Cement stabilized macadam mixture and preparation process thereof

Abstract

The invention discloses a cement stabilized macadam mixture which comprises the following components in parts by weight: 72-92 parts of aggregate and 8-28 parts of mortar; the aggregate comprises coarse aggregate and fine aggregate, wherein the coarse aggregate accounts for 15-40% of the total mass of the aggregate, and the fine aggregate accounts for 60-85% of the total mass of the aggregate; the particle size range of the coarse aggregate is 4-9 mm, and the particle size range of the fine aggregate is 0-4 mm; the mortar comprises water and a cementing material, wherein the water accounts for 15%-35% of the total mass of the mortar, and the cementing material accounts for 65%-85% of the total mass of the mortar; and the cementing material is Portland cement. According to the invention, the crushed stones with different particle sizes are added, so that the shrinkage coefficient is reduced; the crushed stones can be in close and maximum-area contact to the greatest extent to form the tightest skeleton structure, so that the durability of the pavement structure is improved, and the service life of the pavement is prolonged; the economic benefit, the social benefit and the environmental benefit are remarkable; waste materials such as slag and coal cinder are used for manufacturing, so that environmental pollution pressure is relieved, sustainable development is achieved, and the construction cost is reduced.

Description

technical field [0001] The invention relates to the technical field of roadbed materials, in particular to a cement-stabilized gravel mixture and a preparation process thereof. Background technique [0002] Cement-stabilized crushed stone refers to a certain grade of crushed stone mixed with a sufficient amount of cement and water, and the mixture obtained after mixing is obtained after compaction and curing. [0003] More than 90% of the active asphalt pavements in my country are cement-stabilized macadam base pavement structure. The advantage of this pavement structure is that the cement-stabilized macadam material has high rigidity and good plate performance, but the cement-stabilized macadam is easy to produce Drying shrinkage, weak bending and tensile strength, not enough to resist its shrinkage deformation, will produce shrinkage cracks, the overall structural strength will be greatly reduced, and the entire road will be damaged; the existing cement stabilized gravel mo...

AI Technical Summary

Problems solved by technology

[0003] More than 90% of the active asphalt pavements in my country are cement-stabilized macadam base pavement structure. The advantage of this pavement structure is that the cement-stabilized macadam material has high rigidity and good plate performance, but the cement-stabilized macadam is easy to produce Drying shrinkage, weak bending and tensile strength, not enough to resist its shrinkage deformation, will produce shrinkage cracks, the overall structural strength will be greatly reduced, and the entire road will be damaged; the existing cement stabilized gravel mostly uses expensive crushed stone Stone to make, expensive

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