A. Compressibility and permeability decrease and dry strength increases
B. Compressibility, permeability and dry strength decrease
C. Compressibility, permeability and dry strength increase
D. Compressibility and permeability increase and dry strength decreases
Answer: Option D
This Question Belongs to Civil Engineering >> Highway Engineering
Highway facilities are designed for
A. annual average hourly volume
B. annual average daily traffic
C. thirtieth highest hourly volume
D. peak hourly volume of the year
The provision of traffic signals at intersections
A. reduces right angled and rear end collisions
B. increases right angled and rear end collisions
C. reduces right angled collisions but may increase rear end collisions
D. reduces rear end collisions but may increase right angled collisions
In CBR test the value of CBR is calculated at
A. 2.5 mm penetration only
B. 5.0 mm penetration only
C. 7.5 mm penetration only
D. both 2.5 mm and 5.0 mm penetrations
If aggregate impact value is 20 to 30 percent, then it is classified as
A. exceptionally strong
B. strong
C. satisfactory for road surfacing
D. unsuitable for road surfacing
1. Compressibility ↑
Higher LL generally means more water is required to bring the soil to the liquid state, indicating a soil with more fine/clayey characteristics. Such soil undergoes more volume change under load → compressibility increases.
2. Permeability ↓
More clay/fine particles mean smaller pore spaces. Water passes through these pores with greater difficulty → permeability decreases.
3. Dry strength ↑
Clay particles have greater cohesion. After drying, the cohesive forces between particles make the soil harder/stronger → dry strength increases.