Chizhou, Binzhou grouting material - the characteristics of ready-mixed grout 
 If the grouting material is not in the field batch mixing, but the direct casting from a central mixing station delivered to the site, which is ready-mixed grout material. Production methods from the point of view, the grouting material has more advantages than the traditional grouting material. In many countries, mainly in the form of grouting material is ready-mixed grout material. 
 In a crowded site or road construction, there is not enough open space available for placement of equipment and stacking a large number of aggregate, ready-mixed grout, the Chizhou grouting material is particularly useful. However, one of the biggest advantages of ready-mixed grout material can be produced under better controlled conditions, this is any ordinary site (except for large projects) are impossible. As the center mix station near the plant operation, and so can carry out a real strict control of the whole process of production by the fresh grouting material. To be particularly careful during the grouting material transport using the mixing trucks can ensure the quality. But, of course, pouring and compacting process is the responsibility of site staff. Only need a small amount of grouting material, or only intermittently pouring of concrete, ready-mixed concrete is also good. 
 Ready-mixed grout, Chizhou grouting material, the Binzhou grouting material, there are two. The first mixing station in the center to complete mixing and then stirring good grouting material transport out, placed in the mixer and slowly rotate to prevent the mixture segregation and premature hardening. The grouting material is called a centralized mixing, in order to distinguish it from the second - Transportation mixing or truck mixing the grout material. Here, the material in the central station in batches weighing, mixing in the mixer, but the way to the site or prior to the grouting material is about to discharge. Mixing can be done long distance transport in the transport process, and will not be a great loss because the transit time is too long. Used as a mixer truck capacity, only alone for 63% of the trucks stir the same ready-mixed grout. Or less, is the central mixing 80% of the grouting material drums. Sometimes in order to improve the capacity of the mixing truck, concrete advance in the central station for part of mixing to complete mixing, on the road. This mixing capacity of the truck is usually 6m3 or 7.5m3. 
 Required to indicate, that the agitation is different from the mixing, depending on the rotation speed of the mixer: the stirring speed of 2 ~ 6r/min, and stirring speed of 4 ~ 16r/min; Therefore, in this definition, some cross. May be able to notice, stirring speed affects the hardening speed of rotation total control of the heterogeneity. If the grouting material, Chizhou grouting material the Binzhou grouting material does not shrink mixing in a central mixing plant, the requirements of the mixer rotation from 70 to 100 rpm. ASTM C94-94 provides rotation shall not exceed 300 rpm. Unless the aggregate is relatively soft and easy to crush, especially the smaller part of the requirements is not necessary. 
 If the grouting material to reach the site before adding the last part of the water (such as in hot weather), ASTM C94-94 requirements for discharge before the stirring speed and rotated at 30 rpm. 
 The main problem of the production of ready-mixed grout material to maintain the workability of the mix compounds to the pouring. Grouting material hardens with time, to extend the mixing time and high temperature, will also promote hardening. In the transport stirring, stirring before the start was able to add water; in accordance with ASTM C94-94, contact cement and stone aggregate limit of 90 min, BS 5328-1:1990 allows for 2h. The time limits may be extended to 3h or 4h, as long as the grouting material, of Chizhou grouting material transport temperature below 32 ° C, the grouting material buyer may relax some allow 90min limits; data indicate that use of the retarder. 
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