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A kind of preparation method of hard emulsified asphalt
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A technology for emulsified asphalt and hard asphalt, which is applied in building components, building insulation materials, buildings, etc., can solve the problems of hard emulsified asphalt that has not been researched and no reports of hard emulsified asphalt materials, etc., to achieve good economic effects, storage Good stability and low viscosity
Active Publication Date: 2018-11-30
CHANGAN UNIV
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At the same time, a new type of emulsion stabilizer developed by the company makes the industrial production of this hard emulsified asphalt possible, but there is no report of this hard emulsified asphalt material in the example.
The preparation of hard emulsified asphalt has not yet been studied in China
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Embodiment 1
[0025] The preparation method of the hard emulsified asphalt of the present embodiment comprises the following steps:
[0026] Step 1, taking by weighing various raw materials in mass percentages as shown in Table 1;
[0027] Table 1 Embodiment 1 Hard emulsified asphalt raw material formula
[0028]
[0029]
[0030] Step 2: Heat No. 50 hard asphalt to 145°C, then add lake asphalt, Qingchuan rock asphalt, dispersible latex powder and polyphosphoric acid to the heated No. 50 hard asphalt and stir evenly to obtain a mixture;
[0031] Step 3: Heat the water to 80°C, then add the organic stabilizer, inorganic stabilizer and emulsifier into the hot water and stir evenly to obtain soap liquid, and then use hydrochloric acid to dissolve the soap under the condition that the temperature of the soap liquid is 65°C The pH value of the solution was adjusted to 1.8;
[0032] Step 4, adding the soap liquid after pH adjustment in step 3 into a colloid mill and grinding for 2.5 minut...
Embodiment 2
[0038] The difference between the preparation method of hard emulsified asphalt in this example and the method described in Example 1 is that the heating temperature of No. 50 hard asphalt described in step 2 is 140°C, and the temperature of the soap solution described in step 3 The temperature is 60°C, and the grinding time in step 4 is 3 minutes.
[0039] After testing, all the indicators of the hard emulsified asphalt prepared in this embodiment meet the requirements of "Technical Specifications for Asphalt Pavement Construction" (JTG F40-2004).
Embodiment 3
[0041] The difference between the preparation method of hard emulsified asphalt in this example and the method described in Example 1 is that the heating temperature of No. 50 hard asphalt described in step 2 is 150°C, and the temperature of the soap solution described in step 3 The temperature is 70°C, and the grinding time described in step 4 is 2 minutes.
[0042] After testing, all the indicators of the hard emulsified asphalt prepared in this embodiment meet the requirements of "Technical Specifications for Asphalt Pavement Construction" (JTG F40-2004).
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Abstract
The invention provides a preparation method of hard emulsified asphalt, comprising the following steps: 1. Weighing various raw materials with a certain mass percentage: No. 50 hard asphalt, lake asphalt, Qingchuan rock asphalt, dispersible latex powder, polymer Phosphoric acid, emulsifier, inorganic stabilizer, organic stabilizer, water; 2. Stir No. 50 hard asphalt, lake asphalt, Qingchuan rock asphalt, dispersible latex powder and polyphosphoric acid to obtain a mixture; 3. Heat water to 80°C, then sequentially add organic stabilizers, inorganic stabilizers and emulsifiers into hot water and stir evenly to obtain soap liquid, and then use inorganic acid to adjust the pH value of soap liquid; 4. Grind in a colloid mill to obtain hard quality emulsified asphalt. The hard emulsified asphalt prepared by the invention has good flexibility, strong bonding performance, aging resistance, good storage stability, good low-temperature crack resistance and durability, can greatly improve the performance of the road surface, and prolong the service life .
Description
technical field [0001] The invention belongs to the technical field of emulsified asphalt processing for road engineering, and in particular relates to a preparation method of hard emulsified asphalt. Background technique [0002] In recent years, hard asphalt with high softening point, low penetration and good high temperature stability has begun to attract extensive attention from road workers. The penetrability of hard asphalt is small, so it has a higher viscosity than ordinary asphalt. It has strong adhesion after contacting with stone materials and is not easy to fall off. The stiffness modulus of the formed mixture is also high. Based on this, foreign countries have also carried out in-depth research on it. The research on hard asphalt first appeared in France in the 1980s, and hard asphalt was defined as asphalt with a penetration of less than 25mm / 10 (at a temperature of 25°C), and was divided into 15 / 25 and 10 / 20 And three grades of 5 / 10. And then it has been wi...
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