Warm mix asphalt
View Patent ↗The disclosure is directed to a warm mix asphalt comprising a hydrated lime slurry additive, methods of producing the same, methods of producing an asphalt pavement and methods of paving a surface.
1. A method of making a warm mix asphalt composition comprising the steps of:
A) adding an asphalt stream into a mixer;
B) adding a hydrated lime slurry comprising between about 15% wt. to 40% wt. lime into the asphalt stream in an amount of about 5% wt. by total weight of asphalt;
C) adding aggregate into the mixer; and
D) mixing said asphalt, hydrated lime slurry and aggregate in the mixer to form a warm mix asphalt composition.
2. A method of making a warm mix asphalt composition comprising the steps of:
A) adding an asphalt stream into a mixer at an elevated temperature;
B) adding a hydrated lime slurry comprising between about 15% wt. to 40% wt. lime into the asphalt stream at an elevated temperature in an amount of about 5% wt. by total weight of asphalt;
C) adding aggregate into the mixer at an elevated temperature; and
D) mixing said asphalt, hydrated lime slurry and aggregate in the mixer to form a warm mix asphalt composition.
3. The method of making a warm mix asphalt composition according to claim 2 , wherein said mixer is in a continuous process plant.
4. A method of making a warm mix asphalt composition comprising the steps of:
A) adding an asphalt stream into a mixer at a batch processing plant at an elevated temperature;
B) adding aggregate into the mixer;
C) adding a hydrated lime slurry comprising between about 15% wt. to 40% wt. lime in an amount of about 5% wt. by total weight of asphalt;
D) mixing said asphalt, aggregate and hydrated lime slurry in the mixer to form a warm mix asphalt composition.
5. A method of making an asphalt pavement comprising the steps of:
A) adding an asphalt stream into a mixer;
B) adding a hydrated lime slurry comprising between about 15% wt. to 40% wt. lime into the asphalt stream in an amount of about 5% wt. by total weight of asphalt;
C) adding aggregate into the mixer;
D) mixing said asphalt, hydrated lime slurry and aggregate in the mixer to form a warm mix asphalt composition;
E) spreading said warm mix asphalt composition on a surface; and
F) compacting said warm mix asphalt composition to form an asphalt pavement on said surface.
6. A method of paving a surface comprising the steps of:
A) adding an asphalt stream into a mixer;
B) adding a hydrated lime slurry comprising between about 15% wt. to 40% wt. lime into the asphalt stream in an amount of about 5% wt. by total weight of asphalt;
C) adding aggregate into the mixer;
D) mixing said asphalt, hydrated lime slurry and aggregate in the mixer to form a warm mix asphalt composition;
E) spreading said warm mix asphalt composition on a surface; and
F) compacting said warm mix asphalt composition to pave said surface.