Bridge deck pavement block, bridge paved by same and manufacturing method of bridge deck pavement block

Abstract

The invention discloses a bridge deck pavement block, a bridge paved by the same and a manufacturing method of the bridge deck pavement block. The bridge deck pavement block comprises a pavement block body which is composed of composite rubber concrete or rubber asphalt concrete. Compared with the prior art, the bridge deck pavement block has the advantages that the pavement block body made by the composite rubber concrete or the rubber asphalt concrete is adopted, so that mechanical performance, high-temperature stability, water stability, low-temperature cracking resistance, anti-aging performance and deforming resistance are all improved substantially compared with conventional bridge deck pavement structures, the bridge deck pavement block is light in weight, long in service life and resistant to fatigue and cracking, the problem that current bridge deck pavement structures are prone to various problems like sliding, pushing, cracking, pitting, rutting and bumping, and the bridge deck pavement block is suitable for pavement of various hard bridge decks; the pavement block body is prepared by compositing reclaimed rubber and stone, so that the bridge deck pavement block is low in cost, high in elasticity and excellent in damping performance.

Description

technical field [0001] The invention relates to a bridge deck paving block and a processing method of the paving block, and also relates to a bridge covered with the paving block. Background technique [0002] Steel bridges are beneficial to reduce dead loads and give full play to the characteristics of space structures, and are the preferred structural form of long-span bridges. However, the characteristics of steel bridge decks such as smoothness, flexibility, large local deformation, complex dynamic characteristics, and small heat capacity all put forward strict requirements for bridge deck pavement. Existing steel bridge deck pavements, regardless of cast asphalt concrete (GA), asphalt mastic concrete (MA), modified asphalt (SMA), epoxy resin asphalt (EA), all have premature high-temperature rutting, lateral movement, and cracking These diseases are not only related to the unfavorable use conditions of steel bridge deck pavement, but also directly related to the traffic ...

AI Technical Summary

Problems solved by technology

Steel bridge deck pavement structures mainly fall into the following four categories: ①The cast asphalt concrete GA (Guss Asphalt) structure represented by Germany and Japan. +30mm modified dense graded asphalt concrete; asphalt mastic concrete MA (Mstic Asphalt) structure represented by the UK (actually also cast asphalt concrete, but the pavement thickness and process are different from those in Japan), generally 38mm The main disadvantages of pouring asphalt concrete are: poor high temperature stability, easy to form ruts; construction requires a series of special equipment, and the construction organization is relatively complicated; the temperature of the mixture during construction is very high, reaching above 240 ° C, and the impact on the bridge cannot be ignored

; ② The modified asphalt SMA structure (Stone Mastic Asphalt) recently adopted in Germany, Japan and other countries. The application effect of modified asphalt SMA in steel bridge pavement is not satisfactory. Soon after the pavement is opened, rutting, partial wrapping, shifting, oil flooding, and local fatigue cracks will appear in different degrees; After long-term use, the deck pavement of some bridges has been severely damaged, and various forms of damage have appeared

Due to the poor crack resistance of SMA materials using SBS asphalt, cracking is one of the most common diseases of double-layer SMA pavement, and bridge decks will also have rutting, potholes, passing and other diseases

③Epoxy asphalt EA (Epoxy asphalt) concrete structure represented by the United States, with a total thickness of 32-76mm epoxy asphalt concrete (EA), the main disadvantages are: the price of epoxy asphalt is relatively high, and most of the key technologies are controlled by large foreign companies ; The preparation process of epoxy asphalt mixture is relatively complicated; the construction of epoxy asphalt mixture has strict requirements on time and temperature, harsh requirements on construction environment, and difficult construction

It can be seen that the use of asphalt pavement on the bridge deck of long-span steel bridges in my country is not ideal, and there is still a lack of successful experience in steel bridge deck pavement in China

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