@article{MAKHILLJEAS201914517548,
    title = {Characterization of Meta-Kaolin based Geopolymers Produced by
Pre-Curing Process},
    journal = {Journal of Engineering and Applied Sciences},
    volume = {14},
    number = {5},
    pages = {1443-1450},
    year = {2019},
    issn = {1816-949x},
    doi = {jeasci.2019.1443.1450},
    url = {https://makhillpublications.co/view-article.php?issn=1816-949x&doi=jeasci.2019.1443.1450},
    author = {Seunggu,Byeongguk and},
    keywords = {Geopolymer,meta-kaolin,pre-curing,compressive strength,strength,pre-curing,cancrinite},
    abstract = {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.}
    }