Cement stabilized macadam base and construction method thereof

Abstract

The invention discloses a cement stabilized macadam base and a construction method thereof, and belongs to the technical field of highway pavement pavements. The cement stabilized macadam base comprises aggregate, cement, water, a polymer mixture, magnetized polyvinyl alcohol fibers and serpentine asbestos powder; and the base is prepared by mixing and constructing the following components, by mass, 4.5% of the cement, 4.5% of the water, 0.3-0.97% of the polymer mixture, 0.6-3% of the magnetized polyvinyl alcohol fibers, 1.5% of the serpentine asbestos powder, and the balance of the aggregate.In the present invention, through mutual cooperation of the designed polymer mixture, the magnetized polyvinyl alcohol fibers, the aggregate and the serpentine asbestos powder, the water resistance is improved, the tensile strength of the cement stabilized macadam base can be effectively enhanced, the influence of temperature, humidity and the reaction effect exerted by a running vehicle due to the friction effect on the base can be weakened to a certain extent, cracking is avoided, the drawing effect of external force can be continuously resisted after cracking within a certain extent range,and the cracking speed of the base is effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of expressway pavement paving, in particular to a cement-stabilized gravel base and a construction method thereof. Background technique [0002] Cement-stabilized macadam works: Cement-stabilized macadam uses graded macadam as aggregate, uses a certain amount of cementitious material and sufficient mortar volume to fill the gaps in the aggregate, and paves and compacts according to the principle of embedded extrusion. Its compaction is close to compactness, and its strength mainly depends on the principle of interlocking and locking between crushed stones, and at the same time, there is enough mortar volume to fill the voids of aggregates. Its initial strength is high, and its strength increases with age and quickly forms a board, so it has higher strength, better impermeability and frost resistance. Cement-stabilized gravel cement dosage is generally 3% to 6% of the mixture, and the 7-day unconfined compre...

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Problems solved by technology

[0004] The purpose of the present invention is: in order to solve the problem that the tensile strength of the base layer cannot be enhanced, the base layer is easily deformed when it is subjected to temperature, humidity and the friction of the vehicle being driven, and cracks will also occur when it is serious, and after the cracking of the base layer occurs, Unable to slow down the problem of continued cracking speed, a cement-stabilized gravel base and its construction method are proposed