中文摘要：

为了揭示水胶比、河砂和碎石体积取代率对半轻页岩陶粒混凝土的物理力学性能影响规律,进行了水胶比分别为0.30、0.35、0.40,河砂取代率分别为5%、10%、15%,碎石取代率分别为5%、10%、15%、20%、25%、30%时的相互交叉试验。结果表明：在水胶比为0.35、河砂取代率为10%、碎石取代率为25%时,半轻混凝土的各项物理力学性能指标达到最优;抗折强度与抗压强度、折压比与抗折强度、干表观密度和比强度与抗压强度之间,均存在强相关关系;但干表观密度和比强度与抗压强度之间的关系,敏感于抗压强度的变化;通过普通骨料对部分轻骨料的同时取代,不仅能保证混凝土的干表观密度小于1 950 kg/m3的技术要求,而且还能克服全轻混凝土的技术缺陷,以及降低工程成本。

英文摘要：

A serial of intercross tests were achieved in order to demonstrate the change rules of physical-mechanical performances （PMPs） for semi-lightweight shale ceramsite concrete（ SLWSCC, called SLWC ） based on the parameters change of water-to-binder（W/B ） ratio by weight,volumetric substitute rates of normal-weight coarse aggregate（Sa） and sand（Ss） ,which is 0.30,0.35,0.40 by W/B, 5%, 10%o, 15% by Ss, 5%, 10%, 15%, 20%, 25%, 30% by Sa, respectively.The results show the PMP indexes are the best when W/B is 0.35, Ss is 10% and Sa is 25%.It is a stronger correlation between the variables of compressive strength（CS ） and bending strength（BS ）, BS-to-CS ratio and BS ,dry apparent density（DAD） and CS,speeific strength （SS,CS-to-DAD ratio） and CS,respectively.But the relationships are sensitive to the change of CS between DAD and CS, SS and CS.The SLWC can not only satify DAD 〈1 950 kg/m3, but also overcome common quality problems of all-lightweight concrete（ALWC ） and lower engineering cost.