AAC Blocks  is becoming more and more popular around the world， from western countries and then to developing countries. This unit is proposed to manufacture AAC Blocks by consuming the Fly-Ash as one of the prime raw material. Fly-Ash， a major raw material with 70% proportion in AAC Blocks， an indispensable by-product of Thermal Power Plants， is an environmental threat across the globe. Power plants are facing an ever increasing challenge disposal of this polluting agent. Main ingredients include fly ash， water， quicklime， cement， aluminum powder and gypsum. The block hardness is being achieved by cement strength， and instant curing mechanism by autoclaving. Gypsum acts as a long term strength gainer. The chemical reaction due to the aluminum paste provides AAC its distinct porous structure， lightness， and insulation properties， completely different compared to other  lightweight  concrete materials. The finished product is a 2.5 times lighter Block compared to conventional Bricks， while providing the similar strengths. The specific gravity stays around 0.6 to 0.65. This is one single most USP of the AAC blocks， because by using these blocks in structural buildings， the builder saves around 30 to 35 % of structural steel， and concrete， as these blocks reduce the dead load on the building significantly.

Grade

Particle Size
< 45 (μ) %

Specific Surface 
Area(cm2/gm)

Average Particle Size d50 in μm (CILAS 1064 LD)

Applications

CCC

60-85

14，000-18，000

30 ± 5

Autoclaved aerated light weight concrete (AAC Block)

CCC - 60

45-65

8，000-12，000

45 ± 5

Autoclaved aerated light weight concrete (AAC Block)

CCC - 70

65-80

9，000-13，000

40 ± 5

Autoclaved aerated light weight concrete (AAC Block)

CCC - 80

80 Min

10，000-14，000

30 ± 5

Autoclaved aerated light weight concrete (AAC Block)

CCC - 90

88 Min