利用造纸白泥及锂盐尾渣制备轻质保温墙体材料

Study on the Performance of Energy Saving Facade Materials Containing Lime Mud,Lithium Slag and Portland Cement

本实验将未经预处理含水40%左右的造纸白泥,通过复配适量的分散剂、促凝早强剂及表面活性剂等外加剂后,经80℃、12h蒸汽养护,制备了不同容重的"造纸白泥-锂渣-水泥复合发泡保温墙体材料"及对应的基体,并测试了其力学性能与热工性能。结果表明:白泥掺量达50%的复合基体,3 d抗压强度可达24.1MPa,测试结果重现性好;残碱固化效果较佳,加速测试结果未有泛霜。同容重条件下,造纸白泥和锂渣的掺入没有显著改变该体系的力学性能与保温性能,掺20%锂渣样品的28d抗压强度高于对比样;容重为600kg/m3时,二者各掺30%样品的导热系数低至0.08W/(m.K)。

The energy saving facade materials containing lime mud, lithium slag and portland cement were prepared with different bulk density, which using the lime mud that without pretreatment and adding admixture. Its mechanical and thermal properties were tested after steam curing at 80℃ to 12 h. The results show that the compressive strength of composite cementitious system containing 50% lime mud is up to 24.1 MPa when hydrated for 3 days. The frost did not appear when the testing was accelerated. Mechanical properties and thermal conductivity of the system did not significantly change when bulk density was under the same conditions, the compressive strength of the system contained 20 % lithium was better than comparison sample; the thermal conductivity was 0.08 W/（m.K） when contained 30% lime mud and 30% lithium at 600 kg/m3.