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发明授权
CN107489082B 一种沥青混合料变气压拌和装置及方法 有权

一种沥青混合料变气压拌和装置及方法
摘要：
本发明公开了一种沥青混合料变气压拌和装置及方法，用于增强沥青‑集料的界面粘结力。将定量的集料与矿粉分别放于密封拌料锅和矿粉添加机构内，沥青放入恒温沥青泵送塔内，然后对集料与矿粉进行抽真空处理；在设定温度与真空条件下将集料、沥青与矿粉进行充分拌和；最后，边拌和边慢慢恢复锅内的气压，完成拌和过程。本发明利用气压差产生的面力将沥青压入常态下难以进入的集料开口孔隙内部及被空气膜隔开的集料表面，据此可大大增大沥青‑集料的接触面积，从而提高沥青‑集料界面的粘结力。本发明可有效增加沥青‑集料的界面强度，显著提高沥青混合料的抗水损害与抗疲劳破坏能力，达到延长沥青路面使用寿命的目的。
摘要（英）：

The invention discloses a variable-air-pressure mixing device and method for an asphalt mixture. The purpose is to enhance interfacial adhesive force of asphalt-aggregate. The quantitative aggregate and mineral powder are correspondingly placed in a sealed mixing pot and a mineral powder adding mechanism, the asphalt is put into a constant temperature asphalt pumping tower, and then vacuum pumping treatment is conducted on the aggregate and the mineral powder; and the aggregate, the asphalt and the mineral powder are fully mixed under the set temperature and the vacuum condition; and finally, air pressure in the pot is slowly restored while mixing, and the mixing process is completed. According to the variable-air-pressure mixing device and method for the asphalt mixture, surface force produced by the pressure difference is utilized to press the asphalt into an aggregate opening pore which is difficult to enter under the normal condition and the aggregate surface separated by an air film so that the contact area of the asphalt-aggregate can be greatly increased, and interfacial adhesive force of the asphalt-aggregate is improved; and the interfacial strength of the asphalt-aggregate can be effectively enhanced, the water damage resistance and the anti-fatigue damage capacity of the asphalt mixture are improved remarkably, and the purpose of prolonging the service life of asphalt pavement is achieved.

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