The potential of using water purification wastes as fine aggregates in concrete mixes: an initial study

IF 1.6 Q3 ENGINEERING, CIVIL Australian Journal of Civil Engineering Pub Date : 2020-10-21 DOI:10.1080/14488353.2020.1835148
A. Alzoubi, D. Ghunimat, M. Al-Rawashdeh, Shadi Hanandeh
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引用次数: 3

Abstract

ABSTRACT The large quantities of wastes resulting from water purification process (known as sludge) are increasingly becoming a big concern at some of developing countries, where no proper disposal options are available. The traditional practices of sludge disposal through dumping in landfills have become an ecological, environmental and financial burden. This is due to the daily operation, limited capacity of landfills, and negative impacts on soil, climate, surface and ground water. Hence, the goal of this research is to investigate the possibility of using incinerated sludge produced from water purification plants in construction field, and analyzing its effect on mechanical properties of concrete as one of sludge management options. Sludge was incinerated at a temperature of 800°C for two hours, grinded, sieved and replaced by fine aggregate at percentages of 5%, 10%, 15%, and 20% in concrete mixes. XRD and XRF tests were performed to identify crystalline phases and chemical composition of the sludge. The effect of using the incinerated sludge on workability, density, compressive and flexural strengths of concrete at curing ages of 7, and 28 days was investigated. The results showed a significant improvement in compressive and flexural strengths for all samples containing sludge for both curing ages in comparison to control samples, while a reduction in workability was observed.
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在混凝土混合料中使用净水废物作为细骨料的潜力:初步研究
摘要:在一些发展中国家,由于没有合适的处理方案,水净化过程中产生的大量废物(称为污泥)正日益成为人们关注的焦点。通过垃圾填埋场倾倒污泥的传统做法已成为生态、环境和财政负担。这是由于垃圾填埋场的日常运营、容量有限以及对土壤、气候、地表水和地下水的负面影响。因此,本研究的目的是研究在建筑领域使用净水厂产生的焚烧污泥的可能性,并分析其对混凝土力学性能的影响,作为污泥管理的选择之一。污泥在800°C的温度下焚烧两小时,研磨、筛分,并用混凝土混合物中5%、10%、15%和20%的细骨料代替。进行XRD和XRF测试以鉴定污泥的结晶相和化学成分。研究了焚烧后的污泥在养护7天和28天时对混凝土工作性能、密度、抗压强度和抗弯强度的影响。结果表明,与对照样品相比,所有含有污泥的样品在两个养护龄期的抗压强度和抗弯强度都有显著提高,同时观察到工作性降低。
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来源期刊
CiteScore
3.90
自引率
7.70%
发文量
31
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