Test method for determining optimal intermittent time of intermittent heating and self-healing of steel bridge deck pavement

Abstract

The invention relates to the technical field of steel bridge deck asphalt self-healing, provides a test method for determining optimal intermittent time of intermittent heating self-healing of a steelbridge deck pavement, and aims to solve problems that the temperature of the lower part of the existing steel bridge deck asphalt pavement is difficult to directly obtain and the optimal intermittenttime of intermittent heating cannot be accurately obtained through calculation. The method comprises the following steps: S1, forming a plurality of groups of rut plate test pieces through a wheel rolling method according to a target mix proportion of the paving design thickness of the asphalt mixture of the steel bridge deck to the material design, and cutting the rut plates into small beam testpieces; S2, taking 2*m small beam test pieces, carrying out a three-point bending test through a three-point bending testing machine, and acquiring initial breaking strength F0; and S3, correspondingly splicing and stacking the two fractured small beam test pieces in m groups respectively, then fastening the two fractured small beam test pieces by using a clamp, and carrying out an intermittent heating self-healing test. The method is especially suitable for self-healing detection of the asphalt paving layer of the steel bridge deck, and has a high social use value and an application prospect.

Description

technical field [0001] The invention relates to the technical field of asphalt self-healing on steel bridge decks, in particular to a test method for determining the best interval time for intermittent heating self-healing of steel bridge deck pavements. Background technique [0002] Cracking and failure of steel bridge deck pavement is the most typical disease type of asphalt pavement. When cracks and other diseases appear on the steel bridge deck pavement, the bonding layer between the pavement and the steel bridge deck is vulnerable to rainwater erosion, and the traffic load, etc. Under the action, the pavement will crack and deteriorate and even cause the steel bridge deck to corrode, thereby reducing the service life of the steel bridge deck. However, steel bridge deck pavement is often used on viaducts that are relatively busy and have fewer lanes. Traditional repair techniques such as asphalt overlay method will have a greater impact on traffic due to the long closed ...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the deficiencies of the prior art, the present invention provides a test method for determining the best intermittent heating self-healing interval time of the steel bridge deck pavement, which overcomes the deficiencies of the prior art, has a reasonable design and a compact structure, and aims to solve the existing The temperature of the lower part of the asphalt pavement on the steel bridge deck is difficult to obtain directly, and the optimal interval time of intermittent heating cannot be obtained accurately by calculation

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