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在28 d抗压强度相近的前提下,制备了纯水泥混凝土、大掺量粉煤灰混凝土、大掺量矿渣混凝土,测定了不同混凝土的后期抗压强度、抗氯离子渗透性,以及胶凝材料的化学结合水、硬化浆体中的Ca(OH)_2含量。结果表明:含大掺量矿物掺合料的混凝土的后期强度和抗氯离子渗透性均明显高于纯水泥混凝土;大掺量矿渣混凝土的后期强度高于同掺量的大掺量粉煤灰混凝土;复合胶凝材料的后期水化程度增长率明显高于纯水泥;复合胶凝材料硬化浆体中后期Ca(OH)_2含量明显低于纯水泥硬化浆体。
On the premise of similar compressive strength at 28 days, pure cement concrete, high-volume fly ash concrete and high-volume slag concrete were prepared and their compressive strength, resistance to chloride ion permeability and gelation Chemical bonding of materials Ca, OH content in hardened paste. The results show that the strength and resistance to chloride ion permeability of concrete with high content of mineral admixture are obviously higher than that of pure cement concrete. The later strength of high content of slag concrete is higher than that of high content of fly ash Concrete; the rate of hydration of composite cementitious material increases obviously at a later stage than that of pure cement; the content of Ca (OH) 2 in the later stage of composite cementitious material is obviously lower than that of pure cement.