Elastomer-Modified Pervious Concrete Pavement for Heavy Traffic

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Solution Overview

Problem

Concrete pavements are perceived as less comfortable and more expensive than asphalt pavements, with durability and maintenance costs being a concern, and existing pervious concrete solutions are not suitable for heavy traffic due to limited mechanical strength and additional costs associated with surface treatment layers.

Innovation Solution

A concrete pavement structure comprising a low-cost concrete base layer directly coated with an elastomer-modified pervious concrete layer, eliminating the need for a bonding layer, which enhances mechanical strength, durability, and skid resistance while maintaining efficient water drainage and noise reduction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If a surface treatment layer is applied to improve wear and skid resistance of pervious concrete, then mechanical strength and safety are improved, but noise-absorbing properties and drainage are adversely affected, and additional costs and working steps are required

Engineering Contradiction:

Improvewear resistanceVSAvoidnoise absorption

Core Design Contradiction:

StrengthVSObject-generated harmful factors

Solution Approach 1:

The invention changes the chemical composition parameters of the pervious concrete by incorporating polymer emulsion at specific dosages (5-20% of cement weight) and using specific water-cement ratios (0.25-0.40), which transforms the material properties to achieve both wear resistance and noise absorption simultaneously without requiring a surface treatment layer

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention creates a composite material system by combining cement, polymer emulsion, water, and aggregates into an elastomer-modified pervious concrete that integrates multiple functions (structural strength, wear resistance, noise absorption, and drainage) into a single homogeneous layer, eliminating the need for separate surface treatment

Inventive Principle:

Principle #40Composite materials

2Reliability

If polymer is added to pervious concrete to improve freeze-thaw resistance and crack resistance, then durability and stability are improved, but mechanical strength is reduced due to high void content

Engineering Contradiction:

Improvefreeze-thaw resistanceVSAvoidmechanical strength

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The invention optimizes the water-cement ratio parameter to a specific range (0.25-0.40) and controls polymer emulsion dosage (5-20% of cement weight), which changes the material density and structural integrity parameters to achieve both improved freeze-thaw resistance through polymer flexibility and adequate mechanical strength through optimized mix proportions

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention applies polymer emulsion specifically to coat and bond the aggregate particles within the pervious concrete matrix, creating localized flexible bonding zones that improve freeze-thaw resistance and crack resistance at critical interfaces while maintaining the overall void structure for drainage

Inventive Principle:

Principle #3Local quality

3Ease of manufacture

If conventional pervious concrete is used for heavy traffic, then cost is reduced by eliminating bonding layer, but mechanical strength is insufficient

Engineering Contradiction:

Improveconstruction costVSAvoidmechanical strength

Core Design Contradiction:

Ease of manufactureVSStrength

Solution Approach 1:

The invention changes the compositional parameters by incorporating polymer emulsion (5-20% of cement weight) and optimizing the water-cement ratio (0.25-0.40), which transforms the material to achieve adequate mechanical strength for heavy traffic while maintaining the cost-effective single-layer construction approach without bonding layers

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention creates an elastomer-modified composite concrete material that combines the structural properties of cement concrete with the flexibility and adhesion properties of polymer emulsion, achieving the necessary mechanical strength for heavy traffic applications while eliminating the need for additional bonding layers and reducing overall construction cost

Inventive Principle:

Principle #40Composite materials

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 solution provides a durable, cost-effective, and aesthetically customizable concrete pavement suitable for heavy traffic with improved ride quality, reduced maintenance, and comparable noise reduction to asphalt pavements, while minimizing additional costs and environmental impact.

Implementation Method 1

an elastomer modified pervious concrete layer having a thickness below to 4 cm, a hardened void content ranging from 5% to 20%, preferentially from 5% to 10%, in volume

Methodology Applied

Scientific EffectPorosity: Porosity

Data Source

PatentUS10815624B2Concrete pavement structure comprising a concrete base layer and an elastomer improved concrete wearing layer

Publication Date: 2020.10.27 AMRIZE TECHNOLOGY SWITZERLAND LLC

AI summary

A concrete pavement structure includes a base layer directly coated by a wearing layer, wherein the base layer is a concrete base layer and the wearing layer is an elastomer modified pervious concrete layer, having a thickness below to 4 cm, a void content ranging from 5% to 20% in volume, and a maximal diameter of aggregates present in the polymer modified pervious concrete layer is 10 mm.