Overview
ABSTRACT
Compared with mortars, incorporating polymers under the form of aggregates in cast is a less known and used method. This article presents recent advances in order to manufacture lightweight plasterboards via the addition of recycled polymers. The good compatibility of these two compounds allows for achieving mechanical strength as well as improved sound insulation and thermal properties. Various criteria concerning formulations have thus been established in order to comply with construction standards.
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Read the articleAUTHORS
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Veronica CALDERON: Full Professor at the University of Burgos (Spain)
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Matthieu HORGNIES: Research Manager at Lafarge Research Center
INTRODUCTION
Recent developments in the field of construction materials have focused in particular on composite materials incorporating waste materials in their composition, with the aim of determining the compatibility of these waste materials with the matrix in which they are incorporated. The aim is to obtain new products offering interesting and durable properties, while at the same time meeting the demands of the construction industry.
Social values within human societies are evolving rapidly with economic development and urbanization. They are gradually shifting from the production of consumer goods to concerns about improving living conditions and respecting the environment. As a result, society is becoming increasingly aware of the desirability of sustainable development, which is reflected in a proactive policy of recycling household waste and industrial by-products to prevent them from being dumped in landfill sites or burned in incinerators.
This article aims to contribute to sustainable development through the reuse of polymer-based wastes in the preparation of products for the construction market, in particular in the design of lightweight plaster with characteristics at least equivalent to those of conventional plaster. After describing plaster, its components and the methods used to lighten this type of material, examples of lightened plaster formulations are presented, with a detailed description of the final properties obtained.
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KEYWORDS
state of the art | formulation | polymer | insulation | building | recycling | plaster | lightweighting
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Recycled polymers in plaster manufacturing
Gypsum-based materials and lightweighting
Bibliography
Websites
Buildex Inc. Haydite Expanded-Shale Lightweight Aggregate http://www.buildex.com/haydite.html (page consulted on September 10, 2011)
Standards and norms
- Plasterboard – Definitions, requirements and test methods - NF EN 520 - 2009
- Test methods for masonry mortars – Part 19: Determination of water vapor permeability of hardened plaster mortars - NF EN 1015-19/A1 - 2005
- Testing methods for natural stone – Determination of real and apparent densities and open and total porosities - NF EN 1936 - 2007
- Building materials and products – Hygrothermal properties...
Patents
ROMÁN ALEMA (B.), TORRES ZACARÍAS (P.). – Mortero de yeso con vermiculita expandida y aditivado, y procedimiento para su obtencion. Patent (Spain). ES2331043 B1 (2010).
WHINFIELD and DICKSON. – Improvements Relating to the Manufacture of Highly Polymeric Substances, British Patent 578,079,1941. Polymeric Linear Terephthalic Esters, U.S. Patent 2,465,319 (1949).
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