What is the lowest temperature for paving asphalt concrete?

The paving temperature of asphalt concrete needs to be determined according to the variety and model of asphalt concrete being paved. The common No.70 asphalt concrete is: normal construction: 135℃, low temperature construction: 160℃.

Asphalt concrete, commonly known as asphalt concrete, is a mixture made of mineral aggregate, crushed stone or gravel, stone chips or sand and mineral powder with certain gradation composition. Under strictly controlled conditions, it is mixed with a certain proportion of road asphalt materials.

According to the different types of aggregates used, the extended data can be divided into several categories: gravel, gravel, sand and slag, of which gravel is the most common. According to the maximum particle size of the mixture, it can be divided into coarse particles (below 35 ~ 40mm), medium particles (below 20 ~ 25mm), fine particles (below 10 ~ 15mm) and sand particles (below 5 ~ 7mm).

According to the different gradation of mineral aggregate, it can be divided into dense gradation, semi-open gradation and open gradation, and open gradation mixture is also called asphalt macadam. Among them, hot mix and hot spread dense graded macadam mixture is durable, high strength and good integrity, which is a representative material for building high-grade asphalt pavement and is widely used.

According to the mineral composition, it can be divided into dense-suspension structure (such as AC-ⅰ), skeleton-void structure (such as OGFC) and dense-skeleton structure (such as SMA).

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