To investigate the influence of curing conditions and raw materials on the performance of engineered cement-based composites (ECCs), polypropylene fiber engineered cement-based composites (PP-ECCs) were designed and manufactured. The mathematical relationships between the fly ash content, curing temperature and PP-ECC tensile properties were explored by a uniaxial tensile test and by scanning electron microscopy. The results show the following: 1) with the increase in fly ash content and curing temperature, the ultimate tensile strain, ultimate tensile stress and tensile toughness index of the PP-ECC show a trend of first increasing and then decreasing, while the modulus of elasticity increases. 2) The optimum temperature is 20°C for the hydration reaction of the cementitious material inside the PP-ECC matrix. 3) When the fly ash content is 40% and the curing temperature is 20°C, the tensile mechanical parameters, ductility and toughness index of the PP-ECC are the best. This set of variables is recommended as a reference for PP-ECC engineering applications. 4) A mathematical relationship among the tensile strength, tensile strain and elastic modulus of the PP-ECC and coupling variables (fly ash content and curing temperature) is established.

为了研究固化条件和原料对工程水泥基复合材料（ECCs）性能的影响，设计并制造了聚丙烯纤维工程水泥基复合材料（PP-ECCs）。通过单轴拉伸试验和扫描电子显微镜研究了粉煤灰含量，固化温度和PP-ECC拉伸性能之间的数学关系。结果表明：1）随着粉煤灰含量和固化温度的升高，PP-ECC的极限拉伸应变，极限拉伸应力和拉伸韧性指数呈现先升高后降低的趋势，而模量为弹性增加。2）PP-ECC基质内部胶凝材料的水合反应的最佳温度为20°C。3）当粉煤灰含量为40％，固化温度为20°C时，PP-ECC的拉伸机械参数，延展性和韧性指数最佳。建议将这组变量作为PP-ECC工程应用程序的参考。4）建立了PP-ECC的拉伸强度，拉伸应变和弹性模量与耦合变量（粉煤灰含量和固化温度）之间的数学关系。