【摘要】 研究了粉煤灰掺量和体积砂率对用煤矸石陶粒和陶砂作为骨料配制的轻骨料混凝土抗压强度和干表观密度的影响,测试了不同强度等级下轻骨料混凝土可以达到的最小干密度及相应的热导系数。结果表明:煤矸石陶粒混凝土的抗压强度和干密度均随着粉煤灰掺量的增加先增大后减小,当粉煤灰掺量为20%时抗压强度和干密度最高;而随体积砂率减小,抗压强度和干密度逐渐减小,满足LC10、LC15和LC20强度等级的最小干密度分别为1145、1220和1297 kg/m~3,对应的导热系数分别为0.1941、0.2050、0.2341 W/(m·K)。更多还原

【Abstract】 The influence of dosage of fly ash and volume sand ratio to the compressive strength and dry density of lightweight aggregate concrete(LWAC) which was prepared with coal gangue ceramsite and ceramic sand as lightweight aggregate were studied.And the minimum level of density and the corresponding thermal conductivity that LWAC can achieve under different strength grades were explored. The results show that:with the increase of dosage of fly ash,both the compressive strength and the dry apparent density of LWAC increases first and then decreases,and the best dosage of fly ash is 20%;But with the decrease of volume rate of sand,both of them decrease gradually. The minimum dry density grade under strength grade of LC10,LC15 and LC20 is1145,1220 and 1297 kg/m~3 respectively. And their thermal conductivity are 0.1941,0.2050 and 0.2341 W/(m·K).更多还原