Sample preparation method for fusion test of emulsified asphalt and old asphalt

Abstract

The invention relates to a sample preparation method for fusion test of emulsified asphalt and old asphalt, belongs to the technical field of asphalt pavement regeneration, and aims to solve the problem that a fused sample of emulsified asphalt and old asphalt is difficult to prepare. The method comprises the following steps that: aged asphalt is prepared to replace old asphalt according to specifications, the aged asphalt, emulsified asphalt and sodium hydroxide powder are sequentially poured into a silica gel mold, and the mass of the silica gel mold, obtained after each material is added, is weighed; the mass of the silica gel mold containing the fused sample is weighed at different heat preservation time nodes, the moisture mass loss in different time periods is calculated according to a formula, and when the mass loss is not larger than 0.8%, the corresponding heat preservation time is the time needed for effectively removing the moisture in the emulsified asphalt; and finally, the silica gel mold containing the fused sample is putted into a 0 DEG C high-low temperature test box, still standing is performed for 10 minutes, then demolding is performed, and the fused sample is cut and researched according to the size requirement of a microscopic test detection sample. The method is of great significance to application and popularization of the asphalt pavement cold recycling technology.

Description

technical field [0001] The invention relates to a sample preparation method for a fusion test of emulsified asphalt and old asphalt, and belongs to the technical field of asphalt pavement regeneration. Background technique [0002] In recent years, my country's highway construction has developed rapidly. As of the end of 2020, the total mileage of national expressways has reached 161,000 kilometers. The design life of asphalt pavement on high-grade highways is 15 years, but practice shows that after operation, many asphalt concrete pavements will enter a period of large-scale maintenance or renovation after 3 to 5 years as short as 6 to 9 years as long as long. In the process of asphalt pavement maintenance, renovation and upgrading, the waste of old asphalt pavement material resources is serious, and the environmental pollution caused by it is also intensifying. Asphalt pavement regeneration technology enables the reuse of waste asphalt mixture, saves a lot of asphalt and ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a sample preparation method for the fusion test of emulsified asphalt and old asphalt, in order to solve the problem that it is difficult to prepare the fusion sample of emulsified asphalt and old asphalt in the field of asphalt pavement cold recycling technology, and to reveal the fusion of emulsified asphalt and old asphalt. The blending mechanism of asphalt and the promotion and application of asphalt pavement cold recycling maintenance technology lay a foundation