Behavior of Normal Concrete Beam with PCC During the Moisture Curing Period

Abstract

The compressive strength of concrete depends on the treatment it undergoes. One way to preserve concrete is by curing it with moisture. During curing chemical reactions still occur which cause deformation. This behavior was studied using 3 concrete beam specimens with Portland composite cement (PCC) measuring 15 cm x 15 cm x 60 cm, with a concrete quality of 20.75 MPa. The test object is placed on two supports, and the EVWSG is located 5 cm from the end of the test object. Observations during the curing period are carried out over 24-48 hours, every 60 minutes; 3-8 days, every 2 hours. The results showed that changes in ambient temperature resulted in changes at the temperature of the soaking water. The temperature of the soaking water is similar to the temperature of the concrete and has a sinusoidal pattern. Concrete deformation occurs in the form of shrinkage and expansion in the same pattern as the temperature pattern in concrete. The rate and magnitude of expansion and shrinkage are the same, this shows that during the curing process, the concrete is elastic even though the soaking water temperature is 1-6.4 ºC, which is higher than the Indonesian standard. There is a close relationship between the temperature in the concrete and deformation, as well as between the temperature in the concrete and the temperature of the soaking water. Concrete deformation can be approximated as a straight line parallel to the horizontal axis and is constant.