Journal
MAGAZINE OF CONCRETE RESEARCH
Volume 71, Issue 2, Pages 95-107Publisher
ICE PUBLISHING
DOI: 10.1680/jmacr.17.00465
Keywords
aggregates; lightweight concrete; modelling
Funding
- German Federal Ministry of Education and Research (BMBF) [13XP5010B]
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [2016R1A6A3A03007804]
- National Centre for Research and Development within SEFIRCAOM (KONNECT Joint Call) [2/KONNECT/2016]
- National Research Foundation of Korea [2016R1A6A3A03007804] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Lightweight aggregate concrete is a material which has much lower density than normal concrete and many advantages, including advanced insulation performance due to its highly porous or cellular characteristics. Several types of lightweight aggregates have been used to produce lightweight aggregate concrete, and the characteristics of such lightweight aggregates strongly affect the material properties. In this study, three different expanded materials - expanded glass (Liaver), expanded clay (Liapor) and foam glass (Ecoglas) - were utilised as lightweight aggregates, and their effects on the properties of lightweight concrete were investigated. These expanded lightweight aggregates are light and have lower thermal conductivity as well as water absorption than those of normal aggregates. Microstructural characteristics of the specimens with different types of aggregate were examined using X-ray micro-computed tomography. The thermal (thermal conductivity) and mechanical (compressive strength) properties of the lightweight concrete specimens were evaluated experimentally and numerically. The relationship between the physical properties and characteristics was analysed to demonstrate the effect of each expanded aggregate on lightweight aggregate concrete.
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