Effect of High Loss on Ignition-Fly Ash on Properties of Concrete Fully Immersed in Sulfate Solution

2018 3rd International Conference on Building Materials and Construction

土木建筑工程

Ngo, Si-Huy^1 ; Huynh, Trong-Phuoc^2 ; Thi Le, Thanh-Tam^1 ; Thi Mai, Ngoc-Hang^1

Department of Engineering and Technology, Hong Duc University, No. 565, Quang Trung Street, Dong Ve Ward, Thanh Hoa City

440000, Viet Nam^1

Department of Rural Technology, College of Rural Development, Can Tho University, Campus II, 3/2 St., Ninh Kieu Dist., Can Tho City

900000, Viet Nam^2

关键词: Engineering properties;    Fly ash concretes;    Loss on ignition;    Properties of concretes;    Replacement level;    Sulfate solutions;    Ultrasonic pulse velocity;    Water-to-binder ratio;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/371/1/012007/pdf
DOI  :  10.1088/1757-899X/371/1/012007

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

This paper presents the experimental results of an investigation on the engineering properties and durability of high loss on ignition-fly ash concrete fully immersed in 5% sodium sulfate solution. The fly ash used in this study is a raw material with the loss on ignition of 15.8%, which is much higher than the upper limitation of 6% as stipulated by ASTM C618. Eight concrete mixtures were designed with different water-to-binder ratios of 0.35 and 0.45. For each water-to-binder ratio, the fly ash was used to replace 0%, 10%, 20%, and 30% amount of cement. Test results show that the workability of fresh concrete increased, while its unit weight decreased with increasing the fly ash replacement level. In addition, the concrete mixtures with 10% and 20% fly ash content showed the higher compressive strength, especially at long-term ages, than that of the fly ash-free concrete mixture. Further, all of the fly ash concrete mixtures exhibited the good quality with ultrasonic pulse velocity values of higher than 4100 m/s.