This research centres its attention on the valorisation of incinerator bottom ash derived from municipal solid waste with the aim of producing compressed stabilised earth blocks. Compressed stabilised earth blocks is prepared with 6–12% cement and 10–40% MSWIBA, whose performance is assessed in terms of strength and durability. This includes several properties of compressed stabilised earth blocks, including dry compressive strength, flexural strength, tensile strength, water absorption, wetting-drying cycle, ultrasonic pulse velocity and acid attack. The findings indicate that the inclusion of municipal solid waste incinerator bottom ash as a 20% replacement of soil enhances the compressive strength and ultrasonic pulse velocity of the blocks. Nevertheless, the excessive use of municipal solid waste incinerator bottom ash (beyond 20%) results in an augment of void content and a reduction in compressive strength. The results of the study suggest that the usage of municipal solid waste incinerator bottom ash in the blocks leads to the enhancement of their aesthetic qualities. The study employing scanning electron microscopy indicates an excessive quantity of ettringite crystals in the samples derived from ash of quantity beyond 20%. This is because these samples have higher porosity, which enables the acidic medium to penetrate samples easily and react with the cement hydration products. Hence, though showing less discolouration on the surface, these samples show a significant reduction of compressive strength at the end of the testing regime. Similar results were obtained for the wetting and drying test as well. Therefore, this study recommends a maximum usage of 20% municipal solid waste incinerator bottom ash as a replacement for soil.

中文翻译：

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用于生产压缩稳定土块的城市固体废物焚烧炉底灰的增值

这项研究的重点是来自城市固体废物的焚烧炉底灰的价值，旨在生产压缩稳定土块。压缩稳定土块由 6-12% 水泥和 10-40% MSWIBA 配制而成，其性能根据强度和耐久性进行评估。这包括压缩稳定土块的几个特性，包括干抗压强度、抗弯强度、抗拉强度、吸水率、干湿循环、超声波脉冲速度和酸侵蚀。研究结果表明，将城市固体废物焚烧炉底灰作为土壤的 20% 替代品，可以提高砌块的抗压强度和超声波脉冲速度。然而，城市固体垃圾焚烧炉底灰的过量使用（超过20%）会导致空隙率增加和抗压强度降低。研究结果表明，在砌块中使用城市固体垃圾焚烧炉底灰可以提高其美学品质。采用扫描电子显微镜的研究表明，来自灰分的样品中钙矾石晶体的含量超过 20%。这是因为这些样品具有较高的孔隙率，这使得酸性介质很容易渗透样品并与水泥水化产物发生反应。因此，尽管表面变色较少，但这些样品在测试结束时表现出抗压强度显着降低。润湿和干燥测试也获得了类似的结果。因此，本研究建议最多使用20%的城市固体废物焚烧炉底灰来替代土壤。