Polypropylene fiber lime-fly ash aggregate base material and preparation method thereof

Abstract

The invention polypropylene fiber lime fly-ash broken stone base course and a method for preparing the same and relates to the technical field of road semi-rigid base course modification. The preparation method is as follows: polypropylene fiber is per-dispersed in lime and fly-ash, and then is mixed with aggregate and water to form the polypropylene fiber lime fly-ash broken stone base course. Compared with the prior lime fly-ash broken stone base course, the polypropylene fiber lime fly-ash broken stone base course has the advantages of higher cracking resistance, bending strength, indirect pull strength and water stability and smaller temperature shrinkage and dry shrinkage.

Description

technical field

[0001] The invention relates to the technical field of improving road semi-rigid base materials, and aims at inventing a polypropylene fiber fly ash gravel base material. Background technique

[0002] At present, the cracking problem of semi-rigid base has attracted extensive attention from domestic and foreign engineering circles. Many improvement measures have been put forward for the problem of cracking at the grassroots level, and certain results have been achieved.

[0003] The specific measures mainly focus on the following aspects:

[0004] ① Design for pavement structure;

[0005] ② For the base material itself;

[0006] ③ For the setting and construction process between the semi-rigid base and asphalt surface;

[0007] ④ For the asphalt pavement material itself.

[0008] Starting from the base material itself, it is possible to reduce its shrinkage coefficient as much as possible and improve Its strength increases the cracking resistance of the...

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