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Questions and Answers
What are the basic thermal properties of concrete?
Thermal conductivity and diffusivity, specific heat, coefficient of thermal expansion
How can the wear resistance of concrete be improved?
Using lower water-cement ratio, lowest slump, good quality graded aggregate, etc.
How is the bond strength between steel reinforcement and concrete determined?
By pullout tests - load required to cause a slip of 0.25mm divided by the area of contact
What factors affect the modulus of elasticity of concrete?
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What is the function of porosity in determining the permeability of concrete?
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Which curing method is suitable when early strength gain in concrete is required?
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What can be applied to concrete surfaces to reduce moisture loss during curing?
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How can precast concrete sections be cured for strength development?
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What method can be used to apply heat during cold weather for concrete curing?
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When can steam curing be used to cure concrete?
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What should be done to concrete when the temperature goes below freezing?
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Which of the following is NOT a consideration for determining the curing period of concrete?
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What is a suitable method for insulating concrete when the temperature falls below freezing?
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Which technique can be used to apply additional heat during the curing of concrete in cold weather?
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What type of material can be used to reduce moisture loss on a concrete surface during curing?
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