Question

How to prevent concrete crazing? What precautions should be taken to prevent/avoid concrete crazing?

Answer 1

To prevent crazing of concrete, follow the steps below:

1. Use moderate slump (3-5 inches) concrete with reduced bleeding characteristics.
2. Follow recommended practices and timing, based on concrete setting characteristics, for placing and finishing operations:
3. Avoid excessive manipulation of the surface, which can depress the coarse aggregate, increase the cement paste at the surface, or increase the water-cement ratio at the surface.
4. DO NOT finish concrete before the concrete has completed bleeding (look for the presence of a water sheen on the surface). DO NOT dust any cement onto the surface to absorb bleed water. DO NOT sprinkle water on the surface while finishing concrete.
5. Cure properly as soon as finishing has been completed