ROLE OF FILLER IN BITUMINOUS MIXES

Fillers (filler aggregate) consists of mineral grains most of which pass 63µm sieve (EN 13043). This component represents 3–14% of the total aggregate by weight in the whole mixture regardless the type of asphalt mixtures (Stone Mastic Asphalt, Asphalt Concrete).

The filler tends to stiffen the asphaltic cement by getting finely dispersed in it.

 Various materials such as cement, lime, granite powder, stone dust and fine sand are normally used as filler in bituminous mixes. 

Cement, lime and granite powder are expensive and used for other purposes more effectively.

FILLER  MATERAIL:

Concrete filler materials include gravel, stone, sand, and rebar. Gravel, stone, and sand are used to reduce the cost of concrete. Rebars are used to strengthen the concrete.

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