Experimental study on early strength of polymer concrete reinforced by basalt fiber content and age

Abstract

In order to study the modification effect of basalt fiber in the address polymer concrete, three groups of basalt fiber reinforced geopolymer concrete (BFRGC) with volume content of 0.1%, 0.2% and 0.3% respectively were selected, for its early mechanical properties test. The test adopts HYY series hydraulic servo test system, and the test piece is tested for quasi-static mechanical properties by standard curing to 3 d, 7 d, and 28 d. The test results show that the addition of basalt fiber in the enhanced geologic concrete can effectively improve its early quasi-static mechanical properties. The early compressive strength, flexural strength and tensile strength of basalt fiber reinforced geopolymer concrete were greatly improved, and the degree of improvement was positively correlated with the curing time of the test piece, which was 1.67 times higher than that of 3.3 d for 7 d and 28 d. For each strength, the compressive strength is the most improved, the tensile strength is the smallest, and the flexural strength is moderate. At the same time, in the concrete with the basalt fiber, the addition of the enhanced geopolymer can further improve the concrete mechanics. Performance, and the optimal blend of basalt fiber is 0.1%.