New Grouting Materials Research Based On Quick Treatment Roadbed Holes Disease

While a large number of road building, some roads are gradually entering the period of repair and maintenance with the rapid development of road traffic. In recent years, subgrade instability of deformation and failure problem occurs frequently because of concealed holes in the road embankment. It is not only seriously affect the smooth flow of road traffic and caused a great security risk to collapse sections of vehicular and pedestrian. In order to ensure traffic safety and smoothness of road traffic, make because of the roadbed instability and destruction caused by the concealed holes under the roadbed timely and effective control and solve. Grouting technology governance of such roads disease is a better engineering and technical measures.Papers on the basis of grouting material literature collection, collation, analysis, and combined with uniform design theory and laboratory test methods for the development and application of grouting material. Development of new grouting material for in the roadbed holes diseases fast Treatment. The main content of the thesis:1. According to the summary and comparison of the technical characteristics of single-liquid grouting method grouting method and double-liquid. Found in the double-liquid grouting method, the slurry mixed mode and double-liquid grouting directional regulation can always adjust at any time. The setting time of the slurry can be available in a few minutes to several hours to regulating. Double-liquid mixing ratio can random mixed, and able to achieve orientation, quantitative, constant pressure to double fluid grouting. Therefore, Papers selected double-liquid grouting technology on the roadbed holes disease engineering quickly Treatment.2. The slurry stone body strength to meet the subgrade carrying capacity, and the setting time of the slurry can be self-regulation. Meeting the two basic technical requirements based on grouting technique quickly treatment to the roadbed holes disease. Thereby determining the main agent of the new grouting material for52.5R type portland cement and42.5R type sulphoaluminate cement.3. Presence of portland cement slurry setting time is longer, less liquid, as well as the early strength defects. In the preparation of the slurry, selected flocculant, water reducer and early strength agent to improve performance of portland cement slurry. In addition, combined with the technical characteristics of the double-liquid grouting method. Selected faster setting time, high early strength sulphoaluminate cement with Portland cement composite preparation. To ordinary portland cement grout characteristics are further improved.4. When sulphoaluminate cement and Portland cement mixed, prone to speed up the coagulated (or even occur anxious condensate) and reduce early strength within the large ratio range. In the new grouting materials research, choice gypsum powder to composite slurry preparation and obtain rapid hardening, early strength and low shrinkage composite cementitious material system.5. On the basis of portland cement and sulphoaluminat cement slurry test modified. The use of uniform design method in double-liquid design of a complex formula. Obtain ideal grouting material that the setting time of the slurry and stones strength can be arbitrary regulation.