Eco-trench: a novel trench solution based on reusing excavated material and a finishing layer of expansive concrete

IF 1.1 4区 工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY
A. Blanco, P. Pujadas, Cristina Fernández, S. Cavalaro, A. Aguado
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引用次数: 2

Abstract

Installing utility pipelines generates a significant amount of trench arisings, which are usually transported to landfills instead of being reused as backfill material. This practice generates CO 2 emissions and wastes raw materials. This paper presents a more sustainable solution, an eco-trench, which is based on re-using trench arisings as backfill and adding a top layer of expansive concrete to improve the eco-trench’s structural performance. The technical feasibility of the eco-trench was evaluated through a finite element model, which identified the degree of expansion in concrete required to avoid failure or subside the stresses caused by traffic. The potential expansion of concrete was measured under confined conditions in the laboratory by means of a novel test developed for this purpose. The results showed that adding calcium oxide generates the required internal stress. The results were then confirmed in a pilot experience.
生态沟:一种基于重复利用挖掘材料和膨胀混凝土饰面层的新型沟渠解决方案
安装公用工程管道会产生大量的沟槽,这些沟槽通常被运到垃圾填埋场,而不是重新用作回填材料。这种做法会产生二氧化碳排放并浪费原材料。本文提出了一种更可持续的解决方案,即生态沟渠,该解决方案基于将沟渠重新用作回填土,并添加一层膨胀混凝土顶层来提高生态沟渠的结构性能。通过有限元模型评估了生态沟渠的技术可行性,该模型确定了避免交通造成的破坏或应力消退所需的混凝土膨胀程度。通过为此目的开发的一种新的测试方法,在实验室中测量了混凝土在受限条件下的潜在膨胀。结果表明,添加氧化钙会产生所需的内应力。试验结果随后得到了证实。
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来源期刊
Materiales de Construccion
Materiales de Construccion 工程技术-材料科学:综合
CiteScore
3.20
自引率
9.50%
发文量
38
审稿时长
>12 weeks
期刊介绍: Materiales de Construcción is a quarterly, scientific Journal published in English, intended for researchers, plant technicians and other professionals engaged in the area of Construction, Materials Science and Technology. Scientific articles focus mainly on: - Physics and chemistry of the formation of cement and other binders. - Cement and concrete. Components (aggregate, admixtures, additions and similar). Behaviour and properties. - Durability and corrosion of other construction materials. - Restoration and conservation of the materials in heritage monuments. - Weathering and the deterioration of construction materials. - Use of industrial waste and by-products in construction. - Manufacture and properties of other construction materials, such as: gypsum/plaster, lime%2
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