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Mechanical properties of fly ash concrete composite reinforced with

机译：掺粉煤灰混凝土的力学性能。

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A parametric experimental study has been conducted to study the effect of nano-SiO2 particles and steel fibres on the mechanical properties of the concrete composite containing fly ash. Five different nano-SiO2 contents (1%, 3%, 5%, 7% and 9%) and five different steel fibre contents (0.5%, 1%, 1.5%, 2% and 2.5%) were used. The results indicate that addition of nano-SiO2 and steel fibres decreases the slump and slump flow of the fresh concrete composite containing fly ash, and both the slump and slump flow decrease gradually with the increase in nano-SiO2 and steel fibre content. The addition of nano-SiO2 improves the mechanical properties of concrete composites containing fly ash. There is an increase in the compressive strength and compressive modulus of elasticity with increase of nano-SiO2 content when it is below 5%, while they begin to decrease after the nano-SiO2 content is beyond 5%. Steel fibres help improve the mechanical properties of concrete composite containing fly ash and nano-particles. With the appropriate fibre content, the reinforcement of steel fibres on the compressive strength and compressive modulus of elasticity of the concrete composite becomes more obvious as the fibre content increases
机译：进行了参数化实验研究，以研究纳米SiO2颗粒和钢纤维对粉煤灰混凝土复合材料力学性能的影响。使用五种不同的纳米SiO 2含量（1％，3％，5％，7％和9％）和五种不同的钢纤维含量（0.5％，1％，1.5％，2％和2.5％）。结果表明，纳米SiO 2和钢纤维的加入降低了粉煤灰的新鲜混凝土复合材料的坍落度和坍落度，并且随着纳米SiO 2和钢纤维含量的增加，坍落度和坍落度均逐渐降低。纳米SiO 2的添加改善了包含粉煤灰的混凝土复合材料的机械性能。当纳米SiO 2含量低于5％时，其抗压强度和压缩弹性模量随纳米SiO 2含量的增加而增加，而当纳米SiO 2含量超过5％时，它们开始降低。钢纤维有助于改善包含粉煤灰和纳米颗粒的混凝土复合材料的机械性能。在纤维含量适当的情况下，随着纤维含量的增加，钢纤维对混凝土复合材料的抗压强度和压缩弹性模量的增强作用会更加明显。

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