A cement mortar, its preparation method and application

By compounding modified mesoporous zeolite powder and natural asphalt powder, the construction performance and volume stability of CRTSⅢ type track slab sealing mortar were solved, the interfacial adhesion and durability of the mortar were improved, and the service performance of the track slab was ensured.

CN118084435BActive Publication Date: 2026-07-17BEIJING RAILWELD NEW MATERIAL TECH CO LTD +4
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING RAILWELD NEW MATERIAL TECH CO LTD
Filing Date
2024-02-27
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

The existing sealing mortar has insufficient construction performance and volume stability in CRTSⅢ type track slabs, which can easily lead to corrosion of prestressed steel bars and affect the service life of the track slabs.

Method used

The compounding of components such as modified mesoporous zeolite powder, cationic surfactant-treated natural asphalt powder, dispersible latex powder, water-reducing agent, expanding agent, plasticizer, early strength agent and retarder improves the workability, density and volume stability of mortar, and enhances interfacial adhesion and impermeability.

Benefits of technology

It achieves simple construction, good interface adhesion, high shrinkage and volume stability after hardening, and excellent resistance to seepage, freezing and fatigue, thus extending the service life of the track slab.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention discloses a cement mortar comprising water and solid raw materials, wherein the solid raw materials constitute 100% by mass and the water comprises 10%-20% by mass. The solid raw materials consist of the following components in parts by mass: 400-600 parts cement, 400-600 parts fine aggregate, 5-45 parts modified mesoporous zeolite powder, 5-20 parts cationic surfactant-treated natural asphalt powder, 3-15 parts dispersible latex powder, 0.4-8 parts water-reducing agent, 0.3-6 parts expanding agent, 0.1-1.2 parts plasticizer, 0.1-1.5 parts early-strength agent, and 0.3-10 parts retarder. The modified mesoporous zeolite powder is prepared by modifying ZSM-5 zeolite. This invention also provides a method for preparing the cement mortar and its application as an anchoring mortar in sealing anchor holes in concrete track slabs.
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