Title:
The Bond Strength of Repairing Systems Applied to Concrete Elements: Analysis of Historical Data
Author(s):
A. Bonati, I. Capasso, O. Coppola, E. Grasso, and L. Schiavi
Publication:
Symposium Paper
Volume:
326
Issue:
Appears on pages(s):
111.1-111.10
Keywords:
bond strength, concrete, polymer, protection system, external insulation
DOI:
10.14359/51711094
Date:
8/10/2018
Abstract:
The use of protection and repairing systems aimed at increasing the durability of concrete structures is a widespread technique. In particular, the use of external thermal insulation composite systems resulted to be a very promising repairing technique enhancing also the insulating behavior of the repaired construction works.
This paper examines the performances of several protection systems when applied to concrete standard support elements. The effectiveness of this protection systems is evaluated by means of tests carried out according to ETAG 004 (Guideline for European Technical Approval of External Thermal Insulation Composite Systems “ETICS” with rendering.), before and after ageing (water immersion).
The behavior of protection products is determined through the use of standard concrete slab produced according to EN 1776 (Products and systems for the protection and repair of concrete structure – Test methods – Reference concretes for testing). The research activity describes the comparison of different types of protecting materials and systems, produced and tested in a decade (2007-2017), in order to verify different behaviors according to product families and according to the evolution of product mechanical properties.
Related References:
1. Hassan, K. E., Brooks, J. J., Al-Alawi, L., "Compatibility of repair mortars with concrete in a hot-dry environment", Cement and Concrete Composites, V. 23, No. 1, 2001, pp. 93-101.
2. Al-Zahrani, M. M., Maslehuddin, M., Al-Dulaijan, S. U., Ibrahim, M., “Mechanical properties and durability characteristics of polymer and cement-based repair materials”, Cement and Concrete Composites, V. 25, No. 4, 2003, pp. 527-537.
3. Dehwah, H.A.F., “Durability of reinforced concrete beams repaired with various repair materials”. M.S. Thesis. Dhahran, Saudi Arabia: King Fahd University of Petroleum and Minerals, 1990.
4. Shaw, J.D.N., “Materials for concrete repair”, 1st International Conference on Deterioration and Repair of Reinforced Concrete in the Arabian Gulf, V. 1, Bahrain, 1985, pp. 127–38.
5. Allen, R.T.L., Edwards, S.C., Shaw, J.D.N., “The Repair of Concrete Structures”, Blackie Academic and Professional, London, 1994.
6. Mirza, J., Mirza, M. S., Lapointe, R., "Laboratory and field performance of polymer-modified cement-based repair mortars in cold climates", Construction and Building Materials, V. 16, No. 6, 2002, pp. 365-374.
7. Colangelo, F., De Luca, G., Ferone, C., Mauro, A., “Experimental and Numerical Analysis of Thermal and Hygrometric Characteristics of Building Structures Employing Recycled Plastic Aggregates and Geopolymer Concrete”, Energies, V.6, No. 11, 2013, pp. 6077-6101.
8. Barluenga, G., Hernandez-Olivares, F., “SBR latex modified mortar rheology and mechanical behaviour”, Cement and Concrete Research, V. 34, No. 3, 2004, pp. 527–535.
9. Ribeiro, M. C. S., Ferreira, A. J. M., Marques, A.T., “Effect of natural and artificial weathering on the long-term flexural performance of polymer mortars”, Mechanics of Composite Materials, V. 45, No. 5, 2009, pp. 515–526.
10. Medeiros, M. H. F., Helene, P., Selmo, S., “Influence of EVA and acrylate polymers on some mechanical properties of cementitious repair mortars,” Construction and Building Materials, V. 23, No. 7, 2009, pp. 2527–2533.
11. ETAG 004, “Guideline for European Technical Approval of External Thermal Insulation Composite Systems (ETICS) with rendering”, 2013.
12. EN 1504, “Products and systems for the protection and repair of concrete structures”.
13. EN 1542, “Products and systems for the protection and repair of concrete structure – Test methods Measurement of bond strength by pull-off”.
14. Chen, B., Liu J., “Mechanical properties of polymer-modified concretes containing expanded polystyrene beads”, Construction and Building materials, V.21, 2007, pp. 7-11.
15. Wang, R., Zhang, L., “Mechanism and durability of repair systems in polymer-modified cement mortars”, Hindawi Publishing Corporation, 2015.
16. Knapen, E., Van Gemert, D., “Effect of under water storage on bridge formation by water-soluble polymers in cement mortars”, Construction and Building Materials, V. 23, 2009, pp. 3420-3425.
17. Mills, R., “Strength- maturity relationship for concrete which is allowed to dry”. RILEM international symposium on concrete and reinforced concrete in hot-concrete, 1960.
18. Yurtdas, I., Peng, H., Burlion, N., Skoczylas, F., “Influences of water by cement ratio on mechanical properties of mortars submitted to drying”, Cement and Concrete Research, V. 36, No. 7, 2006, pp. 1286-1293.
19. Afridi, M.U.K., Ohama Y., Zafar Iqbal M., Demura K., “Water retention and adhesion of powdered aqueous polymer-modified mortars”, Cement and Concrete Composite, V.17, 1995, pp. 113-118.