Research Article
Fracture Characteristics of Polyurethane Grouting Materials Based on Acoustic Emission Monitoring
| Raw materials | Type | Dosage range (g) | Specification |
| PAPI | PM-100 | 18.0 –25.0 | Chemically pure | MDI (MDI) | PMM-20 | 3.0 –6.0 | Chemically pure | Polyether triols | GP-306 | 15.0 –25.0 | Chemically pure | Polyether tetraols | HK-4110 G | 15.0 –25.0 | Chemically pure | Catalysts | A33 | 0.5 –1.2 | Chemically pure | Surfactants | BL-8468 | 0.5 –0.8 | Chemically pure | Chain extenders | DEG | 1.2 | Analytically reagent | Plasticizers | DOP | 6.0 | Analytically reagent |
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