H. B. Mahmud and Syamsul Bahri and Y. W. Yee and Y. T. Yeap , Effect of Rice Husk Ash on Strength and Durability of High Strength High Performance Concrete. journal = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology. February 2016, vol. 111(3). 390 - 395 [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/10004076.