A kind of epoxy mortar bridge deck thin-layer pavement material and its construction method

Abstract

The invention discloses an epoxy mortar bridge floor thin layer paving material and a preparation method thereof. The epoxy mortar bridge floor thin layer paving material is characterized by consisting of epoxy mortar and graded broken stones, wherein the dosage of the graded broken stones is 4-10kg / m<2>; the epoxy mortar is prepared by mixing an adhesive with quartz sand according to the mass ratio of 1:3; the moisture content of the quartz sand is less than or equal to 0.2%; the adhesive is prepared by mixing resin A and a modified amine hardener B according to the mass ratio of (1.5-2):1; the resin A comprises the following constituents in parts by weight: 50-70 parts of epoxy resin, 5-15 parts of dimer acid modified epoxide resin, 1-8 parts of a toughening agent and 20-40 parts of a diluting agent; the modified amine hardener B comprises the following constituents in parts by weight: 20-40 parts of polyether amine D230, 20-40 parts of polyether amine D400, 15-25 parts of polyether amine D2000, 1-10 parts of aminoethyl piperazine AEP and 2-6 parts of accelerant DMP-30. The epoxy mortar bridge floor thin layer paving material has the advantages that the thickness is small, the friction numerical value is high, the watertightness is high, the chemical resistance is high, and the compatibility is high.

Description

technical field [0001] The invention relates to a bridge deck pavement material, in particular to an epoxy mortar bridge deck thin-layer pavement material and a preparation method thereof. Background technique [0002] As the connection hub of transportation, the safety, durability and comfort of bridges are important projects related to the travel of people and vehicles, the transportation of goods and resources, and important infrastructure related to people's livelihood. The bridge deck pavement is a wear layer directly exposed to harsh factors such as vehicle loads, environmental temperature changes, rain erosion, sun exposure, various acid, alkali and salt erosion, and collision accidents. Its structural safety is directly related to the safety of vehicles and pedestrians. Safety of life and property. [0003] At present, the most used bridge deck pavement materials are asphalt pavement and epoxy asphalt pavement. As a mature pavement material, asphalt pavement has be...

AI Technical Summary

Problems solved by technology

As a mature pavement material, asphalt pavement has been widely used. However, engineering examples show that asphalt pavement is prone to high-temperature rutting, low-temperature cracks, shifting, and water damage in bridge decks, especially steel bridge decks. Damage, fatigue damage and other diseases, and once a disease occurs, its repair is often complicated, time-consuming and laborious

Epoxy asphalt pavement has successfully solved the above diseases, but due to its strict and difficult construction process, short operation time, high price, and unstable low temperature performance, it cannot meet the use requirements

[0004] The patent for invention with the application number 201110034932.4 "Cold-coated epoxy thin-layer bridge deck pavement material and its preparation method" introduces a cold-coated epoxy bridge deck pavement material and its construction method. The bridge deck with a large cross slope is prone to lateral flow, resulting in uneven thickness, material shortage and overflow, etc., which eventually leads to unsatisfactory laying effect

When the multi-layer structure is adopted, the accumulation of single-grade crushed stones will increase the pores, reduce the waterproof performance, and also affect the structural force; the construction time span is long, because each layer of crushed stones needs to wait after spreading The epoxy resin is cured before the construction of the next layer. When the construction of the multi-layer structure is not completed, the traffic cannot be opened, so it takes a long time to close the traffic

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