Han Zhu, Assistant Professor
Civil and Environmental Engineering Department
Arizona State University, Tempe, AZ 85287-5306

Douglas D. Carlson
Director of Government Relations
Rubber Pavements Association, Tempe, AZ 85287

October, 1999

Table of Contents

ABSTRACT

INTRODUCTION

HIGHWAY NOISE BARRIERS

CRUMB RUBBER

MOLDING TECHNOLOGY

SPRAY TECHNOLOGY

BOND AGENT SELECTION AND MIX DESIGN

SPRAYING DEVICES AND PROCESSES

ACOUSTIC ABSORPTION TEST (ASTM C423-90a)

FURTHER WORK AND DISCUSSIONS

ACKNOWLEDGEMENT & REFERENCES