瀝青混合料的配合比設(shè)計(jì)，核心就兩件事：定級(jí)配、定油石比。油石比差0.3%，路面壽命可能差好幾年。馬歇爾試驗(yàn)至今仍是行業(yè)“金標(biāo)準(zhǔn)”。

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.

配合比設(shè)計(jì)分三階段。 目標(biāo)配合比設(shè)計(jì)——選礦料、定級(jí)配、找非常佳油石比。生產(chǎn)配合比設(shè)計(jì)——按目標(biāo)配合比調(diào)拌合站各熱料倉(cāng)比例。生產(chǎn)配合比驗(yàn)證——試拌試鋪，驗(yàn)證設(shè)計(jì)結(jié)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.

原材料有硬指標(biāo)。 粗集料用堿性石料（玄武巖或石灰?guī)r），洛杉磯磨耗值≤28%，針片狀<12%。細(xì)集料宜用機(jī)制砂。礦粉建議干燥潔凈，拌和機(jī)回收粉嚴(yán)禁使用。瀝青上面層用A級(jí)70號(hào)。

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？ 取目標(biāo)油石比及±0.3%三組做馬歇爾試驗(yàn)。三組都合格取中值；有不合格的重新調(diào)整。空隙率、穩(wěn)定度、流值、飽和度都要達(dá)標(biāo)。

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.

關(guān)鍵提醒： 油石比是影響空隙率、瀝青飽和度的唯一因素。油石比偏大路面泛油、車轍；偏小則空隙率大、水損害、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.

本文由濟(jì)南瀝青料友情奉獻(xiàn).更多有關(guān)的知識(shí)請(qǐng)點(diǎn)擊:http://m.huatts.com我們將用真誠(chéng)的態(tài)度.為您提供為多維度的服務(wù).更多有關(guān)的知識(shí)我們將會(huì)陸續(xù)向大家奉獻(xiàn).敬請(qǐng)期待.

This article is contributed by Jinan Asphalt Material Friendship For more information, please click: http://m.huatts.com We will adopt a sincere attitude To provide you with comprehensive services We will gradually contribute more relevant knowledge to everyone Coming soon.