自然变负温养护和标准养护下混凝土强度试验研究

Test Research on Compressive Strength of Concrete under Outdoor Varied Negative Temperature Curing and Standard Condition Curing

制作同一配合比(掺加防冻防水剂)的混凝土试块,分别在标准条件下和自然变负温条件下养护1d、3d、7d、14d、28d,测定其抗压强度。试验表明,自然变负温条件和标准条件相比,其1d强度相差不大;3d、7d、14d、28d强度略低,且28d强度均满足C35抗压强度的要求。

To make the test cube of C35 concrete, these test cubes has same mix proportions of concrete （mixed with antifreeze waterproofing agent）. Test cubes had maintenance on standard conditions and natural negative temperature conditions, curing period respectively was ld, 3d, 7d, 14d, 28d, then measure its compressive strength. Test shows that compressive strength of ld was similar on standard conditions and natural negative temperature conditions, compressive strength of 3d,7d,14d,28d on standard conditions shghtly lower than natural negative temperature conditions, and both the compressive strength of the 28d meet the C35 requirements.