EXPERIMENTAL STUDY OF A NEW POLYMER GROUTING MATERIAL
LI Liping1，LI Shucai1，ZHANG Qingsong1，CUI Jinsheng2，XU Zhenhao1，LI Zhao2
(1. The Research Center of Geotechnical Engineering，Shandong University，Jinan，Shandong 250061，China； 2. Hock-weber Mining and Engineering Co.，Ltd.，Yanzhou，Shandong 272104，China)
Abstract：In order to find the proper grouting material for treatment of water inrush and rock reinforcement in deep underground engineering，the feasibility of a new polymer grouting material is analyzed. The experimental properties of cohesion，gelation，strength and virulence of the new polymer grouting material are studied in the laboratory. It shows that this new polymer grouting material is of high fluidity，strong adhesion and durability，comparing with other types of grouting material. It has advantages on convenient storage and transportation，simple and practical grouting technology，non-poisonous and water-expanding property. In addition，by the grouting simulation test in sandy gravels，the influences of grouting pressure，grouting time，permeability coefficient，porosity upon grout diffusion radius，concretion strength and their correlation were analyzed. The grout diffusion radius increased with the increasing of grouting pressure，grouting time and permeability coefficient，and decreased with grout temperature. Distinct influencing factors on grout diffusion radius were grouting pressure and permeability，but the influences of grout temperature and grouting time were small. Strength of grouted gravels increased with the increasing of grouting pressure，grouting time，porosity and grout temperature. The results show that the new polymeric grouting material has rapid gelation，high strength and effective dilation，comparing with traditional solidified ones，which is a better polymeric grouting material for the treatment of water inrush and engineering reinforcement.
