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社会经济日新月异的发展,为建筑行业带来了全新的发展形势,建筑工程日渐规模化,复杂化,设计也日益科学,为大体积混凝土应用创造了良好条件。大体积混凝土由于具备材料来源广泛、成本较低、性能优良的优势,在民生、工业等各个领域的基础建设中得到了广泛应用。然而由于大体积混凝土导热性能较差而浇筑体积大,在复杂的施工条件影响下,会在内部产生较大的温度应力,再加之其他外界环境因素作用,很容易产生温度裂缝,导致其结构强度降低。本文详细阐述了大体积混凝土裂缝的类型及温度应力的形成机理,分析温度裂缝的成因,以期为混凝土施工中的防裂提供参考。
With the rapid development of social economy, the construction industry has brought a brand new development situation. Construction engineering has become increasingly large-scale and complicated, and its design has become increasingly scientific. This has created favorable conditions for the mass concrete application. Massive concrete has been widely used in the infrastructure of people’s livelihood, industry and other fields due to its advantages of wide sources of raw materials, low cost and excellent performance. However, due to poor thermal conductivity of large volume concrete pouring volume, under the influence of complex construction conditions, there will be greater internal temperature stress, coupled with other external environmental factors, it is easy to produce temperature cracks, leading to structural strength reduce. This paper elaborates the types of large-volume concrete cracks and the formation mechanism of temperature stress, and analyzes the causes of temperature cracks in order to provide reference for crack prevention in concrete construction.