论文部分内容阅读
以建筑陶瓷废渣为主要原料制备硅酸盐蒸压砖,探讨了骨料和石灰掺量、成型压力和成型用水量对制品性能的影响,通过正交试验确定了原料最佳配合比,利用XRD、SEM和EDS研究了制品强度的形成机理。结果表明,物料配比、成型用水量及成型压力皆对制品性能有一定的影响,按m(陶瓷废渣粉)∶m(石灰)∶m(骨料)∶m(引晶剂)∶m(水玻璃)=50∶15∶33∶2∶0.5配料,加18%水搅拌均匀,25 MPa下压制成型,饱和蒸汽1.2 MPa下恒温6 h制备而成的蒸压砖,其抗压强度达44.5 MPa;原料中的SiO_2与CaO水热反应生成托贝莫来石、CSH(B)和C-S-H凝胶等水化物,包覆在固体颗粒表面或填充在颗粒之间,相互交织连接形成了坚实的胶结体,由此构成了材料的整体强度。
Taking the ceramic waste residue as the main raw material, silicate autoclaved brick was prepared. The effects of aggregate and lime dosage, molding pressure and forming water on product properties were discussed. The optimum blending ratio of raw materials was determined by orthogonal test. SEM and EDS studied the formation mechanism of product strength. The results showed that the ratio of materials, molding water and forming pressure all had some influence on the properties of the products. According to m (ceramic waste powder): m (lime): m (aggregate): m Water glass) = 50:15:33:2:0.5 ingredients, add 18% water Stir, 25 MPa under pressure molding, saturated steam at 1.2 MPa constant temperature 6 h prepared autoclaved brick, the compressive strength of 44.5 MPa; Hydrothermal reaction of SiO 2 and CaO in the raw materials to produce tobecome-mullite, CSH (B) and CSH gel, coated on the surface of solid particles or filled between the particles and interweaved to form a solid The cement body thus constitutes the overall strength of the material.