Laboratory tests are integral to conducting research into the fundamental properties of asphalts and modified asphalts. When there is no test to lead us to what we want to know, we develop one. Often, this includes developing new instruments, such as the Automated Flocculation Titrimeter, which is used to determine the stability and blending compatibility of asphalts.
WRI routinely develops new test methods and improves existing test methods for predicting long-term behavior of asphalts in roadways. By correlating the characteristics identified by tests with the performance of the materials, we are able to improve predictive capacity. For us, these methods represent specific, quantifiable research products that contribute to the tool kits of state highway officials, researchers and others seeking to build better roads.
WRI test methods that are available to the asphalt community include those state highway departments or research laboratories can run without adding new equipment or by making minimal additions. WRI test methods figure prominently in the SuperPave® Asphalt Specification and are used to predict moisture sensitivity and aging; cracking and crack healing (fatigue damage) and thin film behavior and adhesion.
Laboratory methods and instruments developed or adapted by WRI
How the research (methods) meet the road