Environment-friendly low-viscosity high-strength polyurethane grouting lifting material and preparation method thereof

Abstract

The invention discloses an environment-friendly low-viscosity high-strength polyurethane grouting lifting material and a preparation method thereof. The environment-friendly low-viscosity high-strength polyurethane grouting lifting material consists of a component A and a component B, wherein the component A mainly comprises composite polyether polyol, a low-viscosity epoxy resin compound, an amine catalyst, a foam stabilizing agent, water and a flame retardant; the component B mainly comprises an organic tin catalyst, polyisocyanate and the like. The ozone depletion potential of the environment-friendly low-viscosity high-strength polyurethane grouting lifting material disclosed by the invention is 0, the environment-friendly low-viscosity high-strength polyurethane grouting lifting material is clean and environment-friendly, and meanwhile has the characteristics of relatively low slurry viscosity, good flowbility, good groutability and the like, the rise time of the material can be controlled within 10-30 seconds, the foaming time of the material can be adjusted within 60-120 seconds, the foam appearance core density of the material can be within 50-80 kg / m<3>, the foams are uniform and dense, and the compression strength of the material is 0.45-0.70 MPa. Meanwhile as foams, rock and soil are all relatively good in adhesion property, the material is applicable to lifting mediation of buildings, traffic roads and projects under different geological conditions.

Description

1. Technical field [0001] The invention relates to a lightweight grouting lifting material with high mechanical strength and excellent comprehensive performance and a preparation method thereof, in particular to an environment-friendly low-viscosity and high-strength polyurethane grouting lifting material and a preparation method thereof. 2. Background technology [0002] Polyurethane grouting lifting material is a rigid foam with certain strength and lifting effect formed after grouting and foaming, which can be used for foundation lifting and repairing. At present, it has been gradually applied in the field of construction and transportation, providing a guarantee for the rapid repair and safety of buildings and road surfaces. However, during the application of ordinary polyurethane grouting lifting materials, due to the insufficient strength of the material itself, the repair point is prone to collapse again. The main reasons are as follows: First, due to the structural ...

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Problems solved by technology

However, during the application of ordinary polyurethane grouting lifting materials, due to the insufficient strength of the material itself, the repair point is prone to collapse again

The main reasons are as follows: First, due to the structural characteristics of polyurethane rigid foam, its own strength is much smaller than that of consolidated bodies; second, ordinary polyurethane grouting lifting materials mostly use low-boiling physical foaming During the grouting process, the polyurethane reacts to generate a large amount of reaction heat, which will accelerate the escape of the physical foaming agent, resulting in the destruction of the foam structure and the decrease in strength.

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