Influence Mechanism of Steel Slag Aggregate/Fly Ash on Mechanical Properties and Mass Transport of Engineered Cementitious Composite (ECC)
LI Tong1, WANG Qinghe1,*, REN Qingxin2
1 School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China 2 School of Transportation, Civil Engineering & Architecture, Foshan University, Foshan 528225, Guangdong, China
Abstract: Aiming to explore the influence mechanism of steel slag aggregate and fly ash on mechanical properties and mass transport of engineered cementitious composite (ECC), the mechanical properties and mass transport performance of ECC with different steel slag replacement ratios and fly ash contents were studied by a series of tests, including porosity, compressive strength, tensile properties, capillary water absorption, and resistance to chloride ion erosion. The degree hydration of fly ash/cement cementitious system was explored by hydration degree analysis and microscopic morphological observation as the same. In addition, a prediction model for relative water content distribution in ECC was established based on unsaturated absorption theory. The results show that incorporation into steel slag enhances strength and permeability resistance but slightly reduced tensile strain capacity of the ECC. When the mass ratio of fly ash to cement increases from 1.2 to 2.0, the ultimate tensile strain of ECC increases by 30.89%. The main reason for steel slag to improve the strength and impermeability of ECC is the promoting effect on the hydration degree of fly ash/cement cementitious system.
李曈, 王庆贺, 任庆新. 钢渣骨料/粉煤灰对ECC力学与介质传输性能的影响机理[J]. 材料导报, 2025, 39(19): 24060141-7.
LI Tong, WANG Qinghe, REN Qingxin. Influence Mechanism of Steel Slag Aggregate/Fly Ash on Mechanical Properties and Mass Transport of Engineered Cementitious Composite (ECC). Materials Reports, 2025, 39(19): 24060141-7.
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2025, Vol. 39 
