H - 60 prestressed pipe pressure slurry grouting techniques

H - Prestressed pipe pressure slurry H - 60 H - 60 prestressed pipe pressure slurry manufacturer 6 grouting, the vertical channel H - curve concreted complete 60 prestressed pipe pressure slurry should be of low pressure, pore pressure: in the structure or component above a layered set channel, H - 60 prestressed slurry pipeline pressure should be in accordance with the lower before the order of the upper house. The same pipeline pressure should be on time. Grouting shall be carried out slowly and evenly, without interruption, and should be vent all the peak, in turn, open and close one by one, make the pore exhaust flow. Technical specification for construction of highway bridge ( JTG / tf50 - 2011) 7．9．7H- 60 prestressed pipe pressure pulp slurry mixing finish to the continuation of pressure into the channel time shoulds not be more than 40 min, and before use and injection process should be continuous stirring, for because of the delay caused by using cement paste fluidity decrease, not through additional add water to increase its mobility. 7 mpa; 0 mpa. 4 mpa. H - Within 10 mpa fan4 hua. After vacuum stability, should immediately open channel pulp on the door reading, at the same time start the continuous grouting grouting pump. 10 grouting specimen, standard curing 2 to abuse and flexural strength test, resistance to pressure as the basis of quality evaluation. H - 60 prestressed slurry pipeline pressure test method should be according to the existing national standard cement mortar strength testing method ( SO method) 》（ B / T17671) The Wei Ding execution; Quality evaluation method can be implemented with reference to the provisions of chapter 6 of these regulations