In this test, a bitumen sample is stretched to a certain length, cut in two halves, and then allowed to recover. The amount it returns to its original length is measured and expressed as a percentage.

For most polymer-modified bitumen, elastic recovery values usually range between 50% and 80%, depending on the type of polymer and specifications used.

A high elastic recovery value indicates that the bitumen is more elastic, flexible, and resistant to permanent deformation. This usually results in longer-lasting and more durable roads.

This test is important because it shows how the binder will behave under traffic loads. A higher elastic recovery means the material can handle stress better, reducing damage like rutting and cracking.

The Elastic Recovery Test is a laboratory test used to measure how well polymer-modified bitumen (PMB) returns to its original shape after being stretched under a controlled environment. It helps determine the elasticity and performance of the binder.