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http://dx.doi.org/10.12989/cac.2019.23.6.409

Size effect study on compressive strength of SCLC  

Karamloo, Mohammad (Department of Civil Engineering, Shahid Rajaee Teacher Training University)
Roudak, Mohammad Amin (School of Civil Engineering, Iran University of Science and Technology)
Hosseinpour, Hamed (Department of Civil Engineering, Shahid Rajaee Teacher Training University)
Publication Information
Computers and Concrete / v.23, no.6, 2019 , pp. 409-419 More about this Journal
Abstract
In the present study, effect of size and placement of cubic specimens on compressive strength of self-compacting lightweight concrete (SCLC) were considered. To do so, 81 specimens of different sizes (50 mm, 75 mm, 100 mm, and 150 mm) were prepared by using three different mixes of SCLC. Results of the cured specimens were then used in regression analyses to find predictive equations with regard to both the placement direction and the size. Test results showed that the strength ratio in cases in which the direction of loading and placement were parallel, were higher than those specimens, whose configurations were normal between loading and placement. In addition, strength ratios in SCLC mixes were slightly higher than those are for self-compacting normal weight concrete. In order to analyze the effect of size on compressive strength the conventional size effect law as well as the modified size effect law (MSEL) were used. Besides, the convergence criterion of nonlinear regression process of size effect study has been discussed. Analyses of the results showed that the unconstraint nonlinear regression in size effect study of SCLC mixes could lead to erroneous results.
Keywords
self-compacting lightweight concrete; compressive strength; size effect; loading direction;
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Times Cited By KSCI : 8  (Citation Analysis)
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