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《Journal of Nanjing University of Aeronautics & Astronautics》 2008-03
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Effects of Blast Furnace Slag on Micro-Mechanical Properties of Interface Transition Zone

Zheng Keren1,2,Sun Wei2,Lin Wei2,Zhao Qingxing3(1.School of Civil Engineering & Architecture,Central South University,Changsha,410075,China;2.School of Materials Science & Engineering,Southeast University,Nanjing,210096,China;3.College of Civil Engineering and Mechanics,Yanshan University,Qinhuangdao,066004,China)  
Elastic modulus and the hardness of the interface transition zone and neighboring zone of concrete with 0,30%,50% and 80% cement replaced by blast furnace slag are tested by nano-indentation.Results show that the minimum values occur at 5~25 μm from the aggregate surface for both elastic modulus and the hardness when blast furnace slag substitution is lower than 30%;both elastic modulus and the hardness are unchange evidently with the distance from the aggregate surface when the blast furnace slag substitution exceeds 50%; the difference of the hardness or the elastic modulus between interface transition zone(a thickness of 25 μm) and the bulk matrix decreases with the increase of blast furnace slag,thus strengthening the benefit effects of slag interface transition zone.
【Fund】: 国家自然科学基金(59938170)重点资助项目
【CateGory Index】: TU528
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