Choose the right tackifier
In the production of modified asphalt, the appropriate Asphalt High Viscosity Agent must first be selected based on factors such as the type of asphalt, purpose of use, and engineering requirements. Different tackifiers have different chemical structures and performance characteristics. For example, some tackifiers are effective in improving the high-temperature stability of asphalt, while others are excellent in enhancing low-temperature crack resistance. Common Asphalt High Viscosity Agents include resins, rubbers, thermoplastic elastomers, etc. For modified asphalt used in road construction, if the summer temperature in the area is high, resin tackifiers that can effectively increase the high-temperature viscosity of the asphalt can be given priority; if the winter is cold, an appropriate amount of rubber tackifier can be considered. To improve the low temperature performance of asphalt.
Determine the amount of tackifier to add
Determining the appropriate addition amount is the key to ensuring the performance of modified asphalt. Generally speaking, the amount of Asphalt High Viscosity Agent added needs to be determined based on specific engineering requirements and test results. Usually, the addition amount is about 3%-10% of the asphalt mass. If the amount added is too small, the expected viscosity-increasing effect may not be achieved; while if the amount added is too much, other properties of the asphalt may be affected, such as reduced flexibility and increased construction difficulty. In actual production, it is necessary to determine the optimal addition amount through a series of performance tests, such as penetration, softening point, ductility and other tests, in order to achieve comprehensive optimization of asphalt performance.
Mix evenly and add
In the modified asphalt production process, it is crucial to add Asphalt High Viscosity Agent evenly into the asphalt. Generally, mechanical mixing is used for mixing, and special asphalt mixing equipment, such as high-speed shear emulsifier, can be used. When adding a tackifier, pour it slowly into the asphalt being mixed while maintaining a stable mixing speed and temperature. The mixing time and speed also need to be adjusted according to the specific situation. Usually the mixing time is about 30 minutes to 1 hour, and the mixing speed is controlled at 1000-2000 rpm to ensure that the tackifier can be fully dispersed in the asphalt to form a uniform and stable Modified asphalt system.
Control production process parameters
In addition to the above steps, attention should also be paid to controlling other process parameters during the production of modified asphalt. Temperature is an important factor. Generally, when adding a tackifier, the temperature of the asphalt should be kept at about 150°C-180°C, which is beneficial to the melting and dispersion of the tackifier, and also ensures that the performance of the asphalt is not too high. influence. In addition, care should be taken to prevent air from being mixed into the asphalt during the mixing process, so as not to affect the quality and performance of the modified asphalt. After the production is completed, the quality of the modified asphalt needs to be tested to ensure that its performance indicators comply with relevant standards and engineering requirements before it can be used in actual projects.
