Analysis of drying shrinkage on fibre reinforced concrete by the model B3

Author(s): M. Sahiganic-Isovic, T. Arangjelovski
Paper category: Conference
Book title: 8th RILEM International Symposium on Fiber Reinforced Concrete: challenges and opportunities (BEFIB 2012)
Editor(s): Joaquim A.O. Barros
Print ISBN: 978-2-35158-132-2
e-ISBN: 978-2-35158-133-9
Publisher: RILEM Publications SARL
Pages: 809 - 821
Total Pages: 12
Language: English

Analysis by B3 Model (Bazant, Baweja) was used to evaluate the model for prediction of drying shrinkage for steel fiber concrete on the basis of experimental data. The analysis was done by linear regression of experimental data updating the original model by calculating the scaling parameter p6. Experimental investigation were done measuring free shrinkage strain, in the period of 400 days, on small thicknesses concrete prisms 12/12/36cm and on reinforced concrete beams of cross section 15/28cm, length 300cm. In the experiment four types of concrete were used: ordinary strength concrete class C30/37 (OSC), high-strength concrete class C60/75 (HSC), steel fibre concrete class C30/37 (FROSC) and steel fibre high-strength concrete class C60/75. For the steel fibre concretes low volume fraction of steel fibres were used of 0.45%. According to the experimental results drying shrinkage on concrete prisms was reduced for 5.2% and 6.2% for steel fibre ordinary and high-strength concrete respectively in comparison to the references concrete. Also the maximum drying shrinkage of reinforced concrete beams was reduced at a smaller rate about 3.8% and 2.1% for steel fibre concrete following the same comparison as it mentioned before. The analysis of drying shrinkage by the Model B3 shows that experimental results are in the statistical range of predicted shrinkage values for coefficients of variation of errors ω(ψ2)=34%.

Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00

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