Testing device and evaluating method for water stability of water-permeable bituminous mixture
A technology of asphalt mixture and water stability, which is applied in the direction of applying repeated force/pulsation force to test the strength of materials, and weighing by removing certain components, which can solve the problem of inaccurate simulation of objective environment and conditions, and reliable evaluation conclusions The performance is not strong, the accuracy of the evaluation results needs to be improved, and the effect of avoiding temperature unevenness and ensuring temperature uniformity is achieved.
Inactive Publication Date: 2014-06-25
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology
Therefore, the existing water stability evaluation methods cannot accurately simulate the objective environment and conditions in reality, the accuracy of the evaluation results needs to be improved, and the reliability of the evaluation conclusions is not strong
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[0031] a kind of like figure 1 and figure 2 The shown test device for the water stability of the permeable asphalt mixture includes a test container 2 , a loading system 3 and a water bath constant temperature control device 1 . The test container 2 of this embodiment is a rectangular parallelepiped container made of iron. The size of the bottom plate of the test container 2 is 450mm×450mm, and the height is 300mm. The top of the test container 2 is covered with a movable cover plate 21 with a central opening of φ80mm.
[0032] The central area of the test container 2 in this embodiment (300mm×300mm area in the center) is provided with a test piece accommodating area 7 for fixing the test piece 10, and the test piece accommodating area 7 is mainly fixed on the bottom of the test container 2 cavity The metal parts are surrounded by metal parts. The metal parts include four angle iron pieces 5 (vertical angle iron pieces) distributed along the four corners of a rectangle. T...
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The invention discloses a testing device and an evaluating method for water stability of a water-permeable bituminous mixture. The testing device comprises a testing container, a loading system and a water-bath constant temperature control device connected with the testing container; a to-be-tested piece accommodating area is arranged in the testing container; and the loading system comprises a loading rod and a loading base which are connected with a servo loading testing machine. The evaluating method provided by the invention comprises the steps of: firstly, assembling the testing device; weighting the to-be-tested piece and recording the weight G1 of the to-be-tested piece; starting the water-bath constant temperature control device and forming water bath in the testing container, and keeping constant temperature after reaching a preset temperature; starting the servo loading testing machine to dynamically load the to-be-tested piece back and forth; if the to-be-tested piece is loosened after loading, confirming as being unqualified; otherwise, washing and drying, and then weighting and marking as G2; and calculating a stripping rate according to a formula. The bigger the stripping rate value is, the worse the water stability is. The testing device provided by the invention has the advantages of simple structure, low cost, convenience in assembling, high testing precision, and the like.
Description
technical field [0001] The invention belongs to the technical field of asphalt mixture performance evaluation, and in particular relates to a test device and an evaluation method for evaluating the water stability of asphalt mixture. Background technique [0002] For the permeable asphalt pavement, its porosity is large, the internal voids are many and interconnected, rainwater easily enters the interior of its structure, and it will be saturated when the rainfall is large; after rain, part of the rainwater will stay in the permeable asphalt due to poor lateral drainage Bottom of the mix. When water accumulates inside the asphalt mixture, under the repeated action of high-speed vehicle loads, a large hydrodynamic pressure will be generated inside the mixture, so that the water-permeable asphalt mixture is relatively densely graded. More prone to water damage. [0003] In the prior art, water immersion Marshall method, freeze-thaw splitting method, immersion rutting test an...
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IPC IPC(8): G01N3/32G01N5/04
Inventor 田小革于斌
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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