{"title":"农工废弃物在气固化碱活化路面复合材料中的利用:性能、微观结构洞察和生命周期影响","authors":"Shriram Marathe , Akhila Sheshadri , Łukasz Sadowski","doi":"10.1016/j.clema.2024.100281","DOIUrl":null,"url":null,"abstract":"<div><div>This study investigates the development and performance of agro-industrial waste-based air-cured alkali-activated concrete composites (AC) for sustainable high-strength rigid pavement applications. The calculated amounts of liquid sodium silicate and sodium hydroxide flakes were used with an adequate quantity of water to prepare the alkali-activator solution. Agro-Industrial by-products, including ground granulated blast furnace slag (GGBS), construction and demolition (C&D) waste, and sugarcane bagasse ash (SBA), were utilized to develop AC mixes and the mechanical properties, micro-structural behaviour, and life cycle impacts were studied. Optimized AC mixes containing 50% recycled aggregates (RCA) (with 50% natural coarse aggregates) and 15% SBA (with 85% GGBS) demonstrated superior compressive, splitting-tensile, and flexural strength, while significantly reducing embodied energy and carbon emissions. Microstructural analysis through XRD, SEM, EDAX, and TGA confirmed the formation of stable alumino-silicate hydrate phases, contributing to enhanced mechanical strength performances. The life cycle analysis results indicated considerable environmental benefits compared to traditional Portland Cement based pavement concrete counterparts. This research presents a sustainable solution for pavement infrastructure, aligning with circular economy principles by promoting the reduction of resource consumption and greenhouse gas emissions.</div></div>","PeriodicalId":100254,"journal":{"name":"Cleaner Materials","volume":"14 ","pages":"Article 100281"},"PeriodicalIF":0.0000,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Agro-industrial waste utilization in air-cured alkali-activated pavement composites: Properties, micro-structural insights and life cycle impacts\",\"authors\":\"Shriram Marathe , Akhila Sheshadri , Łukasz Sadowski\",\"doi\":\"10.1016/j.clema.2024.100281\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>This study investigates the development and performance of agro-industrial waste-based air-cured alkali-activated concrete composites (AC) for sustainable high-strength rigid pavement applications. The calculated amounts of liquid sodium silicate and sodium hydroxide flakes were used with an adequate quantity of water to prepare the alkali-activator solution. Agro-Industrial by-products, including ground granulated blast furnace slag (GGBS), construction and demolition (C&D) waste, and sugarcane bagasse ash (SBA), were utilized to develop AC mixes and the mechanical properties, micro-structural behaviour, and life cycle impacts were studied. Optimized AC mixes containing 50% recycled aggregates (RCA) (with 50% natural coarse aggregates) and 15% SBA (with 85% GGBS) demonstrated superior compressive, splitting-tensile, and flexural strength, while significantly reducing embodied energy and carbon emissions. Microstructural analysis through XRD, SEM, EDAX, and TGA confirmed the formation of stable alumino-silicate hydrate phases, contributing to enhanced mechanical strength performances. The life cycle analysis results indicated considerable environmental benefits compared to traditional Portland Cement based pavement concrete counterparts. This research presents a sustainable solution for pavement infrastructure, aligning with circular economy principles by promoting the reduction of resource consumption and greenhouse gas emissions.</div></div>\",\"PeriodicalId\":100254,\"journal\":{\"name\":\"Cleaner Materials\",\"volume\":\"14 \",\"pages\":\"Article 100281\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-12-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Cleaner Materials\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2772397624000650\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Cleaner Materials","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2772397624000650","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Agro-industrial waste utilization in air-cured alkali-activated pavement composites: Properties, micro-structural insights and life cycle impacts
This study investigates the development and performance of agro-industrial waste-based air-cured alkali-activated concrete composites (AC) for sustainable high-strength rigid pavement applications. The calculated amounts of liquid sodium silicate and sodium hydroxide flakes were used with an adequate quantity of water to prepare the alkali-activator solution. Agro-Industrial by-products, including ground granulated blast furnace slag (GGBS), construction and demolition (C&D) waste, and sugarcane bagasse ash (SBA), were utilized to develop AC mixes and the mechanical properties, micro-structural behaviour, and life cycle impacts were studied. Optimized AC mixes containing 50% recycled aggregates (RCA) (with 50% natural coarse aggregates) and 15% SBA (with 85% GGBS) demonstrated superior compressive, splitting-tensile, and flexural strength, while significantly reducing embodied energy and carbon emissions. Microstructural analysis through XRD, SEM, EDAX, and TGA confirmed the formation of stable alumino-silicate hydrate phases, contributing to enhanced mechanical strength performances. The life cycle analysis results indicated considerable environmental benefits compared to traditional Portland Cement based pavement concrete counterparts. This research presents a sustainable solution for pavement infrastructure, aligning with circular economy principles by promoting the reduction of resource consumption and greenhouse gas emissions.