Abstract
The purpose of this work is to study fresh lightweight concrete containing recycled tire rubber aggregates. An experiment on concrete obtained by incorporating rubber aggregate with a ratio replacement of 5, 7.5 and 10% is done to evaluate the effect of these aggregates on the workability of two sets of concrete specimens. In the first set, coarse aggregates were replaced by different percentages by weight of granulate rubber and in the second set both coarse aggregates and sand were replaced rubber granulate and crumb rubber. Density, air content, compaction and slump tests are performed on the seven mixtures. Taking into account the density and water absorption differences between the natural aggregates and the rubber aggregates, the validity of the tests results are discussed. The results show that incorporating these rubber aggregates affects most rheological properties of lightweight concrete, for some application of concrete incorporating waste tire, rubber particles should be treated.
Highlights
Consequence of the rapid growth of consumer products such as tires has greatly induced environmental problems
4 Results and discussions 4.1 Measurement of Slump (Abrams Cone) The consistencies was measured with slump test are of the order of 5 cm (Fig. 5), which corresponds to lightweight concretes farms requiring energy in its installation
Several researchers have shown that the shape and texture of rubber aggregates significantly affects the workability of concretes [13, 31, 32]
Summary
Consequence of the rapid growth of consumer products such as tires has greatly induced environmental problems. The concrete incorporating tire rubber waste is expected to have higher fracture and cracking resistance. Slump tests were performed on rubberized concrete by Raghvan et al [9], Khatib and Bayomy [10], Aiello and Leuzzi [2]. Air content tests were performed by Fedroff et al [11] et Khatib and Bayomy [10]. The behavior of fresh concrete from mixing up to compaction depends mainly on the property called “workability of concrete”. Workability represents the amount of work which is to be done to compact the concrete in a given mould. Workability depends on the properties of the concrete, and on the nature of the application.
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