{"title":"Recycling of waste crushed stone powder for alkali-activated material production","authors":"Zhuguo Li, Gökhan Kaplan","doi":"10.1007/s10163-024-01973-z","DOIUrl":null,"url":null,"abstract":"<div><p>The growing use of crushed stone and manufactured sand poses a major challenge to the recycling of their by-product known as crushed stone powder (CSP). To establish an effective recycling method for CSP, the authors conducted a detailed investigation on the setting, strength, and durability of alkali-activated materials (AAMs) with slag (GGBFS) and CSP as precursors, and examined their chemical and microstructural characteristics by X-ray diffraction (XRD) and scanning electron microscope (SEM) analysis. Experimental results clarified in detail the performance features and influencing factors of AAM made from a blend of CSP and slag, and indicated that CSP can be utilized as an inactive precursor in a large blending ratio (50–80%) to produce AAMs with high strength and excellent durability. The GGBFS/CSP-based AAMs have high flexural strength, reaching up to 1/5 ~ 1/6 of the compressive strength, surpassing 15.0 MPa. The AAMs using CSP almost retain the crystals from CSP within them, and the presence of CSP particles fragments C-A-S-H gels of polymerization reaction product, making them granular and discontinuous. Compared to the siliceous CSP, the limestone CSP slightly enhanced the strength properties of AAM.</p></div>","PeriodicalId":643,"journal":{"name":"Journal of Material Cycles and Waste Management","volume":null,"pages":null},"PeriodicalIF":2.7000,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Material Cycles and Waste Management","FirstCategoryId":"93","ListUrlMain":"https://link.springer.com/article/10.1007/s10163-024-01973-z","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
引用次数: 0
Abstract
The growing use of crushed stone and manufactured sand poses a major challenge to the recycling of their by-product known as crushed stone powder (CSP). To establish an effective recycling method for CSP, the authors conducted a detailed investigation on the setting, strength, and durability of alkali-activated materials (AAMs) with slag (GGBFS) and CSP as precursors, and examined their chemical and microstructural characteristics by X-ray diffraction (XRD) and scanning electron microscope (SEM) analysis. Experimental results clarified in detail the performance features and influencing factors of AAM made from a blend of CSP and slag, and indicated that CSP can be utilized as an inactive precursor in a large blending ratio (50–80%) to produce AAMs with high strength and excellent durability. The GGBFS/CSP-based AAMs have high flexural strength, reaching up to 1/5 ~ 1/6 of the compressive strength, surpassing 15.0 MPa. The AAMs using CSP almost retain the crystals from CSP within them, and the presence of CSP particles fragments C-A-S-H gels of polymerization reaction product, making them granular and discontinuous. Compared to the siliceous CSP, the limestone CSP slightly enhanced the strength properties of AAM.
期刊介绍:
The Journal of Material Cycles and Waste Management has a twofold focus: research in technical, political, and environmental problems of material cycles and waste management; and information that contributes to the development of an interdisciplinary science of material cycles and waste management. Its aim is to develop solutions and prescriptions for material cycles.
The journal publishes original articles, reviews, and invited papers from a wide range of disciplines related to material cycles and waste management.
The journal is published in cooperation with the Japan Society of Material Cycles and Waste Management (JSMCWM) and the Korea Society of Waste Management (KSWM).