Improving the Sound-Absorbing Capacity of Portland Cement Concrete Pavements Using Recycled Materials

摘要

As the Federal Highway Administration and individual states urge the development of high surface friction and lower noise generating pavements, much attention has been turned to porous portland cement concrete (PCC) pavements. This paper focuses on the use of porous recycled inclusions to expand on the concept of porous PCC. The three sources of noise on PCC pavements: engine, engine exhaust, and tire-surface interface are discussed. The methods to control noise on PCC pavements can be placed into three categories: control the source, control the way noise is received, and control noise propagation. Porous PCC pavements work by controlling noise propagation. Proposed research strategy techniques are outlined along with preliminary results. The methodology breaks down the concrete into its major components of air voids, aggregate, and cement paste. Aggregate porosity is determined from a statistical model for angular and rounded material. Concrete porosity and flexural strength are determined with two levels of cement paste using models.