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一、低温早强混凝土是在天气严寒的冬季施工中,于普通混凝土内掺入少量的氯化钙和氯化钠,并采用热拌合物灌筑和一定的保温措施,使新灌筑的混凝土在初期保持短时的正温硬化,有利于混凝土早强。然后可以在一定范围的负温条件下继续硬化并获得抗冻强度。此后允许混凝土温度自然下降。二、适用范围:由于混凝土内掺有氯盐不能用于钢筋混凝土结构。为了便于蓄热保温,一般比较适用于体积较大或保温较易的无钢筋的混凝土结构。
First, the low-temperature early-strength concrete is used in the cold winter construction. It mixes a small amount of calcium chloride and sodium chloride in the ordinary concrete, and uses the hot mixture to pour and certain insulation measures, so that the newly built The concrete hardens at a short time at the early stage, which is beneficial to early strength of the concrete. It is then possible to continue the hardening under a range of negative temperature conditions and obtain antifreeze strength. After that, the temperature of the concrete is naturally allowed to fall. Second, the scope of application: Because the concrete mixed with chloride salt can not be used for reinforced concrete structures. In order to facilitate regenerative heat preservation, it is generally suitable for concrete structures without bulk reinforcement that are bulky or easy to maintain.