行业资讯
沥青砼到底是什么材料？
来源：/ 日期：2023-02-22
济南沥青砼俗称沥青混凝土，经人工选配具有一定级配组成的矿料（碎石或轧碎砾石、石屑或砂、矿粉等）与一定比例的路用沥青材料，在严格控制条件下拌制而成的混合料。
Jinan asphalt concrete, commonly known as asphalt concrete, is a mixture of manually selected mineral aggregate (crushed stone or crushed gravel, stone chips or sand, mineral powder, etc.) with a certain proportion of road asphalt materials under strict control.
沥青砼按所用结合料不同，可分为石油沥青的和煤沥青的两大类；有些或地区亦有采用或掺用天然沥青拌制的。
Asphalt concrete can be divided into petroleum asphalt and coal asphalt according to different binders; Some countries or regions also use or mix natural asphalt.
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。
According to different types of aggregate used, it can be divided into gravel, gravel, sandy and slag, and gravel is the most widely used.
按混合料大颗粒尺寸不同,可分为粗粒(35～40毫米以下)、中粒（20～25毫米以下）、细粒(10～15毫米以下)、砂粒(5～7毫米以下)等数类。
According to the size of the large particles of the mixture, it can be divided into coarse particles (less than 35-40 mm), medium particles (less than 20-25 mm), fine particles (less than 10-15 mm), and sand particles (less than 5-7 mm).
按混合料的密实程度不同，可分为密级配、半开级配和开级配和间断级配。其中热拌热铺的密级配碎石混合料经久耐用，强度高，整体性好，是修筑沥青路面的代表性材料，应用得广。
According to the different compactness of the mixture, it can be divided into dense grading, semi-open grading, open grading and discontinuous grading. Among them, the hot-mixed and hot-paved dense graded crushed stone mixture is durable, high strength and good integrity. It is a representative material for building high-grade asphalt pavement and widely used.
各国对沥青混凝土制订有不同的规范，国内制定的热拌热铺沥青混合料技术规范，以空隙率10%及以下者称为沥青混凝土，又细分为Ⅰ型和Ⅱ型，Ⅰ型的孔隙率为3～6%（行人道路2%-6%）；Ⅱ型为4～10%；空隙率10%以上者为半开级配，代表类型有沥青稳定碎石；
Different countries have different specifications for asphalt concrete. The technical specifications for hot-mix and hot-laid asphalt mixture formulated in China are called asphalt concrete with a void ratio of 10% or less, and are subdivided into Type I and Type II, with a void ratio of 3~6% (2% - 6% for pedestrian roads); Type II is 4~10%; Those with a void ratio of more than 10% are semi-open graded, and the representative type is asphalt stabilized macadam;
压实后孔隙率为15%以上为开级配型，代表类型有沥青磨耗层混合料；对于间断级配沥青混合料，指级配中缺少一个或者几个档次而形成的级配间断的混合料，代表类型有沥青马蹄脂碎石（SMA）。沥青混凝土物理力学指标有稳定度、流值和孔隙率等。
After compaction, the porosity is more than 15%, which is open-graded type, and the representative type is asphalt wearing course mixture; For discontinuous graded asphalt mixture, it refers to the mixture formed by the lack of one or several grades in the gradation, and the representative type is asphalt horseshoe macadam (SMA). The physical and mechanical indexes of asphalt concrete include stability, flow value and porosity.
The above is the relevant answer about what material asphalt concrete is. If you have any doubts or needs about it, please come to our website consulting service
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