Overview
High-temperature grouting material is a refractory composite formulated with cementitious binders, aggregates, and heat-resistant additives like alumina or silica fume. Developed for industrial applications, it bridges the gap between conventional construction materials and specialized refractory products. Unlike standard grouts, these materials maintain structural integrity at sustained temperatures exceeding 1000°C, making them indispensable in metallurgy, petrochemical, and power generation industries. Their formulations often comply with international standards such as ASTM C1107 for packaged dry mixes.
Physical and Chemical Properties
The material exhibits near-zero shrinkage during curing and thermal cycling, a critical property to prevent crack formation under thermal stress. Typical compressive strength ranges from 50-100 MPa at room temperature, retaining 60-80% of strength at 1000°C. Chemically, formulations resist acidic slags and alkaline environments common in industrial settings. Hydration products transform into stable ceramic phases at high temperatures, with some grades containing microsilica to enhance density and reduce porosity below 15%.
Main Applications
Primary usage includes sealing and leveling in coke oven batteries, blast furnace bases, and boiler supports where temperatures exceed 300°C. In petrochemical plants, it secures reformer furnace foundations and anchors flare stack bases. Emerging applications include concentrated solar power (CSP) plants, where grout must endure daily thermal cycling. Specialty grades with zirconia additives serve in glass melting furnaces, withstanding temperatures up to 1600°C while resisting molten glass corrosion.
Safety and Storage
Unhydrated powder requires protection from moisture absorption, which can prematurely activate cementitious components. Bulk bags should be stored on pallets with airtight seals, ideally at 40-70% relative humidity. During application, proper ventilation is mandatory due to alkaline dust release. Cured material poses minimal hazards, though thermal shock during rapid cooling may cause spalling. Always consult SDS for specific formulation hazards like crystalline silica content.
B2B Procurement Guide
Industrial buyers should prioritize suppliers with ISO 9001-certified refractory production lines. Key procurement considerations include: temperature rating verification through third-party test reports (e.g., according to ASTM C862), minimum order quantities (typically 20-ton batches), and lead times (2-8 weeks for customized formulations). For large projects, request mockup testing to evaluate workability and final properties. Consider logistics - some formulations require temperature-controlled transport. Negotiate technical support clauses for on-site mixing guidance and curing supervision.
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