CGM high-strength non-shrinkage grouting material expansion of the performance of the study

CGM high-strength non-shrinkage grouting material performance study of books in article 1. Room temperature swelling in the process of equipment installation, with grouting material casting secondary grouting layer on the surface height, they should not be below the height of the initial surface, and up to a certain expansion, this deformation is called vertical expansion. Anchoring of anchor bolts, also needs to have certain expansion stress, the bolt is in stress field, in order to improve its ability to resist drawing. According to the GJ119 - 88 'technical specification for concrete with the seam an agent application of the provisions of the determination of the series products of CGM grout material inflation rate at room temperature, the results are shown in table 2. Inflation rate of series products of CGM at room temperature models d3d7d10d14d28dcgm - 1 ‰ 10. 180. 340. 450. 500. 500. 50 cgm - 20. 150. 350. 430. 440. 450. 45CGM- 30. 200. 360. 490. 520. 520. 52CGM- 40. 210. 360. 500. 530. 530. 53 at room temperature, CGM grout material series products have certain vertical expansion, expansion rate at 0. 1% - Within the scope of 10%, and starts around 7 d stable. 2. Expansion at low temperature under the condition of low temperature, the chemical activity of the expander play not to come out, the expansion significantly lower value!