{"title":"超高性能水泥基复合材料的物理化学、力学和断裂分析","authors":"Awadhesh Sharma, M. A. Iqbal, S. Ray","doi":"10.1680/jmacr.23.00061","DOIUrl":null,"url":null,"abstract":"The present research aims to develop cost-effective and environmentally friendly Ultra-High Performance Concrete (UHPC) composite using fly ash and quartz powder as a sustainable alternative to cement. The performance of various constituents is examined, and their influence on fresh and hardened properties is investigated for the optimum trial mix design. The results show that a cube compressive strength of 144 MPa was achieved with fly ash content of 20% and 10% quartz powder and other ingredients without any special heat treatment. Advanced characterization studies such as heat of hydration and X-ray diffraction analysis were performed to understand the performance of fly ash blended UHPC. Further, various fracture properties, such as fracture toughness, fracture energy, brittleness number, etc., were investigated considering geometrically similar notched beam specimens for UHPC mix with 1.5% and 2.5% steel fibre content. The optimum UHPC mix achieved good scores in terms of the strength index and the carbon emission index, indicating the concrete is eco-friendly and sustainable.","PeriodicalId":18113,"journal":{"name":"Magazine of Concrete Research","volume":null,"pages":null},"PeriodicalIF":1.8000,"publicationDate":"2024-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Physio-chemical, mechanical and fracture analysis of ultra-high performance cementitious composite\",\"authors\":\"Awadhesh Sharma, M. A. Iqbal, S. Ray\",\"doi\":\"10.1680/jmacr.23.00061\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The present research aims to develop cost-effective and environmentally friendly Ultra-High Performance Concrete (UHPC) composite using fly ash and quartz powder as a sustainable alternative to cement. The performance of various constituents is examined, and their influence on fresh and hardened properties is investigated for the optimum trial mix design. The results show that a cube compressive strength of 144 MPa was achieved with fly ash content of 20% and 10% quartz powder and other ingredients without any special heat treatment. Advanced characterization studies such as heat of hydration and X-ray diffraction analysis were performed to understand the performance of fly ash blended UHPC. Further, various fracture properties, such as fracture toughness, fracture energy, brittleness number, etc., were investigated considering geometrically similar notched beam specimens for UHPC mix with 1.5% and 2.5% steel fibre content. The optimum UHPC mix achieved good scores in terms of the strength index and the carbon emission index, indicating the concrete is eco-friendly and sustainable.\",\"PeriodicalId\":18113,\"journal\":{\"name\":\"Magazine of Concrete Research\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.8000,\"publicationDate\":\"2024-01-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Magazine of Concrete Research\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://doi.org/10.1680/jmacr.23.00061\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"CONSTRUCTION & BUILDING TECHNOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Magazine of Concrete Research","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1680/jmacr.23.00061","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}
Physio-chemical, mechanical and fracture analysis of ultra-high performance cementitious composite
The present research aims to develop cost-effective and environmentally friendly Ultra-High Performance Concrete (UHPC) composite using fly ash and quartz powder as a sustainable alternative to cement. The performance of various constituents is examined, and their influence on fresh and hardened properties is investigated for the optimum trial mix design. The results show that a cube compressive strength of 144 MPa was achieved with fly ash content of 20% and 10% quartz powder and other ingredients without any special heat treatment. Advanced characterization studies such as heat of hydration and X-ray diffraction analysis were performed to understand the performance of fly ash blended UHPC. Further, various fracture properties, such as fracture toughness, fracture energy, brittleness number, etc., were investigated considering geometrically similar notched beam specimens for UHPC mix with 1.5% and 2.5% steel fibre content. The optimum UHPC mix achieved good scores in terms of the strength index and the carbon emission index, indicating the concrete is eco-friendly and sustainable.
期刊介绍：
For concrete and other cementitious derivatives to be developed further, we need to understand the use of alternative hydraulically active materials used in combination with plain Portland Cement, sustainability and durability issues. Both fundamental and best practice issues need to be addressed.
Magazine of Concrete Research covers every aspect of concrete manufacture and behaviour from performance and evaluation of constituent materials to mix design, testing, durability, structural analysis and composite construction.
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