Changsha University of Science and Technology

Guoping Qian

Xi Li

Xiangbing Gong

Huanan Yu

Jun Cai

Changyun Shi

Wenchao Wu

Jianlong Zheng

Zhuang Wen

Ruyi Rao

Hao Xu

Mengcheng Xiao

Jiao Jin

Yalong Zhang

Shuai Liu

The present invention discloses a rubber material for asphalt roads having both self-stress ice breaking and phase-change snow melting functions and a preparation method thereof. A stable oil-in-water emulsion is prepared with n-tetradecane as a phase-change core material, then KH550 modification is performed to promote cross-linking of graphene and vinyl MQ silicone resin, and then a prepolymer is subject to hydrolytic polycondensation on a surface of the oil-in-water emulsion using an in-situ emulsion polymerization method to prepare modified graphene oxide-vinyl MQ silicone resin composite wall material phase-change microcapsules; vinyl MQ silicone resin undergoes a cross-linking reaction with hydrogen-containing silicone oil, a cross-linking agent of rubber, through active vinyl groups borne on the surface, thereby achieving a strengthening effect, effectively improving viscoelasticity and stress-strain behaviors of the silicone rubber, and preparing the rubber material for asphalt roads having both good elasticity and phase-change energy storage function.

Rubber material for asphalt roads having both self-stress ice breaking and phase-change snow melting functions and preparation method thereof

A device is for detecting compaction and shear strength characteristics of an asphalt mixture during construction compaction. The device includes a fixed frame and a detection system. The detection system includes a display, a control panel, a test claw, an electric motor, a lift switch, a torque sensor and a temperature sensor. The control panel includes a power switch for controlling the electric motor and a speed regulator for controlling a rotation speed of the test claw. An output end of the electric motor is connected to an input end of the torque sensor, and an output end of the torque sensor is connected to an input end of the test claw. An output end of the test claw is provided with a claw-shaped blade. The claw-shaped blade is provided therein with the temperature sensor.

Device for detecting compaction and shear strength characteristics of asphalt mixture during construction compaction

The present invention discloses a method for detecting compaction and shear strength characteristics of an asphalt mixture during construction compaction. The method mainly includes the following steps: using a device for detecting compaction and shear strength characteristics of the asphalt mixture; pressing a test claw into the asphalt mixture during construction; rotating the test claw slowly and uniformly to measure an internal temperature and a shear characteristic of the mixture during paving and subsequent compaction; calculating a corresponding compaction detection index based on the shear characteristic; and monitoring and guiding the construction quality and construction process accordingly based on the real-time detection index. The present invention measures the compaction detection index of the asphalt mixture during compaction simply, quickly and accurately. The present invention uses the compaction detection index together with a degree of compaction for dual control of asphalt pavement compaction.

Method for detecting compaction and shear strength characteristics of asphalt mixture during construction compaction

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Changsha, China

Guoping Qian