TY  - JOUR
T1  - Characterization of Meta-Kaolin based Geopolymers Produced by
Pre-Curing Process
AU - Kang, Seunggu AU - Kang, Byeongguk AU - Kim, Kangduk 
JO  - Journal of Engineering and Applied Sciences
VL  - 14
IS  - 5
SP  - 1443
EP  - 1450
PY  - 2019
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2019.1443.1450
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2019.1443.1450
KW  - Geopolymer
KW  -meta-kaolin
KW  -pre-curing
KW  -compressive strength
KW  -strength
KW  -pre-curing
KW  -cancrinite
AB  - This study was conducted to research the effect of the pre-curing process on the compressive
strength of meta-kaolin-based-geopolymers. Pre-curing is a process in which the green geopolymer is left at
room temperature for a certain period of time prior to high-temperature curing and it is known to be effective
for increasing the strength of the geopolymers. In this experiment, the compressive strength of geopolymers
was measured according to various pre-curing conditions. Various properties of geopolymers fabricated with
a pre-curing process were analyzed using UTM, XRD, SEM, FT-IR and a Gilmore needle tester. It was found
that pre-curing was effective in improving the compressive strength of meta-kaolin-based-geopolymers. For
example, the specimens prepared by pre-curing for 6 days during a total curing process of 7 days showed the
highest compressive strength and the specimens prepared by pre-curing for 13 days during a total curing
process of 28 days showed the highest compressive strength, 76.3 MPa which is 2.4 times higher than that of
specimen made without pre-curing process. Several crystal phases such as zeolite, cancrinite and
Calcium-Aluminium-Silicate-Hydrate (denoted as C-A-S-H) were found in the geopolymer gel and the
compressive strength of the geopolymer increased with pre-curing time and amount of cancrinite and C-A-S-H
phases.
ER  -