行業(yè)資訊
瀝青砼到底是什么材料？
來(lái)源：http://m.shyy66.com/ 日期：2023-02-22
濟(jì)南瀝青砼俗稱瀝青混凝土，經(jīng)人工選配具有一定級(jí)配組成的礦料（碎石或軋碎礫石、石屑或砂、礦粉等）與一定比例的路用瀝青材料，在嚴(yán)格控制條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.
瀝青砼按所用結(jié)合料不同，可分為石油瀝青的和煤瀝青的兩大類；有些國(guó)家或地區(qū)亦有采用或摻用天然瀝青拌制的。
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.
按所用集料品種不同，可分為碎石的、礫石的、砂質(zhì)的、礦渣的數(shù)類，以碎石采用為普遍。
According to different types of aggregate used, it can be divided into gravel, gravel, sandy and slag, and gravel is the most widely used.
按混合料大顆粒尺寸不同,可分為粗粒(35～40毫米以下)、中粒（20～25毫米以下）、細(xì)粒(10～15毫米以下)、砂粒(5～7毫米以下)等數(shù)類。
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).
按混合料的密實(shí)程度不同，可分為密級(jí)配、半開級(jí)配和開級(jí)配和間斷級(jí)配。其中熱拌熱鋪的密級(jí)配碎石混合料經(jīng)久耐用，強(qiáng)度高，整體性好，是修筑高級(jí)瀝青路面的代表性材料，應(yīng)用得廣。
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.
各國(guó)對(duì)瀝青混凝土制訂有不同的規(guī)范，國(guó)內(nèi)制定的熱拌熱鋪瀝青混合料技術(shù)規(guī)范，以空隙率10%及以下者稱為瀝青混凝土，又細(xì)分為Ⅰ型和Ⅱ型，Ⅰ型的孔隙率為3～6%（行人道路2%-6%）；Ⅱ型為4～10%；空隙率10%以上者為半開級(jí)配，代表類型有瀝青穩(wěn)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;
壓實(shí)后孔隙率為15%以上為開級(jí)配型，代表類型有瀝青磨耗層混合料；對(duì)于間斷級(jí)配瀝青混合料，指級(jí)配中缺少一個(gè)或者幾個(gè)檔次而形成的級(jí)配間斷的混合料，代表類型有瀝青馬蹄脂碎石（SMA）。瀝青混凝土物理力學(xué)指標(biāo)有穩(wěn)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.
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