微生物菌群矿化和腐蚀纤维提高混凝土裂缝自愈效率

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

Construction and Building Materials Pub Date : 2025-07-14 DOI:10.1016/j.conbuildmat.2025.142671

Aowei Ma , Jiaguang Zhang , Peize Wang , Yuanzhen Liu , Aijuan Zhou

{"title":"微生物菌群矿化和腐蚀纤维提高混凝土裂缝自愈效率","authors":"Aowei Ma , Jiaguang Zhang , Peize Wang , Yuanzhen Liu , Aijuan Zhou","doi":"10.1016/j.conbuildmat.2025.142671","DOIUrl":null,"url":null,"abstract":"<div><div>The use of bacterial mineralization offers an eco-friendly, durable, and potential solution for concrete cracks. The incorporation of fibers could improve the crack healing of concrete to a certain extent under static water conditions. However, self-healing of concrete cracks is still hindered by the smooth surface of the fibers and the employment of pure cultures, especially in unfavorable conditions such as turbulent water conditions. A novel self-healing method for concrete cracks via cooperative employment of facultatively aerobic microbial consortia and acid-etched polypropylene (PP) fibers is proposed in this study. The effects of different chemical etching methods and etching times of PP fibers on the efficiency of microbial adsorption and biodeposition were first investigated in this study. The effects of different methods for improving the self-healing ability of concrete cracks were subsequently compared. The results showed that compared with those of untreated PP fibers, the adsorption and immobilization of microbial consortia by acid-etched PP fibers were nearly two times greater. Compared with those of the samples incorporated with untreated PP fibers, the average widths of crack healing of the samples incorporated with acid-etched PP fibers and both acid-etched and preadsorbed PP fibers increased by 6.4 % and 14 %, respectively, after 28 d of static water curing. The corresponding values of the samples under 28 d of dynamic water curing were 24.1 % and 44.2 %. Microstructure analysis revealed that acid-etched fibers have more and larger calcium carbonate crystals attached to the surface than untreated fibers do, indicating better cooperation of microbial consortia-mineralization and etched fibers.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"491 ","pages":"Article 142671"},"PeriodicalIF":8.0000,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Improvement in the self-healing efficiency of concrete cracks via microbial consortia-mineralization and etched fibers\",\"authors\":\"Aowei Ma , Jiaguang Zhang , Peize Wang , Yuanzhen Liu , Aijuan Zhou\",\"doi\":\"10.1016/j.conbuildmat.2025.142671\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The use of bacterial mineralization offers an eco-friendly, durable, and potential solution for concrete cracks. The incorporation of fibers could improve the crack healing of concrete to a certain extent under static water conditions. However, self-healing of concrete cracks is still hindered by the smooth surface of the fibers and the employment of pure cultures, especially in unfavorable conditions such as turbulent water conditions. A novel self-healing method for concrete cracks via cooperative employment of facultatively aerobic microbial consortia and acid-etched polypropylene (PP) fibers is proposed in this study. The effects of different chemical etching methods and etching times of PP fibers on the efficiency of microbial adsorption and biodeposition were first investigated in this study. The effects of different methods for improving the self-healing ability of concrete cracks were subsequently compared. The results showed that compared with those of untreated PP fibers, the adsorption and immobilization of microbial consortia by acid-etched PP fibers were nearly two times greater. Compared with those of the samples incorporated with untreated PP fibers, the average widths of crack healing of the samples incorporated with acid-etched PP fibers and both acid-etched and preadsorbed PP fibers increased by 6.4 % and 14 %, respectively, after 28 d of static water curing. The corresponding values of the samples under 28 d of dynamic water curing were 24.1 % and 44.2 %. Microstructure analysis revealed that acid-etched fibers have more and larger calcium carbonate crystals attached to the surface than untreated fibers do, indicating better cooperation of microbial consortia-mineralization and etched fibers.</div></div>\",\"PeriodicalId\":288,\"journal\":{\"name\":\"Construction and Building Materials\",\"volume\":\"491 \",\"pages\":\"Article 142671\"},\"PeriodicalIF\":8.0000,\"publicationDate\":\"2025-07-14\",\"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/S0950061825028223\",\"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/S0950061825028223","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

细菌矿化的使用为混凝土裂缝提供了一种环保、耐用和潜在的解决方案。在静水条件下，纤维的掺入能在一定程度上促进混凝土的裂缝愈合。然而，混凝土裂缝的自愈仍然受到纤维表面光滑和纯培养物的使用的阻碍，特别是在湍流水条件等不利条件下。提出了一种利用兼性好氧菌群和酸蚀聚丙烯（PP）纤维协同修复混凝土裂缝的新方法。研究了不同化学蚀刻方式和蚀刻次数对PP纤维微生物吸附和生物沉积效率的影响。比较了不同方法对提高混凝土裂缝自愈能力的效果。结果表明，与未经处理的PP纤维相比，酸蚀PP纤维对微生物群落的吸附和固定化能力提高了近2倍。静态水固化28 d后，与未掺入聚丙烯纤维的试样相比，酸蚀聚丙烯纤维和酸蚀预吸附聚丙烯纤维的试样的平均裂纹愈合宽度分别增加了6.4 %和14 %。动态水养护28 d的试样对应值分别为24.1% %和44.2% %。微观结构分析表明，酸蚀纤维比未酸蚀纤维表面附着的碳酸钙晶体更多、更大，说明酸蚀纤维与微生物菌群矿化有更好的协同作用。

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

Improvement in the self-healing efficiency of concrete cracks via microbial consortia-mineralization and etched fibers

The use of bacterial mineralization offers an eco-friendly, durable, and potential solution for concrete cracks. The incorporation of fibers could improve the crack healing of concrete to a certain extent under static water conditions. However, self-healing of concrete cracks is still hindered by the smooth surface of the fibers and the employment of pure cultures, especially in unfavorable conditions such as turbulent water conditions. A novel self-healing method for concrete cracks via cooperative employment of facultatively aerobic microbial consortia and acid-etched polypropylene (PP) fibers is proposed in this study. The effects of different chemical etching methods and etching times of PP fibers on the efficiency of microbial adsorption and biodeposition were first investigated in this study. The effects of different methods for improving the self-healing ability of concrete cracks were subsequently compared. The results showed that compared with those of untreated PP fibers, the adsorption and immobilization of microbial consortia by acid-etched PP fibers were nearly two times greater. Compared with those of the samples incorporated with untreated PP fibers, the average widths of crack healing of the samples incorporated with acid-etched PP fibers and both acid-etched and preadsorbed PP fibers increased by 6.4 % and 14 %, respectively, after 28 d of static water curing. The corresponding values of the samples under 28 d of dynamic water curing were 24.1 % and 44.2 %. Microstructure analysis revealed that acid-etched fibers have more and larger calcium carbonate crystals attached to the surface than untreated fibers do, indicating better cooperation of microbial consortia-mineralization and etched fibers.

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.