Early-strong-fast-hard end capping anchorage mortar material for fragment-free railway plate

Abstract

The invention relates to an early strength fast hardening terminated anchor mortar material, which is characterized in that the material is formed by mixing and stirring cement, sand, porous fine sand, finely ground steel slag powder, fly ash, an early strength agent, rubber powder, silicon ash, a water reducing agent and an excitant. The parts by weight of the components are as follows: 100 parts of cement, 30-250 parts of sand, 5-25 parts of porous fine sand, 5-30 parts of finely ground steel slag powder, 10-30 parts of fly ash, 0.1-3 parts of early strength agent, 1-10 parts of rubber powder, 0-8 parts of silicon ash, 0.2-2 parts of water reducing agent and 1-5 parts of excitant. Finely ground converter slag which is naturally stored for 3-6 months is adopted for the finely ground steel slag powder and the specific surface area is 400-800m/kg; the content of magnesium oxide is 8-15%; the porous fine sand is shale ceramic sand or fly ash ceramic sand or the mixture of the shale ceramic sand and the fly ash ceramic sand based on random mixture ratio, with grain size of 0.10-2.6mm. The material provided by the invention has good mechanical property and adhesive property, low chloride ion content and shrinkage property, and high impermeability and anti-cracking performance, thereby preventing the prestressed reinforcement of track slabs from rusting.

Description

technical field [0001] The invention relates to an early-strength and quick-hardening end-sealing and anchoring mortar material for ballastless railway track slabs, which is suitable for prestressed tensioned end-sealing and anchoring of slab-type ballastless track slabs. Background technique [0002] With the enhancement of comprehensive national strength, my country's high-speed railway network construction plan will be gradually put into practice. It is expected that before 2020, my country will initially build a high-speed railway network with a speed of more than 200km / h; One of the main track structures of high-speed railway construction, it has broad application prospects in the construction of high-speed railways in my country. However, the large-scale use of track slabs in the construction of slab ballastless tracks is prefabricated, and the anchorage ends after prestressing and tensioning need to be sealed to prevent the durability of the track slabs from being redu...

AI Technical Summary

Problems solved by technology

Although there are many kinds of cement-based mortar materials on the market, they cannot be directly used as track slab sealing and anchoring materials.

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