MS-6型微表处集料级配范围及最佳沥青用量范围

Aggregate gradation design for MS -6 mixes and determination of optimun bitumen emulsion content

探讨了用双层稀浆混合料填补20 mm左右较深车辙时自身很容易产生车辙的原因,阐述了开发集料最大粒径为20mm的MS-6型超粗稀浆混合料的必要性。发现稀浆工艺与热拌热铺工艺不同,它不但要求集料级配能使微表处的密实度达到最大,而且首先要求的是集料级配能使稀浆混合料的和易性达到最佳。因此,总结提出了最佳和易性级配曲线理论、集料颗粒排列理论和反粒子干涉理论,并在此基础上结合最大密实度级配曲线理论确定了MS-6型微表处集料级配范围以及最佳沥青用量范围。

This article deals with the problem that ruts are easily caused while the old ruts at 20mm deepth are being filled with two - layer slurry mixture, it is anxious to develop a MS -6 Course slurry mixture containing the aggregate grains of maximum diameter of 20mm. It is found that, different from hot - mix - hot -laid technology, slurry technology requires not only the aggregate gradation enable the slurry mixture to obtain optimum workability, but also enable aggregate gradation of micro - surfacing to obtain maximum density. The author found and put forward the theory of optimum workability grading curve, the arrangement of aggregate grains, and theory of anti - particle interference ; From maximum density grading curve, the author specifies the grading range of MS -6 aggregate grains and optimum asphalt emulsion content.