Question

Following statement are made on compacted soil, where in DS stands for the soils compacted on dry side of optimum moisture content and WS stand for the soils compacted on wet side of optimum moisture content. identify incorrect statement:

• A. Soil structure is flocculated on DS and dispersed on WS
• B. Construction pore water pressure is low on DS and high on WS
• C. On drying, shrinkage is high on DS and low on WS
• D. On access to water, swelling is high on DS and less on WS

Answer 1

The correct option is C On drying, shrinkage is high on DS and low on WS

Soils compacted dry of optimum shrunk less on drying compared with those compacted wet of optimum. Sample of clay are at the same initial w/c but have different fabrics, the one that is more dispersed shrunk more. This is because the pore size are smaller in the dispersed sample thus allowing greater capillary stress and easier movement of particle and particle group.