Extraction of indoor emulsified asphalt sand seal layer test piece and measurement method of porosity
A technology of emulsified asphalt and measurement method, applied in measurement device, sampling device, permeability/surface area analysis, etc., can solve problems such as narrow application range, and achieve the effect of reducing the influence of human factors and easy test operation.
Inactive Publication Date: 2018-09-14
SHENYANG JIANZHU UNIVERSITY
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Problems solved by technology
The gravity method in water is suitable for the determination of dense asphalt concrete specimens with a water absorption rate of less than 0.5%, but most of the actual asphalt concrete has a void ratio greater than 0.5%, so the scope of application of this method is too narrow
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[0040] The implementation of the present invention will be described in detail below in conjunction with specific examples, so that the process of solving technical problems and achieving technical effects of the present invention can be fully understood and implemented accordingly. The embodiments of the present application and the combinations of the various features in the embodiments without conflict are within the protection scope of the present invention.
[0041] The specific steps for preparing the sand seal layer specimen are as follows:
[0042](1) In order to facilitate the removal of the sand seal layer specimen, a layer of polytetrafluoroethylene film was laid between the sand seal layer and the original road surface. Due to the limitation of the size of the hanging basket and in order to restore the most realistic fit between the road surface and the sand seal layer and the depth of the structure, while considering the puncture resistance during rolling molding, ...
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Abstract
The invention discloses a method for extracting an indoor emulsified asphalt sand sealing layer test piece and measuring porosity. The method for measuring the porosity of an indoor emulsified asphalt sand sealing layer comprises the following steps: (1) extracting an emulsified asphalt sand sealing layer test piece; (2) measuring the gross volume density gamma(f) of the emulsified asphalt sand sealing layer test piece with a sealing film process; (3) measuring the maximum theoretical density gamma(t) of the emulsified asphalt sand sealing layer test piece with an asphalt impregnation process; and (4) substituting gamma(f) and gamma(t) into a formula shown in the specification, and calculating the porosity. The method disclosed by the invention fills in gaps in the method for extracting the emulsified asphalt sand sealing layer and measuring the porosity, and a reliable and feasible method for separately studying the performance of the emulsified asphalt sand sealing layer is provided; moreover, the method is simple to operate, the extraction integrity of the emulsified asphalt sand sealing layer is high, the man-made influence is little, the cost is low, and the pollution is avoided; the method for measuring the porosity of the emulsified asphalt sand sealing layer has relatively high innovativeness; an effective detection method is provided for scientific research institutes and construction and detection units; and a basis is provided for improving the project quality.
Description
technical field [0001] The invention belongs to the field of design and construction of an emulsified asphalt sand seal, in particular to a method for extracting an indoor emulsified asphalt sand seal and measuring the void ratio. Background technique [0002] As the research on pavement performance becomes more mature, people in the industry have fully realized that there is a high correlation between water damage and void ratio. The porosity of asphalt mixture is one of the important indicators to ensure the quality of asphalt pavement, especially highway asphalt pavement. The porosity of asphalt mixture has been studied by many scholars, but the porosity of emulsified asphalt sand seal layer is seldom studied. [0003] The porosity of asphalt mixture can be measured by ordinary Marshall specimens, but there is no feasible method clearly proposed in the existing codes for the extraction of emulsified asphalt sand seal layer and the measurement of porosity. The emulsified...
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IPC IPC(8): G01N15/08G01N1/04
CPCG01N1/04G01N15/088
Inventor 孙雅珍顾章义王金昌孙艳玲苑学众郭政刘畅
Owner SHENYANG JIANZHU UNIVERSITY