Large volume concrete structural solid strength detecting method

A mass concrete and detection method technology, applied in the direction of strength characteristics, foundation structure engineering, foundation structure test, etc., can solve the problem of not being able to scientifically evaluate and reflect the true strength of mass concrete and its development law, delaying the removal of the formwork support system Time, project duration and other issues, to achieve significant economic and social benefits, shorten the overall project duration, improve the effect of accuracy

Inactive Publication Date: 2007-08-22
青建集团股份公司
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Problems solved by technology

However, in mass concrete, due to the heat of cement hydration, the internal temperature of the concrete is relatively high, and its physical strength is greatly affected by the temperature rise, and its environmental conditions are quite different from those of the test blocks under the same conditions.
Therefore, using the test strength of the curing test block u...

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  • Large volume concrete structural solid strength detecting method
  • Large volume concrete structural solid strength detecting method
  • Large volume concrete structural solid strength detecting method

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Embodiment 1

[0016] Taking the reinforced concrete structure construction of the engineering exhibition hall of Qingdao International Convention and Exhibition Center as an example, the implementation plan of this patented technology is introduced in detail:

[0017] The axis dimension of the roof beam and slab on the first floor of the exhibition hall is 144m×60m, and the column grid size is 24m×30m. Post-casting strips are set on the south side of the K-axis and the north side of the M-axis, dividing the entire plane into 60m×56m, 60m× 56m, 32m×60m three areas. The cross-sectional dimensions of the main beam of the beam-slab longitudinal and horizontal frames are 1200mm×2400mm and 1400mm×2800mm respectively, and bonded prestress is adopted; the cross-sectional size of the longitudinal and horizontal frame secondary beams is 400mm×1400mm, and non-bonded prestress is used. The concrete strength grade of the beam and slab is C40, and the concrete volume is about 5000m3. The concrete struct...

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Abstract

The invention discloses a method to test intensity of mass-concrete structure entity. Make sufficient-size samples according to construction entirely before the project. For changes of intensity and temperature of samples in early age, simulate in laboratory to make temperature-change curing of different samples and get their actual intensity under this temperature. When samples have striking conditions, carries intensity ultrasonic rebound and entity coring experiments for concrete quality. Hydrate cement of concrete and test in thermo temperature field to get intensity relationship of projects carried depending on early age intensity of concrete. Projects are carried according to above data. The method can test intensity of mass-concrete structure entity accurately and change the past method of assessing concrete intensity only by using strength value of same condition and standard curing coupon or rebound value of concrete, which improves accuracy, can shorten time limit of project greatly and has notable technical economic performance.

Description

Technical field [0001] The invention belongs to the construction technology of reinforced concrete structures; in particular, it relates to a detection method for the solid strength of large-volume concrete structures. Background technique [0002] In recent years, with the further expansion of my country's opening to the outside world, a large number of public buildings such as international convention and exhibition centers, airports, stadiums, and commercial centers have been frequently constructed in major cities in my country. Due to the functional requirements of such buildings, they generally require high space and long spans. , The structural design mostly adopts the concrete beam-slab structure, in which the beam is generally a large cross-sectional size and belongs to the mass concrete structure. [0003] According to the requirements of the code, the formwork support system of such concrete members can only be dismantled after the concrete solid strength reaches 10...

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Application Information

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IPC IPC(8): G01N3/00G01N29/04G01N33/38E02D33/00
Inventor 张同波周伟桥
Owner 青建集团股份公司
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