Comparative Investigations of some Properties Related to Durability of Cement Concretes Containing Different Fly Ashes

Abstract:

The results of research of mechanical properties and selected other characteristics influencing durability of cement concretes containing cement substitutes were presented. Cement concretes performed with conventional fly ash, fluidised fly ash and their mixture were investigated. The obtained results were compared with findings registered for two types of concrete performed without cement replacements and with cement concrete containing silica fume. The results have shown that cement concrete with predetermined 28-day compressive strength of about 50 MPa and good workability may be obtained using different cement replacements. Generally, these cement concretes exhibited also favorable properties related to concrete durability, i.e. low permeability and sorptivity, and significant reduction of chloride migration coefficient. Favourable results were obtained for cement concrete containing mix of conventional and fluidised fly ashes: good workability, compressive strength after 28th day exceeding 50 MPa, low permeability of water, and low sorptivity, as well as low coefficient of chloride migration. These features were similar as for cement concrete containing silica fume.

• Periodical: Advanced Materials Research (Volume 1054)
• Pages: 154-161
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1054.154
• Online since: October 2014
• Authors: Wojciech Kubissa*, Barbara Pacewska, Iwona Wilińska
• Keywords: Cement Substitutes, Compressive Strength, Concrete, Durability, Fly Ash, Permeability, Sorptivity, Water Absorption, Water Transport

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