Mechanical and durability properties of steel fibre-reinforced rubberised concrete

摘要

This study intends to assess the mechanical and durability behaviour of steel fibres (SF) concrete containing rubber waste. For this purpose, 16 concrete mixes were manufactured to produce test specimens. Rubber waste was used at five volume ratios of 0%, 5%, 10%, 15% and 20%. Moreover, SF were added at three mass ratios (0%, 1% and 2%). Subsequently, the slump, compressive and splitting tensile strength, fracture energy, ultrasonic pulse velocity, drying shrinkage length changes, bulk electrical resistivity, dynamic modulus of elasticity and resonance frequencies of all specimens were measured. One mix with no SF and rubber was used as control. The results showed that shrinkage deformation increased with the rubber waste content; however, and adding SF reduced shrinkage deformation, as expected. Moreover, using 2% SF with 5%, 10%, 15% and 20% rubber tire waste raised the flexural strength of the specimens by 23%, 16%, 7% and 1%, respectively, relative to the control mix. Moreover, rubber waste improved the fracture energy of specimens particularly when both rubber and SF are used. (C) 2020 Elsevier Ltd. All rights reserved.