{"title":"Boosting the performance of low-carbon alkali activated slag with APEG PCEs: a comparison with ordinary Portland cement","authors":"Yue Zhang, L. Lei, J. Plank, Liugang Chen","doi":"10.1080/21650373.2023.2219253","DOIUrl":null,"url":null,"abstract":"This study focused on investigating the dispersing effectiveness of polycarboxylate (PCE) superplasticizers with different carboxylate groups in two binder systems: Alkali-activated Slag (AAS) and Ordinary Portland Cement (OPC). Two α-allyl-ω-hydroxy poly (ethylene glycol) ether (APEG) PCE copolymers were prepared from acrylic acid (AA) or maleic anhydride (MA) separately. Performance test results in AAS revealed that MA-7APEG polymer exhibited much stronger dispersing efficiency than AA-7APEG2, despite both PCE polymers having the same anionicity and comparable molecular weight. This difference in effectiveness can be attributed to the stronger calcium binding capacity of the MA-7APEG polymer, as determined through anionic charge measurements and potential titration analysis. The study highlights the importance of considering the properties of the carboxylate groups in the design of effective PCE superplasticizers for use in different binder systems.","PeriodicalId":48521,"journal":{"name":"Journal of Sustainable Cement-Based Materials","volume":"12 1","pages":"1347 - 1359"},"PeriodicalIF":4.7000,"publicationDate":"2023-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Sustainable Cement-Based Materials","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1080/21650373.2023.2219253","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}
引用次数: 2
Abstract
This study focused on investigating the dispersing effectiveness of polycarboxylate (PCE) superplasticizers with different carboxylate groups in two binder systems: Alkali-activated Slag (AAS) and Ordinary Portland Cement (OPC). Two α-allyl-ω-hydroxy poly (ethylene glycol) ether (APEG) PCE copolymers were prepared from acrylic acid (AA) or maleic anhydride (MA) separately. Performance test results in AAS revealed that MA-7APEG polymer exhibited much stronger dispersing efficiency than AA-7APEG2, despite both PCE polymers having the same anionicity and comparable molecular weight. This difference in effectiveness can be attributed to the stronger calcium binding capacity of the MA-7APEG polymer, as determined through anionic charge measurements and potential titration analysis. The study highlights the importance of considering the properties of the carboxylate groups in the design of effective PCE superplasticizers for use in different binder systems.
期刊介绍：
The Journal of Sustainable Cement-Based Materials aims to publish theoretical and applied researches on materials, products and structures that incorporate cement. The journal is a forum for discussion of research on manufacture, hydration and performance of cement-based materials; novel experimental techniques; the latest analytical and modelling methods; the examination and the diagnosis of real cement and concrete structures; and the potential for improved cement-based materials. The journal welcomes original research papers, major reviews, rapid communications and selected conference papers. The Journal of Sustainable Cement-Based Materials covers a wide range of topics within its subject category, including but are not limited to: • raw materials and manufacture of cement • mixing, rheology and hydration • admixtures • structural characteristics and performance of cement-based materials • characterisation techniques and modeling • use of fibre in cement based-materials • degradation and repair of cement-based materials • novel testing techniques and applications • waste management
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