A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Heat transfer evaluation of coating mortars containing expanded vermiculite as fine aggregate
Abstract The continuous search for improved thermal confort and energy efficient buildings has driving forward the study of construction materials with low heat transfer. The present work evaluated the thermal characteristics of coating mortars containing partial replacements of sand by expanded vermiculite, as well as the understanding of the temperature flow through masonry samples constituted by ceramic bricks coated with alternative mortars 1:1:6 (cement: lime: sand). A lab apparatus was assembled to simulate the heat incidence and transfer through mansory samples by registering the temperature at different points of the mansory surfaces. In addition, the thermal performance of the mortars was characterized in the fresh and hardened states using the KD-2 Pro device. The results showed that replacing sand by expanded vermiculite increased the void index and reduced the thermal conductivity of the mortars. The temperature gradient between the opposite faces of the mansory increased from 25 °C to 34 °C after 3 hours of testing, by replacing 45% of sand by expanded vermiculite. No significantly effect on the mechanical properties of the materials was observed.
Highlights Construction materials with low heat transfer contribute to energy efficiency. Expanded vermiculite can partially replace sand in low heat transfer coating mortars. The presence of expanded vermiculite increased the temperature gradient through coated masonry.
Heat transfer evaluation of coating mortars containing expanded vermiculite as fine aggregate
Abstract The continuous search for improved thermal confort and energy efficient buildings has driving forward the study of construction materials with low heat transfer. The present work evaluated the thermal characteristics of coating mortars containing partial replacements of sand by expanded vermiculite, as well as the understanding of the temperature flow through masonry samples constituted by ceramic bricks coated with alternative mortars 1:1:6 (cement: lime: sand). A lab apparatus was assembled to simulate the heat incidence and transfer through mansory samples by registering the temperature at different points of the mansory surfaces. In addition, the thermal performance of the mortars was characterized in the fresh and hardened states using the KD-2 Pro device. The results showed that replacing sand by expanded vermiculite increased the void index and reduced the thermal conductivity of the mortars. The temperature gradient between the opposite faces of the mansory increased from 25 °C to 34 °C after 3 hours of testing, by replacing 45% of sand by expanded vermiculite. No significantly effect on the mechanical properties of the materials was observed.
Highlights Construction materials with low heat transfer contribute to energy efficiency. Expanded vermiculite can partially replace sand in low heat transfer coating mortars. The presence of expanded vermiculite increased the temperature gradient through coated masonry.
Heat transfer evaluation of coating mortars containing expanded vermiculite as fine aggregate
Guilherme, Deize D.P. (author) / Cabral, Kleber C. (author) / Souza, Wendell R.M. (author) / Martinelli, Antonio Eduardo (author)
2024-01-10
Article (Journal)
Electronic Resource
English
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