养护制度对偏高岭土氧化镁超高性能混凝土的影响

IF 8 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2025-06-28 DOI:10.1016/j.conbuildmat.2025.142388

Binbin Zhang , Yanyan Zhou , Haoyang Gong , Yongning Liang , Di Liu , Yazhou Wang , Yu Ma , Qilin Zhang , Tao Ji

{"title":"养护制度对偏高岭土氧化镁超高性能混凝土的影响","authors":"Binbin Zhang , Yanyan Zhou , Haoyang Gong , Yongning Liang , Di Liu , Yazhou Wang , Yu Ma , Qilin Zhang , Tao Ji","doi":"10.1016/j.conbuildmat.2025.142388","DOIUrl":null,"url":null,"abstract":"<div><div>The effects of different curing regimes on the performance of ultra-high performance concrete containing metakaolin and magnesium oxide (MM-UHPC) were investigated. Four curing regimes were included, namely standard curing (SC), hot water curing (HC), steam curing (MC), and autoclave curing (AC). Additionally, the hydration products, pore structure, microhardness, interfacial transition zone (ITZ) properties, and single fiber pullout properties of MM-UHPC were characterized to reveal the influencing mechanism. The results showed that compared to SC, the thermal curing (HC, MC, and AC) facilitated the incorporation of Al elements from metakaolin into hydrated calcium silicate (C-S-H), increasing the average chain length of C-S-H and promoting the crosslinking of long straight silicate chains. The thermal curing also promoted the secondary hydration reaction of calcium hydroxide [Ca(OH)<sub>2</sub>] enriched in the ITZ, improving the ITZ properties, increasing the microhardness value of the ITZ, and enhancing the friction force between steel fibers and matrix. Furthermore, the thermal curing reduced the porosity of matrix and refined the pore structure of matrix. These factors resulted in an increase in 120 days flexural strength of MM-UHPC by 14.9 %, 10.5 %, and 20.9 % for HC, MC, and AC, respectively, compared to SC. Similarly, the compressive strength increased by 12.0 %, 11.4 %, and 24.9 %, respectively. The 120 days flexural and compressive strength of MM-UHPC are in the following order: AC > HC > MC > SC.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"490 ","pages":"Article 142388"},"PeriodicalIF":8.0000,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effect of curing regime on ultra-high performance concrete containing metakaolin and magnesium oxide\",\"authors\":\"Binbin Zhang , Yanyan Zhou , Haoyang Gong , Yongning Liang , Di Liu , Yazhou Wang , Yu Ma , Qilin Zhang , Tao Ji\",\"doi\":\"10.1016/j.conbuildmat.2025.142388\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The effects of different curing regimes on the performance of ultra-high performance concrete containing metakaolin and magnesium oxide (MM-UHPC) were investigated. Four curing regimes were included, namely standard curing (SC), hot water curing (HC), steam curing (MC), and autoclave curing (AC). Additionally, the hydration products, pore structure, microhardness, interfacial transition zone (ITZ) properties, and single fiber pullout properties of MM-UHPC were characterized to reveal the influencing mechanism. The results showed that compared to SC, the thermal curing (HC, MC, and AC) facilitated the incorporation of Al elements from metakaolin into hydrated calcium silicate (C-S-H), increasing the average chain length of C-S-H and promoting the crosslinking of long straight silicate chains. The thermal curing also promoted the secondary hydration reaction of calcium hydroxide [Ca(OH)<sub>2</sub>] enriched in the ITZ, improving the ITZ properties, increasing the microhardness value of the ITZ, and enhancing the friction force between steel fibers and matrix. Furthermore, the thermal curing reduced the porosity of matrix and refined the pore structure of matrix. These factors resulted in an increase in 120 days flexural strength of MM-UHPC by 14.9 %, 10.5 %, and 20.9 % for HC, MC, and AC, respectively, compared to SC. Similarly, the compressive strength increased by 12.0 %, 11.4 %, and 24.9 %, respectively. The 120 days flexural and compressive strength of MM-UHPC are in the following order: AC > HC > MC > SC.</div></div>\",\"PeriodicalId\":288,\"journal\":{\"name\":\"Construction and Building Materials\",\"volume\":\"490 \",\"pages\":\"Article 142388\"},\"PeriodicalIF\":8.0000,\"publicationDate\":\"2025-06-28\",\"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/S0950061825025395\",\"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/S0950061825025395","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}

引用次数: 0

摘要

研究了不同养护方式对偏高岭土氧化镁超高性能混凝土（MM-UHPC）性能的影响。包括四种养护制度，即标准养护（SC），热水养护（HC），蒸汽养护（MC）和高压灭菌器养护（AC）。此外，还对MM-UHPC的水化产物、孔隙结构、显微硬度、界面过渡区（ITZ）性能和单纤维拉拔性能进行了表征，以揭示影响机理。结果表明，与SC相比，热固化（HC、MC和AC）有利于偏高岭土中的Al元素进入水合硅酸钙（C-S-H），增加了C-S-H的平均链长，促进了长而直的硅酸盐链的交联。热固化还促进了富含ITZ的氢氧化钙[Ca(OH)2]的二次水化反应，改善了ITZ的性能，提高了ITZ的显微硬度值，增强了钢纤维与基体之间的摩擦力。热固化降低了基体的孔隙率，细化了基体的孔隙结构。这些因素导致MM-UHPC的120天抗弯强度与SC相比，HC、MC和AC分别提高了14.9 %、10.5 %和20.9 %。同样，抗压强度分别提高了12.0 %、11.4 %和24.9 %。MM-UHPC 120天抗弯抗压强度顺序为：AC >； HC >； MC >； SC。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

Effect of curing regime on ultra-high performance concrete containing metakaolin and magnesium oxide

The effects of different curing regimes on the performance of ultra-high performance concrete containing metakaolin and magnesium oxide (MM-UHPC) were investigated. Four curing regimes were included, namely standard curing (SC), hot water curing (HC), steam curing (MC), and autoclave curing (AC). Additionally, the hydration products, pore structure, microhardness, interfacial transition zone (ITZ) properties, and single fiber pullout properties of MM-UHPC were characterized to reveal the influencing mechanism. The results showed that compared to SC, the thermal curing (HC, MC, and AC) facilitated the incorporation of Al elements from metakaolin into hydrated calcium silicate (C-S-H), increasing the average chain length of C-S-H and promoting the crosslinking of long straight silicate chains. The thermal curing also promoted the secondary hydration reaction of calcium hydroxide [Ca(OH)₂] enriched in the ITZ, improving the ITZ properties, increasing the microhardness value of the ITZ, and enhancing the friction force between steel fibers and matrix. Furthermore, the thermal curing reduced the porosity of matrix and refined the pore structure of matrix. These factors resulted in an increase in 120 days flexural strength of MM-UHPC by 14.9 %, 10.5 %, and 20.9 % for HC, MC, and AC, respectively, compared to SC. Similarly, the compressive strength increased by 12.0 %, 11.4 %, and 24.9 %, respectively. The 120 days flexural and compressive strength of MM-UHPC are in the following order: AC > HC > MC > SC.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

Construction and Building Materials 工程技术-材料科学：综合

CiteScore

13.80

自引率

21.60%

发文量

3632

审稿时长

82 days

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.