低温下大体积高强混凝土裂缝成因分析与控制

大体积混凝土施工中,水泥水化引起混凝土内部温度变化以及外界约束条件是导致混凝土产生裂缝的主要原因。尤其在矿井建设中,裂缝将会影响混凝土的整体性、防水性和耐久性。因此如何控制混凝土裂缝是井壁混凝土施工技术的关键。结合工程实际和现场实测,对低温条件下大体积高强混凝土裂缝成因进行分析,并提出相应的措施。

Analysis and control of large volume high strength concrete crack in low temperature

During the casting of large volume concrete, the change of internal temperature in concrete resulted from hydration of cement and bounding constraint mainly lead to cracks of concrete. The cracks will affect concrete characters such as waterproofness,wear and whole, especially the construction of mine shafts. Thus, How to control the cracks is the key to concrete construction.Based on construction practice and measuration locale, the paper analyses the cracks and gives relative measures in low temperature.