Abstract
With the continuous growth of global warming and traffic volume, rutting deformation is common on road surfaces. A new type of pavement mixture, a semiflexible mixture, was proposed to solve the easy deformation and low riding quality of traditional pavement mixtures. It can be divided into pouring type and mixing type according to the construction method. However, there is little research on mixed semiflexible mixtures (i.e., multiplex organic hydraulicity (MOH) mixtures) in the current literature, so the deformation of pavement under driving loads was studied based on the MOH mixture in this paper. Four types of pavement composed of the traditional mixture and MOH mixture (i.e., AC13‐AC20, AC13‐MOH, MOH‐MOH, and MOH‐AC20) were selected to achieve the purpose of the research. Based on these four types of pavement, the deformation of the pavement was studied by simulations and experiments. The results show that the deformation of the upper layer is almost the same for these four types of pavement and that the deformation of the middle layer changes substantially for these four types of pavement. In regard to the deformation, the relationship is MOH‐MOH < AC13‐MOH < MOH‐AC20 < AC13‐AC20. In addition, the contribution rate of the deformation of the middle layer is much greater than that of the upper layer. The antideforming ability of the whole pavement can be improved by using the MOH mixture as the middle layer of the pavement, which means that the performance of the MOH mixture can achieve the best performance when it is applied to the middle layer.
Highlights
With the continuous growth of global warming and traffic volume, pavement damage is common on road surfaces, especially the rutting deformation of pavement, as shown in Figure 1 [1]
A new type of pavement mixture was proposed to solve the easy deformation and low riding quality of traditional pavement mixtures. is new mixture has the flexibility of asphalt mixtures and has the rigidity of cement mixtures, so it is called a semiflexible mixture or semirigid mixture [2]. e semiflexible mixture is divided into pouring type and mixing type according to the construction method [3]. e former is a combination of hot mixing and cold pouring, the process is complex, and the construction quality is challenging to control
The mixed semiflexible mixture is a kind of MOH mixture with an emulsified asphalt cement mixture as binder [4,5]. is can realize typical temperature construction, especially in alpine regions [5]. e mixed semiflexible mixtures have been of great interest to highway experts worldwide in recent years because of its convenient construction, energy consumption reduction, and environmental protection
Summary
With the continuous growth of global warming and traffic volume, pavement damage is common on road surfaces, especially the rutting deformation of pavement, as shown in Figure 1 [1]. Li et al studied the high-temperature performance of two kinds of doublelayer asphalt pavements composed of AC-13, AC-20, and SMA-13 mixtures using fractal dimensions based on fractal theory; the result showed that the deformation is divided into two stages (i.e., densification and flow deformation), ant that the top layer made of AC-13 presented obvious densification [24]. Hu et al studied the deformation of the asphalt concrete (AC) layer of pavement with different variables using the finite element method, such as the AC layer modulus, AC layer thickness, vertical wheel loads, and tire pressure. Jiang et al studied the influence of materials (i.e., AC-16, AC-20, AC25, and AC-13) and the thickness of double-layer asphalt pavement on the high-temperature performance, and a double-layer pavement structure with a 3 cm AC-16 surface layer and a 7 cm AC-20 bottom layer was recommended [27]. Where zi is the depth of the ith layer and ha is the thickness of the surface layer
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