Investigation of concrete barriers with recycled rubber, steel slag and roof tile

The purpose of aggregating rubber is to increase concrete’s flexibility, elasticity, and
capacity to absorb energy. In some application of concrete, it is desired that concrete
should have low unit weight, high toughness and impact resistance. Although
concrete is the most commonly used construction material, it does not always fulfill
these requirements. In order to improve elastic properties of concrete and recycle the
waste materials, new applications have been realized recently. One of these
applications is the utilization of discarded tires in order to use together with
aggregate. For this purpose, this research will conduct investigating the physical and
mechanical properties of the concrete which is obtained from incorporating pieces of
discarded tires. It is thought that rubberized concrete would be an ideal material for
Jersey barriers which are subjected to immediate effects of impact. Rubberized
concrete could prevent life casualties and damaging the vehicles by absorbing the
impact energy. In the study, metakaolin from granulated waste roof tile, furnace slag
and synthetic textile fibers were studied to replace partially the cement which is
valuable material in concrete satisfying TS EN 1317 concrete specifications. In this
study 40 different mixtures where prepared. Flexural and compressive strength of
each mixture for period of 7, 14 and 28 days was determined. Flexural and
compressive strength values for each mixture were compared with control specimen
strength