Method for mix design of hot-mix asphalt mixture produced with intermittent mixer

Abstract

The invention relates to a method for mix design of a hot-mix asphalt mixture produced with an intermittent mixer and is characterized in that: the process mix design method comprises the following steps of: mineral mix design, Marshall test, determination of optimal asphalt dosage or oil-stone ratio, mix design test, correction of optimal asphalt dosage or oil-stone ratio and determination of final process mixing proportions of minerals. The step of mineral mix design comprises the procedures of determining initial proportions and designing mineral mixing proportions. The mix design method provided by the invention maintains consistency between process mix design and target mix design, and achieves quantization and visualization of the comparison between process mix design and target mix design. The mix design method effectively prevents the problem of material overflow, reduces loss, increases the running efficiency of equipment, reduces the consumptions of asphalt and mineral powder, ensures the construction quality and reduces the construction cost.

Description

technical field [0001] The invention belongs to the technical field of road asphalt mixture, and specifically refers to a method for designing the mixing ratio of hot-mix asphalt mixture produced by a batch mixer. Background technique [0002] At present, hot mix asphalt mixture (HMA) is suitable for asphalt pavement of various grades of roads. Two types of asphalt mixing equipment are usually used in the method of hot mix asphalt mixture production, one is a batch mixer and the other is a continuous mixer. Because the types of materials used in my country are relatively complex and highly variable, and most of the mixing plants are open-air stockyards, and the moisture content of materials is greatly affected by the weather. The asphalt mixing equipment currently used is a batch mixer. [0003] One of the core technologies in the current industry standard ("Technical Specifications for Highway Asphalt Pavement Construction" JTG F40-2004) is the design of the mix ratio for ...

AI Technical Summary

Problems solved by technology

In actual production, the sieving ability of the sieve is often affected by the changes of various factors (such as the gradation of the mixture, the type and type of the aggregate, the cleanliness of the aggregate, the sieve hole, the inclination angle of the sieve and the vibration force, etc.) influence), and the goal of equivalent screening capacity cannot be achieved (the vibrating screen used for the hot material screening of the batch mixer and the screen used for aggregate production correspond to the same specification screen), and the mixing ratio design effect of the hot mix asphalt mixture not ideal

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