Method and device for blocking pores of porous asphalt mixture, frost heaving method of blocked mixture and frost heaving-resistant performance evaluation method

A kind of technology of asphalt mixture and mixture, which is applied in the direction of material inspection, weighing by removing certain components, etc., can solve the problems of unestablished frost heaving performance, and achieve the effect of convenient production and simple operation

Active Publication Date: 2018-02-09
HOHAI UNIV
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Problems solved by technology

However, in the field of performance evaluation of porous asphalt mixture, there is no established test method for frost heave performance after pore plugging, so it is necessary to invent a method for evaluating the frost heave performance of porous asphalt mixture after internal pore blockage

Method used

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  • Method and device for blocking pores of porous asphalt mixture, frost heaving method of blocked mixture and frost heaving-resistant performance evaluation method
  • Method and device for blocking pores of porous asphalt mixture, frost heaving method of blocked mixture and frost heaving-resistant performance evaluation method
  • Method and device for blocking pores of porous asphalt mixture, frost heaving method of blocked mixture and frost heaving-resistant performance evaluation method

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Embodiment

[0054] The following examples illustrate the test method of frost heave performance of porous asphalt mixture under pore blockage. The porous asphalt mixture to be evaluated in the examples is OGFC-13, and its gradation, asphalt content BC, and void ratio VV are shown in Table 1.

[0055] The OGFC-13 that the embodiment of table 1 adopts

[0056]

[0057] 1. Preparation of asphalt mixture pore plugging device and pore plugging

[0058] Prepare the pore blocking device of the present invention consisting of a top cover, a cylindrical container and a base, and check whether the top cover and the cylindrical container, the cylindrical container and the base can be screwed tightly.

[0059] Press the loose asphalt mixture of OGFC-13 high temperature mixing in table 1, and adopt the Marshall test piece of Marshall compaction method molding OGFC-13 in the cylindrical container of the present invention, after the cooling of the test piece, the The two ends are screwed tightly wi...

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Abstract

The invention discloses a method and device for blocking pores of a porous asphalt mixture, a frost heaving method of a blocked mixture and a frost heaving-resistant performance evaluation method. A bottom cover and a base are screwed on left and right sides of a cylindrical container containing a porous asphalt mixture test specimen. Through injection of a suspension of clay and clean water intoa top cover and base multiple times and drying multiple times, pores of a porous asphalt mixture are gradually blocked through clay particles. The mixture for pore blocking is wrapped with sponge, fully absorbs water and is frozen so that frost heaving of the mixture after pore blocking is realized. Through a Cantabro scattering test, a change rate of the scattering loss of the porous asphalt mixture before and after frost heaving evaluates frost heaving resistance after pore blocking.

Description

technical field [0001] The invention relates to porous asphalt mixture and belongs to the field of durability evaluation of porous asphalt pavement. Background technique [0002] In order to improve the functions of urban ecosystems and reduce the occurrence of urban flood disasters, my country has vigorously advocated the construction of "sponge cities" since 2012, and issued a series of planning, encouraging policies and implementation guidance. As an important aspect of the construction of "sponge city", the porous asphalt pavement with the functions of "seepage, stagnation, storage, purification, utilization and drainage" has received extensive attention and is considered to be the key to the success of the construction of "sponge city". In porous asphalt pavement, the porous asphalt mixture paved on the surface plays an important role in seeping water downwards and draining outwards through the abundant interconnected pores inside. The durability of porous asphalt mixt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/42G01N5/04
CPCG01N5/04G01N33/42
Inventor 陈俊姚成汪浩马谢
Owner HOHAI UNIV
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