Abstract:
A method is shown for stabilizing clay bearing soils in which a silica compound is incorporated into the soils in addition to the application of lime. The silica compound can be either an amorphous, silica fume, a crystalline silica, a silica gel, sodium silicate, potassium silicate, finely ground glass or combinations thereof. The silicate compound promotes the formation of calcium silicate hydrates over the formation of calcium aluminate hydrates in the resulting pozzolanic reaction occurring in the clay bearing soils. The silica compound and lime can be incorporated into the soils in a single step.
Abstract:
A method of treating aggregate for use in hot mix asphalt compositions to promote adhesion between the aggregate material and bituminous binder by mixing together in a mixing tank (12) unslaked quicklime and an aqueous slaking medium to form a quicklime slurry and pumping the slurry through a conduit (70) to be mixed with aggregate from a feed bin (75) at a pugmill (74) of a hot asphalt plant.
Abstract:
A process is shown where an arc dust waste produced by an electric arc furnace is conducted to silos and converted to a reusable co-product by means of the addition of a special blend of high calcium and dolomitic quicklime, calcium stearate and pulverized waste paper. A dolomitic quicklime is stored in a silo (11) and dispensed through a conveyance means, such as screw conveyor (13) to a weigh hopper (15). Kraft paper stock is withdrawn from a paper roll (17) and passed to a hammermill shredder (19) where it is pulverized down to the cellulose, longstock paper fiber. The shredded, pulverized paper passes through a blower (21) and through a conduit (23) to a paper cyclone (25). Paper stock from the cyclone (25) passes through an outlet duct (27) to the weigh hopper.
Abstract:
A method is shown for stabilizing sulfate bearing soils in which a silica compound is incorporated into the soils with the soils being further stabilized by the application of lime. The silica compound can be either an amorphous, flume silica, a crystalline silica, a silica gel, sodium silicate, potassium silicate or combination thereof. The silica compound and lime can be incorporated into the soils in a single step.