Interlaminar Bonding Properties on Cement Concrete Deck and Phosphorous Slag Asphalt Pavement.

Guoping Qian,Huanan Yu,Xiangbing Gong,Shunjun Li

doi:10.3390/ma12091427

Abstract

The slippage damage caused by weak interlaminar bonding between cement concrete deck and asphalt surface is a serious issue for bridge pavement. In order to evaluate the interlaminar bonding of cement concrete bridge deck and phosphorous slag (PS) asphalt pavement, the shear resistance properties of the bonding layer structure were studied through direct shear tests. The impact of PS as a substitute of asphalt mixture aggregate, interface characteristics, normal pressure, waterproof and cohesive layer types, temperature and shear rate on the interlaminar bonding properties were analyzed. The test results indicated that the interlaminar bonding of bridge deck pavement is improved after asphalt mixture fine aggregate was substituted with PS and PS powder, and the result indicated that the shear strength of grooved and aggregate-exposed interfaces is significantly higher than untreated interface, the PS micro-powder or anti-stripping agent can also improve the adhesion between layers when mixed into SBS asphalt. This study provided important theoretical and practical guidance for improving the shear stability of bridge deck pavement.

Highlights

The early damage, especially the slippage and upheaval of asphalt pavement over cement concrete bridge deck is a serious issue for bridge operations
When the bridge is under an extensive heavy vehicle load, large shear stress is generated inside the bridge deck pavement which caused uncertain shear failure surface; or serious shear damage and diseases are caused because the horizontal shear resistance between the pavement layer and bridge deck is weak [1]
The asphalt mixture of AC-16C was is named as limestone asphalt mixture in which the asphalt mixture aggregate was limestone and used to compare the interlaminar bonding of Phosphorous slag (PS) as a substitute of asphalt mixture aggregate: filler and the other was named as PS asphalt mixture in which the fine limestone aggregate of one is named as limestone asphalt mixture in which the asphalt mixture aggregate was limestone

Summary

Introduction

The early damage, especially the slippage and upheaval of asphalt pavement over cement concrete bridge deck is a serious issue for bridge operations. The lack of high-quality aggregates is very common in many areas, the mining of raw aggregate have cost many environmental problems, and the problem has become more and more serious with the acceleration of the infrastructure construction process. Phosphorous slag (PS) is an industrial by-product produced in the process of phosphorus ore in a high-temperature environment. The accumulation of a large amount of PS occupies the land and seriously pollutes the environment [3]. The effective utilization of PS in the asphalt pavement would beneficial the highway construction and the environment from all prospects [4]

Methods

Results

Conclusion