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Chemical and thermal activation of perlite-containing cementitious mixtures
Date
2010-12-01
Author
Saǧlik, Asli Ünsal
Erdoğan, Sinan Turhan
Metadata
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Perlite is a volcanic mineral abundant in Turkey, China, Japan, the US and several EU countries. Expanded perlite has been widely used in producing lightweight concrete. Recent research suggests the use of ground perlite as a pozzolan to partially replace cement. This study investigates strength properties of high-volume perlite mixtures and the influence of chemical and thermal activation on their strengths at early and later ages. Both activation types can increase early-strength gain rates and strength values achieved by pure portland cement mixtures can be exceeded in as early as 28 days with some activators and be maintained. Findings indicate that ground perlite is a successful natural pozzolan. Results also suggest that perlite-only mixtures can be activated to produce geopolymers. The consistency of its chemical composition compared to those of artificial pozzolans and its abundance in several developing countries makes perlite attractive for producing sustainable concretes with reduced carbon footprints.
Subject Keywords
Artificial pozzolan
,
Chemical compositions
,
EU countries
,
Expanded perlite
,
Natural pozzolan
,
Perlite mixtures
,
Sustainable concretes
URI
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84861394738&origin=inward
https://hdl.handle.net/11511/83467
Conference Name
2nd International Conference on Sustainable Construction Materials and Technologies (28 - 30 Haziran 2010)
Collections
Department of Civil Engineering, Conference / Seminar
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There are similar to 6700 million tons of perlite reserves in the world and two thirds of this amount takes place in Turkey. Although perlite possesses pozzolanic properties, it has not been so far used in producing blended cements. This study focuses on the use of natural perlites in blended cement production. For this purpose, after examining the suitability of the perlites as pozzolans and their case of grindability, 16 types of blended cements having 320 m(2)/kg or 370 m(2)/kg Blaine fineness were produ...
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Early-age activation of cement pastes and mortars containing ground perlite as a pozzolan
Erdoğan, Sinan Turhan (Elsevier BV, 2013-04-01)
Perlite is a natural pozzolan abundant in several countries which are major producers of cement. This makes perlite attractive for producing sustainable concretes. Strength development and heat evolution of perlite-containing mixtures, and the influence of chemical and thermal activation on their early and later age properties were investigated using five activator chemicals and four curing temperature-duration combinations. Chemical activation could increase the 1-day, or 3-day compressive strengths of 25%...
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Perlite is a volcanic rock that contains relatively high amounts of SiO2 and Al2O3. Due to its proper chemical composition and glassy structure, it can be used as a pozzolanic addition in blended cements. In this study, ground perlite was used as a cement replacement material in blended cements. Several mortar mixes were prepared to investigate the performance of those cements. The results showed that perlite incorporation caused early age strength losses when compared to the control mortars containing only...
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A. Ü. Saǧlik and S. T. Erdoğan, “Chemical and thermal activation of perlite-containing cementitious mixtures,” 2010, p. 1517, Accessed: 00, 2021. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84861394738&origin=inward.