New and old pavement base splicing interface treatment material and preparation method thereof

Abstract

The invention discloses a new and old pavement base splicing interface treatment material, belongs to the field of road engineering, and aims to provide a new and old pavement base splicing interfacetreatment material for highway reconstruction and extension engineering. The new and old pavement base splicing interface treatment material comprises, by weight, 50-100 parts of an organic silicon modified polyurethane emulsion, 1-3 parts of organic modified rectorite, 100-200 parts of cement, 0.5-1.5 parts of a water reducer, 20-50 parts of water and 0.5-2.5 parts of a composite retarder. The new and old pavement base splicing interface treatment material is used for solving the problems of existing base splicing interface materials, and has the advantages of simple preparation process, stable performances, high bonding strength and good splicing effect.

Description

technical field [0001] The invention relates to the field of road engineering, in particular to a treatment material for splicing interfaces of old and new pavement bases in expressway reconstruction and extension projects. Background technique [0002] In the expressway reconstruction and expansion project, due to the long travel time of the original road surface, the roadbed consolidation is relatively complete, while the expanded road surface belongs to the new pavement structure, and there is obvious settlement after construction, which will cause uneven settlement of the old and new road surfaces, resulting in damage to the pavement structure. Therefore, effective pavement splicing can avoid or delay the adverse impact on the expansion project due to settlement. However, engineering experience shows that there are two key factors affecting the splicing effect of cement-stabilized macadam bases: one is the bonding effect of the vertical interface of the old and new cemen...

AI Technical Summary

Problems solved by technology

Due to the complexity of the expansion project, the base paving time is affected by multiple factors such as mixture production, transportation, and paving equipment, and the paving time is difficult to guarantee. As a result, the new base is paved after the interface treatment materials are cured, resulting in bonding of the old and new bases. The effect is poor, which affects the integrity of the highway base after widening

[0005] The bonding strength of the cement paste to the concrete interface is small, resulting in an unsatisfactory splicing effect of the cement-stabilized gravel base of the new and old pavements; during the freeze-thaw process, the asphaltene of the emulsified asphalt will leak out, affecting the splicing joints. The bonding condition and strength

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