Effect of Curing Conditions on Compressive Strength of FA-POFA-based Geopolymer Mortar

14th International Conference on Concrete Engineering and Technology

Shukor Lim, Nor Hasanah Abdul^1 ; Samadi, Mostafa^2 ; Ariffin, Nur Farhayu^3 ; Hussin, Mohd Warid^1 ; Rafique Bhutta, Muhammad Aamer^4 ; Sarbini, Noor Nabilah^1 ; Abd Khalid, Nur Hafizah^1 ; Aminuddin, Eeydzah^1

Department of Structure and Materials, Faculty of Civil Engineering, Universiti Teknologi Malaysia, Johor Bahru, Johor

81310 UTM, Malaysia^1

Department of Technical and Engineering Education, Faculty of Education, Universiti Teknologi Malaysia, Johor Bahru, Johor

81310 UTM, Malaysia^2

Faculty of Civil Engineering and Earth Resources, Universiti Malaysia Pahang, Lebuhraya 8 Tun Razak, Kuantan, Pahang

26300, Malaysia^3

Department of Civil Engineering, Faculty of Applied Sciences, University of British Columbia, Vancouver

BC

V6T 1Z4, Canada^4

关键词: Alkaline solutions;    Curing condition;    Delay Time;    Geopolymer mortars;    Mass ratio;    Sodium hydroxide solutions;    Sodium silicate;    Sodium silicate solutions;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/431/9/092007/pdf
DOI  :  10.1088/1757-899X/431/9/092007

来源: IOP

【 摘 要 】

This paper presents the effect of curing conditions on geopolymer mortar prepared from the blend of palm oil fuel ash (POFA) and fly ash (FA) as full replacement of cement with a combination of sodium silicate and sodium hydroxide solution used as alkaline liquid. The density and strength of the geopolymer mortars with FA:POFA mass ratios of 70:30 together with sodium silicate solution-to-sodium hydroxide solution by mass is 2.5, are investigated. The concentration of alkaline solution used is 14 Molar. Tests were carried out on 70 × 70 × 70 mm cube geopolymer mortar specimens. The effects of curing conditions including the duration of heat curing, temperature of heat curing and delay time before heat curing on compressive strength of mortar are examined. The results revealed that as the temperature increased the compressive strength of geopolymer mortar are increases, the delay time before heat curing increased, the compressive strength of geopolymer mortar reduced and suitable duration for heat curing is within one to two days.