Amine-Impregnated Zeolite Bitumen Composite for Durable Asphalt Adhesion

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Solution Overview

Problem

Amine-based liquid antistripping agents used in asphalt lose efficacy over time, particularly at high temperatures, leading to reduced adhesion between bitumen and aggregates, thus affecting the durability of asphalt.

Innovation Solution

Amine-impregnated zeolite is used as a solid antistripping agent, where amine molecules are gradually released from the zeolite's pores into the bitumen matrix, enhancing durability by maintaining effectiveness over a longer period.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If amine-based liquid antistripping agents are used in asphalt, then adhesion between bitumen and aggregates is improved, but the agents lose efficacy over time particularly at high temperatures

Engineering Contradiction:

Improveadhesion between bitumen and aggregatesVSAvoidduration of antistripping agent efficacy

Core Design Contradiction:

ReliabilityVSDuration of action of moving object

Solution Approach 1:

The patent utilizes zeolite, a porous material, as a carrier to impregnate amine-based antistripping agents. The porous structure of zeolite allows the amine molecules to be stored within its pores and gradually released into the bitumen matrix, extending the duration of action while maintaining reliable adhesion between bitumen and aggregates even at high temperatures

Inventive Principle:

Principle #31Porous materials

Solution Approach 2:

The invention creates a composite material system consisting of zeolite carrier combined with amine-based antistripping agents. This composite structure (zeolite-amine complex) allows the amine to be delivered sustainably over time, resolving the contradiction between providing strong initial adhesion and maintaining prolonged efficacy under thermal conditions

Inventive Principle:

Principle #40Composite materials

2Duration of action of moving object

If amine molecules are gradually released from zeolite pores into bitumen, then duration of antistripping agent efficacy is extended, but device complexity increases

Engineering Contradiction:

Improveduration of antistripping agent efficacyVSAvoidcomplexity of antistripping agent delivery system

Core Design Contradiction:

Duration of action of moving objectVSDevice complexity

Solution Approach 1:

The zeolite-amine composite system operates on a self-service principle where the porous zeolite structure automatically releases amine molecules into the bitumen matrix through diffusion and desorption mechanisms. This self-regulating release system extends the duration of efficacy without requiring external control mechanisms, pumps, or complex delivery infrastructure, thereby minimizing added complexity

Inventive Principle:

Principle #25Self-service

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The amine-impregnated zeolite provides increased durability to asphalt by ensuring consistent antistripping performance despite exposure to high temperatures and moisture, reducing moisture-induced damage.

Implementation Method 1

the amine molecules loaded into the zeolite's pores

Methodology Applied

Scientific EffectAdsorption: Adsorption

Implementation Method 2

the amine molecules loaded into the zeolite's pores can be gradually released into the matrix of bitumen

Methodology Applied

Scientific EffectDiffusion: Diffusion

Data Source

PatentUS20260078241A1Bitumen composites with impregnated zeolites

Publication Date: 2026.03.19 FINI ELHAM

AI summary

A bitumen composite includes an amine-impregnated zeolite and bitumen. Forming the bitumen composite includes combining bitumen and an amine-impregnated zeolite to yield a mixture, heating the mixture to yield the bitumen composite.