For concrete exposed to a very aggressive environment the w/c should – McqOptions

MCQOPTIONS

1.	For concrete exposed to a very aggressive environment the w/c should be lower than __________
A.	1
B.	.5
C.	.4
D.	.8
Answer» D. .8

Discussion

No Comment Found

Related MCQs

Concentration of water-soluble sulphates in water ___________ ppm for severe exposure.
Concentration of water-soluble sulphates in water ___________ ppm for mild exposure.
The quality of concrete, specifically a ____________ cement content, is the best protection against sulphate attack.
For concrete exposed to a very aggressive environment the w/c should be lower than __________
The addition of a pozzolanic admixture such as fly ash reduces the ____________
Consider a two-dimensional flow through isotropic soil along x direction and z direction. If h is the hydraulic head, the Laplace’s equation of continuity is expressed as
A stratum of soil consists of three layers of equal thickness. The permeability of both the top and the bottom layers is 10-4 cm/s and that od middle layer is 10-3 cm/s ; then the value of the horizontal coefficient of permeability for the entire composite of the soil layers is
Approximate ratio of the permeability of two clay soils, having D10 values of 0.8 mm and 0.4 mm respectively, is
Determine the value of critical hydraulic gradient for a loose deposit of sand having a void ratio of 0.67 and specific gravity of 2.67.
Falling head permeability test is carried out on a soil specimen having cross-sectional area of 60 sq.cm. and height of 15 cm. The water level in the stand pipe of diametre of 0.5 cm drops from 100 cm to 40 cm in half an hour. What is the coefficient of permeability (cm/s)?