31
Ekim
2013
international
construction
Türkiye
Ekİpman dosyası
Mikser teknolojilerinde yenilikler
Yeni kulelerde, GKA asfalt ilavesi iki
şekilde yapılabilmekte: bir geri kazanım
çemberi aracılığıyla ve bir asansör
tarafından doğrudan mikserin içinde. Bu
iki sistem birlikte kullanıldığında, %50’ye
varan oranda GKA kullanımı olanaklı
hale geliyor. Tesise GKA için ilave bir
paralel kurutma tamburu eklendiğinde ise
daha da yüksek oranlara ulaşmak mümkün.
eTower serisi, aynı zamanda ılık
asfalt alanında son dönemde ortaya çıkan
gelişmelerde de faydalanabilecek şekilde
tasarlanmış. Ilık asfalt karışımları, klasik
sıcak karışımlardaki gibi 140 ile 180°C arası
sıcaklıklar yerine, 90 ile 150°C arasında
üretiliyor.
Kaliteli bir ılık asfalt karışımının elde
edilebilmesi için, köpük bitüm gibi katkı
maddelerine ihtiyaç duyulmakta ve eTower
2500 modelinde de Marini’ye ait AQUABlack
köpük bitüm üretim sistemi dikkat çekiyor.
Sistem sayesinde, asfalt sıcaklığının 30°C’yi
aşan değerlerde düşürülebildiği ileri sürülmekte.
Ilık asfalt üretimi, enerji tüketiminin ve
emisyonların azalması gibi son derece açık
W
hatever the output needs,
manufacturers of mixing plants are
focussed on improving efficiency,
from consumption to more options for mixing
temperature and recipes, new control systems
and other environmental considerations such as
noise and fumes.
For instance, recycling old asphalt – also
known as reclaimed asphalt paving (RAP) – is
an absolute must in the industry, according to
Ammann.
In fact, Ammann claims to be the only
manufacturer that can offer plant technology to
produce new asphalt from 100% RAP and uses
a variety of technologies, depending on how
much RAP is added to the mix. It recommends
adding cold RAP directly to the mix for smaller
quantities of up to 30%, but provides a range of
specially designed drums for higher RAP rates
up to 100%. The RAH 100 drum, for instance,
can handle up to 100% RAP.
Ammann has also introduced a new asphalt
mixing plant, the Universal HRT, that is designed
to cope with up to 60% RAP. The plant features
a fully integrated parallel drum directly above
the mixer for optimal material flow, and has an
output capacity of 320 to 500 tonnes/hour.
Fayat-owned mixing plant manufacturer Marini
is also developing new mixing towers focussed
on coping with higher quantities of RAP.
The company has introduced the new eTower
family of asphalt plants, which currently
consists of two models – the eTower 2000 (150
tonnes per hour) and eTower 2500 (200 tonnes
per hour).
The towers feature two systems for introducing
RAP – a recycling ring and direct introduction
in the mixer via an elevator. Their combined use
means that recycling rates of nearly 50% can
be achieved, while even higher recycling rates
can be achieved by equipping the plant with an
additional parallel dryer drum for RAP.
The eTower range has also been designed to be
able to gain from recent developments in warm-
mix asphalt production – a process that allows
asphalt to be produced at a lower temperature of
around 90°C to 150°C instead of traditional hot
mix temperatures of 140°C to 180°C.
Adding to the mix
Additives such as foam bitumen need to be
added to the mix to achieve quality warm mix
asphalt and Marini’s eTower 2500 is fitted
with its AQUABlack foam bitumen production
system, with the result that the final asphalt
temperature can be cut by more than 30°C,
claims the company.
Warm mix production has the obvious
Adding to
the mix
Increasing the use of recycled materials is a
key focus for the mixing technology industry.
Helen Wright reports
>
Marini’nin yeni asfalt tesisi eTOWER, %50’ye yakın
oranda geri kazanıma olanak tanıyor
