Please wait a minute...

Frontiers of Structural and Civil Engineering

Front. Struct. Civ. Eng.    2018, Vol. 12 Issue (3) : 261-269     https://doi.org/10.1007/s11709-017-0394-x
RESEARCH ARTICLE |
Effect of natural pozzolan content on the properties of engineered cementitious composites as repair material
Said CHOUCHA, Amar BENYAHIA, Mohamed GHRICI(), Mohamed Said MANSOUR
Geomaterials Laboratory, Civil Engineering Department, University Hassiba Benbouali of Chlef, BP 151, Chlef 02000, Algeria
Download: PDF(1383 KB)   HTML
Export: BibTeX | EndNote | Reference Manager | ProCite | RefWorks
Abstract

In order to determine the effect of Natural Pozzolan (NP) content on the mechanical properties and durability characteristics on Engineered Cementitious Composites (ECC) as repair material. This study focused on the evaluation of the most factors influencing compatibility between the repair material and the base concrete including mechanicals properties such as, compressive and flexural strengths, elastic modulus, capillary absorption and drying shrinkage. The experimental results showed that natural pozzolan reduces the compressive strength and the flexural strength of ECC at all ages. The elastic modulus of ECC was remarkably lower than that of normal-strength concrete. This lower Young’s modulus is desirable for repair concrete, because it prevents the stresses induced by restrained shrinkage. In addition, the incorporation of high-volume natural pozzolan decreases significantly the coefficient of capillary absorption at long term and increases the drying shrinkage. Generally, based on the results obtained in the present experimental investigation, ECC can be used effectively as an overlay material over existing parent concrete.

Keywords natural pozzolan      engineered cementitious composites      mechanical strengths      elastic modulus      capillary absorption      drying shrinkage     
Corresponding Authors: Mohamed GHRICI   
Online First Date: 26 May 2017    Issue Date: 22 May 2018
 Cite this article:   
Said CHOUCHA,Amar BENYAHIA,Mohamed GHRICI, et al. Effect of natural pozzolan content on the properties of engineered cementitious composites as repair material[J]. Front. Struct. Civ. Eng., 2018, 12(3): 261-269.
 URL:  
http://journal.hep.com.cn/fsce/EN/10.1007/s11709-017-0394-x
http://journal.hep.com.cn/fsce/EN/Y2018/V12/I3/261
Service
E-mail this article
E-mail Alert
RSS
Articles by authors
Said CHOUCHA
Amar BENYAHIA
Mohamed GHRICI
Mohamed Said MANSOUR
Chemical composition/% Portland Cement Natural Pozzolan
CaO 64.0 10.5
SiO2 19.9 46.4
Al2O3 5.6 17.5
Fe2O3 2.5 10.5
MgO 1.8 3.8
SO3 3.1 0.4
K2O 0.7 1.5
Na2O 0.1 3.4
Physical properties
SSB (cm2/g) 3100 4100
Glass content / >15%
Tab.1  Chemical and physical properties of Portland Cements and Natural Pozzolan
Length
(mm)
Diameter
(µm)
Elastic Modulus
(GPa)
Elongation (%) Tensile strength (GPa) Density(g/cm3)
8 40 41 6.5 1.6 1.3
Tab.2  Properties of the PVA fibers
Mixture ID PC NP Sand w/cm NP/C HRWRA Fiber (%)
ECC_1.2 568 682 450 0.29 1.2 12 2
ECC_1.7 463 787 450 0.29 1.7 13 2
ECC_2.2 391 859 450 0.29 2.2 14.5 2
ECC_2.7 338 912 450 0.29 2.7 14.5 2
ECC_3.2 298 952 450 0.29 3.2 15 2
Tab.3  Mix proportion of ECCs with different replacement level (kg/m3)
Fig.1  Measurement of ultrasonic wave propagation velocity through the specimen
Fig.2  Schematic diagram of water absorption test
Fig.3  Frame to measure shrinkage deformation
Fig.4  Photo for slump flow diameter measured for ECC-2.7
Fig.5  Effect of natural pozzolan content on the compressive strength and flexural strength of ECCs
Fig.6  Effect of NP/PC ratio on the Elastic modulus of ECCs
Fig.7  Capillary absorption coefficient of different ECCs mixtures
Fig.8  Autogenous shrinkage development of ECC mixtures with various natural pozzolan contents
1 Matthews S. CONREPNET: Performance-based approach to the remediation of reinforced concrete structures: Achieving durable repaired concrete structures. Journal of Building Appraisal, 2007, 3(1): 6–20
https://doi.org/10.1057/palgrave.jba.2950063
2 Zhou J. Performance of engineered cementitious composites for concrete repairs. PhD Thesis, Delft University of Technology, Netherlands, 2011
3 Mallat A, Alliche A. Mechanical investigation of two fiber-reinforced repair mortars and the repaired system. Construction & Building Materials, 2011, 25(4): 1587–1595
https://doi.org/10.1016/j.conbuildmat.2010.10.017
4 Al-Zahrani M, Maslehuddin M, Al-Dulaijan S, Ibrahim M. Mechanical properties and durability characteristics of polymer-and cement-based repair materials. Cement and Concrete Composites, 2003, 25(4): 525–537
5 Emberson N K, Mays G C, Mays G C. Significance of property mismatch in the patch repair of structural concrete. Part 3: Reinforced concrete members in flexure. Magazine of Concrete Research, 1996, 48(174): 45–57
https://doi.org/10.1680/macr.1996.48.174.45
6 Li M. Multi-scale design for durable repair of concrete structures. PhD Thesis, University of Michigan, USA, 2009
7 Li V C, Horii H, Kabele P, Kanda T, Lim Y. Repair and retrofit with engineered cementitious composites. Engineering Fracture Mechanics, 2000, 65(2): 317–334
https://doi.org/10.1016/S0013-7944(99)00117-4
8 Pattnaik R. Investigation into compatibility between repair material and substrate concrete using experimental and finite element method. PhD Thesis, Clemson University, USA, 2006
9 Hassan K, Brooks J, Al-Alawi L. Compatibility of repair mortars with concrete in a hot-dry environment. Cement and Concrete Composites, 2001, 23(1): 93–101
https://doi.org/10.1016/S0958-9465(00)00073-1
10 Li V C. On engineered cementitious composites (ECC): a review of the material and its applications. Journal of Advanced Concrete Technology, 2003, 1(3): 215–230
https://doi.org/10.3151/jact.1.215
11 Zhu Y, Yang Y, Dang H, Yao Y. Mechanical properties of engineered cementitious composites with high volume fly ash. Journal of Wuhan University of Technology-Materials Science Edition, 2009, S1: 166–170
12 Yang E H, Yang Y, Li V C. Use of high volumes of fly ash to improve ECC mechanical properties and material greenness. ACI. Journal of Materials, 2007, 104(6): 620–628
13 Özbay E, Karahan O, Lachemi M, Hossain K, Duran Atiş C. Investigation of Properties of Engineered Cementitious Composites Incorporating High Volumes of Fly Ash and Metakaolin. ACI Materials Journal, 2012, 109(5): 565–571
14 Zhu Y, Yang Y, Yao Y. Use of slag to improve mechanical properties of engineered cementitious composites (ECCs) with high volumes of fly ash. Construction & Building Materials, 2012, 36: 1076–1081
https://doi.org/10.1016/j.conbuildmat.2012.04.031
15 Lim Y M, Li V C. Durable repair of aged infrastructures using trapping mechanism of engineered cementitious composites. Cement and Concrete Composites, 1997, 19(4): 373–385
https://doi.org/10.1016/S0958-9465(97)00026-7
16 Wang S, Li V C. High-early-strength engineered cementitious composites. ACI Materials Journal, 2006, 103(4): 97–105
17 Li V C. High performance fiber reinforced cementitious composites as durable material for concrete structure repair. International Journal for Restoration, 2004, 10(2): 163–180
18 Yıldırım G, Sahmaran M, Al-Emam M, Hameed R, Al-Najjar Y, Lachemi M. Effects of Compressive Strength, Autogenous Shrinkage, and Testing Methods on Bond Behavior of High-Early-Strength Engineered Cementitious Composites. ACI Materials Journal, 2015, 112(4): 409–418
19 Sahmaran M, Yucel H E, Al-Emam M, Yaman I O, Guler M. Bond Characteristics of Engineered Cementitious Composite Overlays. In: Transportation Research Board 92nd Annual Meeting, 2013, 13–1578
20 Ghrici M, Kenai S, Said-Mansour M. Mechanical properties and durability of mortar and concrete containing natural pozzolana and limestone blended cements. Cement and Concrete Composites, 2007, 29(7): 542–549
https://doi.org/10.1016/j.cemconcomp.2007.04.009
21 EN 12190-6. Products and systems for the protection and repair of concrete structures-Test methods- Determination of compressive strength of repair mortar, 1999
22 EN 1015-18. Methods of test for mortar for masonry, Part 18: Determination of water absorption coefficient due to capillary action of hardened mortar, 2003
23 Lepech M D, Li V C, Robertson R E, Keoleian G A. Design of green engineered cementitious composites for improved sustainability. ACI Materials Journal, 2008, 105(6): 567–575
24 Yang Y, Yao Y, Gao X, Deng H, Yu P, GAO X, Deng H, Yu P. Shrinkage reducing measures for engineering cementitious composites. Wuhan University Of Technology-Materials Science Edition, 2008, 23(6): 907–911
https://doi.org/10.1007/s11595-007-6907-z
25 Decter M. Durable concrete repair—Importance of compatibility and low shrinkage. Construction & Building Materials, 1997, 11(5): 267–273
https://doi.org/10.1016/S0950-0618(97)00047-0
26 Li M, Li V C. High-Early-Strength Engineered Cementitious Composites for Fast, Durable Concrete Repair-Material Properties. ACI Materials Journal, 2011, 108(1): 3–12
27 EN 1504-3. Products and systems for the protection and repair of concrete structures- Definitions, requirements, quality control and evaluation of conformity-Part 3: Structural and non-structural repair; 2006
28 Xinqi M, Zhao T, Zhang P. Optimization of shrinkage and crack resistance performance of Engineered Cementitious Composites (ECC). Electric Technology and Civil Engineering (ICETCE), International Conference on, IEEE, 2011, 6: 534–538
Related articles from Frontiers Journals
[1] Shuaicheng GUO, Qingli DAI, Jacob HILLER. Investigation on the freeze-thaw damage to the jointed plain concrete pavement under different climate conditions[J]. Front. Struct. Civ. Eng., 2018, 12(2): 227-238.
[2] Vallarasu Manoharan SOUNTHARARAJAN, Dr. Anandan SIVAKUMAR. Accelerated engineering properties of high and low volume fly ash concretes reinforced with glued steel fibers[J]. Front Struc Civil Eng, 2013, 7(4): 429-445.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed