Comparison of Thermal Performance of Newly Produced Lightweight Wall and Roof Elements for Energy-efficient Buildings


In this study, both experimental and theoretical investigations are performed to obtain new concrete types with high thermal insulating characteristics for energy-efficient buildings. In this regard, 102 new concrete wall samples were produced using different aggregates at different volume fractions, and their thermophysical properties were tested according to EN and ASTM standards. The experimental research focused on developing new wall or roof types with higher thermal insulation properties in order to reduce the energy consumption of buildings due to heating or cooling. In order to specify the thermal performance of developed lightweight concretes, an analytical solution method is developed by the Complex Finite Fourier Transform (CFFT) method to estimate heat gain utilizing measured thermophysical properties data of those samples. The results indicated that the reduction in heat gain value was obtained as 83.21 % for the PC100 wall corresponding to conventional concrete. Consequently, the thermal insulation effect of those samples shows excellent potential for development.


Energy-efficient buildings, Concrete, Heat gain, Thermophysical properties, CFFT.

DOI: 10.17350/HJSE19030000167

Full Text: page_white_acrobat.png


Download data is not yet available.


1. Yumrutaş R, Kaşka Ö, Yıldırım E. Estimation of total equivalent
temperature difference values for multilayer walls and flat roofs
by using periodic solution. Building and Environment 42 (2007)

2. Bansal K, Chowdhury S, Gopal MR. Development of CLTD
values for buildings located in Kolkata, India. Applied Thermal
Engineering 28 (2008) 1127–1137.

3. Yumrutas R, Unsal M, Kanoglu M. Periodic solution of transient
heat flow through multilayer walls and flat roofs by complex finite
Fourier transform technique. Building and Environment 40 (2005)

4. Wang SK. Handbook of air conditioning and refrigeration,
McGraw-Hill, New York, 2001.

5. ASHRAE. ASHRAE handbook-fundamentals, ASHRAE, Atlanta,

6. Zainal OA, Yumrutas R. Validation of periodic solution for
computing CLTD (cooling load temperature difference) values for
building walls and flat roofs. Energy 82 (2015) 758–768.

7. ACI Committee 213. Guide for Structural Lightweight Aggregate
Concrete, American Concrete Institute ISBN: 978-0-87031-897-9,

8. Yunsheng X, Chung DDL. Effect of sand addition on the specific
heat and thermal conductivity of cement. Cement and Concrete
Research 30 (2000) 59–61.

9. Khan MI. Factors affecting the thermal properties of concrete and
applicability of its prediction models. Building and Environment
37 (2002) 607–614.

10. Kim K, Jeon S, Kim J, Yang S. An experimental study on thermal
conductivity of concrete. Cement and Concrete Research 33 (2003)

11. Chi JM, Huang R, Yang CC, Chang JJ. Effect of aggregate properties
on the strength and stiffness of lightweight concrete. Cement and
Concrete Composites 25 (2003) 197–205.

12. Howlader MK, Rashid MH, Mallick D, Haque T. Effects of
aggregate types on thermal properties of concrete. ARPN Journal
of Engineering and Applied Sciences 7 (2012) 900–907.

13. Różycka A, Waldemar P. Effect of perlite waste addition on the
properties of autoclaved aerated concrete. Construction and
Building Materials 120 (2016) 65-71.

14. Benazzouk A, Douzane O, Mezreb K, Laidoudi B, Que´neudec M.
Thermal conductivity of cement composites containing rubber
waste particles: Experimental study and modeling. Construction
and Building Materials 22 (2008) 573–579.

15. Kilincarslan Ş, Metin D, Mehmet A. The effect of pumice as
aggregate on the mechanical and thermal properties of foam
concrete. Arabian Journal of Geosciences 11 (2018) 289.

16. Liu MYJ, Alengaram UJ, Jumaat MZ, Mo KH. Liu. Evaluation of
thermal conductivity, mechanical and transport properties of
lightweight aggregate foamed geopolymer concrete. Energy and
Buildings 72 (2014) 238-245.

17. Yun TS, Jeong YJ, Han TS, Youm KS. Evaluation of thermal
conductivity for thermally insulated concretes. Energy and
Buildings 61 (2013) 125-132.

18. Paki T, Yesilata B. Physico-mechanical and thermal performances
of newly developed rubber-added bricks. Energy and Buildings 40
(2008) 679-688.

19. Somayaji, S. Civil Engineering Materials, Upper Saddle River:
Prentice Hall, ISBN 0-13-083906-X, p. 129, 2001.

20. Oktay H, Yumrutaş R, Akpolat A. Mechanical and thermophysical
properties of lightweight aggregate concretes. Construction and
Building Materials 96 (2015) 217–225.

21. BS 6073-1:1981. Precast concrete masonry units - Part 1:
Specification for precast concrete masonry units, British Standards
Institution, 1981.

22. Duffie JA, Beckman WA. Solar engineering of thermal process,
Wiley, New York, 1980.

23. ASM International Materials Properties Database Committee,
Thermal Properties of Metals, ISBN 0-87170-768-3, 2002.
How to Cite
Oktay, H., Yumrutas, R., & Argunhan, Z. (2020). Comparison of Thermal Performance of Newly Produced Lightweight Wall and Roof Elements for Energy-efficient Buildings. Hittite Journal of Science & Engineering, 7(1), 17-26. Retrieved from