大体积砼施工,一方面从理论角度设计水泥水化热引起的砼中心温度与表面温度在25℃以内,另一方面还要在实际施工中及时准确地进行现场测定,并及时调整控制,达到防裂的目的。1 减小温差的措施1.1 原材料控制措施。①宜选低热水泥品种,如矿渣硅酸盐水泥或粉煤灰水泥,从而降低水化热,干缩 Large-scale concrete construction, on the one hand, from the theoretical point of view of the design of cement hydration heat center temperature and surface temperature within 25 °C, on the other hand, but also in the actual construction of timely and accurate on-site measurement, and timely adjustment and control to achieve The purpose of crack prevention. 1 measures to reduce the temperature difference 1.1 raw material control measures. 1 should choose low-heat cement varieties, such as slag Portland cement or fly ash cement, thereby reducing the heat of hydration, shrinkage