在混凝土中掺入合成纤维,其增韧优点可有效减少混凝土梁表面早期裂缝,提高梁体的抗渗能力,延缓钢筋锈蚀,增强抗冻融能力等,使混凝土的耐久性指标得到改善。在混凝土配合比设计中,强度受混凝土中多种组份的影响,每个配比都有适合自己的外加剂最佳掺量和最佳砂率,低于这个最合适的点强度都会有所下降,同时强度随着水胶比的增大而减小,利用正交试验设计可以用尽可能少的试验次数来获得较多的试验信息,用来指导确定最终配合比。 Adulteration of synthetic fibers in concrete, the toughening advantages of which can effectively reduce the early cracks on the surface of concrete beams, improve the impermeability of the beam body, delay the corrosion of reinforcing steel, and enhance the resistance to freeze-thaw, so that the durability index of concrete is improved. In concrete mix design, the strength of the concrete by a variety of components, each ratio has its own best admixture dosage and the best sand rate, below the most suitable point strength will have Decline, while the intensity decreases with the increase of water-cement ratio, the use of orthogonal experimental design can use as few as possible to obtain more test information to test the final number, to guide the determination of the final mix.