Hardened cement paste, like sand and stone aggregates, is a porous solid and will absorb water. If the temperature drops to freezing point, the water in the porous concrete will freeze.

Weathering is the physical and chemical breakdown of rock at the earth’s surface. The physical breakdown of rock involves breaking rock down into smaller pieces through mechanical weathering processes. These processes include abrasion, frost wedging, pressure release (unloading), and organic activity.

Abrasion- Rocks collide causing the rocks to chip and become smooth. resistance- the sand creates resistance and acts like sand paper to smooth the rocks. motion of the water- The motion of the water pushes the rocks and causes the rocks to collide with the rocks and stream beds.

Cement hardens when it comes into contact with water. This hardening is a process of crystallization. Concrete is completely fluid before the cement sets, then progressively hardens. The cement and water mixture that has crystallized in this way encloses the aggregate particles and produces a dense material.

Why concrete is not watertight. A fully hardened concrete contains some 20% air. The higher the proportion of water that is used in the concrete mix (measured in WCR, water-cement ratio) the more porous and more air the fully hardened concrete has. Proportion of air > 20% after dewatering. Capillary system and pores.

If there is not enough water, the concrete will be hard to work into place. Concrete that is too dry on the left, and too wet on the right. #3: Once the concrete is poured, you can just leave it to dry, or, better yet, blow some fans on it to help it dry faster.

Concrete can set up under water. Having a wet concrete floor that has hardened / cured properly does not weaken the floor. The strength of concrete is based on the cement (portland cement) to water ratio. Too much water makes the concrete weaker.

Damp ground will not be a problem unless is can not support the weight of the concrete. Cement/concrete does not “dry” , it cures , a chemical reaction. It absorbs water to cure, as noted , some concrete applications are sprayed with water to aid the cure.

24 hrs

You will need 3 quarts (2.8 liters) of water for every 80 pounds (36.3 kilos) of Quikrete concrete. At this point, you can also stir in some liquid cement coloring. Pour two-thirds of the water into the hole you made. Do not add all of the water yet.

Whether you are building a new fence, setting a mailbox or anchoring a basketball goal or play set, QUIKRETE® Fast-Setting Concrete is the ideal product for the job. With Fast-Setting Concrete there is no mixing or tools required – You simply pour the dry mix right from the bag into the hole, then add water.

You need a half gallon or up to 4 pints (1.7 L) of water for a 60-pound bag of concrete. That works out to about a pint for every 15 pounds of concrete.