How to choose high-strength non-shrink grout material1

1, water retention, water retention generally good high-strength non-shrinkage grouting material in construction process does not produce serious bleeding phenomenon. Poor water retention and grouting material, water easy to precipitate internal to the surface, in the place where water seepage left many capillary channel, thus affect its durability, easy to frost crack in winter. 2, fluidity, fluidity is refers to the new mixing high-strength non-shrinkage grouting material under the action of gravity or mechanical vibration, can flow and uniform close-grained filling ability of the template. Fluidity directly affects the size of the construction difficulty and hardening of the quality of grouting material. If grouting material too dry thick, hard to shape and compact, easy to cause internal and surface defects such as holes; If grouting material too thin, after classics agitate, prone to mud and water water buoyancy and quartz sand aggregate sinks such as stratified segregation phenomenon, affecting the quality of grouting material uniformity, forming the compactness. 3, cohesion cohesion refers to the new mixing high-strength non-shrink grout material between the composition of the material has a certain cohesion, to ensure not occur stratification and segregation phenomenon, enables the grouting material to maintain the overall uniform and stable performance. Poor cohesion is easy to separate the mud and aggregate, after casting is easy to appear the phenomenon such as honeycomb, empty; Cohesion sex too easily lead to grouting material fluidity, which makes it impossible to contact better contact close-grained, make the construction quality is affected.