A Review on Multi-Scale Toughening and Regulating Methods for Modern Concrete:From Toughening Theory to Practical Engineering Application  

作　　者：Jinhui Tang Chang Gao Yi Li Jie Xu Jiale Huang Disheng Xu Zhangli Hu Fangyu Han Jiaping Liu 

机构地区：[1]School of Materials Science and Engineering,Jiangsu Key Laboratory of Construction Materials,Southeast University,Nanjing,China [2]State Key Laboratory of High Performance Civil Engineering Materials,Jiangsu Sobute New Materials Co.Ltd.,Nanjing,China

出　　处：《Research》2024年第4期23-41,共19页研究(英文)

基　　金：supported by the Major Program of National Natural Science Foundation of China(52293432);Youth Program of National Natural Science Foundation of China(52108197);Program of Anhui Joint Laboratory(JZCL007KF);Research Project Funding by China Three Gorges Corporation(202203397).

摘　　要：Concrete is the most widely used and highest-volume basic material in the word today.Enhancing its toughness,including tensile strength and deformation resistance,can boost the structural load-bearing capacity,minimize cracking,and decrease the amount of concrete and steel required in engineering projects.These advancements are crucial for the safety,durability,energy efficiency,and emission reduction of structural engineering.This paper systematically summarized the brittle characteristics of concrete and the various structural factors influencing its performance at multiple scales,including molecular,nano-micro,and meso-macro levels.It outlines the principles and impacts of concrete toughening and crack prevention from both internal and external perspectives,and discusses recent advancements and engineering applications of toughened concrete.In situ polymerization and fiber reinforcement are currently practical and highly efficient methods for enhancing concrete toughness.These techniques can boost the matrix’s flexural strength by 30%and double its fracture energy,achieving an ultimate tensile strength of up to 20 MPa and a tensile strain exceeding 0.6%.In the future,achieving breakthroughs in concrete toughening will probably rely heavily on the seamless integration and effective synergy of multi-scale toughening methods.

关 键 词：TOUGHNESS steel BREAKTHROUGH 

分 类 号：TG1[金属学及工艺—金属学]