论文部分内容阅读
采用四因子二次回归通用旋转组合设计,对影响层布式碳纤维-聚丙烯混杂纤维混凝土力学性能的主要因素:水胶比、粉煤灰掺量、聚丙烯纤维掺量和碳纤维掺量,进行配合比试验,建立数学模型并确定其最优配比。结果表明:二次多项式回归模型可用于层布式混杂纤维混凝土28 d抗压强度和抗折强度回归方程的建立。层布式碳纤维-聚丙烯混杂纤维混凝土28 d抗压强度理论最大值可达到68.21 MPa,此时W/C为0.3,粉煤灰掺量、聚丙烯纤维掺量和碳纤维掺量均为0;而抗折强度最大值可达到8.84 MPa,此时水胶比为0.3,粉煤灰掺量为0,聚丙烯纤维掺量为1.2%,且碳纤维掺量为1.6%,进一步表明了聚丙烯纤维和层布式的碳纤维对混凝土抗压强度影响不大,但一定程度上可以显著改善其抗折强度。
The quadratic regression general rotation combination design was used to study the main factors affecting the mechanical properties of layered carbon fiber-polypropylene hybrid fiber reinforced concrete: water-cement ratio, fly ash content, polypropylene fiber content and carbon fiber content Mixture ratio test, the establishment of mathematical models and determine the optimal ratio. The results show that the quadratic polynomial regression model can be used to establish regression equation of compressive strength and flexural strength of 28-day hybrid hybrid fiber reinforced concrete. The theoretical maximum compressive strength of layered carbon fiber-polypropylene hybrid fiber concrete for 28 days reached 68.21 MPa, the W / C was 0.3, the content of fly ash, polypropylene fiber content and carbon fiber content were both 0; While the maximum flexural strength can reach 8.84 MPa, the water-cement ratio is 0.3, the content of fly ash is 0, the content of polypropylene fiber is 1.2%, and the content of carbon fiber is 1.6%, which further indicates that the polypropylene fiber And the layered carbon fiber has little effect on the compressive strength of concrete, but to a certain extent, it can significantly improve the flexural strength.