 9% air in …
Mixing Procedure Parameters Affecting Air Entrainment in Concrete
2022年7月1日 · The present study investigates how the mixing procedure of concrete can affect air content and air void distribution. In addition, chemical parameters like air-entraining agent …
classified into 12 groups: air-entraining; normal, mid- and high- range water-reducing; accelerating; set-retarding; extended set- control; workability-retaining; viscosity- and rheology …
Air tests for non-air-entrained concrete - American Concrete …
ACI 301-20 “Specifications for Concrete Construction” require the total air content of hard-troweled interior concrete floors to not exceed 3 percent. According to ACI 302.1R-15 “Guide …
The effect of air content on concrete strength
How does air content affect strength? A. Intentionally entrained air voids improve the resistance of concrete to damage from cycles of freezing and thawing. Any air voids reduce the strength of …
What is an air-entraining admixture? - American Concrete Institute
A. It is an admixture that causes the development of a system of microscopic air bubbles in cement paste during mixing, usually to increase its resistance