Firing Resistance of Ordinary Portland Cement Pastes Incorporated a Waste of Building Bricks
American Journal of Chemical Engineering
Volume 5, Issue 6, November 2017, Pages: 140-146
Received: Jul. 24, 2017; Accepted: Aug. 21, 2017; Published: Nov. 17, 2017
Views 895      Downloads 31
Author
Hassan Hassanien Mohamed Darweesh, Department of Refractories, Ceramics and Building Materials, National Research Centre, Dokki, Cairo, Egypt
Article Tools
Follow on us
Abstract
Addition of fine materials, as clay bricks or Homra (H) to Ordinary Portland cement (OPC) is evidently increases resistance to firing. Effect of firing temperature on physical, mechanical properties and phase composition of cement pastes is investigated. H can react with lime liberated from hydration of OPC. This improves morphology and microstructure of formed hydration products. OPC cement was partially substituted by 0, 5, 15, 25 and 35 wt.% H. Cement pastes were subjected to firing for 3 hours at temperatures 100, 200, 300 400, 500 and 600°C. Results showed that loss on ignition of various cement pastes increased with temperature as well as with H. Density decreased with temperature up to 400°C, while porosity increased, Above 400°C, density increased and porosity decreased. Compressive strength of OPC pastes increased with temperature up to 500°C and then decreased. Those incorporated H increased only up to 400°C and then decreased. Hardened cement pastes with 15% H recorded highest compressive strength value at 400°C while the OPC at 500°C. SEM images showed a microstructure of well-developed crystals of CSH and CAH. Ca(OH)2 are spreading in matrix at temperatures up to 400°C. There are some cracks at 600°C.
Keywords
Homra, Pozzolanic, Temperature, Density, Porosity, Strength, Microstructure, SEM
To cite this article
Hassan Hassanien Mohamed Darweesh, Firing Resistance of Ordinary Portland Cement Pastes Incorporated a Waste of Building Bricks, American Journal of Chemical Engineering. Vol. 5, No. 6, 2017, pp. 140-146. doi: 10.11648/j.ajche.20170506.14
Copyright
Copyright © 2017 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
References
[1]
S. N. Ghosh, S. L. Sarkar & S. Harsh, “Mineral admixtures in cement and concrete”, in: S. S. Rehsi (Ed), Progress in cement and concrete, Vol 4, ABI Books, New Delhi, 1993, 158-173.
[2]
F. Pacheco-Torgal, “Biopolymers and Biotech Admixtures for Eco Efficient Construction Materials”, WOODHEAD PUBLISHING LIMITED, Sawston, Cambridge, Elsevier Limited. Registered Office: The Boulevard, Langford Lane, Kidlington, Oxford, OX5 1GB, United Kingdom, Registration No. 1982084, Registered in England and Wales, 2015.
[3]
H. H. Darweesh, “Effect of the combination of some pozzolanic wastes on the properties of Portland cement pastes” iiCL'industriaitaliana del Cemento, Italy, 808, 2006, 298-311.
[4]
H. H. M. Darweesh, “Characteristics of metakaoline blended cement pastes” Sil. Ind. (Cer. Sci. &Techn.), Belgium, Vol. 72, Nr. (1-2), 2007, 24-32.
[5]
H. M. Darweesh and H. M. Awad “Effect of calcination temperature and calcined clay substitution on the properties of Portland Cement Pastes” iiCl'industriaitaliana del Cemento, Italy, 844, 2008, 486-501.
[6]
S. S. Rehsiand S. K. Garg, “Heat resistance of Portland fly ash cement”, Cement, 4, 2, 1976, 14-16.
[7]
S. M. Morsy, A. F. Galaland S. A. Abo-El-Enein, “Effect of temperature on phase composition and microstructure of artificial pozzolana cement pastes containing burnt kaolinite clay”, Cem. Concr. Res., 28, 8, 1998, 1157- 1163.
[8]
M. Heikaland H. El-Didamony, “Pozzolanic activity of Homra with lime”, Mansoura Sci. Bull., 26, 1, 1999, 79-95.
[9]
H. El-Didamony, M. Heikaland M. M. Shoaib, “Homrapozzolanic cement”, Silic. Ind., 65, Nr. 3-4, 2000, 39-43.
[10]
M. Heikal, M. Morsyand S. A. Abo-El-Enein, “Electrical conductivity of pozzolanic cement pastes and mortar containing crushed clay bricks (Homra)”, The 15th Egypt. Chem. Conf., Nov 20-25, Egy. Chem. Soc., Part II, Cairo, Egypt. 1999, 145-152.
[11]
H. H. M. Darweesh Setting, hardening and St. properties of cement pastes with zeolite alone or in combination with slag” Inter Ceram (Intern. Cer. Review), Germany, Vol. 1, 2012, 52-57.
[12]
ASTM –Standards “Standard Test Method for Normal water of Consistency of Hydraulic Cement”, C187-86, 1993, 148-150.
[13]
ASTM –Standards “Standard Test Method for Setting Time of Hydraulic Cement”, C191-92, 1993, 866-868.
[14]
ASTM-Standards “Standard Test Method for Compressive Strength of Dimension Stone”, C170-90, 1993, 828-830.
[15]
A. M. Neville,“Properties of concrete”. 4th edn Essex (UK): Longman, 1995.
[16]
P. C. Hewlett, “Lea's Chemistry of Cement and Concrete”; 4th Edn; John Wiley & Sons Inc., New York, 1998.
[17]
H. El-Didamony, H. H. M. Darweeshand R. A. Mostafa, “Characteristics of pozzolanic cement pastes Part I: Physico-mechanical properties” Sil. Ind. (Cer Sci &T echn), Belgium, 73, Nr. 11-12, 2008, 193-200.
[18]
J. Piasta, Z. Sawiczand L. Rudzinski, “Changes in structure of hardened cement pastes due to high temperature”, Materials Structure, 17, 100, 1984, 291-296.
[19]
H. H. M. Darweesh and H. Youssef, “Preparation of 11Å Al-substituted Tobermorite from Egyptian Trackyte Rock and Its Effect on the Specific Properties of Portland Cement”, Inter Ceram Intern. Cer. Review, 63, 7-8, 2014, 358-362.
ADDRESS
Science Publishing Group
548 FASHION AVENUE
NEW YORK, NY 10018
U.S.A.
Tel: (001)347-688-8931