比较重的膨胀矿碴与较轻的珍珠岩砂(它具有不同的变形特性、较低的强度以及较高的吸水性)在混凝土中的组合很大程度上决定了轻混凝土的性能、混凝土浆制作及构件成型特点及其适用范围。制作大板轻混凝土用的膨胀矿碴粒径达20毫米,松散容重800～850公斤/米~3,其中级配为10～20毫米有55%,而5～10毫米的有45%,混合料的粒间空隙率为52%,膨胀矿碴的吸水率为1小时12%,48小时18%。粒径为10～20毫米的强度(在 The combination of the heavier sweller and the lighter pearlite (which has different deformation characteristics, lower strength, and higher water absorption) in the concrete largely determines the performance of the lightweight concrete, concrete slurry Production and component molding characteristics and application scope. The size of the expanded ore for making slab concrete is 20 mm, the bulk density is 800-850 kg/m3, and the gradation is 5-20 % for 10-20 mm, and 45% for 5-10 mm. The intergranular void ratio of the material was 52%, and the water absorption rate of the swelling ore was 12% for 1 hour and 18% for 48 hours. The strength of the particle size is 10-20 mm (in