摘要
通过二元、三元复合工业废渣大掺量取代水泥,普通砂取代磨细石英砂,掺短切钢纤维等优化基体组成工艺制备出了抗压、抗折强度分别为220,70 MPa的超高强混凝土(UHSC);系统研究了矿物掺和料掺加方式对UHSC动态力学行为的影响规律;通过压汞分析(MIP)、扫描电镜(SEM)、X射线能谱分析(EDAX)、X射线衍射分析(XRD),研究了UHSC的孔结构、界面、显微结构和水化产物.结果表明:复掺矿物掺和料改善了UHSC的界面结构,促进了水化产物的形成,从而提高了UHSC的抗冲击和耐撞磨性能.
A new type of ultra-high strength concrete（UHSC） with compressive strength of 220 MPa and flexural strength of 70 MPa was prepared by utilizing composite mineral admixtures,natural fine aggregates,and short and fine steel fibers in the normal shaping and curing condition.The dynamic mechanical behavior of UHSC with different mineral composition were investigated.Meanwhile the pore-structure,interfacial zone and hydration products were investigated by mercury intrusion porosimetry（MIP）,scanning electron microscope（SEM）,energy dispersion X-ray analysis（EDAX） and X-ray diffraction（XRD）.The experimental results show that mineral admixtures can effectively optimize the micro-structure of ITZ and improve the formation of C-S-H gel,and consequently improve the impact and abrasion resistance.
出处
《建筑材料学报》
EI
CAS
CSCD
北大核心
2010年第3期310-314,共5页
Journal of Building Materials
基金
国家自然科学基金资助项目(NSF50702014)
国防基础科研"十一五"项目(A1420060186)
关键词
超高强混凝土
矿物掺和料
韧性
抗冲击
耐撞磨
机理
UHSC
mineral admixture
toughness
anti-impact
abrasion resistance
mechanism
