Influence of groundnut shell ash on the properties of cement pastes

Postgraduate Symposium in Civil and Environmental Engineering 2019

生态环境科学;土木建筑工程

Usman, Jamilu^1 ; Yahaya, Nasiru^2 ; Mohammed Mazizah, E.^2

Building Department, Ahmadu Bello University, Zaria, Nigeria^1

Civil Engineering Department, University College of Technology, Sarawak, Malaysia^2

关键词: Cement replacement;    Different proportions;    Groundnut shells;    Hardened cement paste;    Microstructure analysis;    Potential materials;    Pozzolanic reaction;    Soundness of cement;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/601/1/012015/pdf
DOI  :  10.1088/1757-899X/601/1/012015

来源: IOP

【 摘 要 】

This paper presents the effect of groundnut shell ash (GHA) on the properties of cement paste. Cement pastes containing GHA as cement replacement in different proportions up to 50% by weight were prepared. At fresh state, the consistency and setting times of the pastes were checked, while at hardened state, soundness and compressive strength of the pastes were determined. In addition, the microstructure of the hardened paste was investigated using the Fourier Transformed Infrared (FTIR) technique. The results show that GHA increased water demand and delayed setting times, but improved soundness of cement paste. Moreover, compressive strength enhancement of hardened cement paste due pozzolanic reaction as evidenced by the microstructure analysis (FTIR) was observed with up to 10% GHA replacing cement. Thus, GHA is a good potential material for cement replacement in cement paste.