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Abstract
The effects of the ambient temperature on the fresh and hardened properties of cement mortar and concrete with superplasticizers of different families were investigated over the range of 5-40°C. Normally a concrete mix is designed at a standard testing condition but is used in a totally different or varying site conditions. Such changes in ambient conditions, especially temperature, can affect the fresh as well as the hardened properties of concrete significantly. It is observed that fluidity of cement mortar and concrete decreases with an increase in the ambient temperature, both with and without superplasticizer. The compressive strengths of mortar and concrete increases initially with an increase in the initial exposure temperature and thereafter decrease. The flexural strength of mortar and splitting tensile strength of concrete were also found to decrease with an increase in initial temperature.
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