{"title":"一种改善PCE与煤矸石粉水泥浆体相容性的替代方法","authors":"Zonglin Xie, Yuxuan Li, Dahui Sun, Yi Tian, Jinyuan Hu, Qiang Yuan, Zheng Chen","doi":"10.1007/s42768-023-00174-y","DOIUrl":null,"url":null,"abstract":"<div><p>Coal gangue (CG) is an environmental waste that faces an urgent demand for disposal in China. The utilization of CG in construction materials has broad application prospects and gained increasing interest. However, the poor compatibility of polycarboxylate superplasticizer (PCE) with CG powder hinders its efficiency in a wide range of applications. Here, this paper attempts to improve the compatibility of PCE with CG powder in cement paste based on the regulation of aggregation and the adsorption behavior of PCE. Dynamic light scattering (DLS) and fluorescence spectroscopy tests were carried out to understand the improved mechanism. The results indicated that the addition of CG powder increases the ionic strengths of the cement liquid phase, which makes PCE tend to aggregate at a lower concentration compared with no CG powder introduction. Adding (CH<sub>3</sub>COO)<sub>2</sub>Cu is beneficial for enhancing the workability of cement paste by reducing PCE aggregation while maintaining the compressive strength of cement specimens. Therefore, (CH<sub>3</sub>COO)<sub>2</sub>Cu extra addition can be regarded as an effective and sustainable way to improve the workability of cement paste with CG powder.</p><h3>Graphical abstract</h3>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":807,"journal":{"name":"Waste Disposal & Sustainable Energy","volume":"6 1","pages":"139 - 150"},"PeriodicalIF":0.0000,"publicationDate":"2023-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"An alternative approach to improve the compatibility of PCE in cement paste blend with coal gangue powder\",\"authors\":\"Zonglin Xie, Yuxuan Li, Dahui Sun, Yi Tian, Jinyuan Hu, Qiang Yuan, Zheng Chen\",\"doi\":\"10.1007/s42768-023-00174-y\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Coal gangue (CG) is an environmental waste that faces an urgent demand for disposal in China. The utilization of CG in construction materials has broad application prospects and gained increasing interest. However, the poor compatibility of polycarboxylate superplasticizer (PCE) with CG powder hinders its efficiency in a wide range of applications. Here, this paper attempts to improve the compatibility of PCE with CG powder in cement paste based on the regulation of aggregation and the adsorption behavior of PCE. Dynamic light scattering (DLS) and fluorescence spectroscopy tests were carried out to understand the improved mechanism. The results indicated that the addition of CG powder increases the ionic strengths of the cement liquid phase, which makes PCE tend to aggregate at a lower concentration compared with no CG powder introduction. Adding (CH<sub>3</sub>COO)<sub>2</sub>Cu is beneficial for enhancing the workability of cement paste by reducing PCE aggregation while maintaining the compressive strength of cement specimens. Therefore, (CH<sub>3</sub>COO)<sub>2</sub>Cu extra addition can be regarded as an effective and sustainable way to improve the workability of cement paste with CG powder.</p><h3>Graphical abstract</h3>\\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":807,\"journal\":{\"name\":\"Waste Disposal & Sustainable Energy\",\"volume\":\"6 1\",\"pages\":\"139 - 150\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2023-11-20\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Waste Disposal & Sustainable Energy\",\"FirstCategoryId\":\"6\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s42768-023-00174-y\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Waste Disposal & Sustainable Energy","FirstCategoryId":"6","ListUrlMain":"https://link.springer.com/article/10.1007/s42768-023-00174-y","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
An alternative approach to improve the compatibility of PCE in cement paste blend with coal gangue powder
Coal gangue (CG) is an environmental waste that faces an urgent demand for disposal in China. The utilization of CG in construction materials has broad application prospects and gained increasing interest. However, the poor compatibility of polycarboxylate superplasticizer (PCE) with CG powder hinders its efficiency in a wide range of applications. Here, this paper attempts to improve the compatibility of PCE with CG powder in cement paste based on the regulation of aggregation and the adsorption behavior of PCE. Dynamic light scattering (DLS) and fluorescence spectroscopy tests were carried out to understand the improved mechanism. The results indicated that the addition of CG powder increases the ionic strengths of the cement liquid phase, which makes PCE tend to aggregate at a lower concentration compared with no CG powder introduction. Adding (CH3COO)2Cu is beneficial for enhancing the workability of cement paste by reducing PCE aggregation while maintaining the compressive strength of cement specimens. Therefore, (CH3COO)2Cu extra addition can be regarded as an effective and sustainable way to improve the workability of cement paste with CG powder.
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