Spike anchoring material and construction method thereof

Abstract

The invention discloses a spike anchoring material and a construction method thereof, belonging to the field of railway track building materials. The spike anchoring material comprises an anchoring roll and a modification liquid, wherein the anchoring roll is prepared from dead burnt magnesium oxide, phosphate, an admixture, fine aggregate, modified rubber powder and a thickening time control agent, and the modified rubber powder is prepared by mixing rubber powder, acidified lignocellulose, a silane coupling agent and a cross-linking agent and then carrying out microwave treatment. The anchoring force of the spike anchoring material can be larger than 60 kN at a normal temperature within 30 min and is far higher than the anchoring force of other types of spike anchoring materials under the condition of the same age; normal hydration can be realized under a low / negative temperature condition (-20 to 35 DEG C), so the use limitation of cement, resin and sulfur anchoring materials under the negative temperature condition is overcome; and the spike anchoring material is green and environment-friendly, can be taken at any time, is convenient and fast to construct and relatively low in price, and has popularization value.

Description

technical field [0001] The invention belongs to the field of railway track building materials, in particular to a spike anchoring material and a construction method thereof. Background technique [0002] At present, the anchoring materials for sleeper spikes mainly include sulfur mortar, cement mortar and organic resin materials. Among them, sulfur mortar is widely used because of its low price, fast curing speed, and good insulation performance. However, sulfur mortar has low anchoring force and large curing shrinkage. In addition, sulfur, paraffin, sand and other materials need to be mixed on site at 140- Boiled at 160°C for 2-4 hours, the quality of the material is difficult to control, and a large amount of irritating sulfur oxide smoke is produced during the boiling process, causing great environmental pollution and endangering the health of workers. It has been gradually banned in countries and regions with strict environmental protection regulations. . Cement mortar...

AI Technical Summary

Problems solved by technology

Among them, sulfur mortar is widely used because of its low price, fast curing speed, and good insulation performance. However, sulfur mortar has low anchoring force and large curing shrinkage. In addition, sulfur, paraffin, sand and other materials need to be mixed on site at 140- Boiled at 160°C for 2-4 hours, the quality of the material is difficult to control, and a large amount of irritating sulfur oxide smoke is produced during the boiling process, causing great environmental pollution and endangering the health of workers. It has been gradually banned in countries and regions with strict environmental protection regulations.

Cement mortar has poor insulation performance and slow early strength development, especially under low / negative temperature conditions, it is difficult to solidify and harden. This material can be used for spike anchoring of new lines with special insulation construction technology, but it cannot be used for existing lines. maintenance and repair

Resin anchoring materials have high requirements on the cleanliness and dryness of the interface, long curing time at low temperature, relatively poor weather resistance, and are expensive, making it difficult to promote in a large area

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