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Volume 44 Number 5 Volume 44 Number 6 Volume 45 Number 1

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Research articles

ScienceAsia 44(2018): 397-402 |doi: 10.2306/scienceasia1513-1874.2018.44.397

Effect of curing temperature and time on the mechanical properties of hydroxyapatite/calcined kaolin

Ratchawoot Sutthia, Nisanath Kaewwinudb, Prinya Chindaprasirtc, Yoshiharu Mutohd, Teerawat Laonapakula,*

ABSTRACT:     In the current study, improvement of HAp/Calcined kaolin (CK) strength as a function of its curing regime was studied. The influence of curing temperature and time on the compressive strength of hydroxyapatite combined with calcined kaolin (HAp/CK) samples was investigated using statistical analysis. Curing temperatures were ranged 40, 60, 80 °C and curing times were 2, 7, 14, 21, 28 days, respectively. Prolonged curing time and increased curing temperature improved the compressive strength of the samples. The curing time and temperature significantly affected the compressive strength of HAp/CK samples, while there was no interaction between curing time and curing temperature. The highest compressive strength, 37.8 MPa, was realized by curing the sample at 80 °C for 28 days. The optimal process was curing HAp/CK at 60 °C for 14 days to achieve a high compressive strength.

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a Department of Industrial Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen 40002 Thailand
b Engineering and Technology Management Program, Faculty of Industrial Technology, Surindra Rajabhat University, Surin 32000 Thailand
c Sustainable Infrastructure Research and Development Centre, Department of Civil Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen 40002 Thailand; and Academy of Science, The Royal Society of Thailand, Dusit, Bangkok 10300 Thailand
d (Professor Emeritus) Nagaoka University of Technology, Nagaoka, Niigata 940-2188 Japan

* Corresponding author, E-mail: teerla@kku.ac.th

Received 15 Jul 2018, Accepted 12 Dec 2018