Abstract
Construction and demolition waste material is of great potential for use in pavement engineering. This paper aims to investigate the feasibility of ceramic waste aggregate (CA) used in cooling asphalt pavement through a series of test methods and simulation techniques. Stone mastic asphalt (SMA) containing 10%, 20%, 30%, 40%, and 50% coarse ceramic waste aggregate (CASMAs) was first designed using the Marshall method. Afterward, the road performance and thermal insulation performance of the five different CASMAs were assessed by a comprehensive lab test, including a wheel rutting test, moisture susceptibility test, bending beam test, fatigue beam test, and indoor thermal insulation test. Finally, a 2D finite-element (FE) model was developed to investigate the transient thermal field and rutting deformation response of the cooling asphalt pavement with CASMAs. Results show that CASMAs experienced degradation of rutting resistance, moisture susceptibility, and anti-cracking performance while still meeting technical requirements with CA content of up to 40%. On the other hand, CASMAs can cool the pavement’s temperature by 11.5 °C at the bottom of asphalt layers. The permanent rutting deformation of cooling asphalt pavement was 45.36% smaller than that of conventional asphalt pavement without CASMAs. Based on the test results and numerical simulation results, the optimum content of ceramic waste aggregate in stone mastic asphalt was recommended as 40%.
Highlights
Asphalt pavement is one of the most widely applied transportation methods for passengers due to its high evenness, comfort, and low noise [1]
A freeze-thaw indirect tensile test to assess moisture susceptibility at the freeze-thaw condition; (c) a three-point bending beam test to investigate resistance to cracking at low temperature; (d) a thermo-physical parameter test; (e) a mean texture depth (MTD) test and a British pendulum number (BPN) test to assess the skidding resistance of CASMAs; (f) a three-point fatigue beam test to study the fatigue resistance of CASMAs; (g) a thermal insulation test to investigate the insulation effect of CASMAs’ surface course
This paper investigated the feasibility of utilizing ceramic waste as the coarse aggregate in cooling asphalt pavement
Summary
Asphalt pavement is one of the most widely applied transportation methods for passengers due to its high evenness, comfort, and low noise [1]. With the high solar heat absorptivity of asphalt, this black pavement usually suffers an extraordinary increase in structural temperature on hot days [2]. When subjected to both heavy traffic load and high temperature, this black pavement faces a high risk of rutting deformation because of the viscous flow of asphalt mixture. Presents continuous spatiotemporal variation with periodic climatic conditions During this the heat is conducted through the surface course, road base, and subgrade, leading to a complex variation, the heat is conducted through the surface course, road base, and subgrade, leading to a and changeable thermal field. Thermal field of the asphalt structure under complex and changeable thermal field. the the thermal field pavement of the asphalt pavement outdoor environmental conditions should be regarded as a transient thermal field.
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