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http://dx.doi.org/10.12989/cac.2014.13.6.709

Short term bond shear stress and cracking control of reinforced self-compacting concrete one way slabs under flexural loading  

Aslani, Farhad (Centre for Infrastructure Engineering and Safety, School of Civil and Environmental Engineering, University of New South Wales)
Nejadi, Shami (School of Civil and Environmental Engineering, University of Technology Sydney)
Samali, Bijan (Institute for Infrastructure Engineering, University of Western Sydney)
Publication Information
Computers and Concrete / v.13, no.6, 2014 , pp. 709-737 More about this Journal
Abstract
Fibre-reinforced self-compacting concrete (FRSCC) is a high-performance building material that combines positive aspects of fresh properties of self-compacting concrete (SCC) with improved characteristics of hardened concrete as a result of fibre addition. To produce SCC, either the constituent materials or the corresponding mix proportions may notably differ from the conventional concrete (CC). These modifications besides enhance the concrete fresh properties affect the hardened properties of the concrete. Therefore, it is vital to investigate whether all the assumed hypotheses about CC are also valid for SCC structures. In the present paper, the experimental results of short-term flexural load tests on eight reinforced SCC and FRSCC specimens slabs are presented. For this purpose, four SCC mixes - two plain SCC, two steel, two polypropylene, and two hybrid FRSCC slab specimens - are considered in the test program. The tests are conducted to study the development of SCC and FRSCC flexural cracking under increasing short-term loads from first cracking through to flexural failure. The achieved experimental results give the SCC and FRSCC slabs bond shear stresses for short-term crack width calculation. Therefore, the adopted bond shear stress for each mix slab is presented in this study. Crack width, crack patterns, deflections at mid-span, steel strains and concrete surface strains at the steel levels were recorded at each load increment in the post-cracking range.
Keywords
fibre-reinforced self-compacting concrete; self-compacting concrete; crack control; flexural cracking; bond shear stress;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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1 Gilbert, R.I. (2008), "Control of flexural cracking in reinforced concrete", ACI Struct. J, 105(3), 301-307.
2 Gilbert, R.I. and Nejadi, S. (2004), An Experimental Study of Flexural Cracking in Reinforced Concrete Members under Sustained Loads, UNICIV Report No. R-435, School of Civil and Environmental Engineering, University of New South Wales, Sydney, Australia.
3 Kooiman, A.G. (2000), "Modelling steel fibre reinforced concrete for structural design", Dissertation, Technische Universiteit Delft.
4 Leutbecher, T. and Fehling, E. (2008), "Crack Formation and Tensile Behaviour of UHPC Reinforced with a Combination of Rebars and Fibres", In: Schmidt, M., Fehling, E., Sturwald, S. (Eds.) Ultra High Performance Concrete (UHPC), Second International Symposium on Ultra High Performance Concrete. Struct. Mater. Eng. Series, 10, 497-504.
5 Maia, L., Azenha, M., Geiker, M. and Figueiras, J. (2012), "E-modulus evolution and its relation to solids formation of pastes from commercial cements", Cem. Concr. Res., 42, 928-936.   DOI
6 Marti, P., Alvarez, M., Kaufmann, W. and Sigrist, V. (1998), "Tension chord model for structural concrete," Struct. Eng. Int., 4, 287-298.
7 Nejadi, S. (2005), "Time-dependent cracking and crack control in reinforced concrete structures", Ph.D. Thesis, The University of New South Wales.
8 RILEM TC 162-TDF (2002), "Test and design methods for steel fibre reinforced concrete", Final recommendations, Mater. Struct., 35, 579-582.
9 RTA (Regional Transportation Authority) (2006), "Materials test methods", 1.
10 Aslani, F. and Nejadi, S. (2013a), "Self-compacting concrete incorporating steel and polypropylene fibers: compressive and tensile strengths, moduli of elasticity and rupture, compressive stress-strain curve, and energy dissipated under compression", Compos Part B-Eng, 53, 121-133.   DOI   ScienceOn
11 Aslani, F. and Nejadi, S. (2012a), "Mechanical properties of conventional and self-compacting concrete: An analytical study", Constr. Build. Mater., 36, 330-347.   DOI   ScienceOn
12 Aslani, F. and Nejadi, S. (2012b), "Bond characteristics of steel fibre reinforced self-compacting concrete", Can. J. Civil Eng., 39(7), 834-848.   DOI   ScienceOn
13 Aslani, F. and Natoori, M. (2013), "Stress-strain relationships for steel fibre reinforced self-compacting concrete", Struct. Eng. Mech., 46(2), 295-322.   DOI   ScienceOn
14 Aslani, F. and Nejadi, S. (2012c), "Bond behavior of reinforcement in conventional and self-compacting concrete," Adv Struct Eng, 15(12), 2033-2051.   DOI
15 Aslani, F. and Nejadi, S. (2013b), "Creep and shrinkage of self-compacting concrete with and without fibers", J. Adv. Concr. Technol., 11(10), 251-265.   DOI
16 Aslani, F. (2013), "Effects of specimen size and shape on compressive and tensile strengths of selfcompacting concrete with or without fibers", Mag Concrete Res, 65(15), 914-929.   DOI
17 ASTM standards (2000), Volume 04.02, "Concrete and aggregates".
18 ASTM C183-08 (2000), "Standard practice for sampling and the amount of testing of hydraulic cement," ASTM standards 2000 (Annual book).
19 ASTM C31 -11b (2000), "Standard test methods for sampling and testing fly ash or natural pozzolans for use in portland-cement concrete," ASTM standards 2000 (Annual book), 2000.
20 ASTM C989-06 (2000), "Standard specification for ground granulated blast-furnace slag for use in concrete and mortars," ASTM standards 2000 (Annual book).
21 ASTM C1077-13 (2000), "Standard Practice for Agencies Testing Concrete and Concrete Aggregates for Use in Construction and Criteria for Testing Agency Evaluation", ASTM standards 2000.
22 Deutscher Beton-Verein EV, DBV-Merkblatt. Bemessungsgrundlagen fur Stahlfaserbeton im Tunnelbau, Eigenverlag; 1996.
23 ACI 237R-07 (2007), "Self-consolidating concrete", ACI Committee 237.
24 European guidelines (2005), "The european guidelines for self-compacting concrete, Specification, production and use".
25 ACI 232.2R-03 (2004), "Use of Fly Ash in Concrete", ACI Committee 232.
26 ACI 233R-95 (2000), "Ground granulated blast-furnace slag as a cementitious constituent in concrete," ACI Committee 233.
27 ACI 544.2R (1999), State-of-the-Art Report on Fiber Reinforced Concrete, Technical report, American Concrete Institute.
28 AS 1012.10 (2000), "Determination of indirect tensile strength of concrete cylinders".
29 AS 1012.11 (2000), "Determination of modulus of rupture".
30 AS 1012.14 (1991), "Method for securing and testing from hardened concrete for compressive strength".
31 AS 1012.17 (1997), "Determination of the static chord modulus of elasticity and Poisson's ratio of concrete specimens".
32 AS 1141 (2011), "Methods for sampling and testing aggregates - particle size distribution - sieving method", Standards Australia.
33 AS 1478.1 (2000), "Chemical admixtures for concrete, mortar and grout - Admixtures for concrete", Standards Australia.
34 AS 2350 (2006), "Methods of testing portland and blended cements", Standards Australia.
35 AS 3582.2 (2001), "Supplementary cementitious materials for use with portland and blended cement - Slag - Ground granulated iron blast-furnace", Standards Australia.
36 Wu, H.Q. and Gilbert, R.I. (2009), "Modelling short-term tension stiffening in reinforced concrete prisms using a continuum-based finite element model", Eng. Struct., 31(10), 2380-2391.   DOI
37 AS 3583 (1998), "Methods of test for supplementary cementitious materials for use with portland cement", Standards Australia.
38 AS 3972 (2010), "General purpose and blended cements", Standards Australia.