众所周知,混凝土在硬结过程中,由于水泥在最初几天产生大量的水化热和混凝土导热不良形成热量的积聚,使混凝土的温度升高和体积膨胀;而降温时,由于水化热的散发和体积缩小,混凝土往往产生裂缝。这是过去在混凝土施工中大家关心的技术和质量问题。近年来,我们在码头,船坞和桥墩 It is well-known that in the process of induration of concrete, due to the large amount of heat of hydration produced by cement in the first few days and the poor thermal conductivity of the concrete, the accumulation of heat causes the temperature of the concrete to rise and the volume expands. When the temperature is lowered, the heat of hydration is emitted and As the volume shrinks, concrete often cracks. This is a technical and quality issue that people are concerned about in the past in concrete construction. In recent years we have docks, docks and bridge piers