Influence of Calcium Stearate Ca(C₁₈H₃₅O₂)₂ on the Properties of Fine-Grained Concrete

Abstract:

The article presents experimental data obtained during the use of powdered calcium stearate and its suspension as bulk water repellents for fine-grained concrete. The use of powdered calcium stearate in an amount of 0.5% of the mass of cement led to an increase in air intake by 1.7 times, mobility by 8.5%, and a decrease in density by 2.5% compared to similar indicators of a concrete mixture without a water repellent. Powdered calcium stearate had no significant effect on compressive strength and flexural strength. With the introduction of CS in the form of a suspension and a powder in an amount of 0.5%, the capillary water absorption was reduced by 3 times, the water absorption by weight after the first day was 19% less than that of the samples without the additive. During the first day, water absorption for samples with a suspension of CS in an amount of 0.5% was 8.8%, for samples with CS powder - 7.6%. The highest water absorption is typical for samples without a hydrophobization and was equal to 9.3%, the lowest for samples with an CS suspension in the amount of 1.5% –4.4%. The introduction of a suspension of calcium stearate in an amount of 0.5% by weight of cement led to an increase in air entrainment by 2.1 times, a decrease in density by 4%, and a decrease in mobility by 5% compared to the samples without additive.

• Periodical: Solid State Phenomena (Volume 334)
• Pages: 259-271
• DOI: https://doi.org/10.4028/p-ziibv0
• Online since: July 2022
• Authors: Vadim Soloviev*, Victoria Shvetsova
• Keywords: Calcium Stearate, Fine-Grained Concrete, Suspension of Calcium Stearate, Water Absorption

References

[1] ACI Committe 212, Report on Chemical Admixture for Concrete ACI 212.3R-10, 46-50. Available online: https://www.penetron.com/uploads/pdf/Penetro-ACI212-3R-10-Chapter15-PRA.pdf (accessed on 22 February 2021).

[2] Zhichao Liu, Will Hansen: Effect of hydrophobic surface treatment on freeze-thaw durability of concrete. Cement and Concrete Composites. 69 (2016) pp.49-60.

DOI: 10.1016/j.cemconcomp.2016.03.001

[3] A. Lagazzoa, S. Vicinib, C. Cattaneoc, R. Bottera, Effect of fatty acid soap on microstructure of lime-cement mortar, Construction and Building Materials. 116 (2016) pp.384-390.

DOI: 10.1016/j.conbuildmat.2016.04.122

[4] Marcos Lanzóna, P.A. García-Ruizb.: Evaluation of capillary water absorption in rendering mortars made with powdered waterproofing additives. Construction and Building Materials. 23(10) (2009). pp.3287-3291.

DOI: 10.1016/j.conbuildmat.2009.05.002

[5] Mehdi Nemati Chari, Ramin Naseroleslami, Mohammad Shekarchi: The impact of calcium stearate on characteristics of concrete. Asian Journal of Civil Engineering. 20(2019) p.1007–1020.

DOI: 10.1007/s42107-019-00161-x

[6] Maryoto A., Gan B.S., Hermanto N.I.S., Setijadi R: Effect of Calcium Stearate in the Mechanical and Physical Properties of Concrete with PCC and Fly Ash as Binders. Materials. 13(6) (2020).

DOI: 10.3390/ma13061394

[7] Higerovich M.I. Hidrofobnyi cement [Hydrophobic cement]. М.: Promstroiizdat, p.208 (1957).

[8] Marcos Lanzóna, P.A. García-Ruizb. Effectiveness and durability evaluation of rendering mortars made with metallic soaps and powdered silicone. Construction and Building Materials. 22(12) (2008) pp.2308-2315.

DOI: 10.1016/j.conbuildmat.2007.10.001

[9] Korovkin M.O., Eroshkina N.A., Teplova M.F., Korovchenko I.V. Study of the kinetics of water absorption of fine-grained concrete. Molodoi uchonyi [Young scientist]. 13(93) (2015) pp.132-134.

[10] Ramin Naseroleslamia, Mehdi Nemati Charib. The effects of calcium stearate on mechanical and durability aspects of self-consolidating concretes incorporating silica fume/natural zeolite. Construction and Building Materials. 225(2019) pp.384-400.

DOI: 10.1016/j.conbuildmat.2019.07.144

[11] Maryoto A. Resistance of concrete with calcium stearate due to chloride attack tested by accelerated corrosion. Procedia Engineering. 171 (2017) p.511 – 516.

DOI: 10.1016/j.proeng.2017.01.363

[12] Maryoto А. Improving microstructures of concrete using Ca(C18H35O2)2. Procedia Engineering. 125 (2015) p.631 – 637.

DOI: 10.1016/j.proeng.2015.11.086

[13] Maryoto A., Setijadi R., Widyaningrum A., Waluyo S. Drying Shrinkage of Concrete Containing Calcium Stearate, (Ca(C18H35O2)2), with Ordinary Portland Cement (OPC) as a Binder: Experimental and Modelling Studies. Molecules. 25 (2020).

DOI: 10.3390/molecules25214880

[14] Moroz M.N., Kalashnikov V.I., Ibragimov R.A. Vysokohidrofobnye stroitel'nye materialy [Highly hydrophobic building materials]. Penza: publishing house PGUAS.

[15] Antonio J. Jr. Aldikievich, Antonio J. Jr. Aldikievich, Arnon Bentour, Neil S. Burke, Chia-Chih Ou. Fully waterproof concrete. Patent № 2382744. Dec.10.11.08; Pub. 27.02.10, Bul.№6.

[16] O.V. Suzdaltsev. Durable architectural and decorative powder-activated concretes with the use of waste stone crushing rocks. Dissertation for the degree of candidate of technical sciences. Penza. P. 237 (2015).

[17] F. Tittarelli. Oxygen diffusion through hydrophobic cement-based materials. Cement and Concrete Research. 39(10) (2009) pp.924-928.

DOI: 10.1016/j.cemconres.2009.06.021

[18] Athanasios Malakopoulos, Manolis Chatzigeorgiou, Nikos Boukos, Athanasios Salifoglou. Durability performance of Portland limestone cement mortar containing butyl and zinc stearate admixtures. Materials and Structures. 54 (2021).

DOI: 10.1617/s11527-021-01638-5

[19] Zhiming Ma, Folker H. Wittmann, Jianzhuang Xiao, Tiejun Zhao. Influence of freeze-thaw cycles on properties of Integral Water Repellent Concrete. Journal of Wuhan University of Technology-Mater. 31 (2016) p.851–856.

DOI: 10.1007/s11595-016-1458-9

[20] Stupakov G.I. Betony na melkozernistyh peskah dlya promyshlennogo i grazhdanskogo stroitel'stva [Fine-grained concretes for industrial and civil construction]. Tashkent: FAN. P.107 (1986).