عنوان المقالة:Evaluation of the rheological behavior of fresh self-compacting rubberized concrete by using the Herschel–Bulkley and modified Bingham models.
E. Güneyisi a, M. Gesoglu a, N. Naji b, S. İpek a,* a Department of Civil Engineering, Gaziantep University, 27310 Gaziantep, Turkey b Department of Civil Engineering, Anbar University, Anbar, Iraq
الملخص العربي
The study herein presents the use of the Herschel–Bulkley and modified Bingham models to
monitor the rheological behavior related to workability of the fresh self-compacting concrete
containing waste rubber. Therefore, the self-compacting rubberized concretes were produced
at a constant water-to-binder ratio of 0.35 and binder content of 520 kg/m3. Class F
fly
ash was incorporated as 30% of total binder content by weight. Two types of waste scrap tire
rubber, crumb rubber and tire chips, were utilized instead of natural
fine and coarse
aggregate at various level, respectively. The tire chips and three different graded crumb
rubbers (No.18, No.5, and mixed crumb rubber) and
five designated rubber contents of 5%,
10%, 15%, 20%, and 25% were considered as experimental parameters. The rheological
behavior related to workability of the fresh concretes was investigated by using the ICAR
rheometer. The torque–speed relationship obtained from rheometer was used to character-
ize the rheological behavior of fresh self-compacting rubberized concrete by applying the
Herschel–Bulkley and modified Bingham models to experimental data. The results revealed
that the self-compacting concretes produced in this study exhibited shear thickening
behavior and increasing the rubber content resulted in higher exponent 'n' values for the
Herschel–Bulkley and c/m coefficients for the modified Bingham models
تاريخ النشر
04/09/2015
الناشر
Science Direct journal homepage: http://www.elsevier.com/locate/acme
د.نهلة ناجي هلال | Dr NAHLA NAJI HILAL | 12834