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耐碱玻璃纤维在混凝土中分散性良好,显著改善了混凝土的抗弯冲击性能。由梁弯曲冲击试验发现:当玻璃纤维掺量为1.6~2.7 kg/m3时,纤维掺量2.7 kg/m3(G 3)的初裂冲击次数比掺量2.0 kg/m3(G 2)和1.6 kg/m3(G 1)时分别提高1.97倍和2.81倍,比素混凝土提高10.97倍;G 2的初裂冲击次数比G 1提高28%,比素混凝土提高3.03倍。G 3的破坏冲击次数比G 2提高1.95倍,比G 1提高2.78倍,比素混凝土提高11.01倍;G 2的破坏冲击次数比G 1提高28%,比素混凝土提高3.08倍;G 1的破坏冲击次数比素混凝土提高2.18倍。纤维质量掺量由2.0 kg/m3提高到2.7 kg/m3时,对改善混凝土抗弯冲击性能效果十分显著。玻璃纤维显著改善了混凝土的抗弯冲击性能,可以用于机场道面、桥面等工程。
Alkali-resistant glass fiber dispersion in the concrete is good, significantly improving the impact resistance of concrete. The bending impact test of the beam showed that the initial cracking frequency of fiber volume 2.7 kg / m3 (G 3) was higher than that of 2.0 kg / m3 (G 2) when the glass fiber content was 1.6-2.7 kg / m 3 kg / m3 (G 1) increased by 1.97 times and 2.81 times, respectively, 10.97 times higher than that of concrete. The initial cracking frequency of G 2 was 28% higher than that of G 1 and 3.03 times higher than concrete. The damage impact number of G 3 is 1.95 times higher than G 2, 2.78 times higher than G 1 and 11.01 times higher than that of bismuth concrete. The damage impact times of G 2 are 28% higher than G 1 and 3.08 times higher than that of concrete. G 1 The number of damage impact than concrete 2.18 times. When the fiber mass content increases from 2.0 kg / m3 to 2.7 kg / m3, the effect of improving the flexural impact resistance of concrete is very significant. Glass fiber significantly improves the flexural and flexural properties of concrete, which can be used in airport pavement and bridge deck.