Research Articles | Challenge Journal of Concrete Research Letters

Influence of nano-modification on mechanical and durability properties of cement polymer anticorrosive coating

Shoib Bashir Wani, Junaid Ahmed, M. S. Haji Sheik Mohammed, Tahir Hussain Muntazari, Nusrat Rafique

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In the present study performance evaluation of nano-modified cement polymer anticorrosive coating (CPAC) was undertaken by conducting the Chemical Resistance Test (CRT), Applied Voltage Test (AVT), Bond Strength Test (BST), Accelerated Corrosion Test (ACT) and Coating Flexibility Test (CFT). The site oriented coating comprises of nitrite, styrene-butadiene polymer and other additives. The anticorrosive polymer solution is compatible with concrete or cement when uniformly mixed with fresh ordinary portland cement (OPC). Totally forty-five specimens were subjected to various performance evaluation tests. In CRT observations were made on drilled and undrilled specimens after 45 days test period in liquid and vapour phase. The coating did not blister, soften and lose bond in all the tested medium during CRT and meet the requirement of BIS 13620-1993 and ASTM A775/A775M.The coating has the ability to withstand the electrochemical stresses during one-hour AVT. In the BST, single and double coated rebars showed +126.96% and +46.08% greater usable bond strength respectively than uncoated rebar. In the ACT, there is a significant escalation in time of cracking of specimens of double-coated reinforced rebars by 2 times as compared to uncoated rebars. Cracking time for single coated reinforced rebars was found 1.6 times more than uncoated rebars. In the CFT, coating completely in the inner and the outer radius of the 180° bend rebar fails to meet the requirements of BIS and ASTM standards. Thus the coating has to be applied subsequent to cutting and rebar twisting is finished.


concrete; corrosion; cement polymer anticorrosive coating; durability; coated rebars; durability; uncoated rebars

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Alekseev SN, Ivanov FM, Modry S, Shiessel P (1990). Durability of reinforced concrete in aggressive media. Oxford & IBH Publishing Co. Pvt. Ltd., New Delhi, 1993. (Translation of Dolgovechnosti Zhelezobetonav Agressivnikh Sredakh, Stroiizdat, Moscow, 1990)

ASTM A775/A775M (1995). Standard Specification for Epoxy-Coated Reinforcing Steel Bars. Annual book of ASTM Standards, Vol.01.04.

BIS 383 (1970). Specification for coarse and fine aggregates from natural sources for concrete (Second Revision). Bureau of Indian Standards, New Delhi, India.

BIS 432-Part 1 (1982). Specifications for Mild Steel and Medium Tensile Steel Bars and Hard-Drawn Steel Wire for Concrete Reinforcement. Bureau of Indian Standards, Manak Bhawan 9, New Delhi, India.

BIS 516 (1959).Method of Tests for Strength of Concrete. Bureau of Indian Standards, Manak Bhawan 9, New Delhi, India.

BIS 1786 (2008). Specification for high strength deformed steel bars and wires for concrete reinforcement. Bureau of Indian Standards, New Delhi, India.

BIS 2386 (1963). Methods of test for aggregates for concrete–Part 3: Specific gravity, density, voids, absorption and bulking.

BIS 2770 (1997). Method of testing bond in reinforced concrete part-I. Bureau of Indian Standards, New Delhi, India.

BIS 4031-Part 2 and 5 (1988). Part-2: Methods of physical tests for hydraulic cement, Part-5: Determination of initial and final setting times. Bureau of Indian Standards, New Delhi, India.

BIS 10262 (2009). Recommended guidelines for concrete mix design. Bureau of Indian Standards, New Delhi, India.

BIS 12269 (1987). Specification for 53 grade ordinary portland cement. Bureau of Indian Standards, New Delhi, India.

BIS 13620 (1993). Fusion Bonded Epoxy-Coated Reinforcing Bars – Specification. Bureau of Indian Standards, New Delhi, India.

Cti Technical Note 1 (2013). Corrosion of Steel Reinforcement in Concrete. Cti Consultants Pty Ltd, Abn 56 003 824 815.

Gull S, Wani SB, Amin I (2020). The influence of rib configuration on bond strength development between steel and concrete. Journal of the Civil Engineering Forum, 6(1), 193-200.

Gunaselvi S, Pazhani KC (2015). Corrosion control of steel rebars using electroless nickel coating. Transactions of the Indian Institute of Metals, 69(4), 859–868.

IS 516 (1959). Method of Tests for Strength of Concrete. Bureau of Indian Standards, Manak Bhawan 9, New Delhi, India.

Mohammed MSHS, Raghavan RS, Knight GMS, Murugesan V (2014). Macrocell corrosion studies of coated rebars. Arabian Journal for Science and Engineering 39, 3535–3543.

Neville AM (1987). Why we have concrete durability problems. Katherine and Bryant Mather International Conference on Concrete Durability, ACI SP-100, American Concrete Institute, Detroit, 21-48.

Shanmugapriya S, Rajendran S, Joany RM, Sharmila A, Devadharshini K, Sangeetha P, Prabhakar P (2015). Recent trends in studies on corrosion resistance of steel in simulated concrete pore solutions. International Journal of Nano Corrosion Science and Engineering, 2(4), 10-20.

Turu’allo G (2006). Corrosion rates measurements by linear polarisation and AC impedance techniques using different steel bars and acidic solution. SMARTek, 4(3).

Vishnu JR, Sharma UK (2012). Influence of pre-load on corrosion vulnerability of reinforced concrete. Advances in Structural Engineering, 15(7), 1115–1124.


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