矿渣掺量对胶砂和混凝土强度的影响

本文研究了矿渣掺量对胶砂强度、混凝土强度和混凝土与钢筋的粘结强度的影响。在水泥胶砂或粉煤灰-水泥胶砂中,用矿渣取代部分水泥后,胶砂3 d强度会降低,且随取代量增加,胶砂3 d强度逐渐降低。在水泥胶砂或粉煤灰-水泥胶砂中,当矿渣取代水泥量≤55%时胶砂28 d强度会增加,但矿渣取代水泥量≧60%时胶砂28 d强度会下降。在水泥混凝土或粉煤灰-水泥混凝土中,当矿渣取代水泥量≦50%时混凝土28 d强度及其与钢筋的粘结强度会提高,但矿渣取代水泥量≥60%时混凝土强度和粘结强度会降低。

Effect of Slag Content on the Strength of Mortar and Concrete

In this paper,the effects of the content of slag on the strength of mortar and concrete and the bond strength between concrete and steel bar were studied.With the increase of substituted amount of cement by slag in cement mortar or in fly ash-cement mortar,3 d strength of the mortar continuously decreased.If substituted amount of cement by slag was less than 55% in cement mortar or in fly ash-cement mortar,the 28 d strength of the mortar would increase;if substituted amount of cement was more than 60%,the strength of the mortar would decrease.Whether in cement concrete or in fly ash-cement concrete,the compressive strength and bond strength would increase if the substituted amount of cement by slag was less than 50%;they would decrease if the substituted amount of cement was higher than 60%.