A 90-degree peeling experiment device and evaluation method for detecting adhesion performance of asphalt and aggregate interface

By using a 90° peel test device and evaluation method, combined with asphalt peel strength and volume retention rate, the problem of difficulty in quantitatively evaluating the adhesion performance of the asphalt-aggregate interface in traditional methods has been solved, achieving a more accurate assessment of adhesion performance, which is suitable for quality inspection and engineering applications of asphalt mixtures.

CN122193078APending Publication Date: 2026-06-12KUNMING UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
KUNMING UNIV OF SCI & TECH
Filing Date
2026-04-08
Publication Date
2026-06-12

AI Technical Summary

Technical Problem

Existing technologies cannot accurately identify the adhesion failure mode of the asphalt-aggregate interface, and traditional test methods rely on manual visual inspection, resulting in low reliability and accuracy of the results, and cannot objectively and quantitatively evaluate the adhesion performance between asphalt and aggregate.

Method used

A 90° peel test apparatus and evaluation method were adopted. The peel strength and volume retention of asphalt were measured and quantitatively evaluated by combining the roughness of the stone slab. The apparatus included movable parts, vertical connecting plates, steel plate clamping devices and fully automatic protractors. A three-dimensional laser scanner was used to obtain the surface information of aggregate particles and an improved boiling water test was conducted.

Benefits of technology

It enables objective and quantitative evaluation of the adhesion performance between asphalt and aggregates. It has a simple structure and is easy to operate. It is suitable for quality inspection and engineering characteristic evaluation of various types of asphalt, and improves the accuracy and classification differentiation of the evaluation.

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Abstract

This invention discloses a 90° peel test apparatus and evaluation method for detecting the adhesion performance of asphalt-aggregate interface, belonging to the field of building materials testing technology. It includes a movable component, a load sensor, an upper clamp, and a steel plate clamping device. These four components are fixed at a right angle by a vertical connecting plate. The vertical connecting plate also has a fully automatic protractor to ensure a constant angle during the experiment. The steel plate clamping device has a sample slot containing a transmission belt, transmission rope, transmission shaft, and sliding clamp. Fastening bolts push the sliding clamp on the transmission belt, tightly clamping the sample within the sample slot. Finally, the peel force is read by the load sensor, and the asphalt layer peel strength is calculated using a formula. By introducing volume retention rate, the asphalt peel strength is correlated with the asphalt-aggregate adhesion performance, resulting in a new evaluation method for the adhesion performance of the asphalt-aggregate interface.
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