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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Pitchstone Fines – A New Naturally Occurring Pozzolan from North Queensland
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Abstract:Global warming presents an ever-challenging battle to humankind, as emissions arising from industrially produced greenhouse gases are predicted to alter the long-term climatic patterns of earth. Harmful environmental emissions arising during the manufacture of Portland cements (C) can be effectively reduced by incorporating siliceous-aluminous based supplementary cementitious materials (SCMs), as partial cement replacements. In Australia, mined pitchstone fi nes (PF), derived as waste material from expandable perlite production, are a viable SCM for reducing cement consumption using an eco-friendly approach. This paper reports on the results of an experimental investigation into the pozzolanic activity of PF. Up to 40% cement was replaced with PF in mortar mixes. In addition, PF was used to partially replace sand. Strength activity index (SAI) values for PF were evaluated using accelerated 28-day compressive strengths for all PF substitution levels, with flows and wet densities of mortar mixes reported.
Concrete Institute of Australia, International Partner Access.
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