The basic purpose of a retarder in concrete is
Answer: to increase the initial setting time of cement paste in concrete
Building Materials
- Paints with white lead base are suitable for painting of
- With increase in moisture content, the bulking of sand
- The slump recommended for mass concrete is about
- Le-Chatelier's device is used for determining the
- Quick lime is
- Glazing is used to make earthenware
- No. of bricks required for one cubic metre of brick masonry is
- Which of the following bricks are used for lining of furnaces?
- First class brick when immersed in cold water for 24 hours should not absorb water more than
- The age of a tree can be known by examining
- In which of the following directions, the strength of timber is maximum?
- Percentage of carbon content in mild steel is less than
- Plywood has the advantage of
- Specific gravity for most of the building stones lies between
- Which type of cement is suitable for use in massive concrete structures such as large dams
- Predominant constituent which is responsible for strength in granite is
- Which of the following metamorphic rocks has the most weather resisting characteristics?
- Addition of pozzolana to ordinary Portland cement increases
- First class timber has an average life of
- The normal consistency of ordinary Portland cement is about
- The initial setting time for ordinary Portland cement as per I.S. specifications should not be less than
- The most common admixture which is used to accelerate the initial set of concrete is
- The main ingredients of Portland cement are
- The nominal size of the modular brick is
- As per I.S. specifications, the maximum final setting time for ordinary Portland cement should be