Polymer-reinforced prestressed concrete cylinder pipe molding technology
A prestressed steel, forming process technology, applied in applications, tubular items, household appliances, etc., can solve problems such as electrochemical corrosion, corrosion failure of steel wires and steel cylinders, perforation leakage, etc., to reduce the formation of micro-cracks, enhance mixing Uniformity, the effect of preventing micro-crack initiation
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[0033] Example 1
[0034] (1) Preparation of lining mold: Wrap a hoop prestressed steel wire on a concrete pipe core with a steel tube to prepare a semi-finished PCCP pipe. The semi-finished PCCP pipe is directly used as an lining mold, and the concrete pipe core is prefabricated There is a reinforcing net; the setting of the reinforcing net is to improve the mechanical properties of the pipeline such as compression and tension resistance, prevent the occurrence of cracks, and reduce the burden of the steel cylinder in the pipeline;
[0035] (2) Pretreatment of the outer mold: a layer of release agent is coated on the inner wall of the outer mold;
[0036] (3) Construction of the casting structure: from the inside to the outside, the inner lining mold, the reinforcing net, and the outer mold are formed into a casting structure, and the polymer concrete is poured into the casting structure. After forming, the outer mold is removed to obtain the polymer reinforced prestressed steel Tu...
Example Embodiment
[0051] Example 2
[0052] The difference from Example 1 is:
[0053] The polymer concrete includes 92% of aggregate, 8% of resin binder and auxiliary agent in terms of mass percentage, and the aggregate includes 1-with a mass ratio of 20:30:12:12:5:3. 3 mesh quartz sand, 5-9 mesh quartz sand, 20-30 mesh quartz sand, 40-60 mesh quartz sand, 80-100 mesh quartz sand, 140-200 mesh quartz sand.
[0054] In terms of mass percentage, the auxiliary agent includes a curing agent accounting for 1.8% of the mass of the resin adhesive, an accelerator accounting for 0.4% of the mass of the resin adhesive, a coupling agent accounting for 2% of the mass of the resin adhesive, and a resin adhesive. A polymerization inhibitor of 0.03% of the mass of the mixture, a flame retardant of 5% of the mass of the resin binder.
[0055] During the preparation process of the polymer concrete, the gel time in step D is 3 min. During gelation, the ambient temperature is controlled to be 20°C-21°C and the humidity...
Example Embodiment
[0056] Example 3
[0057] The difference from Example 1 is:
[0058] The polymer concrete includes 93% aggregate, 7% resin binder, and auxiliary agent, in terms of mass percentage, and the aggregate includes 2-weight ratio of 30:40:16:16:10:8. 3 mesh quartz sand, 6-8 mesh quartz sand, 15-25 mesh quartz sand, 35-55 mesh quartz sand, 90-110 mesh quartz sand, 150-180 mesh quartz sand.
[0059] In terms of mass percentage, the auxiliary agent includes a curing agent accounting for 1.4% of the mass of the resin adhesive, an accelerator accounting for 0.3% of the mass of the resin adhesive, a coupling agent accounting for 1.5% of the mass of the resin adhesive, and a A polymerization inhibitor of 0.025% of the mass of the mixture, a flame retardant of 6% of the mass of the resin binder.
[0060] During the preparation process of the polymer concrete, the gel time in step D is 4 minutes, and during gelation, the environmental temperature is controlled to be 20°C-22°C, and the humidity is 52...
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