Prestressed anchorage acceptance needs attention

Prestressed anchorage acceptance needs attention
Prestressed anchorage comes into play, we should according to the factory file to check the anchorage performance category, model, specification and quantity, it is acceptance shall be in accordance with the following provisions:
Appearance inspection: 10% from each batch of prestressed anchorage and not less than 10 sets, check the appearance and size.Such as a surface crack or exceed the specified product standards and design drawing size deviation, should be allowed another take double the amount of prestressed anchorage redo inspection;Still have a do not conform to the requirements, should be one set of examination, eligible for use;Prestressed anchorage at www.ytyuyingli.com
Second, the hardness test from each batch extract 5% of the prestressed anchorage and not less than 5 sets, parts of including hardness requirements do the hardness test (porous prestressed anchorage clip, clamp plate each extraction for at least 5 pieces).Each component test 3 points, the hardness should be within the scope of the design requirements.If there is a part, it should be another take double the amount of parts redo test;If there is still a part, should inspect, eligible for use;
Three, static load anchoring performance test after the two test, should be out with six sets of prestressed anchorage, assembled into three prestressed prestressed anchorage assemblies, static load anchoring performance tests are carried out, such as a specimen does not conform to the requirements, it should be another take double the amount of prestressed anchorage redo test;If there is still a specimen does not conform to the requirements, then the number of prestressed anchorage for nonconforming product.
Note: for general engineering arena of prestressed anchorage, acceptance, the static load anchoring performance, can also be provided by the prestressed anchorage factory test reports.
1. Fixture in acceptance, only do static load anchoring performance test, the test method and the prestressed anchorage are the same.
2. Zhang method after the arena of the connector, acceptance, should be the same as the prestressed anchorage, a first connector into acceptance regulation, should be the same as the jig.Static load anchoring performance of connector, can be drawn from the same batch of 3 sets of three prestressed tensioning device connector assembly experiment.
3. Prestressed reinforced with prestressed anchor, fixtures and connectors the division of acceptance batches of: under the condition of the same material and the same production process, the prestressed anchorage and fixture should take no more than 1000 sets of as an acceptance of the batch;Connector should take no more than 500 sets of as an acceptance of the batch.
4. The prestress of prestressed anchor, fixtures and connectors static load anchoring performance test method, should be used according to the provisions of this code chapter 5