During the past thirty years, interface bonding between pavement layers has been a topical subject worldwide to research. In this context, many researchers have developed and utilized their own devices to investigate the properties of pavement interfaces. In the absence of an international standard procedure for interface bonding, it is inevitable that testing results are not comparable in all cases. In addition, various conducted studies reveal that parameters such as temperature, loading conditions, materials and so on exert an influence on interface properties. This paper aims to deal with the matter effectively via a thorough and comprehensive review of interface bond testing to lay the groundwork for standardization procedure. For this purpose, first, a general overview of interface bond function and its impact on pavement performance is presented. Then, different types of interface bond test methods according to loading conditions are explained; furthermore, the configuration of various setups is discussed and their function is compared together. Finally, given the prior experiences, a framework for a methodical approach to a standard evaluation of pavement interfaces is presented.

The novel cement grout asphalt composite (CGAC) in this study is a new semiflexible composite consisting of open-graded hot mix asphalt (HMA) filled by injecting cement grout materials. The mechanical performance and engineering properties of the composite were evaluated through laboratory tests, including the Marshall stability test, rutting test, three-point bending test, split tensile test, and permeability test. Moreover, field test sections were constructed, and the laboratory test results and in situ results were compared. The results showed that, after grouting, the performance of composite materials was further enhanced, especially their high-temperature stability and moisture sensitivity. In fact, no permanent deformation (rutting) occurred, and the tensile strength ratio (TSR) was increased by 18.7%. In situ test applications revealed that compared with manual grouting, mechanized grouting technology had positive influences on field constructability and performance of CGAC regarding Marshall stability and splitting tensile strength. Findings of this study are beneficial to design, construction technology, and pavement maintenance.