Building Materials — Important Questions
Telangana Open School (TOSS) · Class 12 · Chemistry
43 important questions from Building Materials for Telangana Open School (TOSS) Class 12 Chemistry, with answers. Covers Cement, Glass and Ceramics.
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Important Questions from Building Materials
Which of the following are raw materials for Portland cement?
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Limestone,Clay,Gypsum,Coal
Limestone and clay are primary raw materials; gypsum is added to control setting time; coal is used as fuel in the kiln.
Glass is an amorphous solid.
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True
Glass lacks a regular crystalline structure and is classified as an amorphous solid or supercooled liquid.
Which type of cement is used in construction near seawater?
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High Alumina Cement
High alumina cement has superior chemical resistance and can be safely used with seawater and sulfate-rich environments.
What is the purpose of adding gypsum to cement?
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To control setting time
Gypsum is added to slow down the setting process of cement; without it, cement would set too quickly.
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