Improving rubber concrete by waste organic sulfur compounds.
In this study, the use of crumb tyres as additives to concrete was investigated. For some time, researchers have been studying the physical properties of concrete to determine why the inclusion of rubber particles causes the concrete to degrade. Several methods have been developed to improve the bonding between rubber particles and cement hydration products (C-S-H) with the hope of creating a product with an improvement in mechanical strength. In this study, the crumb tyres were treated with waste organic sulfur compounds from a petroleum refining factory in order to modify their surface properties. Organic sulfur compounds with amphiphilic properties can enhance the hydrophilic properties of the rubber and increase the intermolecular interaction forces between rubber and C-S-H. In the present study, a colloid probe of C-S-H was prepared to measure these intermolecular interaction forces by utilizing an atomic force microscope. Experimental results showed that rubber particles treated with waste organic sulfur compounds became more hydrophilic. In addition, the intermolecular interaction forces increased with the adsorption of waste organic sulfur compounds on the surface of the rubber particles. The compressive, tensile and flexural strengths of concrete samples that included rubber particles treated with organic sulfur compound also increased significantly.
Chou
Liang-Hisng
LH
Department of Civil and Water Resource Engineering, National Chiayi University, Chiayi City, Taiwan.
Lin
Chun-Nan
CN
Lu
Chun-Ku
CK
Lee
Cheng-Haw
CH
Lee
Maw-Tien
MT
D019245:Compressive Strength; D003247:Conservation of Natural Resources / Q000379:methods*; D003252:Construction Materials / Q000032:analysis*; D007220:Industrial Waste; D018625:Microscopy, Atomic Force; D018583:Pliability; D012408:Rubber / Q000737:chemistry*; D013457:Sulfur Compounds / Q000737:chemistry*; D013718:Tensile Strength
D007220:Industrial Waste; D013457:Sulfur Compounds; D012408:Rubber