International journal of

ADVANCED AND APPLIED SCIENCES

EISSN: 2313-3724, Print ISSN:2313-626X

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 Volume 5, Issue 5 (May 2018), Pages: 110-115

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 Original Research Paper

 Title: Effect of Temperature vis-à-vis curing time on the hydration products of OPC paste

 Author(s): Rodrigo V. Dejeto 1, 2, *, Kiyofumi Kurumisawa 2

 Affiliation(s):

 1Division of Natural Sciences and Mathematics, University of the Philippines Visayas, Tacloban College, Tacloban City, 6500 Philippines
 2Laboratory of Eco-Materials and Resources, Division of Sustainable Resources Engineering, Faculty of Engineering, Hokkaido University, Sapporo, 060-8628, Japan

 https://doi.org/10.21833/ijaas.2018.05.015

 Full Text - PDF          XML

 Abstract:

The curing temperature and time are the basic fundamental factors that contribute to the hydration of Ordinary Portland Cement (OPC) paste. The purpose of this work is to investigate the effect of temperature vis-à-vis curing time on the hydration products: Portlandite (CH), calcium silicate hydrate (C-S-H), ettringite (AFt) and monosulfoaluminate (AFm) of Japan OPC paste using the water-cement ratio (w/c) of 0.40 and following intensive procedures in sample preparation and testing. Results showed that the proportion of CH and C-S-H phases dominated the hydration products at higher curing temperature and longer time as revealed in BEI/SEM analysis. The XRD/Rietveld analysis showed that the CH had the highest peaks intensity compared to other crystalline phases cured at 40oC for 28 days. It has a mineralogical composition equivalent to 20.06% compared to 17.80% as OPC cured at room temperature. There was no C-S-H phase detected since it is non-crystalline/amorphous in nature with composition equivalent to 61.75%. The conversion of AFt to AFm phase from 0.12% to 3.10% was also detected at higher curing temperature and longer time. The CH is the major crystalline phase identified in this study. 

 © 2018 The Authors. Published by IASE.

 This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

 Keywords: Ordinary Portland cement, Temperature, SEM, XRD

 Article History: Received 22 October 2017, Received in revised form 11 March 2018, Accepted 20 March 2018

 Digital Object Identifier: 

 https://doi.org/10.21833/ijaas.2018.05.015

 Citation:

 Dejeto RV and Kurumisawa K (2018). Effect of Temperature vis-à-vis curing time on the hydration products of OPC paste. International Journal of Advanced and Applied Sciences, 5(5): 110-115

 Permanent Link:

 http://www.science-gate.com/IJAAS/2018/V5I5/Dejeto.html

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