The effect of high temperature on lightweight concretes produced with colemanite coated pumice aggregates
| Autor: | Özlem Salli Bideci |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Aggregate (composite)
Materials science 0211 other engineering and technologies Mechanical testing 020101 civil engineering 02 engineering and technology Building and Construction Colemanite 0201 civil engineering SEM-EDS Pumice Compressive strength High-temperature properties Ultrasonic pulse velocity 021105 building & construction General Materials Science Composite material Civil and Structural Engineering |
| Zdroj: | Construction and Building Materials. 113:631-640 |
| ISSN: | 0950-0618 |
| DOI: | 10.1016/j.conbuildmat.2016.03.113 |
| Popis: | SALLI BIDECI, Ozlem/0000-0002-9699-6003 WOS: 000375817400065 Concrete is a non-combustible material. But it is known to have serious changes in its physical, chemical and mechanical properties when exposed to high temperatures. In this study, the surface of large pumice aggregate was coated with cement + colemanite (CLM) dual mixtures (0%, 7.5%, 12.5% and 17.5%). Lightweight concretes were produced by using coated aggregates. Then by exposing to temperatures at 20 degrees C (Control), 200 degrees C, 400 degrees C and 600 degrees C, the unit weight, compressive strength, ultrasonic pulse velocity and weight loss of concrete samples were determined. Also, in order to identify the internal structural properties of the samples, DTA-TGA and SEM-EDS analysis were performed. As a result of the study, the optimum value was obtained from 12.5-CLM samples. It is determined that the lightweight concretes that would be produced with pumice aggregates coated with cement + colemanite dual mixture would have a high performance against high temperature. (C) 2016 Elsevier Ltd. All rights reserved. |
| Databáze: | OpenAIRE |
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