Overview of the latest developments of new pavements ...noise reduction in road traffic Overview of the latest developments of new pavements according the target to have the best results

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noise reduction in road traffic

Overview of the latest developments of new pavements accordingthe target to have the best results in noise reduction and water

drainage

Medellin, ColombiaDr. Hutschenreuther, Germany

www.hutschenreuther.de

Noise reduction in road traffic

Noise – an current topic

What causes traffic noise

Measuring of traffic noise

Solutions against traffic noise - today

Solutions against traffic noise – in future

50 % of the world populationare suffering from noise

Possible consequences:concentration problemsStress, sleepCardiovascular diseasesincreased risk of heart attack

(Quelle: jwsl.de)

NOISE

Main mechanisms in the development oftire / road noise:

* tire oscillations

* air resonances

Truck ~60 km/h cars ~40 km/h

Dominant source of sound in the road is the tire / road noise.

tire oscillations air resonances

•Quelle: Müller BBM

•FolieNr.13

SPB Measurements - Statistical Pass By


•FolieNr.13

Tires with different profiles

microphones

CPX Mesurements - (Close Proximity Method)


•FolieNr.13

Solutions against traffic noise - today

Active noise protection:for example: sound insulating walls,enclosures

but:Tires and road surfaces must contribute toProvide noise reduction.

In Germany:

RLS 90: Guidelines for Noise Control on roads

(Ausgabe 1990 - is being revised):

Correction for different road surfaces DStrO

DStrO – Correction for different road surfaces DStrO (RLS 90 )

Road surface DStrOin dB(A)

Standard GussasphaltMastic Asphalt (Reference) 0

Asphaltconcrete ≤ 11mm andSplittmastixasphalt 8mm and11mm without gritting

-2Gussasphalt, MasticAsphalt noise

reducedPorous Asphalt PA 11mm(void content ≥ 22 Vol-%) -4

Porous Asphalt PA 8mm(void content ≥ 22 Vol-%) -5

low noise road surfaces have a referred noise reduction of at least 2 dB (A)

Asphalt surfaces – good for noise reduction

Porous construction with small maximum aggregate size:- Reduction Airpumping

"Plateaus with canyons":- Reduce tire vibrations- Minimization Airpumping

Section of surface

Asphalt Technologies –in Germany for noise reduction

PA Porous Asphalt – open graded asphalt

MA Mastic Asphalt noise reduction with special gritting

SMA Stone Mastix Asphalt LA – (LA – noise reduction)

LOA AC (LOA – noise reduction)

PMA Porous Mastic Asphalt

PA Porous Asphalt

Binder PmB & special modification & CCBit113AD®

Aggregates Very high quality, qubic, PSV min. 51, SZ18/LA20

Roads Heavy duty traffic, motorways, trunk roads

Special Water drainage, noise reduction, Using fibres

Void content ≥ 25%

After laying 10years under traffic

PA Porous Asphalt

paving

PA Porous Asphalt

Drilling core with seal

seal


Aggregates Very high quality, mostly broken, mostly qubic, PSV min. 51, SZ18/LA20


Special Very dense asphalt, high longlivity (>20 years),special equipment for transportation and laying neededIn Germany is demanded as layer for bridgedecksWAM Warm Asphalt Mixtures – law in GermanySpecial gritting

Void content ≥ 0%

MA Mastic Asphalt, noise reduction

production inAsphalt mixing

plant

Transportationand

Homogenisation

paving withspecial MA

paver

Mastic Asphalt Technology

Noise reduced Mastic asphalt 8mm,warm asphalt technology, temperature and viscosity reduced

SMA Stone Mastix Asphalt LA




Special Using fibres

Void content >15%

• SMA with high void content

• No gritting

• Only use on dense layers

• Special binder demanded

DR. HUTSCHENREUTHER GmbH

Quelle. Stoeckert bast

SMA Stone Mastix Asphalt LA

Binder PmB & special modification

Aggregates Very high quality, mostly broken, mostly qubic, PSV min. 51, SZ18/LA20

Roads trunk roads, city roads, rural roads

Special noise reduction, very sensible to pave

Void content ≥ 5%

LOA 5D – Asphalt noise reduction

LOA 5 D

LärmoptimierteAsphaltdeckschicht(Municipal applications)

Composition

about 1/3 fine,2/3 of coarseaggregates

First use 2007 inDüsseldorf

1/3

2/3

LOA 5D – Asphalt noise reduction

Binder special modification CCBit113AD®



Special Water drainage, noise reduction, dense base part of layer,system of 2 layers in 1 pavementVery stable, very long livity

Void content Upper layer > 17%Base layer ≤2 %

PMA - POROUS MASTIC ASPHALT

PMA Paving BAB A 24 Sept. 2009

Youtube: look for „pfa asphalt“ and „pma asphalt“

PMA - POROUS MASTIC ASPHALT


Production Technology (no need special equipment):

• Production of the PMA mix in an Asphalt Mixing Plant by usingCCBit113AD ® modified bitumen

• Loading the mix in the Asphalt Mixing Plant into a normal truck

• Paving with a normal asphalt paver

• No gritting, but rolling (not compacting) for evenness of thesurface

• Paving temperature below 180°C (365°F)down to 165°C (330°F)

• Self compacting asphalt !


optimization of noise reduction, water drainage technical and structuralengineering for longevity PMA (Porous Mastic Asphalt)

•17Vol.-%

•2Vol.-%

•(Quelle: BAM)


Asphalt mixtures – noise reduction

particle size distributionMin. void contentMin. binder content

Asphalt Size (max mm) Void content % Binder content %

AC 8DSasphalt concrete

8 6,2 7,0

LOA 5 DSpecial asphalt c.

5 5,0 6,0

SMA 8 S 8 2,5 7,2

SMA 8 LAnoise reduction

8 15,0 6,5

PMA 5noise reductionWater drainage

5 Upper L 17base ≤ 2

7,0

PA 8noise reductionWater drainage

8 ≤ 24 6,5

MA 8Noise reduction

8 0 7,0

Asphalt

PA Porous Asphalt

MA noise reduction (special gritting)

Porous Mastic Asphalt (PMA)

Splittmastixasphalt LA noise reduced

LOA5D

Asphalt

PA Porous Asphalt

MA noise reduction (special gritting)

Porous Mastic Asphalt (PMA)

Splittmastixasphalt LA noise reduced

LOA5D

Dense and even surfaces:-2 bis -4 Dezibel

Solutions - compacting and self compacting asphalt

Semi open graded

surfaces:

> 5 Dezibel

Open graded surfaces:-5 bis -9 Dezibel

By the use of new technologies

- warm asphalt mixtures- low viscosity bitumen / asphalt- CCBit113AD® with additional perfect adhesion and- high stability @ hot and cold climatic condions

we have the possibility to develop different asphalt for allneeded puposes, so as

- noise reductionwater drainage- longivity- stable under heavy duty traffic

muchas gracias!

www.facebook.com/Dr.Hutschenreuther


www.hutschenreuther.de

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Overview of the latest developments of new pavements ...noise reduction in road traffic Overview of the latest developments of new pavements according the target to have the best results