Prestressed pipe pressure slurry chooses what raw materials

Prestressed pipe pressure slurry prestressed pipe pulp raw material prestressed pipe pressure cement paste price highway bridge engineering prestressed pipe used in the cement paste should be consistent with existing national standards common Portland cement ( GB175) Regulation, the varieties of cement and the strength grade shall be selected through concrete mixture ratio test, and its features should not of concrete strength, durability, and job performance. When using aggregate alkali activity, in concrete appropriate chooses alkali content is not greater than zero. 6% of low alkali cement. Cement comes into play, should be attached to the quality of the prestressed pipe pressure pulp factory test inspection report and qualified certificate, and shall be in accordance with the batches of the same manufacturer, the same variety, the same strength grade and the same date of the strength of cement, fineness, stability and knot time performance test. Bulk cement should be per 5001 for a batch of bagged cement should be per 200 for a group of less than 500 t / 200 t, also count as a batch. When the cement quality is suspect or be affected with damp be affected with damp or storage time more than three months, should resample the reinspection do not coincide, and should be used according to its retest results. The inspection test method of cement should comply with current industry standards ( The highway engineering cement and cement concrete test procedures IGE3O) Highway bridge mix table using bulk cement process, bulk cement in the construction site should be dedicated cement storage tank; Using bagged cement, should prevent the lost memory in the process, and unhappy, deposited in the open air between temporary outdoor should be set aside the whole and put gold 'with variety, strength grade and the moisture of manufacture date according to the number of storage. Fine aggregate fine set by using grading good hard grain clean since the particle size is less than m for river sand; When the river sand is not easy to get that can provide a synthesis of the sand or the material should not be in the sea, have to use, should be after flushing in three-phase aggregate technology standard BHB 1 table 6. 3. 1 fine aggregate technical indicators.