Effect of Ethylene Vinyl Acetate (EVA) on the Setting Time of Cement at Different Temperatures as well as on the Mechanical Strength of Concrete

摘要

This study presents the effect of ethylene vinyl acetate (EVA) on the setting time of cement at different temperatures as well as on the compressive, flexural and tensile strength of concrete. Setting time tests were conducted at various percentages of EVA at different temperatures (i-e 22, 35 and 50 degrees C). It was found that the setting time was increasing with an increase in the EVA percentage. Moreover, for strength evaluation, samples of EVA-modified concrete were prepared with various percentages of EVA by weight of cement and then tested for compressive, flexural and tensile strength at the curing age of 3, 7 and 28 days. The results revealed that the compressive and flexural strength of EVA-modified concrete tended to increase at a rapid rate by incorporating EVA up to 16%, but beyond this percentage the rate of strength development become slow at all the ages, but in case of split tensile strength, it was maximum at 4% EVA and got decreased with further increase in EVA percentage.