[1]戎志丹,孙伟,陈惠苏,等.超高性能水泥基材料的力学行为及机理分析[J].深圳大学学报理工版,2010,27(1):88-94.
 RONG Zhi-dan,SUN Wei,CHEN Hui-su,et al.Mechanical behaviors and microstructure mechanism analysis of ultra high performance cementitious composites[J].Journal of Shenzhen University Science and Engineering,2010,27(1):88-94.
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超高性能水泥基材料的力学行为及机理分析()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第27卷
期数:
2010年1期
页码:
88-94
栏目:
土木建筑工程
出版日期:
2010-01-31

文章信息/Info

Title:
Mechanical behaviors and microstructure mechanism analysis of ultra high performance cementitious composites
文章编号:
1000-2618(2010)01-0088-07
作者:
戎志丹12孙伟12陈惠苏12顾春平12
1.江苏省土木工程材料重点实验室,南京 211189
2.东南大学材料科学与工程学院,南京 211189
Author(s):
RONG Zhi-dan12SUN Wei12CHEN Hui-su12and GU Chun-ping12
1)Jiangsu Key Laboratory of Construction Materials,Nanjing 211189,P.R.China 
2)College of Materials Science and Engineering,Southeast University,Nanjing 21189,P.R.China
关键词:
混凝土超高性能水泥基复合材料干热养护力学性能微观结构
Keywords:
concreteultra-high performance cementitious composites(UHPCC)xerothermic curingmechanical propertiesmicrostructure
分类号:
TU 528;TU 35
文献标志码:
A
摘要:
研究安防系统对超高性能水泥基复合材料工作性及超高力学性能的特殊要求,以大掺量超细工业废渣取代水泥,掺加超高硬度细集料,采用高温干热养护制度,成功制备出一种超高性能水泥基复合材料.对其工作性及不同养护温度和养护时间下的力学性能进行测试,结果表明,制备的材料具有较好的工作特性及超高力学性能,可满足安保产品要求,其抗压强度最高可达240 MPa.采用X射线衍射技术、差热-热重分析方法及扫描电镜对其微观结构形成进行分析,结果显示,超高硬度细集料与胶凝材料的强物理结合使其在复合材料中起增强相的作用,高温养护加速了水泥的水化及矿物惨合料的火山灰反应,降低了材料中Ca(OH)2的含量,增加了C-S-H凝胶的含量,提高了材料的密实度,改善了界面微观结构,提高了超高性能水泥基复合材料的宏观力学性能.
Abstract:
To develop ultra-high performance cementitious composites which fulfill the special requirement of the ATM field on workability as the well as strength of the inorganic composites,replacement of a large quantity of cement with ultra-fine industrial residues was considered.In addition,to improve the compressive strength of UHPCC,ultra-hard fine aggregates were adopted as an alternative scheme.To verify the feasibility of the abovementioned approach,the workability of the newly designed mixtures was investigated,and the static mechanical properties of hardened UHPCC sample cured at different xerothermic temperatures and times were tested.The results demonstrate that the materials prepared in this paper have good flowability and capable of producing ultra-high mechanical performance in order to fit the demand of the safety production. The highest compressive strength of the UHPCC recipe can reach 240 MPa.The structural formation of the ultra-fine industrial residues as well as ultra-hard fine aggregate from the samples was further explored. The microstructure of UHPCC was investigated via X-Ray diffraction,differential thermal analysis (DTA),thermal gravimetric analysis (TGA),and scanning electron microscope(SEM).The results of microstructural experiments reveal that ultra-hard fine aggregates just act as reinforced particles in UHPCC,the high temperature accelerates the hydration of cement.In addition,the secondary pozzolanic reaction of ultra-fine industrial residues with CH decreases the dosage of portlandite,increases the amount of C-S-H gel,makes the structure denser,and improves the interface microstructure and the mechanical properties of UHPCC.

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备注/Memo

备注/Memo:
收稿日期:2009-04-20;修回日期:2009-11-20
基金项目:江苏省科技厅校企联盟横向资助项目(8512000012);东南大学优秀博士论文基金资助项目(YBJJ0724)
作者简介:戎志丹(1981-),男(汉族),江苏省南京市人,东南大学博士研究生.E-mail:rongzhidan@tom.com
通讯作者:孙伟(1935-),女(汉族),中国工程院院士,东南大学教授、博士生导师.E-mail:sunwei@seu.edu.cn
更新日期/Last Update: 2010-02-06