What is AAC?

Autoclaved aerated concrete (AAC), also known as autoclaved cellular concrete (ACC) or autoclaved lightweight concrete (ALC), was invented in the mid-1920s by the Swedish architect and inventor Johan Axel Eriksson. It is a lightweight, precast building material that simultaneously provides structure, insulation, and fire and mold resistance. AAC products include blocks, wall panels, floor and roof panels, and lintels.

It has been refined into a highly thermally insulating concrete-based material used for both internal and external construction. Besides AAC's insulating capability, one of its advantages in construction is its quick and easy installation, for the material can be routed, sanded, and cut to size on site using standard carbon steel bandsaws, hand saws, and drills.

Even though regular cement mortar can be used, 98% of the buildings erected with AAC materials use thin bed mortar, which comes to deployment in a thickness of one-eighth inch. This varies according to national building codes and creates solid and compact building members. AAC material can be coated with a stucco compound or plaster against the elements. Siding materials such as brick or vinyl siding can also be used to cover the outside of AAC materials.

AAC has been produced for more than 70 years, and it offers advantages over other cementitious construction materials, one of the most important being its lower environmental impact.

 AAC blocks advantages:

l         AAC’s improved thermal efficiency reduces the heating and cooling load in buildings.

l         AAC’s workability allows accurate cutting, which minimizes the generation of solid waste during use.

l         AAC’s resource efficiency gives it lower environmental impact in all phases of its life cycle, from processing of raw materials to the disposal of AAC waste.

l         AAC’s light weight also saves cost & energy in transportation.

l         AAC's light weight saves labour.

l         AAC's bigger size leads to faster masonry work.

l         AAC's light weight increases chances of survival during seismic activity.

Raw material: 

Cement, Lime, Flyash(Sand), Gypsum, Aluminum powder, Water.

AAC machinery:

Equipment list: 

The equipment will be divided into two parts: specialized equipment and universal equipment. 

Specialized equipment includes:  

1. Cutting equipment: tilting crane, cutting machine.   

2.Automatic Proportioning equipment: electronic measuring scale, slurry beating machine, slurry storage tank, slurry mixer. 

3. Pouring and autoclave related equipment:  aluminum powder mixer,  pouring & mixing machine,  moulds, side plates,  steaming cart,  carrier car. 

4.Conveying equipment: semi-product sling, end product sling. ferry car

Universal equipment includes: 

1.Pressure vessel equipment: boiler, autoclave. 

2. Crushing & milling equipment:  jaw crusher, ball mill 

3. Transportation equipment: bucket elevator, feeder machine, belt conveyor, slurry pump, screw conveyor, semi-product crane, grouping crane, finished product crane, rail, dragger. 

4. Environmental protection equipment: dust remover for jaw crusher, ball mill, storage bin 

5. Lab equipment

Hengxing AAC block machines:

Hengxing Company certification:

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