Question

As the general contractor for a project, you are responsible for overseeing the pouring of the concrete slab foundation. When should the subgrade be lightly moistened prior to pouring the slab?

One day before concrete is poured to allow the water to penetrate.
Prior to pouring the concrete.
When temperatures will exceed 90�� F.
When Type III concrete is being used.

Answer 1

The subgrade should be lightly moistened prior to pouring the concrete to prevent rapid absorption of moisture and ensure the strength and curing process of the slab.

Step-by-step explanation:

The subgrade should be lightly moistened prior to pouring the concrete. Moistening the subgrade helps to prevent the moisture in the concrete from being absorbed too quickly, leading to a weaker slab. It is important to ensure that the subgrade is not overly saturated, as excessive moisture can also negatively affect the concrete's strength and curing process.