ZX-119 pressure slurry Executive Standard: JTG / TF50-2011 I. Introduction pressed pulp product having a micro-expansion, not contraction, high flow, self compacting, low bleeding rate, filling the high, thin small-diameter balloon Mo high-strength, anti-rust rust, chlorine-free low-alkali salts, high adhesion, green excellent performance. Free of oxides, chlorides, sulfites and nitrites and other harmful components of steel by high performance plasticizers, surfactants, calcium silicon micro-expanders, heat of hydration inhibitors, migratory corrosion inhibitor nanoscale calcium aluminosilicate minerals iron, low heat stabilizer and low alkali Portland cement and other refined composite made of pressed pulp. Second, use for post-tensioned beams prestressed pipe grouting filling material, prestressing steel to prevent corrosion, to ensure the effective transfer of stress between the beam and the prestressed concrete structure, the inner bore full dense paste, paste to maintain a certain The PH value range, completely wrapped prestressing steel after hardening slurry has high strength and elastic modulus and the expansion and contraction without adhesion. Applies only to the anchor Zhang Liang prestressed pipe grouting filling grouting, anchor systems, continuous wall head stanch grouting, curtain grouting; foundation grouting equipment, plasma and beam-column joints plate sit, repair works and anchor bolts, without vibration Self - compaction, micro-expansion, anti-oil seepage, resist corrosion, antifreeze impermeability; for high-strength steel in prestressed concrete members pore filling, road bridge strengthening, to run for 24h, and a strong bond with the hardened concrete , no obvious signs of repair, controlled setting time of the slurry that is moderate. Third, the technical points slurry of water: for prestressed concrete beam pipe grouting cement ratio no greater than 0.33. Fourth, the construction apparatus, stirrer speed should be greater than 1000Y / min, maximum line speed limit paddle within 15m / s, the shape of the blades and speed should match. 2, grouting machine with continuous pressure pump, pressure gauge minimum scale value should be less than 0.1Mpa, the maximum range should make the actual operating pressure within the 25-75 percent range. 3, the storage tank with agitation. 4, such as the use of vacuum-assisted grouting process should reach a negative pressure pump 0.092Mpa of. 5. measures: cement, grouting agent (material), water weighing should be accurate to ± 1.0%. Fifth, the technical requirements 1, cleaning construction equipment: cleaning-equipment clean, there should be no residue after, water, mixer filter space should be less than 3mm × 3mm. 2, slurry blending operation in order: in a blender to join the 80-90% of the actual amount of mixing water, start mixer, even added all the pressure slurry, stirring plus side, all of the powder was added after stirring 2min, the last to join more than 10-20% of the amount of mixing water and continue stirring 2min can be used. 3, fluidity test: once every 10 degree field test for detection of flow, after its fluidity to meet the requirements, you can pass through the filter into the storage tank, the slurry should continue stirring in the storage tank in order to ensure slurry flowability. 4, under normal circumstances should not be in the construction process, increase the flow of extra water. Sixth, the technical requirements 1, before grouting, clear the beam tunnel of debris and water. 2, should be open before grouting pressure pump, squeezing the slurry discharged from the mouth a little, in order to rule out grouting pipe in the air, water, slurry, when the discharge slurry fluidity and consistency when stirred tanks, before commencing pressed into the beam tunnel. 3, the maximum grouting pressure should not exceed 0.6Mpa, grouting filling should reach full bore and the other end to the exhaust vent with a predetermined flow of slurry same date. Close the pulp outlet, should remain less than 0.5Mpa and not less than 3min regulated period. 4, for a continuous beam or plasma pressure up, let the pipe water - slurry suspension of freely flowing out from the outlet end; slurry pump again until a homogeneous slurry outlet end outflow, under the pressure of 0.5Mpa to keep 5min, this the process should be repeated 1-2 times. After grouting anchor plate should be pressed / a dense plasma conditions grouting hole inspection and, if not dense, should be supplemental irrigation, in order to ensure a fully dense tunnel. 5, such as vacuum-assisted grouting process before grouting should first be evacuated to a vacuum degree of stability within the pore between -0.06Mpa ~ -0.08Mpa, stable vacuum degree, immediately open end of the pipe valve grouting while cracking pressure pump for continuous grouting. 6, grouting order: before you get on the same pipeline grouting should be carried out continuously, once completed, the slurry was stirred to push into the beam time should be small 40min. 7, grouting sampling: grouting process, each hole beams should make three groups standard curing test body (40mm × 40mm × 160mm), compressive strength and flexural strength tests, carried out on grouting record (including: grouting material, mixing ratio, grouting date, stirring time, the machine fluidity, slurry temperature, ambient temperature, packing pressure and time, vacuum, spot grouting responsible for supervising engineer, etc.). Seven, grouting time and technical requirements, the final tensioning is complete, the pipeline grouting should be within 48h. 2, you can pay in advance the library after grouting, but the need to ensure the strength 28d standard specimen reaches a predetermined value. Beam, when the ambient temperature grouting slurry and slurry temperature should be between 5 ℃ ~ 30 ℃, within 3d, beam and ambient temperature should be higher than 5 ℃ after grouting and grouting, or maintenance measures should be taken. At higher than 35 ℃ construction, construction should be selected at night or evening, less than 5 ℃, should be required to deal with winter construction technique, the amount increase air content indicators. Eight, slurry storage and packaging 1. Packaging: internal pressure paper pulp plastic outer moisture-proof packaging. 2, Weight: net weight of each member is pressed pulp 25kg ± 0.5g. 3, the production date and batch number, to indicate the factory certification. 4. Shelf life: standard products manufactured at room temperature storage conditions, the shelf life of 90 days the slurry pressure. 5. Storage: kept in a cool and dry storage warehouse security, waterproof, anti-breakage, anti-high temperature (45 ℃ above). 6, transportation: protected against rain, sunlight and keep the packaging intact.