The purpose of quality control in construction engineering is to produce an end product which is structurally sound, durable, functionally adequate, uniform in quality and economical, utilizing to the maximum extent locally available engineer resources. At present there are no satisfactory methods available for rectifying the defects or improving the quality of hardened concrete. However, if suitable controls and checks are adopted during construction, these defects would be largely minimised. The aim of quality control is to ensure that the'properties of concrete should not vary beyond the specified limits.
A rational basis for quality control can be formulated on the following lines:
a) Laying down stipulations/specifications:
- for quality requirements of concrete in relation to the quality requirements of the structure;
- with regard to the ingredients viz their properties, storing and testing;
- for proportioning, batching and mixing of the ingredients;
- for transporting mix concrete to its final place of use;
- for placing and compacting of concrete;
- for curing of concrete:
- for testing of quality of concrete
b) Specify the mode of analysis and interpretation of data.
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