利用工业废渣生产多微孔胶凝材料的研究

以粉煤灰、电石渣和脱硫石膏为主要原料，掺加少量矿化剂、黏结剂和造孔剂，采用一次低温烧成工艺，制备出具有多微孔结构的新型无机胶凝材料，并对产品性能进行了研究。采用优化配方，在预热温度为400 ℃、焙烧温度为1 220 ℃、保温时间为25 min条件下制备的多微孔胶凝材料，其吸水率为2.10%、表观密度为1.32 g/cm³，3 d抗压强度为8.56 MPa。通过XRD分析可知，合成材料的主要矿物相为硅酸钙和钙铝黄长石。材料采用工业废渣制备，集多孔性和胶凝性，可部分代替水泥和陶粒制成保温砂浆，达到环保节能的目的。

Study on utilization of industrial waste residue for production of microporous cementitious materials

A new inorganic cementitious material with microporous structure was prepared by single low-temperature sintering process with fly ash,carbide slag,and desulfurization gypsum as raw materials and with adding a small amount of mineralizer,adhesive agent,and pore-forming agent and the material′s performances were also studied.Taking the optimized formula and under the conditions of pre-heat temperature 400 ℃,roasting temperature 1 220 ℃,and holding time 25 min,water absorption,apparent density,and 3 d compressive strength of the prepared microporous cementitious material were 2.10%,1.32 g/cm3,and 8.56 MPa,respectively.XRD analysis showed the main phases of synthesized material were calcium silicate and gehlenite.Using industrial waste slag as raw material as well as the combination of porosity and cementitious character made the microporous cementitious material can partially replace cement and lightweight aggregates(haydite) to prepare insulating mortar so that the purpose of environmental protection and energy saving could be realized.