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1. Definition of lightweight mortars and concretes
The use of inert materials of different densities to make mortars has been widely known and exploited since the days of ancient Greece and the Roman Empire . However, the widespread use of lightweight aggregates in construction began primarily with the discovery of expanded clay, a lightweight aggregate with sufficient mechanical strength and a quality suitable for use in structural concrete applications. The process was developed by Stephen Hayde at the beginning of the 20th century in Kansas City (Missouri, USA).
Large-scale manufacture and marketing of this type of product began in 1950, as these lightweight materials offer a number...
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Definition of lightweight mortars and concretes
Lightweight aggregates used in mortars and concretes
Bibliography
Websites
Buildex Inc. Haydite Expanded-Shale Lightweight Aggregate. http://www.buildex.com/haydite.html (page consulted on September 10, 2011).
Standards and norms
- Tests to determine the geometric characteristics of aggregates – Part 1: Determining granularity – Particle size analysis by sieving. - NF EN 933-1 - 2012
- Tests to determine the geometric characteristics of aggregates – Part 2: Determining granularity – Test sieves, nominal opening dimensions - NF EN 933-2 - 1996
- Cement – Part 1: composition, specifications and conformity criteria for common cements - NF...
Patents
Directory
Départemento de Construcciones. Anquitectonicas e Ingenieria de la Construccion y del Terreno http://www.ubu.es
GeM, UMR CNRS 6183 Research Institute on Civil Engineering and Mechanics University of Nantes – IVT Saint Nazaire http://gem.ec-nantes.fr
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