稳定疏浚土- eps轻质模块化块体(LMB)单元强度特性研究

Q3 Engineering

Open Civil Engineering Journal Pub Date : 2023-03-01 DOI:10.28991/cej-2023-09-03-014

Nurul Marfuah, T. Harianto, A. B. Muhiddin, R. Irmawaty

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引用次数: 1

摘要

几十年来，轻质材料的应用得到了广泛的研究。用EPS微珠或轻质土工材料改造各种类型的土壤，是现场施工的一种替代材料，可以减少过大变形和侧向压力等过度问题。本研究旨在研究轻质土工材料，即轻质模块化砌块/LMB的强度特性。LMB由EPS微珠、疏浚土和水泥组成。水泥掺量分别为3%、5%、7%和9%，EPS随掺量的变化幅度分别为0.5%和0.75%。在室内进行了无侧限压缩和不排水直剪试验。试验前采用单层静压法制作试件，分别固化7、14、28天。本文还通过提供初步的试验结果，对三层法和单层法的有效性进行了比较，给出了有关试样制作和处理的说明。并对防止开裂的养护措施进行了明确的说明。结果表明，水泥掺量的增加与养护时间的延长对强度参数的增加呈线性关系。EPS的加入降低了强度，但水泥的加入有助于提高强度参数，在C7%和C9%时达到显著值。EPS用量的增加也使混合物的密度降低了18%-29%。Doi: 10.28991/CEJ-2023-09-03-014全文:PDF

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Strength Characteristic of Lightweight Modular Block (LMB) Element using Stabilized Dredged Soil-EPS

For several decades, lightweight material applications have been extensively studied. Modifying various types of soil with EPS beads or lightweight geomaterials is an alternative construction material on site that can reduce excessive problems such as large deformation and lateral pressure. This study aims to examine the strength characteristics of lightweight geomaterials, namely lightweight modular block/LMB. LMB is composed of EPS beads, dredged soil, and cement. The cement amounts are 3%, 5%, 7%, and 9%, with EPS variations of 0.5% and 0.75% to the mixture weight. Laboratory tests were conducted to investigate the strength with unconfined compression and undrained direct shear tests. Before testing, the specimens were made using the one-layer static compaction method and were cured for 7, 14, and 28 days. This paper also presents explanations related to the specimens making and treatment by providing preliminary test results to compare the effectiveness of the three-layer and one-layer methods. Moreover, the curing treatments to avoid cracking were explained explicitly. The result shows linearity between both increasing the amount of cement and adding more curing time to the increase of the strength parameter. In contrast, adding more EPS decreased the strength, but adding cement helped increase the strength parameter with a remarkable value at C7% and C9%. Increasing the amount of EPS also reduced the density of the mixture by 18%–29%. Doi: 10.28991/CEJ-2023-09-03-014 Full Text: PDF

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来源期刊

Open Civil Engineering Journal Engineering-Civil and Structural Engineering

CiteScore

1.90

自引率

0.00%

发文量

期刊介绍： The Open Civil Engineering Journal is an Open Access online journal which publishes research, reviews/mini-reviews, letter articles and guest edited single topic issues in all areas of civil engineering. The Open Civil Engineering Journal, a peer-reviewed journal, is an important and reliable source of current information on developments in civil engineering. The topics covered in the journal include (but not limited to) concrete structures, construction materials, structural mechanics, soil mechanics, foundation engineering, offshore geotechnics, water resources, hydraulics, horology, coastal engineering, river engineering, ocean modeling, fluid-solid-structure interactions, offshore engineering, marine structures, constructional management and other civil engineering relevant areas.