Fast
Shipping
Quick,
Simple Ordering
Clear,
Upfront Pricing
Over 30,000
Happy Customers
Exceptional
Customer Service
Industry's Largest
Catalog
Lottman Breaking Head, 4in
The Lottman Breaking Head is a specialized loading fixture designed for determining the Indirect Tensile (IDT) strength of asphalt mix specimens, a process also known as the Lottman test. This crucial test helps evaluate the moisture susceptibility and potential for stripping of asphalt concrete, which is vital for predicting pavement performance and durability.
Used in conjunction with standard Marshall load frames, this fixture provides a stable and precise method for applying a compressive load across the diameter of a cylindrical asphalt specimen. This load induces a tensile failure, allowing engineers and technicians to measure the tensile strength of the mix.
Key Features:
- Robust Construction: The fixture consists of a sturdy base with two upright guide rods and a matching top piece with guide sleeves. This design ensures accurate alignment and smooth vertical movement during testing.
- Precision Loading Strips: The upper and lower loading strips are crafted from stainless steel and feature a concave contact surface. This specific curvature ensures the load is distributed evenly along the length of the specimen, conforming to testing standards.
- Specimen Compatibility: This model is designed specifically for 4in (102mm) diameter asphalt specimens. A separate model is available for 6in (152mm) specimens.
Meets Test Methods:
- AASHTO T283: Standard Method of Test for Resistance of Compacted Asphalt Mixtures to Moisture-Induced Damage.
- ASTM D4867: Standard Test Method for Effect of Moisture on Asphalt Concrete Paving Mixtures.