Grouting reinforcement material for broken rock mass in high-temperature environment and application thereof

CN118239743BActive Publication Date: 2026-06-19SHANDONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANDONG UNIV
Filing Date
2024-02-28
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Existing grouting reinforcement materials have short working time, low mechanical strength of the stone mass, and poor durability under high ground temperature and high ground pressure environments, making it difficult to meet the needs of deep-buried tunnel construction.

Method used

The composite material is composed of slag, fly ash, special cement, high-calcium solid waste, and ultrafine aggregates. A high-temperature resistant mineral phase is generated by activating the composite hydration accelerator, and fibers and nanomaterials are added to form a dense three-dimensional network. The setting time is adjusted by combining styrene-acrylic emulsion and water-reducing agent to enhance the material performance.

Benefits of technology

It achieves long operating time, rapid strength growth and good durability in high geothermal environments, improves the tensile, bending, crack and impermeability of materials, reduces costs and improves the utilization rate of solid waste resources.

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Abstract

This invention discloses a grouting reinforcement material for fractured rock masses in high-temperature environments and its application, relating to the field of grouting reinforcement technology. The grouting reinforcement material comprises the following components by weight: 500-600 parts slag, 350-400 parts fly ash, 100-150 parts special cement, 50-100 parts high-calcium solid waste, 46-90 parts ultrafine aggregate, 80-160 parts composite hydration accelerator, 20-50 parts styrene-acrylic emulsion, 2-5 parts retarder, 5-15 parts water-reducing agent, 9-12 parts water-retaining agent, 2-8 parts fibers with a length of 5-15 mm and a diameter of 8-40 μm, 2-5 parts defoamer, 1.2-2 parts nanomaterials, and 750-1200 parts water. Based on the theory of geopolymer preparation, this invention utilizes the composite hydration accelerator to activate slag, fly ash, and other materials, achieving excellent mechanical strength and grout properties at high temperatures. It can be applied to grouting reinforcement of fractured rock masses in high geothermal environments.
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