Study on the Performance of Grouting Material Modified by Sodium Lignosulfonate

Abstract In order to improve the problems of poor stability, low flowability, and weak corrosion inhibition of the grouting material, sodium lignosulfonate (SL) was used as a modified component of the pore grouting material in this paper. The non-uniformity coefficient was introduced to evaluate the stability of the grouting material. And, macro and micro experiments were used to comprehensively evaluate the influence of sodium lignosulfonate on the flowability, stability, strength, and corrosion inhibition of the grouting material, revealing the mechanism of SL’s modification effect on the pore grouting material. The results show that the addition of SL can significantly improve the stability of the grouting material. When the dosage is 4%, the mechanical properties of the grouting material are optimal; The addition of SL can significantly reduce the corrosion products on the surface of steel strand samples, and the research results provide data support and technical guidance for the application of SL in grouting materials.