 Back
Research Article
ScienceAsia 31 (2005): 277-281 |doi: 10.2306/scienceasia1513-1874.2005.31.277
Korat Clays as Raw Materials for
Lightweight Aggregates
Sirirat Rattanachan* and Charussri Lorprayoon
ABSTRACT: This study assesses the possible use of Korat clays, deposited at Suranaree University of Technology
(SUT), for the production of lightweight aggregates. The SUT clays were collected and divided into 2 groups,
i.e. white clay and reddish brown clay, to study their heat-treatment behavior. The SUT clay mixtures in
various ratios were investigated to find the suitable compositions and heat-treatment (between 1000 and
1250oC) for the production of lightweight aggregates. After firing at 1250oC, the SUT clays expanded 21.05
and 5.70% for the white and reddish brown clays, respectively. Firing expansion was mainly dependent on
the amount of SiO2, fluxing oxides and water of the raw materials. These aggregates are highly impervious
to water and exhibit considerable firing expansion, low bulk density (1.29-1.76 g/cm3) and fair technical
properties (unit weight and bending strength) for lightweight concrete. These results encourage the use of
these clays for the production of lightweight aggregates.
Download PDF
Institute of Engineering, Suranaree University of Technology, 111 University Avenue, Muang District,
Nakhon Ratchasima, Thailand 30000.
* Corresponding author, E-mail: sirirat.b@sut.ac.th
Received 8 Mar 2005,
Accepted 6 Jun 2005
|
