湖南大学学报（自然科学版）2023，Vol.50Issue(12)：92-101,10.DOI:10.16339/j.cnki.hdxbzkb.2023310
C60细石自密实混凝土耐久性能影响因素试验研究
Experimental Study on Affecting Factors on Durability Performance of C60 Fine Stone Self-compacting Concrete
摘要
Abstract
To meet the requirements of the outsourced concrete for the relevant project,C60 fine stone Self Compacting Concrete(SCC)was prepared.The influencing mechanisms of water-binder ratio and anti-cracking agent on the workability,mechanical properties,volumetric deformation performance,and durability of fine stone SCC,such as resistance to sulfate erosion,chloride ion penetration,freeze-thaw,and carbonation,were investigated,and the performance change laws of fine stone concrete were also explored.The influence of different factors on the microstructure of concrete was investigated by Scanning Electron Microscope(SEM)and Nuclear Magnetic Resonance Spectroscopy(NMR)tests,and compared with the macroscopic properties.The results show that the water-binder ratio on the performance of fine stone concrete is similar to that of ordinary concrete.There is an optimum amount of anti-cracking agent,and the right amount of anti-cracking agent can generate Mg(OH)2 to fill matrix pores,which staggered grows with flocculent C-S-H and acicular AFt,improving the pore structure.It can also improve the mechanical properties and durability of fine stone concrete.However,when the dosage of the anti-cracking agent is too high,the compound erosion effect decreases the sulfate resistance of SCC,and the optimum content is 8％.关键词
自密实混凝土/细石混凝土/耐久性能/抗裂剂Key words
self-compacting concrete/fine stone concrete/durability/anti-cracking agent分类
土木建筑引用本文复制引用
何越骁,黄维蓉,唐喜,陈义林,汪子淇..C60细石自密实混凝土耐久性能影响因素试验研究[J].湖南大学学报（自然科学版）,2023,50(12):92-101,10.基金项目
广西重点研发计划项目(桂科AB22036007),Guangxi Key Research and Development Program(桂科AB22036007) （桂科AB22036007）
材料与化工重庆市研究生联合培养基地基金(JDLHPYJD2019002),Materials and Chemical Engineering Chongqing Municipal Graduate Students Joint Cultivation Base Fund(JDLHPYJD2019002) （JDLHPYJD2019002）
重庆交通大学研究生科研创新(创新基金)项目(CY820297),Chongqing Jiaotong University Graduate Student Research Innovation(Innovation Fund)Program(CY820297) （创新基金）
