Q25. | A watery scum that is formed on top of concrete due to excessive water or excessive use of trowel or float is called : |
Q26. | Light weight concrete is prepared by : |
Q27. | Inert material of cement concrete mix is : |
Q28. | An aggregate is called cylopean aggregate if its size is more than : |
Q29. | Addition of calcium chloride in concrete results in : |
Q30. | An aggregate is called flaky, if its least dimension is less than : |