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Using bio-based polymers for curing cement-based materials

Zlopasa, J. and Picken, S. J. and Koenders, E. A. B. (2014):
Using bio-based polymers for curing cement-based materials.
DCMat Ageing Centre, Delft University of Technology, In: 1st Ageing of Materials & Structures Conference, Delft, The Netherlands, 26-28 May 2014, ISBN 9789461863,
[Online-Edition: http://resolver.tudelft.nl/uuid:dd760c59-7f6f-40b1-9ed7-c965...],
[Conference or Workshop Item]

Abstract

Curing is the process of controlling the rate and extent of moisture loss from the surface of cement based materials. It is the final stage in the production of cement-based materials and it is the essential part for achieving continuous hydration of cement, while avoiding cracking due to drying shrinkage. Continuous cement hydration also guarantees a strong bond between aggregate, fewer voids, and depercoliation of capillary pores. Thus, a properly cured cement-based material is prepared for a long service life. Using environmentally friendly, water based bio-polymers could help to achieve more durable cement-based materials, and, therefore preventing a premature end of service life of building materials. Rapid Chloride Migration tests and Environmental Scanning Microscope are employed to investigate the functional properties, e.g. transport property, and microstructure properties, respectively. Mortar samples were cured in air and applied by water-based curing compound, made of sodium alginate. We observed strong beneficial effects of applying sodium alginate as a curing compound in terms of microstructure and hydration development. Based on these results, a less porous microstructure and an improved durable cement-based material was achieved that was prepared for longer service life.

Item Type: Conference or Workshop Item
Erschienen: 2014
Creators: Zlopasa, J. and Picken, S. J. and Koenders, E. A. B.
Title: Using bio-based polymers for curing cement-based materials
Language: English
Abstract:

Curing is the process of controlling the rate and extent of moisture loss from the surface of cement based materials. It is the final stage in the production of cement-based materials and it is the essential part for achieving continuous hydration of cement, while avoiding cracking due to drying shrinkage. Continuous cement hydration also guarantees a strong bond between aggregate, fewer voids, and depercoliation of capillary pores. Thus, a properly cured cement-based material is prepared for a long service life. Using environmentally friendly, water based bio-polymers could help to achieve more durable cement-based materials, and, therefore preventing a premature end of service life of building materials. Rapid Chloride Migration tests and Environmental Scanning Microscope are employed to investigate the functional properties, e.g. transport property, and microstructure properties, respectively. Mortar samples were cured in air and applied by water-based curing compound, made of sodium alginate. We observed strong beneficial effects of applying sodium alginate as a curing compound in terms of microstructure and hydration development. Based on these results, a less porous microstructure and an improved durable cement-based material was achieved that was prepared for longer service life.

Publisher: DCMat Ageing Centre, Delft University of Technology
ISBN: 9789461863
Uncontrolled Keywords: bio-based polymer, curing, microstructure, transport property
Divisions: 13 Department of Civil and Environmental Engineering Sciences
13 Department of Civil and Environmental Engineering Sciences > Institute of Construction and Building Materials
Event Title: 1st Ageing of Materials & Structures Conference
Event Location: Delft, The Netherlands
Event Dates: 26-28 May 2014
Date Deposited: 02 Jun 2015 09:09
Official URL: http://resolver.tudelft.nl/uuid:dd760c59-7f6f-40b1-9ed7-c965...
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