废砂浆配料煅烧水泥熟料的研究

利用从废弃混凝土中分离出来的废砂浆作为原料煅烧出了3种典型的水泥熟料,并对水泥熟料矿物组成和水泥物理性能、抗压强度、水化产物微观结构等进行了测试;对煅烧机理也进行了探讨.结果表明:利用废砂浆作为水泥配料煅烧的水泥,完全能够满足硅酸盐水泥标准的各项性能要求,具有节能和节省原料的特点,有益于废弃混凝土的循环利用和水泥工业的可持续发展.

Use of Waste Mortar as Calcined Clinker of Cement

Mortars separated from the waste concrete were used to produce Portland cements, which were the high alite cement(HAC),the ordinary Portland cement(OPC) and the high belite cement(HBC) respectively.The mass of free CaO was determined by glycol method and the mineral compositions of clinkers were affirmed by X-ray diffraction(XRD).The setting time,volume stability,specific surface area,compressive strength and the image of the hydration of the three kinds cement were tested.The mechanism of production of cement from waste mortar was proposed.The test result show that,compared to the reference cement,the three cements produced from waste mortar can meet the standard for portland cement.In addition,the method can save resource and energy in the produce process.