EXPERIMENTAL INVESTIGATION ON THE FRESH AND HARDENED PROPERTIES OF CONCRETE INCORPORATING POLYVINYL

  • Abo Dhaheer , M.S. Civil Engineering Department, College of Engineering, University of Al-Qadisiyah Al-Diwaniyah, Iraq
Keywords: polyvinyl alcohol, compressive strength, tensile strength, slump test, total water absorption

Abstract

Polyvinyl alcohol (PVA) has undergone intensive research work that has led to confidence in its utilization in various applications. Nevertheless, its utilization as a construction material in the concrete industry still needs to be fully addressed. In this paper, an experimental study was dedicated to investigate the influence of PVA on the fresh and hardened properties of concrete. Three different strength grades, represented by water to cement ratios (w/c), of 0.4, 0.5 and 0.6, with four different PVA dosages of 1, 2, 3 and 4%, by mass of cement, were employed in the preparation of the concrete mixes. Concerning the fresh properties, results showed that there was a significant contribution of PVA to the workability in all produced mixes, irrespective of w/c ratio. In addition, the initial and final setting time of cement pastes modified with 2% PVA were longer than that of the control paste. In term of the hardened properties, results demonstrated that the compressive (fcu) and splitting tensile (fst) strengths of concrete are dominated by amounts of PVA in the mix and w/c ratios. With the high and moderate w/c ratios, they increased when up to 2% PVA was used, and thereafter decreased. However, with the low w/c, PVA did not provide any improvement in the strength, but instead, it decreased the strength when more than 2% was added. The findings revealed also that increasing PVA content resulted in a significant reduction in total water absorption (TWA) of concrete specimens. The larger the PVA contents the lower is the TWA of the specimens.

References

1. Patzák, B. and Bittnar, Z. Modeling of fresh concrete flow. Computers and Structures, 87, 2009, pp. 962–969.
2. Karihaloo, B.L. Fracture Mechanics and Structural Concrete. UK: Addison Wesley Longman, 1995.
3. Dinakar, P., Reddy, M.K. and Sharma, M. Behaviour of self-compacting concrete using Portland pozzolana cement with different levels of fly ash. Materials and Design, 46, 2013. pp. 609–616.
4. Domone, P.L. and Illston, J. Construction materials: Their nature and behaviour. New York, USA: Spon Press, 2010.
5. Dinakar, P., Sethy, K.P. and Sahoo, U.C. Design of self-compacting concrete with ground granulated blast furnace slag. Materials and Design, 43, 2013. pp. 161–169.
6. Siddique, R., Khan, M. I. Supplementary Cementing Materials: Silica Fume. Engineering Materials, Ch:2. Springer-Verlag Berlin Heidelberg, 2011, pp. 67-119.
7. Eren, F., Gödek, E., Keskinates, M., Felekog˘lu, KM, Felekog˘lu, B. Effects of latex modification on fresh state consistency, short term strength and long term transport properties of cement mortars, Constr. Build. Mater. 133, 2016, 226–233.
8. Soni, E.K. and Joshi, Y.P. Performance Analysis of Styrene Butadiene Rubber-Latex on Cement Concrete Mixes, Int. J. Eng. Res. Appl. 4 (3), 2014, 838–844.
9. Wang, R., Lackner, R., P.M. Wang, Effect of styrene–butadiene rubber latex on mechanical properties of cementitious materials highlighted by means of nanoindentation, Strain 47 (2), 2011, 117–126.
10. Aggarwal, L.K., Thapliyal, P.C., Karade, S.R. Properties of polymer-modified mortars using epoxy and acrylic emulsions, Constr. Build. Mater. 21 (2), 2007, 379–383.
11. Allahverdi, A., Kianpur, K., Moghbeli, M.R. Effect of polyvinyl alcohol on flexural strength and some important physical properties of Portland cement paste, Iran. J. Mater. Sci. Eng. 7 (1), 2010, 1–6.
12. Kim J, Robertson RE, Naaman AE. Structure and properties of poly (vinyl alcohol)-modified mortar and concrete. Cem Concr Res ,1999, ;29 (3): 407–15.
13. Thong, C, Teo, D Ng, C. Application of polyvinyl alcohol (PVA) in cement-based composite materials: A review of its engineering properties and microstructure behavior. Constr. Build. Mater. 107, 2016, 172–180.
14. Ohama Y. Polymer-based admixtures. Cem Concr Res 1998;20(2–3):189–212.
15. Singh NB, Rai S. Effect of polyvinyl alcohol on the hydration of cement with rice husk ash. Cem Concr Res 2001 ; 31(2): 239–43.
16. Kim J, Robertson RE. Effects of polyvinyl alcohol on aggregate–paste bond strength and the interfacial transition zone. Adv Cem Based Mater 1998 ; 8 (2): 66–76.
17. Santos RS, Rodrigues FA, Segre N, Joekes I. Macro-defect free cements influence of polyvinyl alcohol, cement type, and silica fume. Cem Concr Res 1999; 29 (5): 747–51.
18. Mannan, M.A., Alexander, J., Ganapathy, C., Teo, D.C.L. Quality improvement of oil palm shell (OPS) as coarse aggregate in lightweight concrete, Build. Environ. 41 (9), 2006, 1239–1242.
19. Kou, S.C. Poon, C.S. Properties of concrete prepared with PVA-impregnated recycled concrete aggregates, Cem. Concr. Compos. 32 (8), 2010, 649–654.
20. Knapen, E., Van Gemert, D. Water-soluble polymers for modification of cement mortars, Int. Symp. Polym. Concr., Guimarães, Portugal, 2006, 85–93.
21. Iraqi Organization of Standards, IOS 5: 1984, for Portland Cement.
22. Iraqi Organization of Standards, IOS 45: 1984, for Aggregate.
23. Neville, A.M. Properties of concrete. 4th ed. UK: Longman Scientific Group Ltd. 1995.
24. ASTM C191-92, American Standard Test Method, 1993.
25. American Society for Testing and Materials, C143-89a, Standard Test Method for Slump of Hydraulic Cement Concrete, Annual Book of ASTM Standards, (04) (02),1989, pp.85-86.
26. British Standard Institution, Method for Determination of Compressive Strength of Concrete Cubes, B.S. 1881: Part 116: 1983, 3 pp.
27. American Society for Testing and Materials, C496-86, Standard Test Method for Splitting Tensile Strength of Cylindrical Concrete Specimens, Annual Book of ASTM Standards, Vol.04.02, 1989, pp.259-262.
Published
2018-05-19
Section
Articles