{"title":"一种全固体废弃物二氧化碳封存材料,由电石炉渣、铜尾矿和赤泥等多种硅酸钙熟料组成:熟料晶体转变和碳化硬化特性","authors":"","doi":"10.1016/j.conbuildmat.2024.138534","DOIUrl":null,"url":null,"abstract":"<div><div>In this study, a CO<sub>2</sub> sequestration material was obtained by all components solid wastes, i.e., carbide slag and copper tailing based on red mud (RM) as crystal regulator after a sintering and carbonation process. With the increasing dosage of RM, the mineral compositions of generated RM-modified clinkers were mainly γ-C<sub>2</sub>S (i.e., around 80 %) at low dosage RM (i.e., 3.0 %), and was gradually increased content of β-C<sub>2</sub>S (β-dicalcium silicate), C<sub>3</sub>S (tricalcium silicate) and C<sub>2</sub>AS (gehlenite) at high dosage RM (i.e., from 3.0 % to 10.0 %). Moreover, the compressive strength of various carbonated compacts made by RM-modified clinkers after CO<sub>2</sub> curing were shows firstly increased and then decreased with a RM dosage inflection of 5.0 %. This compressive strength results should be attributed to their carbonation activity, i.e., higher carbonation activity, higher compressive strength. The obvious carbonation activity difference of various RM-modified clinkers were not simply depends on their only γ-C<sub>2</sub>S content, only β-C<sub>2</sub>S content, only C<sub>3</sub>S content or the sum of calcium silicate minerals, but more closely relate to their combined effect. This work provides a new utilization strategy of RM as crystal regulator according to its high alkaline and high Fe content composition characteristic for obtaining a CO<sub>2</sub> sequestration materials. And also laid a new insight for a synergistic CO<sub>2</sub> sequestration by multiple calcium silicate clinkers in the future.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":null,"pages":null},"PeriodicalIF":7.4000,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"An all solid waste CO2 sequestration material consist of multiple calcium silicate clinkers by carbide slag, copper tailing and red mud: Clinker crystal transformation and carbonation hardening properties\",\"authors\":\"\",\"doi\":\"10.1016/j.conbuildmat.2024.138534\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>In this study, a CO<sub>2</sub> sequestration material was obtained by all components solid wastes, i.e., carbide slag and copper tailing based on red mud (RM) as crystal regulator after a sintering and carbonation process. With the increasing dosage of RM, the mineral compositions of generated RM-modified clinkers were mainly γ-C<sub>2</sub>S (i.e., around 80 %) at low dosage RM (i.e., 3.0 %), and was gradually increased content of β-C<sub>2</sub>S (β-dicalcium silicate), C<sub>3</sub>S (tricalcium silicate) and C<sub>2</sub>AS (gehlenite) at high dosage RM (i.e., from 3.0 % to 10.0 %). Moreover, the compressive strength of various carbonated compacts made by RM-modified clinkers after CO<sub>2</sub> curing were shows firstly increased and then decreased with a RM dosage inflection of 5.0 %. This compressive strength results should be attributed to their carbonation activity, i.e., higher carbonation activity, higher compressive strength. The obvious carbonation activity difference of various RM-modified clinkers were not simply depends on their only γ-C<sub>2</sub>S content, only β-C<sub>2</sub>S content, only C<sub>3</sub>S content or the sum of calcium silicate minerals, but more closely relate to their combined effect. This work provides a new utilization strategy of RM as crystal regulator according to its high alkaline and high Fe content composition characteristic for obtaining a CO<sub>2</sub> sequestration materials. And also laid a new insight for a synergistic CO<sub>2</sub> sequestration by multiple calcium silicate clinkers in the future.</div></div>\",\"PeriodicalId\":288,\"journal\":{\"name\":\"Construction and Building Materials\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":7.4000,\"publicationDate\":\"2024-10-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Construction and Building Materials\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0950061824036766\",\"RegionNum\":1,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CONSTRUCTION & BUILDING TECHNOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Construction and Building Materials","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0950061824036766","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}
An all solid waste CO2 sequestration material consist of multiple calcium silicate clinkers by carbide slag, copper tailing and red mud: Clinker crystal transformation and carbonation hardening properties
In this study, a CO2 sequestration material was obtained by all components solid wastes, i.e., carbide slag and copper tailing based on red mud (RM) as crystal regulator after a sintering and carbonation process. With the increasing dosage of RM, the mineral compositions of generated RM-modified clinkers were mainly γ-C2S (i.e., around 80 %) at low dosage RM (i.e., 3.0 %), and was gradually increased content of β-C2S (β-dicalcium silicate), C3S (tricalcium silicate) and C2AS (gehlenite) at high dosage RM (i.e., from 3.0 % to 10.0 %). Moreover, the compressive strength of various carbonated compacts made by RM-modified clinkers after CO2 curing were shows firstly increased and then decreased with a RM dosage inflection of 5.0 %. This compressive strength results should be attributed to their carbonation activity, i.e., higher carbonation activity, higher compressive strength. The obvious carbonation activity difference of various RM-modified clinkers were not simply depends on their only γ-C2S content, only β-C2S content, only C3S content or the sum of calcium silicate minerals, but more closely relate to their combined effect. This work provides a new utilization strategy of RM as crystal regulator according to its high alkaline and high Fe content composition characteristic for obtaining a CO2 sequestration materials. And also laid a new insight for a synergistic CO2 sequestration by multiple calcium silicate clinkers in the future.
期刊介绍:
Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged.
Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.