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Computers and Concrete
  Volume 10, Number 6, December 2012 , pages 631-647

Application of Fuller\'s ideal curve and error function to making high performance concrete using rice husk ash
Chao-Lung Hwang, Le Anh-Tuan Bui and Chun-Tsun Chen

    This paper focuses on the application of Fuller\'s ideal gradation curve to theoretically design blended ratio of all solid materials of high performance concrete (HPC), with the aid of error function, and then to study the effect of rice husk ash (RHA) on the performance of HPC. The residual RHA, generated when burning rice husk pellets at temperatures varying from 600 to 800oC, was collected at steam boilers in Vietnam. The properties of fresh and hardened concrete are reviewed. It is possible to obtain the RHA concrete with comparable or better properties than those of the specimen without RHA with lower cement consumption. High flowing concrete designed by the proposed method was obtained without bleeding or segregation. The application of the proposed method for HPC can save over 50% of the consumption of cement and limit the use of water. Its strength efficiency of cement in HPC is 1.4-1.9 times higher than that of the traditional method. Local standards of durability were satisfied at the age of 91 days both by concrete resistivity and ultrasonic pulse velocity.
Key Words
    fuller\'s ideal gradation curve; high performance concrete; rice husk ash; strength efficiency; durability
Chao-Lung Hwang, Le Anh-Tuan Bui and Chun-Tsun Chen: Department of Construction Engineering, National Taiwan University of Science and Technology 43, Keelung Rd., Sec. 4, Taipei 106, Taiwan, R.O.C

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