Concrete Technology Part 1

January 21, 2020

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1. The chemical reaction between cement and water is
2. The resistance of an aggregate to the effect of hydration of cement and weather is called
3. Workability of concrete is directly proportional to
4. Approximate value of shrinkage strain in concrete is
5. The failure strain of concrete under direct compression and under flexure are respectively
6. Tensile strength of concrete is approximately______________of the compressive strength of concrete.
7. According to IS: 269-1976, the requirement of an ordinary Portland cement is that
8. The property of fresh concrete, in which the water in the mix tends to rise to the surface while placing and compacting, is called
9. The binding material in the mortar is also called   [ SSC JE 2019]
10. The removal of excess air after placing concrete helps in increasing the strength of concrete by
11. The aggregate is said to be elongated when
12. The ratio of 7 days and 28 days cube strength is
13. The cement concrete, from which entrained air and excess water are removed after placing it in position, is called
14. Tensile strength of concrete is measured by
15. Too much fineness of cement
16. Strength of concrete increases with
17. Modulus of rupture of concrete gives
18. A concrete cube of 15 cm and a cylinder of 150 mm diameter and 300 mm height are tested for compressive strength, the strength of the cube compared to cylinder will be
19. The fineness of cement is measured in terms of
20. Strength of commonly used concrete for constructing low rise residential buildings is
21. The strength of concrete after one year as compared to 28 days strength is about
22. Workability of concrete is inversely proportional to
23. Increase in moisture content in concrete
24. The degree of grinding of cement is called
25. The setting time of cement is the governing factor for
26. The resistance of an aggregate to wear is known as
27. Which of the following cement is expected to have the highest compressive strength after 3 days?
28. The compressive strength of an ordinary Portland cement (1:3 cement mortar cube) after 7 days test should not be less than
29. The phenomenon by virtue of which the cement does not undergo large change in volume when treated with water is known as
30. The percentage of water for making a cement paste of normal consistency varies from
31. The property of the ingredients to separate from each other while placing the concrete is called
32. As the cube size increases, the strength of concrete
33. The cement, widely used in retaining walls is
34. According to IS 456, under normal circumstances, the maximum cement content in kg/cum (including fly ash and slag) allowed
35. The strength of concrete using air entraining cement gets reduced by

 

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A Demrot is the founder of VideRime Online Learning, a leading engineering website. He did his BE Civil and M.Tech Structure from RGPV University, Bhopal and has been working as an Assistant Professor in a reputed college.

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