Durability of high-volume fly ash concrete

Author(s): A. Camões
Paper category: Workshop
Book title: International RILEM Workshop on Performance Based Evaluation and Indicators for Concrete Durability
Editor(s): V. Baroghel-Bouny, C. Andrade, R. Torrent, K. Scrivener
ISBN: 978-2-912143-95-2
Pages: 311 - 318
Total Pages: 8
Language: English

Abstract: 
It is well known that the concrete industry has to contribute to the sustainability of construction. For this intent it is necessary to reduce the cement production and consequently its demand without compromising the durability requirements of the concrete constructions. Therefore, large-scale cement replacement in concrete by by-products such as fly ash will be extremely beneficial from the overall ecological and environmental point of view.
In this context, an experimental research work was carried out focused on the evaluation of the possibility of producing low cost concrete with enhanced or even high performance, including local low quality materials such as fly ash and common crushed aggregates without any previous treatment, i.e., as received. Three different concrete mixtures - incorporating large quantities of fly ash - were made and their mechanical, workability and durability properties were characterized. The total binder used (400 kg/m³, 500 kg/m³ and 600 kg/m³) was composed by 40% of portland cement and 60% of fly ash by mass of the total cementitious material.
The overall results obtained show that the compressive strength requirements, in general, are not a problem and that these concretes are highly durable. Thus, using this type of concrete it is possible to build more durable structures and one can contribute to the construction sustainability.

Online publication: 2007
Publication Type: full_text
Public price (Euros): 0.00