Multiple Stress Creep and Recovery of Nanosilica Modified Asphalt Binder

Jan Olek Analysis of the Multiple Stress Creep Recovery Asphalt Binder Test and Specifi cations for Use in Indiana

Rheological Properties and Chemical Bonding of Asphalt Modified with Nanosilica

The objective of this study is to evaluate the rheological properties and chemical bonding of nano-modified asphalt binders blended with nanosilica. In this study, the nanosilica was added to the control asphalt at contents of 4% and 6% based on the weight of asphalt binders. Superpave binder and mixture tests were utilized in this study to estimate the characteristics of the nano-modifed aspha...

Investigating the Creep Properties of PET-Modified Asphalt Concrete

This study has investigated the creep properties of asphaltic concrete modified with different dosages of waste polyethylene terephthalate (PET) in two different ranges of size. Uniaxial dynamic creep test at 40°C was conducted on the cylindrical specimens of the mixtures. The load was applied in two different frequencies of 0.5 and 5Hz. Creep test results showed that the accumulated strain und...

Developing a Laboratory Protocol for Asphalt Binder Recovery

An Alternative Asphalt Binder, Sulfur-Extended Asphalt (SEA)

Background In the early 1970s, due to concern over asphalt cement supply issues and an anticipated over abundance of elemental sulfur, many organizations Société Nationale des Pétroles d’Aquitaine (SNPA), Gulf Oil of Canada, Sulfur Development Institute of Canada (SUDIC), Texas Chemical Company, U.S. Bureau of Mines, and the Texas Transportation Institute) began to evaluate the potential for su...