1 Civil Eng. Dept., University of Technology, Baghdad, Iraq

2 Civil Eng. Dept., University of Technology, Baghdad, Iraq.


Decreasing the emissions of CO2 that come from vehicle exhaust, especially in car parking and tunnels, is so vital. CO2 emissions cause corrosion to a reinforcement of concrete. Thus, there is a need to provide a layer that protects the reinforcement from the reach of this harmful gas. This work goals to investigate the efficiency of using board units from Pozzolime concrete and pervious concrete to sequestrate CO2 from the environment and then to convert it into calcium carbonate inside the concrete. The units have dimensions of (200×400×40±5). All specimens were cured in a water tank after about 48 hours after casting. Then paint the sample from all surfaces (three layers) excluding the top surface. The pervious concrete and Pozzolime specimens, at age of 28 days, were put in the chamber, then the gas was supplied to the chamber with concentrations of 15%, 25%, and 50 %, for 24 hours. The efficiency was evaluated through carbonation depth, CO2-uptake, and weight change. The results showed that the maximum CO2 uptake was recorded at the age of 28 days for Pozzolime concrete when exposed to 50% of CO2 concentration


[1] H. Martin and A. B. SenseAir, ―Demand-controlled ventilation in vehicle parks,‖ Sense Air, vol. 3, pp. 1–8, 2001.
[2] Z. Q. Zhangand, Y. A. Mansoor, and F. H. Wei, ―Theoretical analysis of reinforcement tunnel lining corrosion,‖ Res. J. Appl. Sci. Eng. Technol., vol. 5, no. 21, pp. 5133–5141, 2013.
[3] V. V. P. Kumar and D. R. Prasad, ―Study on strength and durability characteristics of lime sludge based blended cement concrete,‖ J. Build. Pathol. Rehabil., vol. 4, no. 1, 2019.
[4] E. Possan, W. A. Thomaz, G. A. Aleandri, E. F. Felix, and A. C. P. dos Santos, ―CO2 uptake potential due to concrete carbonation: A case study,‖ Case Stud. Constr. Mater., vol. 6, pp. 147–161, 2017.
[5] N. Kadum, T. al-Attar, and Z. Al-Azzawi, ―Evaluation of pozzolime mixtures as a sustainable binder to replace portland cement in structural concrete,‖ MATEC Web Conf., vol. 120, p. 02009, 2017.
[6] A. J. Alsaad, T., and B. S. Alshathr, ―Utilization of Pervious Concrete in CO2 Capturing to Control Environmental Impact of Portland Cement,‖ Int. J. Eng. Technol., vol. 7, no. 4.20, p. 382, 2018.
[7] ASTM C 150-15, ―Standard Specification for Portland Cement,‖ Annu. B. ASTM Stand. Am. Soc. Test. Mater., vol. 04.02, no. C, 2015.
[8] Iraqi Specification Stander, ―Portland cement,‖ vol. No. 5, 1984.
[9] ASTM-C1240-15, ―Standard Specification for silica fume used in cementitious mixtures,‖ Annu. B. ASTM Stand. Am. Soc. Test. Mater. Vol. 04.02, 2015.
[10] Iraqi Specification, ―Lime That used in building,‖ vol. NO. 807, 2004.
[11] Iraqi Specification Standard, ―Natural aggregate resource that used in building and concrete,‖ vol. No 45, 1984.
[12] ASTM-C494-13, ―Standard specification for chemical admixtures for concrete,‖ Annu. B. ASTM Stand. Am. Soc. Test. Mater. Vol. 04.02, 2015.
[13] ASTM C 78-06, ―Standard test method for flexural strength of concrete,‖ Annu. B. ASTM Stand. Am. Soc. Test. Mater., vol. .04.02, no. C, 2006.
[14] BS EN 14630, ―Products and systems for the protection and repair of concrete structures — Test methods — Determination of carbonation depth in hardened concrete by the phenolphthalein method,‖ 2006.
[15] K. Fridh and B. Lagerblad, ―Carbonation of indoor concrete: Measurements of depths and degrees of carbonation,‖ Lund, 2013.
[16] H. El-Hassan and Y. Shao, ―Carbon storage through concrete block carbonation,‖ J. Clean Energy Technol., 2014.
[17] Iraqi Specification Standard, ―Terrazzo tiles,‖ vol. NO. 1042, p. 11, 1984.
[18] Paulo J. M. Monteiro and Povindar Kumar Mehta, Concrete: Microstructure, Properties, and Materials, Third Edit. McGraw-Hill, 2006.
[19] S. K. Kaliyavaradhan and T. C. Ling, ―Potential of CO2 sequestration through construction and demolition (C&D) waste - An overview,‖ J. CO2 Util., vol. 20, no. September, pp. 234–242, 2017.
[20] M. K. Choi, K. Y. Moon, J. S. Cho, K. H. Cho, J. W. Ahn, and S. C. Ur, ―Effect of silica fume and gypsum
on properties of Mg-based hydraulic lime,‖ J. Ceram. Process. Res., vol. 18, no. 9, pp. 659–665, 2017.
[21] W. Puatatsananon and V. E. Saouma, ―Nonlinear coupling of carbonation and chloride diffusion in concrete,‖ J. Mater. Civ. Eng., 2005.