Stabilizing a silt using waste limestone powder

IF 3.7 2区工程技术 Q3 ENGINEERING, ENVIRONMENTAL Bulletin of Engineering Geology and the Environment Pub Date : 2023-07-10 DOI:10.1007/s10064-023-03302-4

Ali Firat Cabalar, Rizgar Abdulrahman Omar

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引用次数: 1

Abstract

Limestone powder produced by mechanical crushing of quarried rocks to usable sizes is a by-product, which has been studied as an alternative additive material for stabilising mechanical behaviour of a low plastic silt. Use of such application can reduce the amount of waste limestone powder, thereby reducing the environmental impact from disposal into landfills. The low plastic silt mixed by adding 0%, 5%, 10%, 20%, 30%, 40%, and 50% of dry limestone powder has been characterized by means of various laboratory tests, including fall cone, unconfined compressive strength (UCS), California Bearing Ratio, and one-dimensional consolidation test. The testing results indicated a substantial decrease in Atterberg’s limits, increment in strength, and a decrease of its deformability with limestone powder addition in the silt. The specimens tested in UCS were cured for 0, 7, 14, and 28 days. This results in a reduction of about 25% in thickness of flexible pavement with limestone powder treated subbase layers. Evidently, the optimum content of limestone powder used appears to be about 30% of the total powder content in mixtures tested.

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用废石灰石粉稳定淤泥

石灰石粉是由采石机械破碎到可用尺寸的副产品，已被研究作为稳定低塑性淤泥力学行为的替代添加剂材料。使用该应用程序可以减少废石灰石粉的数量，从而减少处置到堆填区对环境的影响。对掺加0%、5%、10%、20%、30%、40%、50%干石灰粉的低塑性粉土进行了落锥试验、无侧限抗压强度试验、加州承载比试验和一维固结试验。试验结果表明，在粉土中加入石灰石粉，可显著降低粉土的阿特伯格极限，提高粉土的强度，降低粉土的变形能力。在UCS测试的标本分别固化0、7、14和28天。这使得石灰石粉处理下层的柔性路面厚度减少了约25%。显然，石灰石粉的最佳含量似乎是在混合物中总粉含量的30%左右。

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来源期刊

Bulletin of Engineering Geology and the Environment 工程技术-地球科学综合

CiteScore

7.10

自引率

11.90%

发文量

445

审稿时长

4.1 months

期刊介绍： Engineering geology is defined in the statutes of the IAEG as the science devoted to the investigation, study and solution of engineering and environmental problems which may arise as the result of the interaction between geology and the works or activities of man, as well as of the prediction of and development of measures for the prevention or remediation of geological hazards. Engineering geology embraces: • the applications/implications of the geomorphology, structural geology, and hydrogeological conditions of geological formations; • the characterisation of the mineralogical, physico-geomechanical, chemical and hydraulic properties of all earth materials involved in construction, resource recovery and environmental change; • the assessment of the mechanical and hydrological behaviour of soil and rock masses; • the prediction of changes to the above properties with time; • the determination of the parameters to be considered in the stability analysis of engineering works and earth masses.