Experimental study on enhancing the main characteristics of crumb rubber concrete

Youssf, O, Hassanli, R, Skinner, W, Mills, J, Ma, X, Zhuge, Y and Gravina, R 2018, 'Experimental study on enhancing the main characteristics of crumb rubber concrete', in Proceedings of the Australian Structural Engineering Conference (ASEC 2018), Adelaide, Australia, 25-28 September 2018, pp. 383-392.


Document type: Conference Paper
Collection: Conference Papers

Title Experimental study on enhancing the main characteristics of crumb rubber concrete
Author(s) Youssf, O
Hassanli, R
Skinner, W
Mills, J
Ma, X
Zhuge, Y
Gravina, R
Year 2018
Conference name ASEC 2018
Conference location Adelaide, Australia
Conference dates 25-28 September 2018
Proceedings title Proceedings of the Australian Structural Engineering Conference (ASEC 2018)
Publisher Engineers Australia
Place of publication Barton, Australia
Start page 383
End page 392
Total pages 10
Abstract The use of rubber particles as partial fine aggregate replacement to produce crumb rubber concrete (CRC) can have an adverse effect on some of its mechanical properties, such as strength. Researchers have used a range of methods to overcome the material deficiencies, however the results have often been contradictory and highly variable. In this paper, the effects of many different rubber chemical pre-treatments on CRC workability, compressive strength, tensile strength, and flexural strength were measured. The rubber pretreatments utilized chemicals such as Sodium Hydroxide (NaOH), Hydrogen Peroxide (H2O2), Sulfuric acid (H2SO4), Calcium Chloride (CaCl2), Potassium Permanganate (KMnO4), Sodium Bisulfite (NaHsO3), and Silane Coupling Agent. Soaking rubber particles in tap water or running them through water before mixing were also tried as pre-treatment of rubber particles. X-ray photoelectron spectroscopy (XPS) analysis and scanning electron microscope (SEM) imaging of some of the pre-treated rubber particles were carried out. The results showed that mixing rubber with dry cement before adding to the mix increased the compressive strength by up to 3%. Pretreatment using water was more effective than other chemicals in enhancing the CRC workability. Regardless of the treatment material type, the longer the time of the treatment the more cleaning of rubber occurred.
Subjects Structural Engineering
Keyword(s) Concrete--Materials
Concrete--Mixing
Rubber-Testing
Concrete construction--Standards
Elastic analysis (Engineering)
ISBN 9781925627114
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