THE EFFECT OF CEMENT PASTE AND FIBER CONTENT TO SLUMP AND COMPRESSIVE STRENGTH OF POLYPROPYLENE FIBER CONCRETE

Abstract

To investigate the effects on the slump and compressive strength, this paper produced the sample groups which have the contents of cement paste (composed of cement and water) and Polypropylene fiber were fluctuated within the levels close to the value corresponding to the fundamental composition. Research results show that: The slump of the concrete mixture was directly proportional to the cement paste content but inversely directly proportional to the fiber content. When the used contents of cement paste and fiber were not too high, the compressive strength of the concrete was directly proportional to them. However, when they exceed the limit value, the compressive strength of the concrete will decrease. Synthesizing the impact on the criteria, with B15 concrete, the optimal contents of cement paste and fiber by mass were in the range of 19.1-22.4% and 1-2 kg/m3, respectively.