Effect of Catalyst on Mechanical Properties of Polyurethane Grouting Materials
In order to ensure the strength effect of grouting materials used for crack filling in coal and rock mass,catalysts with improved mechanical properties were added to existing grouting materials,and the characteristics of diethylenediamine(A33),potassium acetate(KAc),dimethylaminoethoxy ethanol(ZR-70)and dimethylaminomethyl phenol(DMP-30)were studied.The comparison experiment was carried out by the method of mutual mixing,and the composite catalyst was finally selected to consist of A33 and DMP-30 with a mass ratio of 1.5:1,which obtained a better reinforcement effect.
coal rock reinforcementgrouting materialcatalystpolyurethane
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