A field test method for the spraying amount of modified emulsified asphalt

Abstract

The invention relates to an on-site testing method for emulsified asphalt spreading amount. The on-site test method is as follows: take paper with a large water absorption rate and is not easily damaged; before testing, first weigh the quality of each paper and the area of ​​the paper, and then place the paper on the road surface to be tested; Finally, the amount Q of emulsified asphalt spraying is calculated; after correction, the mass of residue is divided by the area of ​​paper to obtain the spraying amount Q' of emulsified asphalt residue; the ratio of Q' to Q is the evaporation residue of emulsified asphalt It can be used to evaluate whether the quality of emulsified asphalt meets the specification requirements. Compared with the prior art, the paper used in the on-site test method of the amount of emulsified asphalt sprinkled according to the present invention has a certain water absorption rate, and the moisture in the emulsified asphalt will not be lost due to being absorbed. The quality is corrected to avoid the quality reduction caused by the aging of the asphalt during heating, so the accurate amount of emulsified asphalt can be obtained.

Description

technical field [0001] The invention belongs to the technical field of asphalt pavement quality control, and in particular relates to an on-site testing method for the amount of emulsified asphalt sprayed. Background technique [0002] Interlayer bonding is the key factor to ensure the quality of the pavement structure. Emulsified asphalt is generally used in the permeable layer, adhesive layer and seal layer. The amount of spraying plays a vital role in the quality of the pavement. Accurate asphalt dosage cannot be obtained, and there is no test method to detect emulsified asphalt dosage in the current regulations, which has buried hidden dangers for the quality of asphalt pavement. Therefore, the field test method of emulsified asphalt spraying amount has become a problem that must be solved in the quality control of pavement. [0003] At present, my country's "Highway Subgrade Pavement Field Test Regulations" JTGE60-2008 has made clear regulations on the test method for ...

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Problems solved by technology

[0003] At present, my country's "Highway Subgrade Pavement Field Test Regulations" JTGE60-2008 has made clear regulations on the test method for the amount of ordinary asphalt spraying. It uses a shallow enamel plate or hard kraft paper to be placed on the road surface to be tested, and the asphalt is sprayed. After the vehicle is sprayed with asphalt according to the normal construction speed and spreading method, the enamel plate or kraft paper that has received asphalt is taken away and weighed, and the net weight of the porcelain plate or kraft paper is removed to obtain the total mass of asphalt, and then the total mass of asphalt obtained is divided by the total spreading area To obtain the amount of asphalt spraying, but there is no method for on-site detection of emulsified asphalt in my country

In addition, if a shallow enamel plate is used to measure the spraying amount of emulsified asphalt, the enamel plate has edge effects, and the accurate value of the spreading area cannot be obtained; if kraft paper is used to measure the spraying amount, the emulsified asphalt at the edge will be lost due to the existence of moisture

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