The Effect of NH-1 Set Accelerator on the Fresh Properties and Mechanical Test Results of 1000 kg/m³ Foam Concrete
Received: 2 June 2025 | Revised: 17 June 2025 and 29 June 2025 | Accepted: 7 July 2025 | Online: 6 October 2025
Corresponding author: Ali Issa Hanfoosh
Abstract
This study investigates the effect of the NH-1 set accelerator on the fresh and hardened properties of foam concrete with a target wet density of 1000 kg/m³. Four mixes were prepared with NH-1 dosage levels of 0%, 1%, 2%, and 3% by weight of binder. The fresh and mechanical properties, including workability, setting time, compressive strength, flexural strength, and splitting tensile strength, were evaluated at 7 and 28 days. The mixed design incorporated additives to improve its stability and mechanical integrity, including a foaming agent and reinforcing fibers. The results showed that increasing the NH-1 content reduced the setting time and improved the early-age mechanical strength. The optimum performance was observed at 2% NH-1, which exhibited the highest compressive and flexural strength. The findings suggest that NH-1 effectively enhances the foam concrete performance when optimized.
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References
B. Raj, D. Sathyan, M. K. Madhavan, and A. Raj, "Mechanical and durability properties of hybrid fiber reinforced foam concrete," Construction and Building Materials, vol. 245, Jun. 2020, Art. no. 118373.
X. G. Yu et al., "Influence of Testing Methods on Setting Time of Foam Concrete," Advanced Materials Research, vol. 177, pp. 514–517, 2011.
J. Wei, T. Wang, Y. Zhong, Y. Zhang, and C. K. Y. Leung, "Performance Evaluation of Foamed Concrete with Lightweight Aggregate: Strength, Shrinkage, and Thermal Conductivity," Materials, vol. 17, no. 15, Jan. 2024, Art. no. 3869.
D. Zhang et al., "Development of a Novel Type of Liquid Accelerator Based on Aluminum Sulfate and Its Accelerating Mechanism for Cement Hydration," Journal of Materials in Civil Engineering, vol. 36, no. 1, Jan. 2024, Art. no. 04023517.
IQS No. 5/2019 Portland Cement. Iraq: Iraqi Standard Specification, 2019.
M. Badawi, A. G. Ahmed, T. A. Eldamaty, and M. M. Helal, "The Effect of Polypropylene Fibers on the Fracture Characteristics of Lightweight Aggregate Crumb Rubber Concrete Composites," Engineering, Technology & Applied Science Research, vol. 13, no. 3, pp. 10638–10645, Jun. 2023.
G. Zhou and R. K. L. Su, "A Review on Durability of Foam Concrete," Buildings, vol. 13, no. 7, Jul. 2023, Art. no. 1880.
S. K. Shill, E. O. Garcez, S. Al-Deen, and M. Subhani, "Influence of Foam Content and Concentration on the Physical and Mechanical Properties of Foam Concrete," Applied Sciences, vol. 14, no. 18, Jan. 2024, Art. no. 8385.
R. J. Sldozian, A. G. Tkachev, I. V. Burakova, and Z. A. Mikhаleva, "Improve the mechanical properties of lightweight foamed concrete by using nanomodified sand," Journal of Building Engineering, vol. 34, Feb. 2021, Art. no. 101923.
Iraqi Specifications No. (45), 1984 for Aggregates of Natural Resources used for Concrete and Construction. Iraq: Iraqi Standard Specification, 1984.
Iraqi Standard Specification, No. 1703, Water used in concrete. Iraq: Iraqi Standard Specification, 1992.
ASTM C796-97 Standard Test Method for Foaming Agents for Use in Producing Cellular Concrete Using Preformed Foam. USA: ASTM International, 1997.
ASTM C494/C494M-19e1 Standard Specification for Chemical Admixtures for Concrete. USA: ASTM International, 2019.
BS EN 12390 3:2019 Testing hardened concrete Part 3: Compressive strength of test specimens. UK: British Standards Institution, 2019.
BS EN 12390-6-2009 - Testing Hardened Concrete Part 6 - Tensile Splitting Strength of Test Specimens. UK: British Standards Institution, 2009.
BS EN 12390-5-2009 Part 5 Flexural Strength of Test Specimens. UK: British Standards Institution, 2009.
BS EN 12390 7:2019 Testing hardened concrete Part 7: Density of hardened concrete. UK: British Standards Institution, 2019.
BS 1881-122:1983 Testing concrete - Method for determination of water absorption. UK: British Standards Institution, 1983.
H. Awang, Z. S. Aljoumaily, N. Noordin, and M. Z. Al-Mulali, "The Mechanical Properties of Foamed Concrete containing Un-processed Blast Furnace Slag," MATEC Web of Conferences, vol. 15, 2014, Art. no. 01034.
M. Amran et al., "Fibre-Reinforced Foamed Concretes: A Review," Materials, vol. 13, no. 19, Sep. 2020, Art. no. 4323.
R. K. M. Jawad, M. J. Kadhim, and H. M. Kamal, "A Review of The Effect of Additives on the Mechanical Properties of Lightweight Concrete," Journal of Engineering and Sustainable Development, vol. 27, no. 6, pp. 713–724, Nov. 2023.
E. P. Kearsley and P. J. Wainwright, "The effect of high fly ash content on the compressive strength of foamed concrete," Cement and Concrete Research, vol. 31, no. 1, pp. 105–112, Jan. 2001.
E. Namsone, G. Šahmenko, and A. Korjakins, "Durability Properties of High Performance Foamed Concrete," Procedia Engineering, vol. 172, pp. 760–767, 2017.
N. Narayanan and K. Ramamurthy, "Structure and properties of aerated concrete: a review," Cement and Concrete Composites, vol. 22, no. 5, pp. 321–329, Oct. 2000.
A. W. Ali and N. M. Fawzi, "Production of Light Weight Foam Concrete with Sustainable Materials," Engineering, Technology & Applied Science Research, vol. 11, no. 5, pp. 7647–7652, Oct. 2021.
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Copyright (c) 2025 Ali Issa Hanfoosh, Mohammed Zuhear Al-Mulali
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