矿渣微粉与珍珠岩尾矿复合对免烧陶粒性能的影响

Influence of Combination of Fine Slag Powder and Perlite Tailings on Performance of Non-Sintered Ceramsite

以珍珠岩尾矿、粒化高炉矿渣微粉、水玻璃为原材料研制无熟料免烧陶粒。以水玻璃作为激发剂,探究其模数和掺量对矿渣微粉强度的影响,研究矿渣微粉与珍珠岩尾矿粉复合对陶粒筒压强度和堆积密度的影响。结果表明:当矿渣微粉、水玻璃质量比为90∶10,水玻璃最佳模数为1.06,矿渣微粉、珍珠岩尾矿质量比为90∶10时,可以使陶粒标养28 d达到筒压强度为7.50 MPa,密度等级为900 kg/m^(3),孔隙率为31.84%,软化系数为0.92,含泥量为2.25%,煮沸质量损失为2.84%;对陶粒表面进行防水处理后,吸水率由11.68%降到4.88%。采用陶粒配制LC30轻集料混凝土进行道路窨井周围道路基层应用,其28 d抗压强度为35.5 MPa,密度等级为1700 kg/m^(3),压缩系数为0.001,应用效果良好,防止了城市道路窨井沉陷。

This paper revolves around the research and production of non-clinker and non-sintered ceramsite with perlite tailings,granulated blast furnace fine slag powder,and water glass as raw materials.The combined influence of the modulus and content of water glass on the intensity of fine slag powder with sodium silicate as activator,and the effect of the combination of fine slag powder and perlite tailings powder on the compressive strength and bulk density of ceramsite cylinders were explored.The results show that when the mass ratio of slag powder to water glass is 90∶10,the best modulus of water glass is 1.06,and the mass ratio of slag powder to perlite tailings is 90∶10,the ceramsite can reach a technical performance on a 28 d standard maintenance that compressive strength of cylinder is 7.50 MPa,the density grade is 900 kg/m^(3),the porosity is 31.84%,the softening coefficient is 0.92,the mud content is 2.25%,and the boiling mass loss is 2.84%.Besides,after water proof treatment on the surface of the ceramsite,reducing the water absorption rate decreases from 11.68%to 4.88%.The ceramsite is used to prepare LC30 lightweight aggregate concrete for the application of the road base around manholes.The 28 d compressive strength is 35.5 MPa,the density grade is 1700 kg/m^(3),and the compression coefficient is 0.001.The application presents a satisfying result,preventing the sinking of the urban road manholes.