Abstract A machine for concurrently laying a dual-layered cementitious composition on a base surface with the layers having different compositions. A self-propelled main frame has an adjustable platform frame overlying the main frame. Adjustable support elements are coupled to the main frame for changing the position of the main frame to conform with the grade characteristics of the base surface. A first receiving unit is coupled to and is extended in front of the main frame and receives the first cementitious composition. The first receiving unit includes a first strike-off element extending transversely to the normal direction of movement of the machine and is spaced a predetermined distance above the base surface. Upon movement of the machine forwardly, a bottom layer of the first composition is formed and shaped. A second receiving unit is coupled to and is extended between the main frame and the first receiving unit for receiving the second cementitious composition. The second receiving unit also contains a second strike-off element which extends transversely to the normal direction of movement of the machine and is spaced a predetermined distance above the first strike-off means. Upon movement of the machine forwardly, an upper layer of the second composition is formed on top of the first layer. A longitudinally extending slip-form is suspended from the main frame rearwardly of the first and second receiving units. As the machine moves forward the slip form passes over the top of the second cementitious composition thereby finishing its top surface.
A method of concurrently laying a multiple layered pavement on a base surface by use of a single machine having a normal direction of movement, said machine comprising: a movable frame; a first means attached to a front portion of said frame for receiving a first composition; a first strike-off means attached to said frame behind said first receiving means and being positioned generally transversely of the normal direction of movement of said frame for determining a top level of said first composition; a second means attached to said frame for receiving said second composition and depositing said second composition on top of said first composition; and a second strike-off means attached to said frame behind said second receiving means and being positioned generally transversely to the normal direction of movement of said frame for determining a top level of said second composition; said method comprising: depositing a first homogeneous cementitious composition in a plastic condition on said base surface in front of said first means for receiving said first composition; leveling said first composition with said first strike-off means; depositing a second homogeneous cementitious composition in a plastic condition into said second means for receiving the second composition; leveling said second composition by use of said second strike-off means; and whereby all of the steps of said method are performed simultaneously.
Claim 2
Independent Claim
222 words
A method of concurrently laying a multiple layered pavement on a base surface by use of a single machine having a normal direction of movement, said machine comprising: a movable frame; a first means attached to a front portion of said frame for receiving a first composition; a first strike-off means attached to said frame behind said first receiving means and being positioned generally transversely of the normal direction of movement of said frame for determining a top level of said first composition; a second means attached to said frame for receiving said second composition and depositing said second composition on top of said first composition; and a second strike-off means attached to said frame behind said second receiving means and being positioned generally transversely to the normal direction of movement of said frame for determining a top level of said second composition; said method comprising: depositing a first homogeneous cementitious composition in a plastic condition on said base surface in front of said first means for receiving said first composition; leveling said first composition with said first strike-off means; depositing a second homogeneous cementitious composition in a plastic condition into said second means for receiving the second composition; leveling said second composition by use of said second strike-off means; and whereby all of the steps of said method are performed simultaneously.
Claim 3
Dependent Claim
18 words
The method of claim 1 whereby said first composition is formed of different material than the second composition.
Claim 4
Dependent Claim
19 words
The method of claim 1 including the step of slip-forming the first and second compositions to a predetermined shape.