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Dr. Trefor P. Williams
Dr. Perumalsamy Balaguru
Dr. Trefor P. Williams
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Quality assurance is an important component of concrete construction. In most cases the quality of concrete is assessed using 28 day companion cylinder strengths Because corrections cannot be done economically after 28 days, the quality of concrete is always monitored at earlier stages. The most widely used quality control measure of plastic concrete is slump. The other measures are air content and wet density.