玄武岩纤维混凝土抗冻性能试验研究

Experimental study on frost resistance of basalt fiber reinforced concrete

立足耐久性能指标中的抗冻性能,通过普通混凝土、玄武岩纤维混凝土在冻融循环下的相对动弹性模量及质量损失的对比试验,讨论了玄武岩纤维对混凝土抗冻性能的影响,并对构件中是否掺入粉煤灰进行了讨论。试验表明,玄武岩纤维可以提高混凝土的抗冻性能,在100次冻融循环后,与素混凝土相比,玄武岩纤维混凝土的相对动弹模是其的1.47倍;质量损失是其的0.64倍;粉煤灰会影响其的抗冻性能,工程应用时要考虑其具体掺量。研究成果对玄武岩纤维混凝土的工程应用有一定参考价值。

Based on the frost resistance performance in durability index, the article compares the relative dynamic elastic modulus and mass loss of ordinary concrete and basalt fiber reinforced concrete under freeze-thaw cycles, and discusses the effect of basalt fiber on the frost resistance of concrete. The discussion of whether or not fly ash is incorporated into the structure is also discussed. Experiments show that basalt fiber can im-prove the frost resistance of concrete. After 100 cycles of freezing and thawing, the relative dynamic elastic modulus of basalt fiber reinforced con-crete is 1.47 times that of plain concrete, the mass loss is 0. 64 times that of basalt fiber concrete, ash will affect its frost resistance, engineering applications to consider its specific content. The research results have certain reference value to engineering application of basalt fiber concrete.