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Functions of cast-in-place asphalt mixtures
Cast-in-place asphalt mixture is a dense-graded pavement material. When used for steel bridge deck pavements, it is essential to pay close attention to the high-temperature stability analysis of the mixture, taking into account factors such as asphalt content and the proportions of coarse and fine aggregates. Immediately after the cast-in-place asphalt mixture has been spread and leveled, the pavement surface should be inspected; any irregularities should be promptly adjusted manually, followed by thorough and uniform compaction. This type of mixture exhibits excellent characteristics, including impermeability, strong deformation resistance, freeze-thaw durability, oil resistance, aging resistance, good overall integrity, and outstanding performance in resisting low-temperature cracking and fatigue cracking. Previously, the high-temperature stability of cast-in-place mixtures was evaluated using tests such as the Marshall test and high-temperature rutting tests. This paper leverages currently available methods...
2012-11-28
Classification and Principle of Cast-in-Place Asphalt Mixtures
There are various types of poured asphalt mixtures. Below, we will introduce the classification and principles of poured asphalt mixtures based on their different types.
2012-11-21
Fatigue Characteristics of Cast-in-Place Asphalt Mixtures
Pouring-type asphalt mixtures are in a fluid state and generally do not require compaction; construction can be completed simply by using basic paving and leveling equipment, achieving the specified density and smoothness. Pouring-type asphalt mixtures are characterized by high mixing temperatures, high mineral powder content, high asphalt content, and long mixing times. These mixtures exhibit strong adaptability to steel bridge decks, particularly in their resistance to fatigue damage, which differs from that of conventional asphalt mixtures. The fatigue failure criteria applicable to pouring-type asphalt mixtures may not necessarily be suitable for mixtures with high stiffness moduli.
2012-09-05
Bending Creep Test Instructions
The vertical loading method avoids the drawback of inconsistent load caused by structural inadequacy, ensuring reliable performance.
2012-08-31
Introduction to Cast-in-Place Asphalt Mixtures
By examining the performance of different limestone fines and preparing cast-in-place asphalt mixtures using various limestone fines, this study investigates how different fines and their respective properties affect the thermal stability of cast-in-place asphalt mixtures. Cast-in-place asphalt mixture is a dense-graded pavement material; when applied to steel bridge decks, it is crucial to pay close attention to the analysis of its high-temperature stability. The study explores the impacts of material composition factors—such as asphalt content, coarse and fine aggregate proportions, and the fines-to-binder ratio—as well as structural factors—including structural thickness—on the high-temperature stability of cast-in-place asphalt mixtures. Furthermore, it proposes technical measures to enhance the high-temperature stability of these mixtures.
2012-08-29