摘   要：为了解决传统应变硬化水泥基复合材料（以下简称SHCC）高成本和高水泥用量的问题，用国产PVA纤维和河砂分别全部取代传统SHCC中广泛使用的进口PVA纤维、超细石英砂，并用粉煤灰等质量部分取代50.0%、62.5%、75.0%的水泥，制备了低成本、低碳SHCC，研究了粉煤灰掺量和砂胶比对SHCC力学性能的影响，并用SEM观察了其微观形貌。结果表明：用国产PVA纤维和河砂可以制备出低成本、低碳SHCC；随着粉煤灰掺量的增加，试件的抗压、抗折和拉伸强度降低，但延性提升；随着砂胶比的增加，试件的抗压、抗折强度降低，拉伸强度提高，延性降低。 Abstract: In order to solve the problem of high cost and high cement content in traditional strain hardening cementitious composites(SHCC), the low-cost and low-carbon SHCC was prepared by partly replacing imported PVA fibers and ultrafine quartz sand widely used in traditional SHCC with domestic PVA fibers and river sand, respectively, and replacing 50.0%, 62.5% and 75.0% of cement with fly ash. The effects of fly ash content and sand-binder ratio on the mechanical properties of SHCC were studied, and the microstructure was observed by using SEM. The results show that the low-cost and low-carbon SHCC can be prepared by using domestic PVA fibers and river sand. With the increase of fly ash content, the compressive, flexural and tensile strength of the specimen decrease, but the ductility increases. As the sand-binder ratio increases, the compressive and flexural strength of the specimen decrease, the tensile strength increases, and the ductility decreases.

武猛.低成本、低碳SHCC的制备及力学性能研究[J].混凝土与水泥制品,2023(12):58-61. WU M.Study on preparation and mechanical properties of low-cost and low- carbon SHCC[J].China Concrete and Cement Products,2023(12):58-61.

摘   要：对比研究了木质纤维、聚丙烯纤维和钢纤维的体积掺量（0、0.3%、0.6%1.0%）对再生骨料透水砖力学性能和透水系数的影响，并进行了试生产。结果表明：随着纤维掺量的增加，3种纤维增强再生骨料透水砖的劈裂抗拉强度和抗折强度基本均呈增大趋势，且钢纤维的提高效果最好，其次是聚丙烯纤维，最后是木质纤维；掺入纤维虽然降低了再生骨料透水砖的透水系数，但仍满足国标中B级透水系数（≥1.0×10-2 cm/s）要求；聚丙烯纤维增强再生骨料透水砖的试生产效果良好。 Abstract: The effects of volume content of wood fiber, polypropylene fiber and steel fiber(0, 0.3%, 0.6% 1.0%) on the mechanical properties and permeability coefficient of recycled aggregate permeable bricks were compared and studied, and the trial production was conducted. The results show that with the increase of fiber content, the splitting tensile strength and flexural strength of three types of fiber reinforced recycled aggregate permeable bricks show an increasing trend, and steel fiber has the best improvement effect, followed by polypropylene fiber and finally wood fiber. Although the addition of fiber reduces the permeability coefficient of recycled aggregate permeable bricks, it still meets the B level permeability coefficient (≥1.0×10-2 cm/s) requirement of national standard. The trial production effect of polypropylene fiber reinforced recycled aggregate permeable bricks is good.

陈向杰,王淼,李岩凌,等.纤维增强再生骨料透水砖的性能研究[J].混凝土与水泥制品,2023(12):62-64,69. CHEN X J,WANG M,LI Y L,et al.Study on performance of fiber reinforced recycled aggregate permeable bricks[J].China Concrete and Cement Products,2023(12):62-64,69.

王红建,陈壮,赵禹兴,等.有机纤维对工程地聚合物复合材料早期力学性能的影响[J].混凝土与水泥制品,2023(12):65-69. WANG H J,CHEN Z,ZHAO Y X,et al.Effect of organic fibers on early mechanical properties of engineering geopolymer composites[J].China Concrete and Cement Products,2023(12):65-69.