PROPERTIES OF FRESH AND HARDENED MORTARS WITH AIR-ENTRAINING AGENT

2022;
: 105-110
https://doi.org/10.23939/jtbp2022.02.105
Received: September 26, 2022
Revised: October 28, 2022
Accepted: November 15, 2022
Authors:
1
Lviv Polytechnic National University, Department of Building Production

The influence of the air-entraining agent (AEA) on a density, the volume of entrained air of mortar mix and compressive strength of hardened mortar was studied in this article. Results show that the addition of AEA results in the reduction of water to cement ratio to provide the targeted flow and the density that depends on the volume of entrained air. The addition of AEA causes the decrease of the density of mortar (C:S=1:2) by 8,2% and the increase of the compressive strength by 13,9% after 28 days of hardening compared to the mortar (C:S=1:2) without AEA. The further increase of a sand content in a mortar (C:S=1:3) results in slight decrease of a density of fresh mortar and compressive strength. If C:S ratio is 1:4 the increase of the density and the compressive strength decrease is observed in comparison with the mortar with C:S=1:3. The obtained results show that properties of mortar incorporating AEA depend on its mix proportion.

Aitcin, P., Flatt, R.J. (Eds.). (2015). Science and Technology of Concrete Admixtures, first ed., Woodhead Publishing, Oxford, United Kingdom.

Atahan, H.N., Carlos, Jr. C., Chae, S., Monteiro, P.J.M., Bastacky, J. (2008). The morphology of entrained air voids in hardened cement paste generated with different anionic surfactants, Cement and Concrete Composites 30 (7), 566–575, DOI: https://doi. org/10.1016/j.cemconcomp.2008.02.003.

Babiak, M., Ratajczak, M., Kulczewski, P., Kosno, J. (2018). Effect of Modern Air Entraining Admixtures on Physical Properties of Construction Mortars, In Materials Science Forum, Trans Tech Publications, Ltd, 923, 115–119, DOI: https://doi.org/10.4028/ www.scientific.net/msf.923.115

Blikharskyy, Z., Sobol, K., Markiv, T., Selejdak, J. (2021). Properties of Concretes Incorporating Recycling Waste and Corrosion Susceptibility of Reinforcing Steel Bars, Materials, 14(10), 2638, DOI: https://doi.org/10.3390/ma14102638.

Chatterji, S. (2003). Freezing of air-entrained cement-based materials and specific actions of air-entraining agents, Cement and Concrete Composites, 25(7), 759–765, DOI: https://doi.org/10.1016/S0958-9465(02)00099-9.

Coussy, O., Monteiro, P.J.M. (2008). Poroelastic model for concrete exposed to freezing temperatures, Cement and Concrete Research, 38, 40-48, DOI: https://doi.org/10.1016/j.cemconres.2007.06.006.

Cultrone, G., Sebastián E., Ortega Huertas, M. (2005). Forced and natural carbonation of lime-based mortars with and without additives: mineralogical and textural changes, Cement and Concrete Research, 35 (12), 2278–2289, DOI:https://doi.org/10.1016/j.cemconres.2004.12.012.

Dębska, B., Krasoń, J., Lichołai, L. (2020). The evaluation of the possible utilization of waste glass in sustainable mortars, Budownictwo o Zoptymalizowanym Potencjale Energetycznym, 9(2), 7–15, DOI:https://doi.org/10.17512/bozpe.2020.2.01

DSTU B V.2.7-114-2002: Building materials. Concrete mixtures. Methods of testing. Ukrarkhbudinform, Kyiv, Ukraine (2002).

DSTU B V.2.7-185:2009: Building materials. Cements. Methods of determination of normal thickness, setting time and soundness. Ukrarkhbudinform, Kyiv, Ukraine (2010).

DSTU B V.2.7-187:2009: Building materials. Cements. Methods of determination of bending and compression strength. Ukrarkhbudinform, Kyiv, Ukraine (2010).

DSTU B V.2.7-188:2009: Building materials. Cements. Methods of determination of fineness. Ukrarkhbudinform, Kyiv, Ukraine (2010).

DSTU B V.2.7-232:2010: Building materials. Sand for construction work testing methods. Kyiv, Ukraine (2010).

Du, L., Folliard, K.J., 2005. Mechanisms of air entrainment in concrete, Cement and Concrete Research, 35, 1463-1471, DOI: https://doi.org/10.1016/j.cemconres.2004.07.026.

Fonseca, P.C.; Scherer, G.W. (2015). An Image Analysis Procedure to Quantify the Air Void System of Mortar and Concrete. Materials and Structures, 48, 3087–3098, DOI:https://doi.org/10.1617/s11527-014-0381-9.

Jin, S.; Zhang, J.; Huang, B. (2013). Fractal Analysis of Effect of Air Void on Freeze–Thaw Resistance of Concrete. Construction and Building Materials, 47, 126–130, DOI:https://doi.org/10.1016/j.conbuildmat. 2013.04.040.

Markiv, T., Sobol, Kh., Franus, M., Franus, W. (2016). Mechanical and durability properties of concretes incorporating natural zeolite, Archives of Civil and Mechanical Engineering, 16, 554–562, DOI: https://doi.org/10.1016/j.acme.2016.03.013.