Self-leveling waterproof mortar as well as preparation method and application thereof

Abstract

The invention provides self-leveling waterproof mortar. The self-leveling waterproof mortar has the characteristics of high mobility, compact structure, water resistance, excellent durability and thelike. The self-leveling waterproof mortar is prepared from the following components in parts by mass: 20 to 30 parts of cement, 2 to 10 parts of a mineral admixture, 40 to 60 parts of sand, 5 to 15 parts of mineral filler, 0.05 to 0.3 part of a water reduction agent, 0.002 to 0.015 part of a defoaming agent, 0.002 to 0.06 part of a stabilizer, 1 to 5 parts of polymer emulsion, 0.1 to 0.3 part of waterborne epoxy resin emulsion, 0.1 to 0.3 part of a curing agent, and 4 to 10 parts of water. The invention also provides a preparation method of the self-leveling waterproof mortar and application thereof in an inter-line waterproof system of a railway concrete bridge deck.

Description

technical field [0001] The invention relates to the technical field of waterproof building materials, in particular to a self-leveling waterproof mortar with high fluidity, compact structure, waterproof and excellent durability, and a preparation method and application thereof. Background technique [0002] The deck waterproofing system of railway concrete bridges is an important technical means to improve the durability of bridge structures. If the existing bridge deck fails due to deck waterproofing, it will cause water seepage and corrosion of steel bars on the bridge deck, which will directly affect the service life of the bridge and the driving safety of the train. [0003] The line-to-line waterproof system of my country's railway concrete bridge deck (that is, the waterproof system between the up and down rails on the bridge deck) adopts a waterproof membrane layer firstly, and then pours a certain thickness (about 10cm) of concrete as a protective layer. At present,...

AI Technical Summary

Problems solved by technology

This not only affects the safety of driving, but also does not have a waterproof effect on the substructure, resulting in water leakage in the bridge, corrosion and loosening of the piers and abutments, and instability of the piers and abutments.

The possible reasons for the analysis are as follows: (1) After the construction of the concrete protective layer, there is no maintenance in place, causing microcracks during the initial curing, and after a period of operation, diseases such as pulverization appear; (2) the concrete components of the protective layer Fiber, although it has the advantages of anti-deformation and crack resistance, but the low temperature in winter in Northeast China is long, and there are many freeze-thaw cycles under the winter snow cover. The interface formed by the fiber forms a new water channel, which increases the freeze-thaw damage.

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