Avanzado control de calidad en compactación...•Asphalt compaction and challenges •Automatic...

Avanzado control de calidad en compactación

de asfaltoWinfried Schramm

Director de Aplicación

• Asphalt compaction and challenges

• Automatic optimisation of compaction (IC)

• Continuous Compaction Control (CCC)- Compaction Management System- Roller network at site

• Future Developments- Digitisation - Job-site processing

ADVANCED DIRECT QUALITY CONTROL FOR ASPHALT COMPACTION

Challenges: Wide range of asphalt mix designs

Dense-graded

Open-graded Gap-graded

S M A: Gap graded with

- % of crushed stones,

- mastic filler, sand and PmB.

- difficult to compact

Safety: Reduced vehicle spray and hydro-plane

Durable: For high traffic and heavy truck routes

Gap graded mix

Compaction methods

Static compaction (Tandems, PTR)

Dynamic compaction (fixed parameters)

Vibration, Oscillation

Intelligent compaction (IC) (automatic adjusting)

for asphalt and soil

• Unexperienced operators

• Too many passes

• Over compaction:

- pulverization of aggregates

- surface loosening effects

- fatting-up with bitumen

cracks

cracks

Daily risks:

base course binder thinner layers

I C: Automatic optimisation

Direct information:

- Temperature

- Compaction progress

- Work programs

EVIB (MN/m²)0,5 mm

130 °C

prof ASPHALT MANAGER

IC: What are the benefits for operators?

0,5 mm

130°C

Valuable information:

• Compaction progress

• Mix temperature-T°C

Work programs:

• Typical compaction tasks

base course, binder

wearing courses

Advantage: Quick reduction of amplitude

Avoids over compaction

SMA 0/8 S, thickness 3cm / 10 t – Tandem roller with AM

Auto Compaction Ctrl.:

Surface quality:

after 4 passes with AM2135 mm drum width

0,8 mm directed amplitude

250 kN force

BW 203 AD-AM (13 t); SMA / thickness 7 cm

Nürburgring racing course (Germany)

Compaction of SMA

Tight limits for

- Evenness (≤ 3 mm)

- Surface grip

Night time paving: Zurich Airport / 2008…..

Rehabilitation of main runway

up to 500 t/hr

4x finshers

10 x rollers with AM

25 cm base course

10 cm binder, 4 cm SMA

Job-site-today: C-C-C

Tablet-PC + Office Software

Compaction maps with Pass count Temperature Compaction value

Same overlap

Same No. of passes

(everywhere)

Clear routine for compaction

That was then: 2007

Experienced operators + testing field

Zeltweg Airport runway / Austria

Asphalt 400 t/hr

3 mixing plants

6 finishers / 10 rollers

Colour Codes: Roller passes

red = ≤ 2 passes

green = compaction in progress

blue = target passes achieved

Continuous Compaction Control (C-C-C)

Office Software incl. Statistics

- Plug & play

- Print-outs (PDF-documents)

Documentation:

Highway A6 / Nürnberg (D); PPP-Project

Quality control system: 4 rollers with WLAN

Porous asphalt:

Documentation of

- Roller passes

- T°C in a distance to

finishers

Compaction network:

Highway A3 / Regensburg (D);

Complete reconstruction: 4 rollers with WLAN

Summary

Intelligent Compaction (IC) has matured

The technology works,

- saves costs - improves quality

Quality control + Documentation -evident on big scale projects

- particular on PPP-projects

Summary: IC improves Quality and Efficiency; Good quality means consistent results…

Our target: Longest service life with minimum repairs

Road construction business becomes more transparent and cost efficient with

• Network of all construction machineries, Cloud-based

• BIM = Building Information Modelling

= Integrated operation method incl. planning, execution and management of a job-site

• Optimisation of cpl. construction process + detailed documentation:

= More precise estimation of asphalt density during paving or compacting e.g. via layer thickness…

The Future is now!

Stay tuned!

Thank-you

Winfried SchrammApplication Manager

Dept.: MPMTel.: +49 6742 100339

Fax: +49 6742 100520339Mobil: 01713030954

winfried.schramm@bomag.comhttp://www.bomag.com