Thermal expansion coefficient of cellular lightweight concrete
Article Sidebar
Main Article Content
Abstract
This research studied the thermal expansion coefficient and air void content of the cellular lightweight concrete. The tests were carried out for the concrete at the design unit weight of 1600 and 1800 kilograms per cubic meter using the ratio of sand to cement 2:1 and 3:1 and adding the superplasticizer agent at 0, 0.5 and 1 percent of cement weight. The 12 designed mixes, 6 samples for each mix, a total of 72 samples were produced and cured in the air for 28 days. The thermal expansion coefficient tests were carried out according to the TI-B 101 Test Method Expansion Standard. The results shown that (1) for the cellular lightweight concrete with unit weight 1600 kilograms per cubic meter, the coefficients of expansion due to the heat are found in the range of (10.6-13.7) x10-6 per degree Celsius and (2) for the cellular lightweight concrete with unit weight 1800 kilograms per cubic meter, the coefficients of expansion due to the heat are found in the range of (12.5-15.8) x10-6 per degree Celsius. The air void content tests were carried out according to ASTM138 Gravimetric method. The test results for air void content showed that, at unit weights of 1600 and 1800 kilograms per cubic meter, the cellular lightweight concrete contained air voids in the range of approximately 27–32.3% and 19.2–23.8%, respectively.
Article Details
References
Narayanan N, Ramamurthy K. Structure and properties of aerated concrete: a review. Cement and Concrete Composites. 2000;22(5):321–329.
Jones MR, McCarthy A. Preliminary views on the potential of foamed concrete as a structural material. Magazine of Concrete Research. 2005;57(1):21–31.
Ramamurthy K, Kunhanandan Nambiar EK, Indu Siva Ranjani G. A classification of studies on properties of foam concrete. Cement and Concrete Composites. 2009;31(6):388–396.
Siddiqui MS, Fowler DW. A systematic optimization technique for the coefficient of thermal expansion of Portland cement concrete. Construction and Building Materials. 2015;88:204–211.
Mallela J, Abbas A, Harman T, Rao C, Liu R, Darter M. Measurement and significance of the coefficient of thermal expansion of concrete in rigid pavement design. Transportation Research Record: Journal of the Transportation Research Board. 2005;1919(1):38–46.
Tanesi J, Kutay M, Abbas A, Meininger R. Effect of coefficient of thermal expansion test variability on concrete pavement performance as predicted by mechanistic-empirical pavement design guide. Transportation Research Record: Journal of the Transportation Research Board. 2007;2020(1):40–44. doi:10.3141/2020-05.
Federal Highway Administration. Coefficient of thermal expansion in concrete pavement design. FHWA-HIF-09-015. Washington (DC): U.S. Department of Transportation, Federal Highway Administration; 2011.
Sakyi-Bekoe K. Assessment of the coefficient of thermal expansion of Alabama concrete. Auburn (AL): Auburn University; 2008. Master's thesis.
Mukhopadhyay AK, Neekhra S, Zollinger DG. Preliminary characterization of aggregate coefficient of thermal expansion and gradation for paving concrete. Report No. 0-1700-5. Texas: Texas Transportation Institute; 2007.
Mehta PK, Monteiro PJM. Concrete: microstructure, properties, and materials. 4th ed. New York (NY): McGraw-Hill Education; 2014.
Siddiqui MS, Fowler DW. Optimizing coefficient of thermal expansion of concrete and its importance on concrete structures. In: Proceedings of the International Conference on Construction Materials and Structures (ICCMATS 2014). Johannesburg, South Africa; 2014. doi:10.3233/978-1-61499-466-4-47.
Amonamarittakul S, Choktaweekarn P, Sancharoen P, Tangtermsirikul S. A study of the coefficient of thermal expansion of paste, mortar and concrete. Research and Development Journal. 2011;22(4).
Danish Technological Institute. TI-B 101 Test Method: Expansion Coefficient of Concrete. Taastrup: Danish Technological Institute, Building Technology.
ASTM International. ASTM C138/C138M Standard test method for density (unit weight), yield, and air content (gravimetric) of concrete. West Conshohocken (PA): ASTM International.
ASTM International. ASTM C1611/C1611M Standard test method for slump flow of self-consolidating concrete. West Conshohocken (PA): ASTM International.
Neville AM. Properties of concrete. 5th ed. Harlow, England: Pearson Education; 2011.
Zhou C, Huang B, Shu X. Micromechanical model for predicting coefficient of thermal expansion of concrete. Journal of Materials in Civil Engineering. 2013;25(9):1171–1180.
Wang H, Hellmich C, Yuan Y, Mang H, Pichler B. May reversible water uptake/release by hydrates explain the thermal expansion of cement paste? Arguments from an inverse multiscale analysis. Cement and Concrete Research. 2018;113:13–26. doi:10.1016/j.cemconres.2018.05.008.
ACI Committee 209. Prediction of creep, shrinkage, and temperature effects in concrete structures. ACI 209R-92. Farmington Hills (MI): American Concrete Institute; 1992.
