INFLUENCE OF DENSITY ON SHRINKAGE, FROST RESISTANCE AND THERMAL CONDUCTIVITY OF NON-AUTOCLAVED FOAM CONCRETE
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This paper investigates the operational properties of non-autoclaved foam concrete with density grades ranging from D400 to D600. Particular attention is given to shrinkage, frost resistance, and thermal conductivity as the key performance indicators affecting the durability and energy efficiency of foam concrete products. Experimental studies were conducted on compositions containing cement, fly ash, sodium sulfate, and chemical admixtures. The results showed that shrinkage values depend on density, curing conditions, and binder composition, while frost resistance decreases with decreasing density due to thinner inter-pore partitions. Thermal conductivity was found to decrease as density decreases, providing improved thermal insulation performance. The study demonstrates that achieving optimal operational properties requires a balanced relationship between density, strength, pore structure, and moisture resistance. The obtained results can be used for the development of energy-efficient and durable non-autoclaved foam concrete materials for building applications.
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1. Narayanan N., Ramamurthy K. Structure and properties of aerated concrete: a review // Cement and Concrete Composites. – 2000. – Vol. 22, No. 5. – Pp. 321–329.
2. Ramamurthy K., Nambiar E.K.K., Ranjani G.I.S. A classification of studies on properties of foam concrete // Cement and Concrete Composites. – 2009. – Vol. 31, No. 6. – Pp. 388–396.
3. Jones M.R., McCarthy A. Preliminary views on the potential of foamed concrete as a structural material // Magazine of Concrete Research. – 2005. – Vol. 57, No. 1. – Pp. 21–31.
4. Amran Y.H.M., Farzadnia N., Ali A.A.A. Properties and applications of foamed concrete: a review // Construction and Building Materials. – 2015. – Vol. 101. – Pp. 990–1005.
5. Nambiar E.K.K., Ramamurthy K. Models relating mixture composition to the density and strength of foam concrete using response surface methodology // Cement and Concrete Composites. – 2006. – Vol. 28. – Pp. 752–760.
6. Hilal A.A., Thom N.H., Dawson A.R. On the properties of foamed concrete: a review of the literature // Construction and Building Materials. – 2015. – Vol. 88. – Pp. 1–11.
7. Mydin M.A.O. Experimental investigation on engineering properties of lightweight foamed concrete // Journal of Engineering Science and Technology. – 2011. – Vol. 6, No. 1. – Pp. 45–59.
8. ASTM C796/C796M-19. Standard Test Method for Foaming Agents for Use in Producing Cellular Concrete Using Preformed Foam. – ASTM International, West Conshohocken, PA, USA, 2019.
9. ASTM C666/C666M-15. Standard Test Method for Resistance of Concrete to Rapid Freezing and Thawing. – ASTM International, 2015.
10. EN 12667:2001. Thermal Performance of Building Materials and Products – Determination of Thermal Resistance by Means of Guarded Hot Plate and Heat Flow Meter Methods. – European Committee for Standardization, Brussels, 2001.