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首页> 美国卫生研究院文献>Materials >Strength Characteristics of Controlled Low-Strength Materials with Waste Paper Sludge Ash (WPSA) for Prevention of Sewage Pipe Damage
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Strength Characteristics of Controlled Low-Strength Materials with Waste Paper Sludge Ash (WPSA) for Prevention of Sewage Pipe Damage

机译：废纸污泥灰（WPSA）控制低强度材料的强度特性防止污水管损伤

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摘要

In this study, the effects of the mixing conditions of waste paper sludge ash (WPSA) on the strength and bearing capacity of controlled low-strength material (CLSM) were evaluated, and the optimal mixing conditions were used to evaluate the strength characteristics of CLSM with recyclable WPSA. The strength and bearing capacity of CLSM with WPSA were evaluated using unconfined compressive strength tests and plate bearing tests, respectively. The unconfined compressive strength test results show that the optimal mixing conditions for securing 0.8–1.2 MPa of target strength under 5% of cement content conditions can be obtained when both WPSA and fly ash are used. This is because WPSA and fly ash, which act as binders, have a significant impact on overall strength when the cement content is low. The bearing capacity of weathered soil increased from 550 to 575 kPa over time, and CLSM with WPSA increased significantly, from 560 to 730 kPa. This means that the bearing capacity of CLSM with WPSA was 2.0% higher than that of weathered soil immediately after construction; furthermore, it was 27% higher at 60 days of age. In addition, the allowable bearing capacity of CLSM corresponding to the optimal mixing conditions was evaluated, and it was found that this value increased by 30.4% until 60 days of age. This increase rate was 6.7 times larger than that of weathered soil (4.5%). Therefore, based on the allowable bearing capacity calculation results, CLSM with WPSA was applied as a sewage pipe backfill material. It was found that CLSM with WPSA performed better as backfill and was more stable than soil immediately after construction. The results of this study confirm that CLSM with WPSA can be utilized as sewage pipe backfill material.
机译：在该研究中，评估废纸污泥灰分（WPSA）对受控低强度材料（CLSM）强度和承载力的影响，并使用最佳混合条件来评估CLSM的强度特性与可回收的WPSA。使用非整齐的压缩强度试验和板式轴承测试评估CLSM与WPSA的强度和承载力。无凝结的压缩强度试验结果表明，当使用WPSA和粉煤灰时，可以获得在5％的水泥含量条件下固定0.8-1.2MPa的最佳混合条件。这是因为当水泥含量低时，粘合剂和粉煤灰充当粘合剂时对整体强度产生重大影响。随着时间的推移，风化土壤的承载力从550增加到575 kPa，并且Clsm与WPSA显着增加，从560到730 KPA增加。这意味着CLSM与WPSA的承载力比在施工后立即高于风化土壤的2.0％;此外，60天的年龄较高27％。此外，评估了CLSM的允许承载能力，对应于最佳混合条件，发现该值增加了30.4％直至60天。这种增加的速度比风化土壤的增加6.7倍（4.5％）。因此，基于允许的承载能力计算结果，用WPSA的CLSM用作污水管回填材料。结果发现，具有WPSA的CLSM表现出更好的回填，施工后立即比土壤更稳定。本研究的结果证实，具有WPSA的CLSM可以用作污水管回填材料。

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