Effect of heat treatment on pozzolanic activity of volcanic pumice used as cementitious material

Kilic A., Sertabipoglu Z.

CEMENT & CONCRETE COMPOSITES, cilt.57, ss.128-132, 2015 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 57
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1016/j.cemconcomp.2014.12.006
  • Dergi Adı: CEMENT & CONCRETE COMPOSITES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.128-132
  • İstanbul Üniversitesi Adresli: Evet

Özet

Volcanic pumice (VP) is a highly vesicular material derived from acidic lavas. It substantially contains amorphous silica, and widely used in many industry, such as construction, textile, chemical and agricultural industries, due to its physical properties. The study is aimed to evaluate the suitability of finely ground (-20 mu m) and/or heated (at 1000 degrees C) volcanic pumice powder to be used as a supplementary cementitious material. Mortar cylinders were prepared using finely ground natural pumice powder, and heated (1000 degrees C) pumice powder (0-20%) at different mixes ratios as cement replacement. The results from this study showed that the heat treatment significantly affected the pozzolanic activity of VP, and use of heated-ground pumice as a supplementary cementitious material increased the strength of mortar up to 7% in 90 days as well as 7- and, 28-day strengths. (C) 2015 Elsevier Ltd. All rights reserved.