Indoor simulation method for temperature field and cooling durability of thermochromic asphalt pavement
A thermochromic, asphalt pavement technology, applied in the application of thermometers, thermometers, roads, etc., can solve the problems of difficult repeatability and control variables, so as to alleviate the urban heat island effect, flexible simulation methods, and shorten experiments cycle effect
Inactive Publication Date: 2020-03-13
SOUTHEAST UNIV
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However, since cooling requires actual cooling performance verification, it is difficult to achieve repeatability and control variables only by the test road and the actual environment
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[0025] The present invention will be further explained below in conjunction with the accompanying drawings.
[0026] see figure 1 , the indoor simulation method of thermochromic asphalt pavement and temperature field cooling durability performance of the present invention, comprises the following steps:
[0027] (1) Prepare thermochromic asphalt pavement test specimens. The upper layer (SMA-13) uses black thermochromic asphalt, and the middle layer (SUP-20) and lower layer (SUP-25) use SBS asphalt. Thermochromic asphalt is prepared from thermochromic powder and SBS. The preparation method is as follows:
[0028] 1) Put the SBS bitumen into the oven and heat until it completely melts, the temperature of the oven is 160°C;
[0029] 2) The black thermochromic powder is added to the SBS asphalt, and sheared continuously under high temperature conditions. The temperature of the high temperature is 140℃~145℃, the shearing speed is 500r / min, and the shearing time is 20min;
[003...
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The invention discloses an indoor simulation method for cooling durability of a thermochromic asphalt pavement and a temperature field. The method comprises the following steps: (1) a thermochromic asphalt pavement test piece is prepared; (2) the periphery and the bottom of the formed three-layer pavement structure are coated with a thermal insulation material; (3) holes are punched in the test piece at different depths to serve as sensor reserved holes, six sensor heads are installed in the punched sensor reserved holes and connected with an equipped sensor processor, and the temperature change trend of each depth is derived through a computer to serve as a temperature field; and (4) a cooling durability test is carried out on the thermochromic asphalt pavement test piece prepared in thestep (1), wherein the durability comprises freeze-thaw cycle aging, thermal aging and ultraviolet aging. According to the invention, convenience, accurate control and repeatability are realized.
Description
Technical field: [0001] The invention relates to the fields of temperature field measurement and cooling performance durability of asphalt pavement, in particular to an indoor simulation method of thermochromic asphalt pavement temperature field and cooling durability. Background technique: [0002] As the main surface form of my country's high-grade pavement, asphalt pavement has many advantages. However, due to the black pavement of the asphalt surface, the temperature of the pavement is too high in summer, and due to the viscoelastic-plastic properties of asphalt, under the repeated action of heavy loads, rutting and other diseases are prone to occur. Therefore, lowering the pavement temperature in summer can actively avoid the occurrence of high temperature diseases of asphalt pavement. Thermochromic asphalt holds great promise as a material that can reduce pavement temperature. However, since cooling requires actual cooling performance verification, it is difficult to...
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IPC IPC(8): G01K13/10G01N17/00G01N25/00E01C7/18E01C7/24
CPCE01C7/18E01C7/185E01C7/24G01K13/10G01N17/00G01N17/004G01N25/00
Inventor 于斌彭炜智黎威刘士南洪千哲周曜迪
Owner SOUTHEAST UNIV