Determination method of optimal asphalt-aggregate ratio of basalt fiber permeable asphalt mixture
A technology of basalt fiber and permeable asphalt, which is applied to roads, road repairs, roads, etc., can solve the problems of inaccurate data, large test volume, and great relationship, and achieve the effects of improving engineering efficiency, avoiding tediousness, and saving costs
Active Publication Date: 2018-09-28
YANGZHOU UNIV
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There are two aspects defects in such design method: the one, this type of method is a kind of empirical method, and the arbitrariness that different people determine is bigger, and has very big relationship with personal practical experience; Therefore, how to reasonably determine the optimum asphalt ratio of permeable asphalt mixture needs further research.
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[0032] Step 1. Selection of raw materials and grading:
[0033] The gradation design of permeable asphalt mixture PAC-13 is designed with reference to the mineral aggregate gradation range specified in CJJ / T 190-2012 "Technical Regulations for Permeable Asphalt Pavement". The determined synthetic gradation table of PAC-13 permeable asphalt mixture mixed with chopped basalt fiber is as follows.
[0034] The passing rate of each sieve hole in the gradation of PAC-13 permeable asphalt mixture
[0035]
[0036] Step 2. Determine the initial asphalt ratio:
[0037] The initial asphalt ratio of the permeable asphalt mixture PAC-13 is determined by referring to the thickness of the asphalt film adsorbed on the surface of the mineral aggregate specified in CJJ / T 190-2012 "Technical Regulations for Permeable Asphalt Pavements". The initial asphalt ratio is 4.5%.
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The invention discloses a determination method of an optimum bitumen-aggregate ratio of a basalt fiber permeable asphalt mixture. The determination method comprises the following steps that 1, raw materials are selected; 2, an initial asphalt-aggregate ratio is determined; and 3; the optimal asphalt-aggregate ratio is determined, and the optimal asphalt dosage of the permeable asphalt mixture is obtained. The determination method of the optimum bitumen-aggregate ratio of the basalt fiber permeable asphalt mixture is easy to operate, saves cost, avoids the tribulation test to determine the asphalt-aggregate ratio of the permeable asphalt mixture, significantly reduces the blindness and workload in the determination stage of the asphalt-aggregate ratio, and significantly improves the engineering efficiency.
Description
technical field [0001] The invention belongs to the research field of highway building materials, and in particular relates to a method for determining the optimum asphalt ratio of basalt fiber permeable asphalt mixture. Background technique [0002] As an open-graded asphalt mixture with interconnected voids, permeable asphalt mixture has been widely used at home and abroad for its remarkable water permeability, good anti-skid performance and the function of reducing road surface temperature. Foreign scholars believe that the reason for the scattering of large-void permeable pavement aggregates is mainly due to the viscosity of asphalt and insufficient adhesion to aggregates. The addition of additives can significantly improve the wear resistance of the mixture, but it will affect the performance of the permeable pavement. Void ratio, so sufficient tests should be carried out when adding it, in order to improve the durability of the pavement while controlling the void ratio...
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IPC IPC(8): E01C19/10
CPCE01C19/1054
Inventor 肖鹏王胜康爱红吴正光伏伟俐
Owner YANGZHOU UNIV