中文摘要：

为了考察超级吸水颗粒（ superabsorbent polymer particles, SAP）对高延性水泥基复合材料（ engineered cementitious composites, ECC）性能的影响,研究了SAP的质量分数分别为0、0．2%和0．4%时,6组水泥基复合材料的抗弯性能、抗压强度、抗折强度及裂缝分布特点.结果表明,水泥基复合材料的28 d挠度都不低于10 mm； SAP的质量分数越高, ECC的挠度越大.粉煤灰的质量分数为70%时,水泥基复合材料的28 d挠度超过了25 mm. SAP的质量分数越多,抗压强度和抗折强度都有不同程度的减小,但其后期强度增加较快.此外, ECC的弯曲变形能力与金属相似；在基体中引入SAP颗粒,能够增加裂缝数量,减小裂缝宽度和裂缝间距.

英文摘要：

The influence of superabsorbent polymer （ SAP） particles on the mechanical properties of engineered ce-mentitious composites （ ECC ） is investigated by employing the four-point bending test, compressive strength and flexural strength. Six different ECC mix proportions are applied, and the replacement levels of fly ash are 50% and 70%, and SAP contents are 0, 0. 2% and 0. 4% of binder materials, respectively. The results show that the deflec-tion of ECC on Day 28 is not less than 10mm. The deflection of ECC becomes larger with the increase of the content of SAP. Especially, when the replacement level of fly ash is 70%, the deflection of ECC on 28 days is 25mm, the increase of SAP will result in decrease of the compressive strength and flexural strength of ECC on Day 28 , and obvious increase of the compressive strength after Day 28. The ductility of ECC is similar to that of metal. Incorpora-ting SAP into matrix can increase the crack number and reduce the crack width and crack distance.