Full-granularity steel slag pavement base material for heavy-duty pavement

Abstract

The invention discloses a full-granularity steel slag pavement base material for a heavy-load pavement The full-granularity steel slag pavement base material is prepared by adding water into a dry material and uniformly mixing, and the dry material comprises 3.4-5.0% of a cementing material and 95.0-96.6% of steel slag aggregate; the cementing material is prepared by mixing 70-90% by mass of cement and 10-30% by mass of steel slag micro-powder according to a certain ratio; and the water accounts for 5-6% of the total mass of the dry material. Excellent physical properties and potential gellingactivity of the steel slag are utilized, the base material with high strength, small cement dosage and reduced dryness can be prepared without additives, the base material is suitable for the heavy-load pavement, and the service life of the heavy-load pavement is prolonged; and an application of the full-granularity steel slag in the base material is realized, natural resources are effectively saved, the problems of environmental pollution and the like caused by improper treatment of the steel slag are reduced, the production cost is reduced, and remarkable social, economic and environmentalbenefits are achieved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a full-grain steel slag pavement base material for heavy-duty pavement. Background technique [0002] In the asphalt pavement structure, the base layer mainly bears the road load and transmits the force evenly to the subgrade, and the surface layer mainly functions as anti-slip, wear-resistant, waterproof, and ensuring driving safety. The survey shows that many pavements in our country are in the environment of heavy traffic at present, and such pavements often have serious early damage phenomena soon, and these damages are closely related to the performance of the base material. The heavy-duty pavement has high traffic volume and heavy load, so it has higher requirements on the strength and shrinkage performance of the base material. In addition, whether it is the pavement surface layer or the base layer, a large amount of stone materials are consumed, and most of th...

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Problems solved by technology

Chinese patent CN105948639A "a high-strength and low-shrinkage anti-crack pavement base material" proposed a base material prepared from cement, steel slag sand, fine-grained soil, admixture system and water, although a base material with high strength and low dry shrinkage was obtained , but the utilization rate of steel slag is low, and the admixture with more complex composition is used; CN102491703A " a kind of steel slag water-stabilized base material" proposes a water-stabilized base material prepared by adding water to cement, steel slag aggregate, and admixture system, Although steel slag is used for the aggregate, the amount of cement used is 4% to 6%, which is high, and the addition of retarding crack inhibitor is used, which increases the cost. In addition, the particle size range of steel slag used is also small, 0.5 ~20mm, no steel slag powder

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