Investigation of influence of additives on properties of multi-molecular organic solutions used for permeation grouting

Abstract

Permeation grouting for stabilization of dispersive sandy and gravely soils is in use from beginning of 19th century and has high importance for various underpinning, tunneling, and structural strengthening works. As materials for permeation grouting are applied not only cement mortar or silica gel in many compositions but multi-molecular organic solutions too. From multi-molecular organic solutions for permeation grouting are in use various synthetic resins such as acrylic, urea-formaldehyde, or other polymer resins. Urea-formaldehyde resin has right physical and mechanical properties for applying in soil stabilization but additives can change these properties. For example, additives can increase density, pH-rate, and gel-formation time of urea-formaldehyde resin. Additives can decrease viscosity of solutions based on urea-formaldehyde resin. Additives can improve environmental aspects of use of multi-molecular organic solutions for grouting of sandy soils. Long-time investigations of influence of additives on properties of multi-molecular organic solutions used for soil stabilization give good results for optimization of composition of materials for grouting.