蒸压陶粒轻骨料混凝土的力学性能研究

Research on mechanical properties of autoclaved lightweight aggregate concrete

为探究蒸压陶粒轻骨料混凝土中的力学性能,研究了蒸压陶粒轻骨料混凝土在不同水灰比条件下的干表观密度、抗压强度、劈裂抗拉强度和超声波声速。结果发现:蒸压陶粒轻骨料陶粒混凝土的干表观密度为1855~1988kg/m^(3)之间,蒸压陶粒轻骨料混凝土在1d、3d和7d的强度分别是28d强度的37%~66%、73%~76%和84%~92%。劈裂抗拉强度满足结构混凝土的要求。陶粒混凝土1d、3d和7d的抗压强度与28d强度具有良好的线性关系,28d劈裂抗拉强度与28d抗压强度有良好的指数关系,陶粒混凝土的强度与超声波声速存在较强的指数关系。该研究成果将为蒸压陶粒在混凝土中的应用提供技术支撑。

In order to study the mechanical properties of autoclaved ceramic lightweight aggregate concrete,the dry apparent density,compressive strength,splitting tensile strength,and ultrasonic velocity of autoclaved lightweight aggregate concrete under different water cement ratios were studied.The results showed that the dry apparent density of autoclaved lightweight aggregate concrete ranged from 1855 to 1988 kg/m^(3),and the strength of autoclaved lightweight aggregate concrete at 1d,3d,and 7d was 37%~66%,73%~76%,and 84%~92%of the 28d strength,respectively.The splitting tensile strength meets the requirements of structural concrete.The compressive strength of concrete at 1d,3d,and 7d has a good linear relationship with its 28d strength,and the splitting tensile strength at 28d has a good exponential relationship with its 28d compressive strength.The strength of concrete has a strong exponential relationship with the speed of ultrasonic velocity.The research results will provide technical support for the application of autoclaved ceramic granules in concrete.