The slope of curve obtained between the number of blows and water content in the cassagrande’s method is ______

The void ratio can never be ______

The sum of flakiness index and elongation index should not exceed ______

Cement specific gravity is measured by ______

The liquid limit of the soil is determined by ______

Which material can be replaced in concrete for a strong pervious concrete pavement?

The skid number for highways should not be less than ______

The unpaved shoulder usually consists of ______