Zhen Jiang , Yizhong Mao , Dengwu Jiao , Xiang Hu , Muhammad Talha Ghafoor , Caijun Shi
{"title":"SCM和高效减水剂对混凝土过厚及性能的影响","authors":"Zhen Jiang , Yizhong Mao , Dengwu Jiao , Xiang Hu , Muhammad Talha Ghafoor , Caijun Shi","doi":"10.1016/j.cemconcomp.2025.106233","DOIUrl":null,"url":null,"abstract":"<div><div>The optimum mix design considering fresh and hardened mechanical properties is of great significance for the quality of construction materials. This study mainly examines the influence of excessive paste thickness based on the variation of supplementary cementitious materials (SCMs) and superplasticizer content on the mechanical properties of high-performance concrete (HPC). The test results exhibited the significance of excessive paste thickness on slump flowability and flow retention even without a superplasticizer. The yield stress of HPC was mainly influenced by the presence of a superplasticizer, however, plastic viscosity was primarily dependent on the excessive paste thickness. The test results exhibited that the presence of fly ash slightly improves the rheological properties of HPC, however, its trend depends on the presence of a superplasticizer. The excessive paste thickness has a positive impact on the strength development of HPC up to an optimal point indicating the significance of paste thickness as well as superplasticizer. A slight reduction in compressive strength was observed with the replacement of cement with fly ash, however, a positive impact based on the presence of slag was observed. No significant effect of excessive paste thickness on various environmental factors such as abrasion, chloride penetration, and carbonation of HPC was examined.</div></div>","PeriodicalId":9865,"journal":{"name":"Cement & concrete composites","volume":"164 ","pages":"Article 106233"},"PeriodicalIF":10.8000,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effect of SCM and superplasticizer on excessive paste thickness and properties of concrete\",\"authors\":\"Zhen Jiang , Yizhong Mao , Dengwu Jiao , Xiang Hu , Muhammad Talha Ghafoor , Caijun Shi\",\"doi\":\"10.1016/j.cemconcomp.2025.106233\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The optimum mix design considering fresh and hardened mechanical properties is of great significance for the quality of construction materials. This study mainly examines the influence of excessive paste thickness based on the variation of supplementary cementitious materials (SCMs) and superplasticizer content on the mechanical properties of high-performance concrete (HPC). The test results exhibited the significance of excessive paste thickness on slump flowability and flow retention even without a superplasticizer. The yield stress of HPC was mainly influenced by the presence of a superplasticizer, however, plastic viscosity was primarily dependent on the excessive paste thickness. The test results exhibited that the presence of fly ash slightly improves the rheological properties of HPC, however, its trend depends on the presence of a superplasticizer. The excessive paste thickness has a positive impact on the strength development of HPC up to an optimal point indicating the significance of paste thickness as well as superplasticizer. A slight reduction in compressive strength was observed with the replacement of cement with fly ash, however, a positive impact based on the presence of slag was observed. No significant effect of excessive paste thickness on various environmental factors such as abrasion, chloride penetration, and carbonation of HPC was examined.</div></div>\",\"PeriodicalId\":9865,\"journal\":{\"name\":\"Cement & concrete composites\",\"volume\":\"164 \",\"pages\":\"Article 106233\"},\"PeriodicalIF\":10.8000,\"publicationDate\":\"2025-07-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Cement & concrete composites\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0958946525003154\",\"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":"Cement & concrete composites","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0958946525003154","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}
Effect of SCM and superplasticizer on excessive paste thickness and properties of concrete
The optimum mix design considering fresh and hardened mechanical properties is of great significance for the quality of construction materials. This study mainly examines the influence of excessive paste thickness based on the variation of supplementary cementitious materials (SCMs) and superplasticizer content on the mechanical properties of high-performance concrete (HPC). The test results exhibited the significance of excessive paste thickness on slump flowability and flow retention even without a superplasticizer. The yield stress of HPC was mainly influenced by the presence of a superplasticizer, however, plastic viscosity was primarily dependent on the excessive paste thickness. The test results exhibited that the presence of fly ash slightly improves the rheological properties of HPC, however, its trend depends on the presence of a superplasticizer. The excessive paste thickness has a positive impact on the strength development of HPC up to an optimal point indicating the significance of paste thickness as well as superplasticizer. A slight reduction in compressive strength was observed with the replacement of cement with fly ash, however, a positive impact based on the presence of slag was observed. No significant effect of excessive paste thickness on various environmental factors such as abrasion, chloride penetration, and carbonation of HPC was examined.
期刊介绍:
Cement & concrete composites focuses on advancements in cement-concrete composite technology and the production, use, and performance of cement-based construction materials. It covers a wide range of materials, including fiber-reinforced composites, polymer composites, ferrocement, and those incorporating special aggregates or waste materials. Major themes include microstructure, material properties, testing, durability, mechanics, modeling, design, fabrication, and practical applications. The journal welcomes papers on structural behavior, field studies, repair and maintenance, serviceability, and sustainability. It aims to enhance understanding, provide a platform for unconventional materials, promote low-cost energy-saving materials, and bridge the gap between materials science, engineering, and construction. Special issues on emerging topics are also published to encourage collaboration between materials scientists, engineers, designers, and fabricators.