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对大体积混凝土裂缝的控制，下列叙述正确的有（)。A．优先选用低水化热的矿渣水泥拌制混凝土，并适

对大体积混凝土裂缝的控制，下列叙述正确的有()。

A．优先选用低水化热的矿渣水泥拌制混凝土，并适当使用速凝减水剂

B．在保证混凝土设计强度等级前提下，适当提高水灰比，增加水泥用量

C．降低混凝土的人模温度，控制混凝土内外的温差(当设计无要求时，控制在25℃以内)。如降低拌和水温度(拌和水中加冰屑或用地下水)；骨料用水冲洗降温，避免暴晒

D．及时对混凝土覆盖保温、保湿材料，并进行养护

E．可预埋冷却水管，通入循环水将混凝土内部热量带出，进行人工导热

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