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選瀝青混凝土要看性質(zhì)及制備工藝

來源：http://m.shyy66.com/ 日期：2022-11-30

瀝青混凝土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。那你知道選濟(jì)南瀝青混凝土要看什么嗎？

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?

性質(zhì)

nature

瀝青混凝土材料的強(qiáng)度主要表現(xiàn)在兩個(gè)方面。一是瀝青與礦粉形成的膠結(jié)料的粘結(jié)力;另一是集料顆粒間的內(nèi)摩阻力和鎖結(jié)力。礦粉細(xì)顆粒(大多小于0.075毫米)的巨大表面積使瀝青材料形成薄膜，從而提高了瀝青材料的粘結(jié)強(qiáng)度和溫度穩(wěn)定性;而鎖結(jié)力則主要在粗集料顆粒之間產(chǎn)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.

選擇瀝青混凝土礦料級配時(shí)要兼顧兩者，以達(dá)到加入適量瀝青后混合料能形成密實(shí)、穩(wěn)定、粗糙度適宜、經(jīng)久耐用的路面。配合礦料有多種方法，可以用公式計(jì)算，也可以憑經(jīng)驗(yàn)規(guī)定級配范圍。瀝青混凝土材料中的瀝青適宜用量，應(yīng)以試驗(yàn)室試驗(yàn)結(jié)果和工地實(shí)用情況來確定，一般在有關(guān)規(guī)范內(nèi)均列有可資參考的瀝青用量范圍作為試配的指導(dǎo)。

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.
濟(jì)南瀝青混凝土

制備工藝

Preparation process

熱拌的瀝青混凝土材料宜在集中地點(diǎn)用機(jī)械拌制。一般選用固定式熱拌廠，在線路較長時(shí)宜選用移動(dòng)式熱拌機(jī)。冷拌的瀝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.

在制備工藝上，過去多采用先將砂石料烘干加熱后，再與熱瀝青和冷的礦粉拌和。又發(fā)展一種先用熱瀝青拌好濕集料，然后再加熱拌勻的方法，以消除因集料在加熱和烘干時(shí)飛灰。

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.

采用后一種工藝時(shí)，要防止殘留在混合料中的水分影響瀝青混凝土使用壽命，好能同時(shí)采用瀝青抗剝落劑，以增強(qiáng)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.

以上就是關(guān)于選瀝青混凝土要看性質(zhì)及制備工藝問題的相關(guān)解答了，您對此有什么不理解的地方可以隨時(shí)來我們網(wǎng)站http://m.shyy66.com進(jìn)行咨詢，為您講解更多事項(xiàng)！

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 http://m.shyy66.com Consult and explain more matters to you!

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