Taisei Road Construction Co., Ltd.

Hideo Sasaki

Disclosed are a method of and an apparatus for producing a heated recyled asphalt mixture, in which a new material and a normal-temperature waste material, the water content of which is set at a limited range of values, are adapted to be mixed together in the ratio of (90 to 40):(10 to 60) in terms of weight. The temperature of heating the new material by means of a dryer is controlled to range from 190.degree. C. to 350.degree. C. so as to be in conformity with the above mixing weight ratio. Both the materials are mixed and kneaded together in a mixer at a kneading temperature of 150.degree. C. or more. The gas generated within the mixer is exhausted toward a chimney in a state wherein the amount exhausted is made adjustable.

Method of producing a recycled asphalt mixture

Disclosed is a plant of batch system for producing a composite paving material by using a bituminous waste pavement material, which comprises a heating means equipped with a new aggregate material introduction shoot and a bituminous waste material introduction shoot, the former shoot being connected to a new aggregate material supply passageway and the latter shoot being connected to a reproduction material supply passageway. The plant also comprises a ratio control section which is intended to compare with each other respective supplying indicated values of new and waste aggregate materials as measured by conveyor scales disposed with respect to their corresponding supply passageways, and thereafter proportionally control the value of the waste material relative to the value of the new material so that both the values may bear a predetermined mixing ratio. The ratio control section, thereafter, generates a command control signal to an inverter involved in the waste material supply passageway.

Plant of batch system for producing a composite paving material by using

Disclosed are a method of and an apparatus for producing a heated reproduction asphalt mixture, in which a new material and a normal-temperature waste material, the water content of which is set at a limited range of values, are adapted to be mixed together in the ratio of (90 to 40):(10 to 60) in terms of weight. The temperature of heating the new material by means of a dryer is controlled to range from 190.degree. C. to 350.degree. C. so as to be in conformity with the above mixing weight ratio. Both the materials are mixed and kneaded together in a mixer at a kneading temperature of 150.degree. C. or more. The gas generated within the mixer is exhausted toward a chimney in a state wherein the amount exhausted is made adjustable.

Growing community of inventors

Ageo, Japan

Hideo Sasaki