Environment-friendly composite additive modified cement stabilized macadam mixture and preparation method thereof

Abstract

The invention discloses an environment-friendly composite additive modified cement stabilized macadam mixture. The environment-friendly composite additive modified cement stabilized macadam mixture is prepared from the following raw materials in parts by weight: 75 to 90 parts of macadam, 0.3 to 1.5 parts of modified rubber powder, 0.3 to 1.0 part of nano graphene microchip, 3 to 8 parts of cement, 0.02 to 0.10 part of retarder, 9 to 16 parts of ceramic fragment, 0.3 to 2.2 parts of coconut fiber and 0.5 to 1.9 parts of salix mongolica fiber. The addition amount of the water accounts for 4.2-6.5% of the mass of the dry materials. The environment-friendly composite additive modified cement stabilized macadam mixture has the advantages of excellent pavement performance, simple preparation process and non-toxic and harmless raw materials, can improve the anti-freezing property and dry shrinkage property of a road base, and plays a significant role in prolonging the service life of an asphalt pavement; the environment-friendly composite additive modified cement stabilized macadam mixture is environment-friendly, low-carbon, wide in raw material source, free of pollution in the production process, low in price and low in cost, and has good economic and social benefits.

Description

technical field [0001] The invention relates to the technical field of road engineering materials, in particular to an environment-friendly composite admixture modified cement-stabilized gravel mixture and a preparation method thereof. Background technique [0002] With the development of the transportation industry, it also drives the development of the automobile industry, and the overloading phenomenon faced by roads is also becoming more and more serious. At present, my country's road construction is mainly based on cement-stabilized macadam semi-rigid bases, and usually a large number of cracks will appear within a few years after opening to traffic. The semi-rigid base has its own advantages, including good integrity and simple construction technology, but the ordinary cement-stabilized crushed stone semi-rigid base is very prone to shrinkage cracks. [0003] For this reason, people add rubber powder to it to improve its performance. However, in the actual constructio...

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Problems solved by technology

[0005] The purpose of the present invention is to provide an environmentally friendly composite admixture modified cement stabilized gravel mixture and its preparation method, aiming to solve the technical problems of insufficient road performance and short service life of the existing cement stabilized gravel mixture