POZZOLANIC CHARACTERISTICS OF A NATURAL RAW MATERIAL FOR USE IN BLENDED CEMENTS


Alp İ., Deveci H., Sungun Y. H., Yılmaz A. H., Kesimal A., Yılmaz E.

IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY TRANSACTION B-ENGINEERING, vol.33, pp.291-300, 2009 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 33
  • Publication Date: 2009
  • Journal Name: IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY TRANSACTION B-ENGINEERING
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.291-300
  • Keywords: Pozzolan, blended cement, physical properties, mechanical properties, PORTLAND-CEMENT, SULFATE RESISTANCE, FLY-ASH, CONCRETE, HYDRATION, PASTES, DURABILITY, TURKEY, TUFFS, PLAIN
  • Recep Tayyip Erdoğan University Affiliated: No

Abstract

In this study, the potential use of a natural raw material in the manufacture of blended cements was investigated. Mineralogical, petrographic and chemical analyses of the samples showed that the natural raw material was a porphyritic volcanic rock close to trachyandesite composition with a SiO(2)+Al(2)O(3)+Fe(2)O(3) content of 79.86%. Further experiments were also designed to determine the physical properties and pozzolanic activity of the raw material. The mortar samples, made with a binder of ground trachyandesite and lime, developed compressive and flexural strengths of 2.5 and 3.3 times respectively higher than those required for a natural pozzolan. Further tests revealed that when the ground trachyandesite replaced 30% w/w of Portland cement, the blended cements produced had the desired physical and chemical characteristics with compressive strengths higher than 32.9 N/mm(2). These findings suggest that this material can be used in the production of blended cements.