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Title: Reactive pozzolana from Indian clays-their use in cement mortars

Abstract

Studies were undertaken to produce reactive pozzolana i.e. metakaolin from four kaolinitic clays collected from different sources in India. The metakaolin produced from these clays at 700-800 deg. C show lime reactivity in between 10.5 to 11.5 N/mm{sup 2} which is equivalent to commercially available calcined clay Metacem-85. The microstructure of the metakaolin has been reported. The effect of addition of metakaolin up to 25% in the Portland cement mortars was investigated. An increase in compressive strength and decrease of porosity and pore diameter of cement mortars containing metakaolin (10%) was noted over the cement mortars without metakaolin. The hydration of metakaolin blended cement mortars was investigated by differential thermal analysis (DTA) and scanning electron microscopy (SEM). The major hydraulic products like C-S-H and C{sub 4}AH{sub 13} have been identified. Durability of the cement mortars with and without metakaolin was examined in different sulphate solutions. Data show better strength achievement in cement mortars containing 10% MK than the OPC mortars alone.

Authors:
 [1];  [1]
  1. Environmental S and T Division, Central Building Research Institute, Roorkee-247667, Uttranchal State (India)
Publication Date:
OSTI Identifier:
20871541
Resource Type:
Journal Article
Journal Name:
Cement and Concrete Research
Additional Journal Information:
Journal Volume: 36; Journal Issue: 10; Other Information: DOI: 10.1016/j.cemconres.2004.12.002; PII: S0008-8846(04)00512-5; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0008-8846
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CALCIUM SILICATES; CLAYS; COMPRESSION STRENGTH; DIFFERENTIAL THERMAL ANALYSIS; HYDRATES; HYDRATION; MICROSTRUCTURE; MORTARS; POROSITY; PORTLAND CEMENT; SCANNING ELECTRON MICROSCOPY; TEMPERATURE RANGE 0400-1000 K; TEMPERATURE RANGE 1000-4000 K

Citation Formats

Singh, Manjit, and Garg, Mridul. Reactive pozzolana from Indian clays-their use in cement mortars. United States: N. p., 2006. Web. doi:10.1016/j.cemconres.2004.12.002.
Singh, Manjit, & Garg, Mridul. Reactive pozzolana from Indian clays-their use in cement mortars. United States. https://doi.org/10.1016/j.cemconres.2004.12.002
Singh, Manjit, and Garg, Mridul. 2006. "Reactive pozzolana from Indian clays-their use in cement mortars". United States. https://doi.org/10.1016/j.cemconres.2004.12.002.
@article{osti_20871541,
title = {Reactive pozzolana from Indian clays-their use in cement mortars},
author = {Singh, Manjit and Garg, Mridul},
abstractNote = {Studies were undertaken to produce reactive pozzolana i.e. metakaolin from four kaolinitic clays collected from different sources in India. The metakaolin produced from these clays at 700-800 deg. C show lime reactivity in between 10.5 to 11.5 N/mm{sup 2} which is equivalent to commercially available calcined clay Metacem-85. The microstructure of the metakaolin has been reported. The effect of addition of metakaolin up to 25% in the Portland cement mortars was investigated. An increase in compressive strength and decrease of porosity and pore diameter of cement mortars containing metakaolin (10%) was noted over the cement mortars without metakaolin. The hydration of metakaolin blended cement mortars was investigated by differential thermal analysis (DTA) and scanning electron microscopy (SEM). The major hydraulic products like C-S-H and C{sub 4}AH{sub 13} have been identified. Durability of the cement mortars with and without metakaolin was examined in different sulphate solutions. Data show better strength achievement in cement mortars containing 10% MK than the OPC mortars alone.},
doi = {10.1016/j.cemconres.2004.12.002},
url = {https://www.osti.gov/biblio/20871541}, journal = {Cement and Concrete Research},
issn = {0008-8846},
number = 10,
volume = 36,
place = {United States},
year = {Sun Oct 15 00:00:00 EDT 2006},
month = {Sun Oct 15 00:00:00 EDT 2006}
}