极端条件下增强绿色砂浆的机械特性:实验研究与优化分析

IF 1.7 4区 工程技术 Q3 ENGINEERING, CIVIL
Aidoud Assia, Bencheikh Messaouda, Boukour Salima, Bahloul Ouassila, Widiane Qatr Ennada Zitouni
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引用次数: 0

摘要

在公共垃圾填埋场产生的生活垃圾和类似垃圾越来越多。这些垃圾的分解需要消耗大量能源,并释放出污染空气的有害二氧化碳气体。因此,有必要采取有效措施,确保以环境可持续和经济可行的方式处置这些废物。在水泥基质中掺入不同类型的掺合料不失为一种有价值的解决方案。为此,对它们进行物理和机械特性分析,甚至将它们置于苛刻的使用条件下,是使用它们的关键步骤。这项研究旨在利用沙丘砂和采石场砂这两种类型的砂,对含有研磨咖啡废料的两种泥浆的机械性能进行表征。研究基于这些泥浆在湿润/干燥、冷冻/解冻、氯化物暴露和温度变化等极端条件下的性能。因此,在制造混合物时,用不同比例(5%、10%、15% 和 20%)的咖啡粉代替了沙子。在每种条件下循环七次后,对其机械性能进行了评估。咖啡粉的加入明显影响了泥浆的物理和机械性能,尤其是在极端条件循环后。利用方差分析(ANOVA)评估了在冻融条件下咖啡粉对泥浆的影响。响应面方法和中心复合设计模型表明,所有替代品的效果都很显著,P 值小于 5%。数值优化结果表明,用咖啡粉替代 20% 的沙子可获得最佳混合物,即使在零下 4 摄氏度的冷冻条件下也能表现出令人满意的机械性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Enhancement of the Mechanical Characteristics of a Green Mortar Under Extreme Conditions: Experimental Study and Optimization Analysis

Enhancement of the Mechanical Characteristics of a Green Mortar Under Extreme Conditions: Experimental Study and Optimization Analysis

Household and similar wastes are increasingly being produced in public landfills. Their decomposition requires very high energy consumption, releasing harmful carbon dioxide gases that pollute the air. Therefore, it is necessary to take effective measures to ensure their disposal in an environmentally sustainable and economically feasible manner. Incorporating different types of them into cement matrices can be a valuable solution. To achieve this, physical and mechanical characterization and even subjecting them to harsh conditions of use are a crucial step for their use. Such gaps include this study, which aims to characterize the mechanical properties of two types of slurry containing ground coffee waste, using two types of sand: dune and quarry sand. The research is based on how these slurries perform under extreme conditions such as wetting/drying, freezing/thawing, chloride exposure, and temperature changes. Therefore, the mixtures were manufactured by replacing sand with ground coffee in varying proportions (5%, 10%, 15%, and 20%). Mechanical properties were evaluated after seven cycles of each condition. The incorporation of ground coffee significantly affected the physical and mechanical properties of the slurry, especially after extreme conditions cycles. Using analysis of variance (ANOVA), the effect of substituting ground coffee on the slurry under freeze/thaw conditions was evaluated. Response surface methodology and central composite design models indicated significant results for all alternatives with p values less than 5%. Numerical optimization showed that replacing 20% of sand with coffee powder resulted in the best mixture, demonstrating very satisfactory mechanical performance even at freezing temperatures as low as − 4 °C.

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来源期刊
CiteScore
3.30
自引率
11.80%
发文量
203
期刊介绍: The aim of the Iranian Journal of Science and Technology is to foster the growth of scientific research among Iranian engineers and scientists and to provide a medium by means of which the fruits of these researches may be brought to the attention of the world’s civil Engineering communities. This transaction focuses on all aspects of Civil Engineering and will accept the original research contributions (previously unpublished) from all areas of established engineering disciplines. The papers may be theoretical, experimental or both. The journal publishes original papers within the broad field of civil engineering which include, but are not limited to, the following: -Structural engineering- Earthquake engineering- Concrete engineering- Construction management- Steel structures- Engineering mechanics- Water resources engineering- Hydraulic engineering- Hydraulic structures- Environmental engineering- Soil mechanics- Foundation engineering- Geotechnical engineering- Transportation engineering- Surveying and geomatics.
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