一、前言混凝土的开裂是长期未解决的难题。为了提高混凝土的抗裂性能,工程界在材料、设计和施工方面进行了锐意的研究。补偿收缩混凝土是一种适度膨胀的混凝土。当它膨胀时,混凝土中的钢筋对它的膨胀产生限制作用,钢筋本身也因与混凝土一起膨胀而产生拉应力,同时对混凝土产生相应的压应力。这种压应力能够抵消导致混凝土开裂的全部或大部分拉应力,从而避免或大大减轻混凝土的开裂。我院吴中伟总工程师指出:补偿收缩混凝土是一种具有很大发展前途的 I. INTRODUCTION Cracking of concrete is a long-standing unsolved problem. In order to improve the crack resistance of concrete, the engineering community has conducted intensive research on materials, design, and construction. The compensated shrinkage concrete is a moderately expanded concrete. When it expands, the reinforcement in the concrete has a limit to its expansion, and the steel itself also generates tensile stress due to expansion with the concrete, and at the same time produces a corresponding compressive stress on the concrete. This compressive stress can offset all or most of the tensile stress that causes the concrete to crack, thereby avoiding or greatly reducing the cracking of the concrete. The Chief Engineer Wu Zhongwei of our institute pointed out that compensating shrinkage concrete is a kind of promising development.