Process for making asphalt paving compositions
Abstract
Abstract PARTICULATE EMISSIONS DURING PRODUCTION OF ASPHALT CONCRETE ARE CONTROLLED BY CONTRACTING WET AGGREGATE WITH AN ASPHALT COMPOSITION AT OR BEFORE INTRODUCTION OF THE AGGREGATE INTO A HEATED MIXING AND DRYING ZONE WHEREIN THE ASPHALT-AGGREGATE MIXTURE IS MOVED THROUGH A RELATIVELY HIGH VELOCITY, HEATED GAS STREAM IN THE MIXER FLOWING PARALLEL TO THE DIRECTION OF MOVEMENT OF THE ASPHALT MIXTURE THROUGH THE MIXING AND DRYING ZONE. THE PROCESS, IN ADDITION TO CONTROL OF PARTICULATE EMISSIONS, RESULTS IN LESS DAMAGE TO THE ASPHALT DUE TO AGING OR HARDENING, AND THE ABILITY TO ACHIEVE A MORE UNIFORM MIXTURE COMPACTION OF THE SAID ASPHALT CONCRETE BECAUSE THE PARALLEL FLOW ENABLES MORE UNIFORM TEMPERATURE CONTROL OF THE ASPHALT AND AGGREGATE MIXTURE ON DISCHARGING FROM THE MIXING AND DRYING ZONE. MEANS FOR AUTOMATING PRODUCTION OF THE PAVING COMPOSITIONS ARE DISCLOSED.
Inventors
- 👤 H Shearer
Bibliographic Details
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