Comparing environmental burdens, economic costs and thermal resistance of different materials for exterior building walls

Abstract. This paper presents the measurement results of three building wall materials which are commonly used for residential housings in Indonesia, namely clay brick, batako (concrete brick), and precast concrete. In-situ measurement of the steady state thermal flow (heat flux) at building walls (envelopes) is conducted in order to determine the thermal resistance of building wall according to ASTM C1155. The results show that all three building materials having a thermal resistance values are far below the energy conservation provisions of ASHRAE 90.1 and especially when compared to the provision of high performance green building ASHRAE 189.1 It is found that precast concrete has higher thermal resistance (or has lower thermal conductivity) than that of other two materials, hence a better compliance to the ASHRAE standards.

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A comparative assessment of the standardized methods for the in–situ measurement of the thermal resistance of building walls

Energy and Buildings ◽

10.1016/j.enbuild.2017.08.064 ◽

2017 ◽

Vol 154 ◽

pp. 198-206 ◽

Cited By ~ 25

Author(s):

Ioannis A. Atsonios ◽

Ioannis D. Mandilaras ◽

Dimos A. Kontogeorgos ◽

Maria A. Founti

Keyword(s):

Thermal Resistance ◽

Comparative Assessment ◽

In Situ Measurement ◽

Building Walls

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Measuring the thermal resistance of typical multi-layer building walls using the accelerated measurement method

MATEC Web of Conferences ◽

10.1051/matecconf/20165301020 ◽

2016 ◽

Vol 53 ◽

pp. 01020 ◽

Cited By ~ 1

Author(s):

Daniil Zubkov ◽

Alexander Chusov ◽

Dmitry Molodtsov

Keyword(s):

Thermal Resistance ◽

Measurement Method ◽

Building Walls

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Experimental works based on active and passive thermography for measuring the thermal resistance of building walls

10.21611/qirt.2020.145 ◽

2020 ◽

Author(s):

T.-T HA ◽

L. IBOS ◽

V. FEUILLET ◽

Y. GARCIA ◽

V. LE SANT ◽

...

Keyword(s):

Thermal Resistance ◽

Experimental Works ◽

Building Walls

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Effects of Vibration on the Preparation of Ultrathin Sections

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010007223x ◽

1973 ◽

Vol 31 ◽

pp. 358-359

Author(s):

Joseph M. Blum ◽

Edward P. Gargiulo ◽

J. R. Sawers

Keyword(s):

Cutting Speed ◽

Ground Level ◽

Environmental Vibration ◽

Block Face ◽

Ultrathin Sections ◽

Embedding Medium ◽

Thickness Variations ◽

Building Walls ◽

Cutting Direction ◽

Diamond Knife

It is now well-known that chatter (Figure 1) is caused by vibration between the microtome arm and the diamond knife. It is usually observed as a cyclical variation in “optical” density of an electron micrograph due to sample thickness variations perpendicular to the cutting direction. This vibration might be induced by using too large a block face, too large a clearance angle, excessive cutting speed, non-uniform embedding medium or microtome vibration. Another prominent cause is environmental vibration caused by inadequate building construction. Microtomes should be installed on firm, solid floors. The best floors are thick, ground-level concrete pads poured over a sand bed and isolated from the building walls. Even when these precautions are followed, we recommend an additional isolation pad placed on the top of a sturdy table.

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