Reuse of de-inking sludge from wastepaper recycling in cement mortar products.
Reuse of de-inking sludge from wastepaper recycling in cement mortar products.
复制标题
废纸回收脱墨污泥在水泥砂浆产品中的再利用。
DOI：
10.1016/j.jenvman.2011.03.028
复制
发表时间：
2011
影响因子：
8.7
通讯作者：
G. Shapiro
中科院分区：
文献类型：
--
作者：
Shiqin Yan;K. Sagoe;G. Shapiro
本文介绍了一个调查结果的使用脱墨污泥从造纸回收厂作为原料在水泥砂浆产品的制造，包括砌块和砂浆呈现。研究了不同脱墨污泥掺量对砂浆物理力学性能的影响。据观察，在固定的水灰比下，将脱墨污泥添加到水泥砂浆中显著降低了流动性能并增加了凝固时间。随着脱墨污泥掺量的增加，水泥砂浆的吸水率和透水孔隙体积增大，体积密度相应减小。91天的抗压强度的砂浆样品与2.5wt%和20wt%的脱墨污泥负荷分别保留83%和62%的参考砂浆强度。与参考样品相比，相应的干燥收缩率增加高达160%。然而，高达2.5wt%的脱墨污泥负荷没有显着改变测量的物理和机械性能。结果表明，尽管脱墨污泥因其有机质和残留纤维素纤维含量而具有高吸湿性，但它可作为潜在的补充添加剂，并且其纤维素含量被证明是水泥砌体产品的活性凝固阻滞剂。
This paper presents results of an investigation into the use of de-inking sludge from a paper recycling mill as feedstock material in the manufacture of cement mortar products, including masonry blocks and mortar renders. Both physical and mechanical properties of mortar specimens containing various amounts of de-inking sludge were investigated. It was observed that the addition of de-inking sludge to cement mortar at a fixed water-to-cement ratio significantly reduced flow properties and increased setting time. Water absorption and volume of permeable voids of cement mortar increased with increased dosage of de-inking sludge, with a corresponding reduction of bulk density. The 91-day compressive strength of mortar samples with 2.5 wt% and 20 wt% de-inking sludge loadings retained 83% and 62% respectively of the reference mortar strength. The corresponding drying shrinkage increased by up to 160% compared to reference samples. However, a de-inking sludge loading of up to 2.5 wt% did not significantly alter measured physical and mechanical properties. The results demonstrate that despite the high moisture absorbance of de-inking sludge due to its organic matter and residual cellulose fibre content, it serves as a potential supplementary additive and its cellulosic content proving to be an active set retardant to cementitious masonry products.