No.8 Mesh Draindown Basket

No.8 Mesh Draindown Basket

The No.8 Mesh Draindown Basket is an essential tool for testing uncompacted bituminous mixes. It effectively measures the amount of asphalt binder that separates from a sample when held at the elevated temperatures typically encountered during production, transport, and placement. This test is particularly ideal for Stone Matrix Asphalt (SMA) or open-graded porous asphalt mixtures, where controlling binder draindown is critical to mix quality and performance.

How It Works:

A sample is placed in the basket, which is then set in a forced-air oven on a pre-weighed paper plate for one hour at the specified test temperature. The amount of draindown is measured as the portion of asphalt binder that separates from the sample and is deposited onto the plate outside the basket. This simple yet effective method allows engineers and technicians to assess the stability of their asphalt mix designs.

Construction and Dimensions:

The basket is constructed of high-quality ASTM E11 stainless steel mesh, ensuring durability and long-lasting performance even under demanding test conditions. Each basket measures 4.25x5.5in (108x140mm) in diameter and height, and features a 1in (25mm) bottom skirt to help contain the sample. A convenient bail-type handle makes it easy to place and remove the basket from the oven safely.

This model is constructed of No.8 (2.36mm) ASTM E11 stainless steel mesh, meeting the strict requirements of industry standards.

Features:

Accurately measures asphalt binder separation in uncompacted bituminous mixes Ideal for SMA or open-graded porous asphalt mixtures Durable, corrosion-resistant ASTM E11 stainless steel construction 1in (25mm) bottom skirt to contain the sample during testing Bail-type handle for safe and easy handling Meets industry standards for reliable, repeatable results

Included Items:

Draindown Basket

Meets Standard(s):

AASHTO T 305, ASTM D6390