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Method for determining content of SBS asphalt modifier
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A technology of asphalt modifier and determination method, which is applied in the field of SBS asphalt modifier content determination, can solve the problems of unreliable indirect methods and the lack of fast and accurate detection of SBS dosage in modified asphalt, so as to prevent illegal profit-making. Effect
Active Publication Date: 2011-10-19
RES INST OF HIGHWAY MINIST OF TRANSPORT +1
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That is to say, there is currently no method for quickly and accurately detecting the SBS dosage in modified asphalt, so in order to implement effective quality management and monitoring, a method that can quickly and accurately measure the content of SBS modifier in SBS modified asphalt is needed. technology
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Embodiment
[0016] 1. Preparing for the experiment:
[0017] 1. Before starting up, check whether the environment in the laboratory meets the required standards, so as to avoid the influence of temperature difference in the experiment. The standard temperature is suitable for below 30 degrees, and the humidity is below 55 degrees.
[0019] 3. Before use, check whether the accessories of the pressing plate are installed properly, and install the cleaned crystal for use.
[0020] 4. Try to keep the indoor temperature and humidity stable.
[0021] 2. Prepare asphalt:
[0022] 1. Configure standard concentration asphalt as required.
[0023] 2. Before testing the samples, put the configured asphalt into an oven at 160-180°C to keep the temperature constant.
[0024] 3. Test the concentration of SBS asphalt modifier:
[0025] 1. After the instrument is normal, do not put...
example 1
[0037] Example 1: Accurate sample preparation in the laboratory for confirmatory testing
[0038] When the concentration of SBS asphalt modifier is 3.0%, the measured concentrations are: 2.850%, 2.851%, 2.857%
[0039] When the concentration of SBS asphalt modifier is 4.0%, the measured concentrations are: 3.983%, 3.919%, 4.033%
[0040] When the concentration of SBS asphalt modifier is 5.0%, the measured concentrations are: 4.962%, 4.965%, 4.968%
[0041] The above test results are consistent with the actual concentration, and the error is within 0.3%. The error refers to the direct absolute difference. For example, the concentration of SBS asphalt modifier is 3.0%, and the error when the measured concentration is 2.850% is 3.0%-2.850 % = 0.15%.
example 2
[0042] Example 2: On-site sampling of SBS modified asphalt in Chongqing Yunwan Expressway
[0043] The project requires that the dosage of SBS be controlled according to 4±0.3%, and the measured concentrations are: 3.765%, 3.767%, 3.768%
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Abstract
The invention provides a method which can rapidly and accurately determine the content of a SBS asphalt modifier, and the main operations of the method are as follows: the method utilizes a Fourier transforminfraredspectrometer to test a plurality of SBS asphalt samples with known concentrations to further analyze and establish a SBS asphalt modifier model and then determines the content of themodifier of the SBS asphalt sample to be determined. The use of the method can rapidly and accurately measure the SBS content in the SBS modified asphalt and play a positive role in managing and controlling the quality of bulk modified asphalt, guaranteeing the durability of road surface, preventing unfair competition and profit making of suppliers, market standardizing and creating good social and economic benefits.
Description
technical field [0001] The invention relates to a method for measuring the content of SBS asphalt modifier. Background technique [0002] SBS is a block copolymer of styrene butadiene styrene, which belongs to thermoplastic rubber. A certain amount of SBS is added to hot asphalt, and under a certain temperature and mechanical shear force, it forms a uniform mixture with the asphalt, and the mixture is SBS modified asphalt. SBS modified asphalt has excellent high and low temperature road performance, which improves the ability of asphalt pavement to withstand the influence of adverse environmental factors and prolongs the service life of the pavement. Although the production process of SBS modified asphalt is relatively complicated, it can be seen from indoor tests, field test roads, and actual project paving that as long as the combination of better quality modified asphalt processing equipment and on-site mixing equipment is selected, qualified asphalt can be produced. Mo...
Claims
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Application Information
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