METHOD AND APPARATUS FOR PRODUCING ASPHALT MIXTURE HEATED BY HEAT EXCHANGE UTILIZING WASTE BITUMINOUS PAVING MATERIAL

摘要

PURPOSE:To obtain a reclaimed asphalt mixture of stable quality similar to a new material, by mixing a material to be reclaimed, obtd. by crushing a waste bituminous paving material, with a new aggregate heated to a specified temp. to thereby effect heat exchange therebetween. CONSTITUTION:A waste material obtd. by cutting asphalt-paved plates with a cutter or crushed waste material obtd. by a crusher is placed in a waste material bin 8. Asphalt, an aggregate, the waste material, stone powder, etc. are weighed by metering tanks 4a, 4b, 4c and introduced into a mixer where they are mixed together in such a proportion that a mixture consisting of the asphalt, the aggregate, the stone powder, etc. accounts for 100pts.wt. The mixing ratio of these components varies according to the quality of the waste material, the particle size of the new aggregate, the purpose of use, temp. change, etc. During mixing in the mixer, the waste asphalt material, the asphalt, the stone powder, etc. are mixed with the new aggregate heated to 200-250 deg.C, whereby the temp. of the mixture approaches about 160 deg.C which is the desired temp.