Coarse aggregate reactive powder concrete bridge deck shot blasting and bottom coating waterproofing process

Abstract

The invention discloses a coarse aggregate reactive powder concrete bridge deck shot blasting and bottom coating waterproof process. The coarse aggregate reactive powder concrete bridge deck shot blasting and bottom coating waterproof process comprises the following steps: step 1, a bridge deck is preliminarily cleaned; step 2, a shot blasting machine is debugged in place; step 3, shot blasting operation is conducted; step 4, steel shot cleaning is conducted; step 5, floating ash is cleaned; and step 6, a waterproof bonding layer is constructed, wherein preliminary cleaning of the bridge deck in the first step is completed through bridge deck pavement layer shot blasting equipment, and the bridge deck pavement layer shot blasting equipment adopts equipment with the functions of synchronously removing laitance and collecting dust and shot blasting equipment which is provided with a driving walking system and achieves self-circulation recycling to conduct bridge deck concrete pavement layer treatment. According to the coarse aggregate reactive powder concrete bridge deck shot blasting and bottom coating waterproof process, the construction quality is good, hot asphalt is sprayed evenly enough, and the integrity of main bridge deck construction can be guaranteed.

Description

technical field [0001] The invention relates to the related technical field of bridge deck construction of a main bridge, in particular to a technique of shot blasting and primer waterproofing for a bridge deck of coarse aggregate active powder concrete. Background technique [0002] The bridge deck of Nanjing Fifth Bridge is designed as steel-(UHPC) reactive powder concrete, but in actual construction, due to many cementitious materials, relatively low water gel, strength up to 150MPa, and the shrinkage of concrete itself, the workability of concrete is caused. The fluidity is difficult to meet the construction requirements. After experts and tests, coarse aggregate and air-entraining agent are added to the concrete to increase the workability and fluidity of the concrete, maintain the design strength to meet the requirements of 150pma, and reduce the economic cost of the concrete itself, but After the construction, a large number of air bubbles and holes are caused. At the...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of coarse aggregate active powder concrete bridge deck shot blasting and primer waterproofing process, to solve most of the coarse aggregate active powder concrete bridge deck shot blasting and primer waterproofing process proposed in the above-mentioned background technology. The construction quality cannot be guaranteed, and the hot asphalt is not evenly distributed, and a large number of air bubbles and holes are caused after construction

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