Tutorial Qns - Compaction PDF

Preview

Summary

Tutorial...

Description

COMPACTION: 1. The bulk unit weight of a compacted fill is 18.5 kN/m3. The water content is 22% and the degree of saturation is 0.8. Assume Gs = 2.67. (a) What is the dry unit weight of the fill? (b) What is the void ratio? (c) What is the bulk unit weight if the fill is fully saturated? (d) What is key assumption used in part (3) and discuss if it is realistic?

Ans:

a) 15.2 kN/m3 c) 19.3 kN/m3

b) 0.73

2. In a standard Proctor compaction test, the following results were obtained: Water Content (%) 22.8 26.0 29.0 31.6 34.0

Dry Density 3 (kg/m ) 1290 1450 1460 1420 1360

Plot the dry density - water content relationship and the 90% and 100% saturation line. 3 Assume that the density of solids is 2600 kg/ m . Also determine: (a) optimum water content (b) maximum dry density (c) water content range where degree of saturation is greater than 90%. (d) water content range for relative compaction of 95%. Ans:

a) OMC=27.6% c) w>26.8%

b) 1463 kg/m3 d) 24.3...