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活性粉末混凝土具有优异的力学性能和耐久性,本文按照正交设计方法设计了9组不同配合比的活性粉末混凝土,通过试验研究了其基本力学性能及抗冻融性能,分析了水胶比、硅灰水泥比和钢纤维含量等因素对活性粉末混凝土力学性能及抗冻融性能的影响规律。研究表明,水胶比是影响活性粉末混凝土力学性能及抗冻融性能最主要的因素,钢纤维含量对活性粉末混凝土抗折和劈裂强度影响较为显著,对其抗压强度和抗冻融性能的影响不明显。本文根据试件破坏的现象对钢纤维作用的机理做了初步的探讨。
Active powder concrete has excellent mechanical properties and durability. In this paper, 9 groups of active powder concrete with different mixing ratios were designed according to orthogonal design. The basic mechanical properties and anti-freeze-thaw properties were studied by experiments. The effects of water- Silica fume cement ratio and steel fiber content and other factors on the mechanical properties and anti-freeze-thaw properties of reactive powder concrete. The results show that the water-cement ratio is the most important factor affecting the mechanical properties and anti-freeze-thaw properties of the reactive powder concrete. The influence of the steel fiber content on the flexural and splitting strengths of the reactive powder concrete is significant. The compressive strength and freeze- The effect is not obvious. In this paper, based on the phenomenon of specimen destruction on the role of steel fiber made a preliminary discussion.