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选沥青混凝土要看性质及制备工艺
来源：/ 日期：2022-11-30
沥青混凝土按所用集料品种不同，可分为碎石的、砾石的、砂质的、矿渣的数类，以碎石采用为普遍。那你知道选济南沥青混凝土要看什么吗？
According to different types of aggregates used, asphalt concrete can be divided into crushed stone, gravel, sandy and slag, and crushed stone is widely used. Do you know what to look for when choosing Jinan asphalt concrete?
性质
nature
沥青混凝土材料的强度主要表现在两个方面。一是沥青与矿粉形成的胶结料的粘结力;另一是集料颗粒间的内摩阻力和锁结力。矿粉细颗粒(大多小于0.075毫米)的巨大表面积使沥青材料形成薄膜，从而提高了沥青材料的粘结强度和温度稳定性;而锁结力则主要在粗集料颗粒之间产生。
The strength of asphalt concrete materials is mainly shown in two aspects. One is the cohesive force of the binder formed by asphalt and mineral powder; The other is the internal friction and locking force between aggregate particles. The huge surface area of fine mineral powder particles (mostly less than 0.075mm) makes asphalt material form a film, thus improving the adhesive strength and temperature stability of asphalt material; The locking force is mainly generated between coarse aggregate particles.
选择沥青混凝土矿料级配时要兼顾两者，以达到加入适量沥青后混合料能形成密实、稳定、粗糙度适宜、经久耐用的路面。配合矿料有多种方法，可以用公式计算，也可以凭经验规定级配范围。沥青混凝土材料中的沥青适宜用量，应以试验室试验结果和工地实用情况来确定，一般在有关规范内均列有可资参考的沥青用量范围作为试配的指导。
The mineral aggregate gradation of asphalt concrete shall be selected in consideration of both, so that the mixture can form a dense, stable, suitable roughness and durable pavement after adding an appropriate amount of asphalt. There are many methods for mixed mineral aggregate, which can be calculated by formula or the grading range can be specified by experience. The appropriate amount of asphalt in asphalt concrete materials shall be determined based on the laboratory test results and the practical situation of the construction site. Generally, the range of asphalt amount that can be referenced is listed in the relevant specifications as the guide for trial mixing.
制备工艺
Preparation process
热拌的沥青混凝土材料宜在集中地点用机械拌制。一般选用固定式热拌厂，在线路较长时宜选用移动式热拌机。冷拌的沥青混凝土材料可以集中拌和，也可就地路拌。
Hot mixed asphalt concrete materials should be mixed mechanically at centralized locations. Generally, fixed hot mixing plants are selected, and mobile hot mixing machines should be selected when the line is long. Cold mixed asphalt concrete materials can be mixed in a centralized way or mixed on the road.
在制备工艺上，过去多采用先将砂石料烘干加热后，再与热沥青和冷的矿粉拌和。又发展一种先用热沥青拌好湿集料，然后再加热拌匀的方法，以因集料在加热和烘干时飞灰。
In terms of preparation technology, in the past, the sand and gravel materials were dried and heated before being mixed with hot asphalt and cold mineral powder. A method of mixing wet aggregate with hot asphalt first, and then heating and mixing is developed to eliminate fly ash caused by heating and drying of aggregate.
采用后一种工艺时，要防止残留在混合料中的水分影响沥青混凝土使用寿命，好能同时采用沥青抗剥落剂，以增强抗水能力。
When using the latter process, it is necessary to prevent the residual moisture in the mixture from affecting the service life of asphalt concrete, so that asphalt anti stripping agent can be used at the same time to enhance the water resistance.
The above is the answer to the question that the selection of asphalt concrete depends on its properties and preparation process. If you have any questions about this, you can come to our website at any time Consult and explain more matters to you!
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