INFLUENCE OF GREEN CORROSION INHIBITOR ON REINFORCED CONCRETE ATTACKED BY MAGNESIUM SULPHATE
DOI:
https://doi.org/10.11113/mjce.v28.15999Keywords:
Ad hoc networks, Disaster mitigation, Network coding, Reducing broadcast redundancy, Sensor nodes, Sulphate attack, concrete resistivity, green inhibitor, corrosionAbstract
Sulphate attack is one of the phenomena that may cause gradual but severe damages to concrete structures durability. Sulphate attack is due to a series of chemical reactions between sulphate ions and principle components of the cement paste microstructure. In this work the effects of 1.5% and 4.5% MgSO4 additions on concrete durability of 0.45 and 0.65 water/cement ratios (w/c) and the residual effects on corrosion of steel reinforcement were investigated using concrete resistivity. The results shows that 2% addition of Bambusa arundinacea green inhibitor improved the concrete resistivity of MgSO4 contamination concrete by 54% and 64% for 0.45 and 0.65w/c ratios respectively. Thus comparatively, Bambusa arundinacea inhibitor performed far better than Calcium nitrite, Ethanolamine inhibitors and even the non-contaminated control sample. This confirmed a linear relationship between concrete resistivity and probability of corrosion in concrete. Concrete resistivity has proven to be effective parameter for the estimation of the risk of steel reinforcement in concrete.References
Abdulrahman, A.S. (2012). Performance of bambusa arundinacea as green inhibitor for
corrosion of steel reinforcement in concrete. PhD Thesis, Faculty of Civil Engineering,
Universiti Teknologi Malaysia.
Abdulrahman A. S., Ismail M., and Hussain M. S. (2011). Inhibiting Sulphate Attack in Concrete
by Hydrophobic Green Plant Extract. Advanced Materials Research Vols. 250-253,
-3843.
Asipita, S. A., Ismail, M., Abd Majid, M. Z., Abdul Majid, Z., (2014). Green Bambusa
Arundinacea leaves extract as a sustainable corrosion inhibitor in steel reinforcement
concrete. Journal of Cleaner production. Volume 67, page 139-146.
Bassuoni, M.T. and Nehdi, M. L. (2009). Durability of self-consolidating concrete to sulfate
attack under combined cyclic environments and flexural loading. Cement and Concrete
Research 39(3): 206-226.
Bellmann, F., Möser, B. and Stark, J. (2006). Influence of sulfate solution concentration on the
formation of gypsum in sulfate resistance test specimen. Cement and Concrete Research
(2): 358-363.
Boyd, A.J. and Mindess, S. (2004). The use of tension testing to investigate the effect of W/C
ratio and cement type on the resistance of concrete to sulfate attack. Cement and
Concrete Research 34(3): 373-377.
British Standard. (1983). BS 1881-125. Methods of mixing and sampling fresh concrete in the
laboratory. United Kingdom, BSI.
Brown, P., Steven, W.B. and Doerr, A. (2000). Chemical changes in concrete due to the
ingress of aggressive species. Cement and Concrete Research 30(3): 411-418.
Brown, P. and Steven, W.B. (2000). The distributions of bound sulfates and chlorides in concrete
subjected to mixed NaCl, MgSO4, Na2SO4 attack. Cement and Concrete Research
(10): 1535-1542.
Chao Sun, Jiankang Chen, Jue Zhu, Minghua Zhang, Jian Ye (2013). A new diffusion model of
sulfate ions in concrete. Construction and Building Materials 39 (2013) 39–45.
Girardi, F.M. and Di, R. (2011). Resistance of concrete mixtures to cyclic sulfuric acid exposure
and mixed sulfates: Effect of the type of aggregate. Cement and Concrete Composites
(2): 276-285.
Hekal, E. E., Kishar, E. and Mostafa, H. (2002). Magnesium sulfate attack on hardened blended
cement pastes under different circumstances. Cement and Concrete Research 32(9):
-1427.
Irassar, E.F. (2009). Sulfate attack on cementitious materials containing limestone filler -- A
review. Cement and Concrete Research 39(3): 241-254.
Ismail, M., Muhammad, B. and Ismail M.E. (2010). Compressive strength loss and reinforcement
degradations of reinforced concrete structure due to long-term exposure. Construction
and Building Materials 24(6): 898-902.
Malaysian Standard. (2010). MS EN 12620. Aggregates for Concrete. Cyberjaya, Department of
Malaysian Standard.
Morris, W., Vico, A., Vázquez, M. and de-Sanchez, S.R. (2002). Corrosion of reinforcing steel
by means of concrete resistivity measurements. Corrosion Science, 44: 81-99.
Polder, R.B. (2009). Critical chloride content for reinforced concrete and its relationship to
concrete resistivity. Mater Corros. 60(8):623–30.
Pradhan, B. and Bhattacharjee B. (2009). Performance evaluation of rebar in chloride
contaminated concrete by corrosion rate. Construction and Building Materials 23(6):
-2356.
Saraswathy V., Muralidharan, S., Kalyanasundaram, R.M., Thangavel, K. and Srinivasan, S
(2001). Evaluation of a composite corrosion-inhibiting admixture and its performance
in concrete under macrocell corrosion conditions. Cement and Concrete Research 31:
-794.
Sideris, K.K., Savva, A.E. and Papayianni, J. (2006). Sulfate resistance and carbonation of plain
and blended cements. Cement and Concrete Composites 28(1): 47-56.
