Autoclaved aerated concrete (AAC) BLOCKS MAKING PLANT

Description

Autoclaved aerated concrete (AAC) is a lightweight, precast, foam concrete building material suitable for
producing concrete masonry unit (CMU) like blocks. Composed of quartz sand, calcined gypsum, lime,
cement, water and aluminum powder, AAC products are cured under heat and pressure in an autoclave.
AAC was perfected in the mid-1920s by the Swedish architect and inventor Dr. Johan Axel Eriksson,
working with Professor Henrik Kreüger at the Royal Institute of Technology. The process was patented in 1924.
In 1929, production started in Sweden at the city of Yxhult. From “Yxhults Ånghärdade Gasbetong” later
became the rst registered building materials brand in the world: Ytong. Another brand “Siporex” was
established in Sweden in 1939 and presently licences and owns plants in 35 locations around the world. The
second major international cellular concrete Hebel brand goes back to company founder and technicians
Josef Hebel from Memmingen. In 1943, the rst Hebel-plant was opened in Germany.
AAC products may be used for both interior and exterior construction, and may be painted or coated
with a stucco or plaster compound to guard against the elements, or covered with siding materials such as
veneer brick or vinyl siding. In addition to their quick and easy installation, ACC materials can be routed,
sanded, or cut to size on site using standard power tools with carbon steel cutters.
ADVANTAGES :
AAC has been produced for more than 70 years, and it offers several advantages over other cement
construction materials, one of the most important being its lower environmental impact.
Improved thermal efciency reduces the heating and cooling load in buildings.
Autoclaved aerated concrete combines insulation and structural capability in one material for walls,
oors, and roofs. Its light weight/cellular properties make it easy to cut, shave, and shape, accept nails
and screws readily, and allow it to be routed to create chases for electrical conduits and smallerdiameter plumbing runs. This gives it design and construction exibility, and the ability to make easy
adjustments in the eld.
Porous structure gives superior re resistance.
Workability allows accurate cutting, which minimizes the generation of solid waste during use.
Resource efciency gives it lower environmental impact in all phases of its life cycle, from the
processing of raw materials to the disposal of waste.
Lightweight saves cost and energy in transportation, labour expenses, and increases chances of
survival during seismic activity.
Larger size blocks leads to faster masonry work.
Reduces project cost.
Environmentally friendly : It produces at least 30% less solid waste than traditional concrete. There is a
decrease of 50% of greenhouse gas emissions.
Fire resistant : As with regular concrete, AAC is re resistant.
Great ventilation : This material is very airy and allows diffusion of water. This reduces the humidity inside
the building. AAC will absorb moisture and release humidity. This helps to prevent condensation and
other problems that are related to mildew.
Non-toxic : There are no toxic gases or other toxic substances in autoclaved aerated concrete. It
neither attracts rodents or other pests nor can it be damaged by such.
Accuracy : The panels and blocks made of autoclaved aerated concrete are produced to the exact
sizes needed before leaving the factory. There is less need for on-site trimming. Since the blocks and
panels t so well together, there is less use of nishing materials such as mortar.
Long lasting : The life of this material is extended because it is not affected by harsh climates or extreme
weather changes. It will not degrade under normal climate changes.

AAC PLANT PRODUCTION CAPACITY :
SMALL PLANT 30 TO 150 CBM
AAC
BLOCKS
SIZES
L H W
600 200 100 MM
600 200 150 MM
600 200 200 MM
MIDDLE PLANT: 200 TO 400 CBM
LARGE PLANT: 500 TO 1000 CBM