轻质碱渣-氯氧镁水泥基材料性能研究及孔结构特征分析

Experimental Study on Properties and Pore Structure Characteristics of Light Alkali Residue-magnesium Oxychloride Cement-based Materials

以碱渣、MgO、MgSO_(4)·7H_(2)O等为主要原材料,制备了轻质碱渣-氯氧镁水泥基材料,研究了养护温度、发泡剂掺量、稳泡剂掺量对轻质碱渣-氯氧镁水泥基材料性能的影响,并对其孔结构进行了分析。结果表明:当养护温度为60℃、发泡剂掺量为5%、稳泡剂掺量为6%时,轻质碱渣-氯氧镁水泥基材料的各项性能最优,干密度为597 kg/m^(3)、抗压强度为2.7 MPa、导热系数为0.21 W/(m·K)、吸水率为15.1%、软化系数为0.83、28 d收缩率为0.17%。

Light alkali residue-magnesium oxychloride cement-based materials were prepared with alkali residue,magnesium oxide and magnesium sulfate heptahydrate as the main raw materials.The effects of curing temperature,foaming agent content and foam stabilizer content on the properties of light alkali residue-magnesium oxychloride cement-based materials were studied,and the pore structure was analyzed.The results show that when the curing temperature is 60℃,the content of foaming agent is 5%and the content of foam stabilizer is 6%,the properties of light alkali residue-magnesium oxychloride cement-based materials are the best,with dry density of 597 kg/m^(3),compressive strength of 2.7 MPa,thermal conductivity of 0.21 W/(m·K),water absorption of 15.1%,softening coefficient of 0.83 and 28 d shrinkage rate of 0.17%.