Microscopic analysis of the interaction between crumb rubber and bitumen in asphalt mixtures using the dry process

作者：Javier Lopez Moro Francisco; Candelas Moro Maria; Hernandez Olivares Francisco; Witoszek Schultz Bernabe; Alonso Fernandez Manuel

来源：Construction and Building Materials, 2013, 48: 691-699.

DOI：10.1016/j.conbuildmat.2013.07.041

• Crumb rubber
• Carbon black
• Dry process
• Fluorescent microscopy
• SEM
• Rheological characterisation

A microscopy study of the modification of bitumen with crumb rubber was carried out to investigate its application in asphalt mixtures using the dry process. The modification involved the transfer of maltenes to the rubber and carbon black to the bitumen, causing the absorption of the lighter-oil fractions of bitumen. The modification increased the stiffness of the bitumen, resulting in an improvement in the binder%26apos;s resistance to rutting. The changes in shape and porosity developed around the crumb rubber particles by the rubber-bitumen interaction allow the most favourable particle size (%26lt; 200 mu m) to be established for the dry-process in crumb rubber-modified asphalt mixtures.

• 出版日期2013-11