Exploratory characterization of volcanic ash sourced from Uganda as a pozzolanic material in portland cement concrete

A. Buregyeya, G. Quercia Bianchi, P.R. Spiesz, M.V.A. Florea, R. Nassingwa

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Abstract

The need for alternative cementing materials to ordinary Portland cement (OPC) has promoted characterization research on pozzolana as an important ingredient in cement production. In Uganda, natural pozzolana application in cement production is done by only two producers of Portland cement and at a small scale due to capacity constraints. The capacity constraints, together with other technological issues, continue to hinder realization of the cost reduction and improved quality benefits attributed to the use of pozzolana as a mineral admixture in Portland cement concrete. There is high abundance of natural pozzolana in Uganda in the form of volcanic ash/tuffs which, if adequately characterized, can facilitate production of different cementing materials and increase output from the various players in the cement production industry in Uganda. This paper reviews methods of pozzolana characterisation and presents preliminary research findings on application of natural pozzolana sourced from Uganda in development of Portland cement concrete. Samples collected from two different deposits in the western region of Uganda were prepared and subjected to chemical analysis and tests on compressive strength, flexural strength and flow-ability. The preliminary findings are indicative of good quality pozzolanic materials that can be applied as mineral admixture in production of Portland cement concrete.
Original languageEnglish
Title of host publicationInternational Conference on Advances in Cement and Concrete Technology, 28-30 January 2013, Johannesburg, South Africa
EditorsH.C. Uzoegbo, W. Schmidt
Place of PublicationBerlin
PublisherBAM Federal Institute for Materials Research and Testing
Pages97-104
ISBN (Print)978-3-9815360-3-4
Publication statusPublished - 2013
Event1st International Conference on Advances in Cement and Concrete Technology in Africa (ACCTA 2013), January 28-30, 2013, Johannesburg, South Africa - Emperor’s Palace Resort, Johannesburg, South Africa
Duration: 28 Jan 201330 Jan 2013

Conference

Conference1st International Conference on Advances in Cement and Concrete Technology in Africa (ACCTA 2013), January 28-30, 2013, Johannesburg, South Africa
Abbreviated titleACCTA 2013
CountrySouth Africa
CityJohannesburg
Period28/01/1330/01/13

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