97/02819 Potential use of fly ash in Colombian blended cements

• Publisher: Elsevier Science
• Year: 1997
• Weight: 204 KB
• Volume: 38
• Category: Article
• ISSN: 0140-6701
• DOI: 10.1016/s0140-6701(97)84703-0

✦ Synopsis

By-products related to fuels 97102816

New knowledge about effects of bituminous coal fly ash in concrete Haerdtl, R. ef al. VGB Krafiwerkstech., 1996, 76, (II), 953-956. (In German) The results of studies into the reaction of bituminous coal fly ash in concrete are reported, with specific focus on the mechanisms during the pozzolanic reaction of the fly ash and the resulting changes to the concrete structure. The investigation covered eight different cements representing the types of cement most commonly used in Germany.

97102817

Performance and durability of concrete made with demolition waste and artificial fly ash-clay aggregates Zakaria, M. and Cabrera, J. G. Wusre Wanage, 1996, 16, (l-3), 151-158. Two replacements of natural aggregates under consideration for concrete production are demolition aggregates and artificial aggregates made with waste materials. A laboratory study on the use of demolition waste and artificial aggregates made from fly ash-clay mixtures as coarse aggregates to make concrete is presented. The concretes made either with demolition waste or artificial aggregates are compared with a control mix made with natural gravel aggregates.

The strength and durability characteristics of these concretes are evaluated using as a criteria compressive strength and transport properties. Concretes of good performance and durability can be produced using aggregates from demolition rubble or using artificial aggregates made with wastes such as fly ash.