Study on the Workability of High Strength Concrete with the Grading of Coarse Aggregate Skeleton Structure

Abstract:

People often use superplasticizer and mineral admixtures (such as steel slag, slag, etc.) to increase the density of concrete and improve concrete strength, but don’t use coarse aggregate gradding. The paper selects the coarse aggregate of skeleton structure from several grading concept, and uses Uniform Design to test high strength concrete workability, and analyses results. It is shown from the results that the method of Uniform Design can significantly reduce the workload, and concrete mixture slump increases linearly with the water-cement ratio and sand percentage, but decreases linearly with steel slag addition, and the water released from the flocculation of cement by superplasticizer can increase the slump, and most of water plays the role of lubricant before it reacts with cement, and the effect of slump that sand extends coarse aggregate skeleton are greater than that sand surface area increases.

• Periodical: Advanced Materials Research (Volumes 261-263)
• Pages: 411-415
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.261-263.411
• Online since: May 2011
• Authors: Er Bu Tian, Feng Chao Wang, Ren Wei Zhang, Tao JI
• Keywords: Cement Concrete, Coarse Aggregate, Slag, Slump, Superplasticizer, Uniform Design, Water-Cement Ratio

References

[1] Hongfa YU, Junlong Liu, Yunsheng Zhang, Sun Wei, Microstructure and Durability Forming Mechanism of High Performance Concrete, Journal of Nanjing University of Aeronautics &Astronautics 39 (2007) 240– 243.

[2] Dinghua Xu, Wenyuan Feng, Concrete Materials Guide, China Building Materials Industry Press, Beijing, 2005, 18-27.

[3] Congxu Liu,Ziyun Wen,Zaiqing Wang,Performance and Manufacturing Process of Concrete Aggregate, South China University of Technology Press, Guangzhou,1999, 25-35.

[4] Erbu Tian,Biao Ma,Xueming Lu, Yanqiang Shi, Vibration analysis on coarse aggregate gradation of interlocking-dense cement concrete, Concrete, 2008, 221(3), 77-83.

[5] Ancheng Wang, Coarse Frame Characteristic and Reaserch on Frame Concrete, Dalian University of Technology, Dalian, 2006, 15-17.

[6] I.-Cheng Yeh, Design of high-performance concrete mixture using neural networks and nonlinear programming, Journal of Computing in Civil Engineering 13 (1) (1999) 36–42.

DOI: 10.1061/(asce)0887-3801(1999)13:1(36)

[7] JIANG Ying-Jun, CHEN Zhong-da, PENG Bo, DAI Jing-liang, Mixture design method and anti-cracking performance of cement stabilizing crashed rock pavement with dense skeleton typ, Journal of Chang'an University(Natural Science Edition), 2002, 22(4), 9-12.

[8] WANG Ying-fei,MA Bao-guo, A Study on Concrete Additive SHJ-X of Crack-inhibition and Anti-permeability, Port&Waterway Engineering, 2007, 401(4), 8-22.

[9] Wu Kuanghuai, Zhang Xiaoning, Coarse Aggregate Void-filling Method for Asphalt Mixture Desig, Central SouthHighway Engineering, 2004, 29(2), 68-62.

[10] Chinese Standard JGJ55-2000, Specification for mix proportion design of ordinary concrete, Beijing, 2001.