Building Materials
Which of the following cements contains maximum percentage of dicalcium silicate?

Low heat cement
Sulphate resisting cement
Ordinary Portland cement
Rapid hardening cement

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Building Materials
Acrylic sheets

Possess the light transmission rate of 93%
All of these
Possess 10 to 17 times greater breakage resistance than that of glass of equivalent thickness
Are generally unaffected by most household detergents

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Building Materials
The basic purpose of a retarder in concrete is

To render the concrete more water tight
To decrease the initial setting time of cement paste in concrete
To increase the initial setting time of cement paste in concrete
To improve the workability of concrete mix

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