Thermal Segregation and Leveling

by mklingenhagenBlog, Road Construction, Success StoryPosted on Comments are Disabled

Thermal Segregation and Leveling - Live Trial in Thailand

SDC International, ROADTEC, CCC Intertrade and MOBA AG participated on a road construction event in Surat Thani in the south of Thailand. A total of 140 visitors joint the event which was split into a theoretical introduction of construction solutions in the AM and a practical live pavement demonstration in the PM.
We presented the ROADTEC Shuttle Buggy “SB2500D” and the ROADTEC paver “RP195EX” equipped with MOBA’s PAVE IR system and MOBA’s state of the art leveling system Big Sonic Ski as well as a matching ski on the other side.
The setup was presented to a group of contractors, road authorities and other government bodies concerned with road construction.

Next to Pave IR and MOBA Big Sonic Ski, the paver was equipped with our MOBA material sensor which controls the outflow of material from the screed. Next to leveling equipment MOBA is the leading manufacturer of such material sensors.

How does the Shuttle buggy support the laying of the asphalt with the correct temperature?

The shuttle buggy solves the majority of the problems that arise connected to thermal segregation. The shuttle buggy acts like a mobile mixing plant that ensures that the material is transported through insolated chambers but also keeps moving which ensures homogenous temperature of the material. It also reduces the number of paver stops which subsequently lead to a smooth crossing from truck load to truck load keeping the temperature on a homogenous level. An animated video is showing this process:

PAVE IR supports the operator to not only understand the temperature dynamics of the paver but also monitors the temperature of the in- and out-flowing material. As for the inflow of material, that means that the operator can improve in coordinating the truck loads. A better coordinating of incoming truck loads means less risk of wasting material or jeopardizing temperature. As for the outflowing material – Pave IR supports the conduct of compactors to ensure material has been compacted within the suitable temperature range. Compacting material that is too hot can lead to pushing the asphalt sideways which will result in surface irregularities whereas compacting material that is too cold can lead to cracks within the material. Both issues decrease the quality and the duration of the new pavement of the road.

The PAVE IR results from the live performance are illustrated below:

This pictures shows the differences from using a Shuttle Buggy and not using a Shuttle Buggy. Section 1-2 is paved without ShuttleBuggy. As you can see there are many Paver stops (indicted in green). The blue circle indicate that Material temperature is distributed uneven. As you can see the material differences strongly corelate with the paver stops.

The second picture shows a range of 50 meters paved with shuttle buggy As you can see from the screenshot we were able to reach 99,5 % homogeneity. In terms of temperature distribution this is an excellent result.

Next to the challenge of Thermal segregation which was tackled with Pave IR and the Shuttle Buggy – MOBA displayed their state-of-the-art leveling system: The Big Sonic Ski.

As smoothness is one of the most recent focus in Thai road construction, the Big Sonic Ski is the answer for this request. While automatically operating the screed of the paver, the Big Sonic Ski works without an artificial reference. One can sense straight from the ground. The BSS uses a special algorithm to smoothen out the height differences that it senses from the surface and converts the measurements into a smooth result.

Working with the Big Sonic Ski results in time & costs savings, higher quality and subsequently leads to longer duration of the road.

A very special thanks to SDC International and Roadtec who organized this event.

Paving new Vietnamese Formula 1

by mklingenhagenBlog, Success StoryPosted on Comments are Disabled


Paving new Vietnamese Formula 1 racetrack with MOBA’s PAVE-IR

In April the first Formula One race ever should have taken place in Vietnam. Sadly, Corona has upset these plans and the race in Hanoi was delayed to a date that has yet to be defined. Nevertheless, the racetrack was finished in time, and the pavers that paved the whole track were equipped with MOBA’s PAVE-IR system for temperature detection during paving. Altogether six Dynapac pavers were equipped with MOBA’s PAVE-IR thermal scan system and they also used the proven MOBA technology of Sonic-Skis.


PAVE-IR: Thermal visualization of asphalt installation in real time

Construction works on the Hanoi Street Circuit started in the beginning of 2019 and in October 2019 the construction staff was trained on PAVE-IR, a special but yet very simple to operate system, before paving started.

PAVE-IR allows a thermal visualization of the installation process in real time. Therefor the high-precision IR temperature scanner MTPS-100 provides a wide thermal profile of the built-in layer of up to 13 meters width. The visualization offers the possibility to detect points which might be affected by thermal segregation. With this information the construction company can react immediately.


Adrenaline and action: an exciting racetrack

About one third of the track was newly built, while the rest of the route is on public streets that have already been present. But of course they also had to be completely paved as they had not been constructed for Formula 1 races. In February 2020 the whole track was completed.

 
With 1.5 kilometers length, the racetrack includes one of the longest straights of Formula 1 racetracks. Here the drivers can go on full speed, that means up to 335km/h and here are also the stands for the 35.000 spectators.

It also features 23 bends that shall grant spectacular races. The Hanoi Street Circuit was designed by racetrack architect Hermann Tilke. Originally it should have taken place April 5th 2020, but as it was postponed because of Corona pandemic, let’s hope that soon the bolides speed through Hanoi.

XSite Pro in Taiwan

by thenkesBlog, Success StoryPosted on Comments are Disabled


XSite Pro in Taiwan

Taiwan is the latest country where MOBA AG has introduced their 3D XSite Excavator control system to support companies working more efficiently and more accurately, – saving money, time, and rework. Xsite allows your team to program every dig in 2D and 3D applications, reducing up to 90 percent of the surveying work on your site. With MOBA you’re equipped with full visibility into depth, height, inclination, and bucket position. Each dig. Every time. For any machine. The Taiwanese company JFCC works on a project in the south of Taichung City to build a new water reservoir with a timeline of over 5-6 years. JFCC works with over 12 excavators and more than 20 trucks to ensure fast and efficient dig out. In total, the project compromises the creation of 3 lakes whereas the bottom must be filled with 3 layers of material. The first layer is sand with a height of approximately 80 cm. The second layer is small rocks with sizes between 3-5 cm with an average height of 60 cm and the third layer of another 60 cm with big rocks sized between 10-15 cm.” 

JFCC put the distribution of material to the test. They used a strip of 400 meters, whereas 200 meters were filled and leveled in a traditional way and 200 meters were being processed using MOBA Xsite Pro on their excavator. Traditionally means that first a surveyor was employed to stake out the needed height for each material (sand, small rock & big rock). Afterward, the operator was using an excavator to follow the stakes of the surveyor to bring the material to grade and level. The second strip of 200 meters needed no surveyor but only MOBA Xsite Pro system installed on an excavator and processing needed tasks by moving independently.

The result of the difference of both strips are significant:

MOBA Xsite Pro performed the task in half the time with more precise finishing, meaning that the operator was able to exploit the height tolerance at a minimum level.

Why is this so important?

Especially in large projects saving (even up to) 1cm of the material makes a huge cost difference. Imaging the distribution of material for a given land size of 100000m². Every additional centimeter would equal the use of 100 tones of additional material and connected costs.
With XSite Pro you can not only work faster yet also more efficiently by cutting operational costs and costs of material.

Thank you very much to Yuan and his team for the feedback and pictures