Case 3
Navigation
- Introduction
- Causes of Defects
- Good Practices
- Standards
- Maintenance and Diagnostics
- Remedial
- Similar Cases
- References
Good Practices
Design
- It is essential for the designer to have an understanding of the effect of joint movement in order to select specifications which eliminate the risk of movement being transmitted to the waterproofing covering.
- The length of scupper drain must be join together with proper concrete mix design. ( 1:2:4 ).
Construction
- 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 aggregates should also be kept in a shady place before use and kept moist by sprinkling water on it.
- Placing equipment should be shaded or cover with a wet burlap to keep the temperature low. the rate of water evaporation is rapid, especially for slabs.