10 Questions
What happens when excess water is added to the concrete mixture?
Separation and negative impact on finishing and strength
What is the approximate percentage of aggregates in the total volume of concrete?
60% to 75%
What is the primary function of superplasticizers in concrete?
To reduce the water content of the mixture
What is the purpose of set-retarding admixtures in concrete?
To slow the rate of hydration
What is the most commonly used method to measure the workability of concrete?
Slump test
What is the primary purpose of an air entrained admixture in concrete?
To preserve as many smaller air voids as possible
What is the effect of excessive impurities in the water used for mixing concrete?
It affects the setting time, strength, corrosion of reinforcement, reduced durability, and staining
What is the ideal range of cement content in a typical concrete mixture?
10 to 15 percent
What is the effect of large air voids in concrete?
It results in poorly consolidated concrete and reduced strength
What is the primary factor that affects the workability of fresh concrete?
Water-cement ratio
Learn about the components of concrete, including the role of cement, aggregate, water, and air voids. Discover how air entrained admixtures improve concrete strength and properties.
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