沥青混合料的配合比设计，核心就两件事：定级配、定油石比。油石比差0.3%，路面寿命可能差好几年。马歇尔试验至今仍是行业“金标准”。

The core of asphalt mixture mix design lies in two things: grading and proportioning, and determining the asphalt to aggregate ratio. The difference in oil stone ratio is 0.3%, and the lifespan of the road surface may be several years worse. The Marshall test is still the industry's "gold standard" to this day.

配合比设计分三阶段。 目标配合比设计——选矿料、定级配、找非常佳油石比。生产配合比设计——按目标配合比调拌合站各热料仓比例。生产配合比验证——试拌试铺，验证设计结果。

The mix design is divided into three stages. Target mix design - beneficiation material, grading and matching, finding the best oil stone ratio. Production mix proportion design - adjust the proportion of each hot material bin in the mixing station according to the target mix proportion. Production mix ratio verification - trial mixing and trial paving to verify the design results.

原材料有硬指标。 粗集料用碱性石料（玄武岩或石灰岩），洛杉矶磨耗值≤28%，针片状<12%。细集料宜用机制砂。矿粉建议干燥洁净，拌和机回收粉严禁使用。沥青上面层用A级70号。

Raw materials have hard indicators. Coarse aggregate is made of alkaline stone material (basalt or limestone), with a Los Angeles abrasion value of ≤ 28% and a needle like value of<12%. Fine aggregate should be made of machine-made sand. Mineral powder must be dry and clean, and the use of recycled powder from the mixer is strictly prohibited. The upper layer of asphalt shall be grade A 70.

非常佳油石比怎么定？ 取目标油石比及±0.3%三组做马歇尔试验。三组都合格取中值；有不合格的重新调整。空隙率、稳定度、流值、饱和度都要达标。

How to determine the optimal oil stone ratio? Take three groups of target oil stone ratio and ± 0.3% for Marshall test. Take the median value if all three groups are qualified; There are unqualified readjustments. The porosity, stability, flow rate, and saturation must all meet the standards.

关键提醒： 油石比是影响空隙率、沥青饱和度的唯一因素。油石比偏大路面泛油、车辙；偏小则空隙率大、水损害、松散。

Key reminder: Oil stone ratio is the only factor affecting porosity and asphalt saturation. Oil stone ratio tends to overflow and ruts on the main road surface; If it is too small, it will result in a high porosity, water damage, and looseness.

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