On-site test method of emulsified asphalt spraying amount

Abstract

The invention relates to an on-site test method of emulsified asphalt spraying amount, which particularly comprises following steps: (1) getting paper sheets being high in water absorption and not liable to break; (2) before test, weighing the mass and area of the paper sheets and placing the paper sheets on a pavement requiring to be tested; (3) after an asphalt spraying car passing through the pavement, calculating the emulsified asphalt spraying amount Q; and (4) after correction, dividing the mass of residue by the area of the paper sheets to obtain emulsified asphalt residue spraying amount Q', wherein a ratio value of the Q' to Q is the content of evaporated residue of the emulsified asphalt, which can be used for evaluating whether the quality of the emulsified asphalt satisfies a standard requirement or not. Compared with a method in the prior art, in the on-site test method of emulsified asphalt spraying amount, the employed paper sheets has a certain water absorption so that water in the emulsified asphalt is free of lost due to absorption. In addition, by means of correction of the emulsified asphalt residue amount, the emulsified asphalt is free from being aged and then reduced in quality during heating so that by means of the method, the emulsified asphalt spraying amount can be obtained accurately.

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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