Construction Technology ｜ Shanghai “building falling”! The female manager was sentenced to 3 years
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This partial revision focuses on summarizing the modified contents indicated by the underline in this specification; The provisions in bold are mandatory and must be strictly implemented
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Prestress sub item 3.1: specify the mobilization requirements of slowly bonded prestressed steel strand 3.2: all prestressed tensioning shall be checked 3.3 grouting and anchor sealing: specify the strength, sampling and test of grouting material 4
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NOCITCE changed the push rule because of WeChat official account
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Reinforcement sub item: the acceptance requirements for HRB335 reinforcement are cancelled, the maximum total elongation is changed to the maximum total force elongation, and the weight deviation of reinforcement is slightly corrected
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Recent hot information recommendations, click to view: 1
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Add clear requirements for detection and sampling of thickness of wall column reinforcement protective layer 2 Adjustment of allowable deviation value of reinforcement cover thickness 8
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When solid rebound coring is classified as components of the same inspection batch, the construction time shall not exceed 3 months 7
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In particular, it should be reminded that the thickness requirements of reinforcement protective layer are increased
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This revision clearly stipulates that when the tested components are divided into the same inspection batch, The construction interval shall not exceed 3 months
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The classic case is worth reviewing
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The inspection items such as concrete forming quality and reinforcement sleeve grouting plumpness in the laminated shear wall are added to the fabricated structure
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The earth pressure was so terrible
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The main contents of this partial revision are: (1) the provisions on the use of new measuring tools are added（ 2) The acceptance requirements of HRB335 reinforcement are cancelled[ Note] this is consistent with the code for design of concrete structures revised last year
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Thickness of structural entity reinforcement protective layer 1
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At the same time, some details need to be paid attention to, such as the division of inspection batches for rebound coring
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Construction technology China personnel examination network: matters related to the first construction examination in 2021! Publish more registration notices! Source: Official Website of the Ministry of housing and urban rural development, Civil Engineering Forum, concrete and cement products website
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The copyright belongs to the original author and original source
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Fabricated sub item 4.1 specify the requirements for acceptance, fire prevention, thermal insulation, waterproof and grouting of fabricated components 4.2 prefabricated components: redefine the mobilization acceptance requirements and acceptance standards of prefabricated components 5 Concrete structure sub division 5.1 add fabricated structure entity detection items 5.2 delete 600 ° days for structural entity curing test blocks under the same conditions 6
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The application of HRB335 reinforcement is no longer allowed, so naturally there is no need for acceptance（ 3) Improve the acceptance requirements of prefabricated component formwork（ 4) The requirements for mobilization acceptance of prefabricated components are supplemented and improved（ 5) Supplemented and improved the acceptance requirements of fabricated structures（ 6) The strength acceptance requirements of structural solid concrete are supplemented and improved（ 7) The quality inspection requirements for the grouting connection entity of the fabricated structural reinforcement sleeve are added
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The term of 600 ° days is no longer used for curing under the same conditions
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The detection items of reinforcement protective layer thickness of wall and column are added, and the allowable deviation value of reinforcement protective layer is more stringent than that of the original foundation
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Since then, there has been a unified national acceptance standard for the acceptance of fabricated structure
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Formwork sub item: supplemented, corrected and improved the requirements for formwork acceptance of prefabricated components
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Add appendix G Summary of concrete forming quality inspection in laminated shear wall this 50204 revision has higher requirements for the construction unit, such as structural entity inspection
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