摘要
水泥基材料为多相多尺度结构,各组分均不同程度影响整体韧性,将相关组分按宏观、介观、纳观3个尺度分类概述其对水泥基材料的抗裂增韧机理。宏观尺度如胶凝组分、集料、外加剂、纤维、水胶比、养护制度等,分析其物化效应对水泥基材料抗裂增韧特性的影响机理;介观尺度如微珠、晶须、渗透结晶材料等微米级增强材料,阐述其火山灰、填充、桥接、键合、渗透结晶等增强效应;纳观尺度如纳米SiO_(2)、纳米CaCO_(3)、石墨烯、碳纳米管及微生物、纳米聚合物等纳米级增强材料,介绍其对水化产物微观结构、生长方式及硬化浆体孔结构的增强及优化机理;并阐述‘碳纤维+碳纳米管’、‘纤维+晶须+石墨烯’等跨尺度组分的共轭增韧效应。最后,讨论不同尺度增韧组分当前应用、研究中的不足及发展趋势。
Cement-based materials have a multi-phase and multi-scale structure,and each component forming the structure affects the overall toughness to varying degrees.This review summarized the cracking-resistance and toughening mechanisms of relevant components classified in macroscale,mesoscale and nanoscale to cement-based materials.In the macroscale(such as the cementitious component,aggregate,admixture,fiber,water-binder ratio,curing system,etc.),the influence mechanisms of the physicochemical effects of relevant components on the cracking resistance and toughening characteristics of cement-based materials were analyzed.In the mesoscale(such as microsphere,whisker,capillary crystalline material,etc.),the enhancement effects such as volcanic ash,filling,bridging,bonding,capillary crystallization were described.In the nanoscale(such as nano-SiO_(2),nano-CaCO_(3),graphene,carbon nanotube,microorganism,nano-polymer,etc.),the mechanisms enhancing and optimizing the microstructure of hydration products,growth mode,and pore structure of hardened paste were introduced.The conjugating toughening effects of cross-scale components such as‘carbon fiber+carbon nanotubes’,‘fiber+whisker+graphene’were elucidated.In addition,the shortcomings in the current application/research,and the future development trends for toughening components in different scales were also discussed.
作者
雷东移
李明昂
张鹏
尹斌斌
李莹
宋淋萍
张吉庆
张秀才
卢桂霞
钱凯
刘加平
LEI Dongyi;LI Mingang;ZHANG Peng;YIN Binbin;LI Ying;SONG Linping;ZHANG Jiqing;ZHANG Xiucai;LU Guixia;QIAN Kai;LIU Jiaping(Department of Civil Engineering,Engineering Research Center of Concrete Technology under Marine Environment,Ministry of Education,Qingdao University of Technology,Qingdao 266520,Shandong,China;School of Materials Science and Engineering,Southeast University,Nanjing 211189,China;Department of Architecture and Civil Engineering,City University of Hong Kong,Hong Kong 999077,China;Qingdao Ruiyuan Engineering Group Company Limited,Qingdao 266555,Shandong,China;Qingdao Detai Construction Engineering Company Limited,Qingdao 266555,Shandong,China;College of Civil Engineering and Architcture,Guilin University of Technology,Guilin 541010,Guangxi,China)
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2023年第11期2876-2889,共14页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金(U22A20244,52008223)
西海岸新区科技惠民专项(2021-102)
青创科技支持计划(2021KJ045)
山东省自然科学基金(ZR2020QE252)
海洋环境混凝土技术教育部工程中心开放课题(TMduracon2022009,TMduracon2022019)
宁波市科技创新2025重大专项(2020Z035)。
关键词
水泥基材料
抗裂增韧
多尺度
宏观
介观
纳观
cement-based materials
cracking resistance and toughening
multi-scale
macroscale
mesoscale
nanoscale