Technical Questions

Question: Can the heat liberated by the hydrating cement be relied on to give protection during cold weather?

Question: What are set-controlling admixtures?

Question: What methods are used for protecting concrete against low temperatures?

Question: When should saw cuts be made on a concrete slab?

Question: Estimating in-place concrete strength

Question: Factors affecting time of setting

Question: Would adding more cement serve the purpose of admixtures?

Question: What is the importance of curing on strength?

Question: The effect of pozzolans on freezing and thawing resistance

Question: What is an air-entraining admixture?

Question: Commonly used accelerating admixture

Question: Protecting concrete from cycles of freezing and thawing

Question: What is the effect of freezing on concrete?

Question: When heated enclosures are used to protect freshly placed concrete, what precautions are necessary?

Question: When water and aggregate are heated, are any limitations necessary?

Question: When is steam curing used?

Question: Does additional curing improve the properties of concrete in other ways than in strength?

Question: How is the air content of freshly mixed concrete determined?

Question: Is density a good indicator of air content?