Spent coffee grounds enhanced strength of alkali-hydroxide-free geopolymer concrete: an optimization study

IF 2 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

International Journal of Mechanical and Materials Engineering Pub Date : 2025-09-01 DOI:10.1186/s40712-025-00331-7

Sheh Ching Khong, Jia Jun Yee, Jolius Gimbun, Kong Fah Tee, Siew Choo Chin

{"title":"Spent coffee grounds enhanced strength of alkali-hydroxide-free geopolymer concrete: an optimization study","authors":"Sheh Ching Khong, Jia Jun Yee, Jolius Gimbun, Kong Fah Tee, Siew Choo Chin","doi":"10.1186/s40712-025-00331-7","DOIUrl":null,"url":null,"abstract":"<div><p>This paper presents the development of alkali-hydroxide-free (AHF) geopolymer concrete made of fly ash and spent coffee grounds (SCG) mix. Geopolymers are often formulated with the use of alkali hydroxides, which may have health and safety risks, durability, and workability issues. The addition of acidic materials such as SCG may neutralize the alkali content in geopolymer concrete, hence producing an AHF geopolymer. In this work, the effect of SCG addition ranging from 0 to 10% on the geopolymer strength cured from 7 to 90 days was studied. The optimum curing period and SCG addition that can yield the highest strength were optimized using response surface methodology (RSM). It was found that the geopolymer concrete containing 1.85% SCG cured for 75 days has the highest compressive strength of 12.78 MPa. The AHF geopolymer demonstrated 6.8% higher acid resistance than the control mix. This work demonstrated the contribution of SCG in the formation of an AHF geopolymer with enhanced strength.</p></div>","PeriodicalId":592,"journal":{"name":"International Journal of Mechanical and Materials Engineering","volume":"20 1","pages":""},"PeriodicalIF":2.0000,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://jmsg.springeropen.com/counter/pdf/10.1186/s40712-025-00331-7","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Mechanical and Materials Engineering","FirstCategoryId":"1085","ListUrlMain":"https://link.springer.com/article/10.1186/s40712-025-00331-7","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

This paper presents the development of alkali-hydroxide-free (AHF) geopolymer concrete made of fly ash and spent coffee grounds (SCG) mix. Geopolymers are often formulated with the use of alkali hydroxides, which may have health and safety risks, durability, and workability issues. The addition of acidic materials such as SCG may neutralize the alkali content in geopolymer concrete, hence producing an AHF geopolymer. In this work, the effect of SCG addition ranging from 0 to 10% on the geopolymer strength cured from 7 to 90 days was studied. The optimum curing period and SCG addition that can yield the highest strength were optimized using response surface methodology (RSM). It was found that the geopolymer concrete containing 1.85% SCG cured for 75 days has the highest compressive strength of 12.78 MPa. The AHF geopolymer demonstrated 6.8% higher acid resistance than the control mix. This work demonstrated the contribution of SCG in the formation of an AHF geopolymer with enhanced strength.

查看原文本刊更多论文

废咖啡渣增强无碱地聚合物混凝土强度的优化研究

本文介绍了粉煤灰与废咖啡渣（SCG）混合料的无碱（AHF）地聚合物混凝土的研制。地聚合物通常使用碱氢氧化物配制，这可能存在健康和安全风险、耐久性和可加工性问题。添加酸性物质如SCG可以中和地聚合物混凝土中的碱含量，从而产生AHF地聚合物。本文研究了SCG添加量为0 ~ 10%对固化7 ~ 90天地聚合物强度的影响。采用响应面法（RSM）优化了可获得最高强度的最佳养护周期和SCG添加量。结果表明，含1.85% SCG的地聚合物混凝土固化75 d后抗压强度最高，为12.78 MPa。AHF地聚合物的耐酸性能比对照混合物高6.8%。这项工作证明了SCG在形成具有增强强度的AHF地聚合物中的作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊