Journal article Open Access

Performance of Concrete Grout under Aggressive Chloride Environment in Sabah

S. Imbin; S. Dullah; H. Asrah; P. S. Kumar; M. E. Rahman; M. A. Mannan

Service life of existing reinforced concrete (RC) structures in coastal towns of Sabah has been affected very much. Concrete crack, spalling of concrete cover and reinforcement rusting of RC buildings are seen even within 5 years of construction in Sabah. Hence, in this study a new mix design of concrete grout was developed using locally available materials and investigated under two curing conditions and workability, compressive strength, Accelerated Mortar Bar Test (AMBT), water absorption, volume of permeable voids (VPV), Sorptivity and 90-days salt ponding test were conducted. The compressive strength of concrete grout at the age 90 days was found to be 44.49 N/mm2 under water curing. It was observed that the percentage of mortar bar length change was below 1% for developed concrete grout. The water absorption of the concrete grout was in between the range of 0.88 % to 3.60 % under two different curing up to the age 90 days. It was also observed that the VPV of concrete was in the range of 0 % to 9.75 and 2.44% to 13.05% under water curing and site curing respectively. It was found that the Sorptivity of the concrete grout under water curing at the age of 28 days is 0.211mm/√min and at the age 90 day are 0.067 mm/√min. The chloride content decreased greatly, 90% after a depth of 15 mm. It was noticed that the site cured samples showed higher chloride contents near surface compared to water cured samples. This investigation suggested that the developed mix design of concrete grout using locally available construction materials can be used for crack repairing of existing RC structures in Sabah.

Files (140.0 kB)
Name Size
14729.pdf
md5:8f4514ace1d04dff6f7205482020ab2f
140.0 kB Download
  • Al-Gahtani, A.S, 2010, Effect of curing methods on the properties of plain and blended cement concretes, Construction and Building Materials, Vol.24,(3) , pp :308-314.
  • ASTM C 1260-05, 2005, Standard test method for potential alkali reactivity of aggregates (mortar-bar method). Annual Book of Standards, ASTM, West Conshohocken. [10] Bungey J.H and Millard S.S , 1996,Testing of Concrete in Structures, Blackie Academic &professional, U.K., pp. 286. [11] BS1881: Part 122:1983. Testing concrete. Methods for determination of water absorption [12] Safiuddin, M. and Hearn, N. 2005. Comparison of ASTM saturation techniques for measuring the permeable porosity of concrete, Cement and Concrete Research 35 (5): 1008-1013. [13] Dinakar, P, Babu K.G., Santhanam M, 2008, Durability Properties of High Volume Fly Ash Self Compacting Concrete, Cement and Concrete Composites, Vol. 30, pp: 880-886. [14] Gambir, M.L., 2004, Concrete Technology, Civil Engineering Series, Third Edition, Tata McGrow-Hill [15] Neville, A.M. 2002. Properties of Concrete, Fourth and Final Edition Standards updated to 2002, Prentice Hall. [16] McPolin D., Basheer P., Long A., Grattan K. and Sun T. 2005, Obtaining progressive chloride profiles in cementitious materials" Construction & Building Materials, Vol.19, pp. 666-673.
  • ASTM C 1543 - 02, 2002, Standard Test Method for Determining the Penetration of Chloride Ion into Concrete by Ponding.
  • ASTM C 1585 - 04, 2004, Standard Test Method for Measurement of Rate of Absorption of Water by Hydraulic Cement Concretes.
  • ASTM C 642 -97, 1997, Standard Test Method for Density, Absorption, and Voids in Hardened Concrete.
  • Horrigmoe, G., 2000, Future Needs in Concrete Repair Technology, Proceedings, Concrete Technology for a Sustainable Development in the 21st Century , E & FN Spon, London.
  • Kamyab Z. H, 2010, Structural Behaviour of Deteriorated Concrete Structures Thesis for the Degree of Doctor of Philosophy, Chalmers University of Technology, Gothenburg, Sweden.
  • Shan Somayaji, 2001, "Civil Engineering Materials", Second Edition, Prentice Hall, Inc
  • Xianming S , Ning X, Keith F, Jing G, 2012, Durability of steel reinforced concrete in chloride environments: An overview, Construction and Building Materials, Vol. 30 , pp:125-138.
0
0
views
downloads
All versions This version
Views 00
Downloads 00
Data volume 0 Bytes0 Bytes
Unique views 00
Unique downloads 00

Share

Cite as