Case 1
- Introduction
- Causes of Defects
- Good Practices
- Standards
- Maintenance and Diagnostics
- Remedial
- Similar Cases
- References
Good Practices
Concrete
Construction
Water cement ratio in the concrete is an important parameter to keep prevent crack. To prevent excessive evaporation during concreting on hot weathers, curing should begin as soon as possible. Water should be fogged or sprayed for 12 hours before using other curing methods. A white, heat reflective membrane or polyethylene may be applied later.
The curing period should also be extended seven days or longer during hot weather. To prevent early slump loss and rapid settling during hot weather concrete casting, temperature of the concrete mix can be kept low by using cooled water to mix the concrete.
The aggregate should also be kept in a shady place before use and kept moist by sprinkling water on it. Placing equipment should be shaded or covered with a wet burlap to keep the temperature low. the rate of water evaporation is rapid, especially for slabs.
Waterproofing
Design
The membrane should be laid to sufficient thickness as according to their manufacturer’s specification. and with sufficient lapping widths at joints.
Material
Material selection is also important factor to ensure the durability of waterproofing for the structure.