Large volume concrete structural solid strength detecting method

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...

AI Technical Summary

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 under the same conditions as the solid strength of concrete is obviously conservative, and cannot scientifically evaluate and reflect the true strength and development law of mass concrete.

In this case, the dismantling time of the entire formwork support system will be delayed, which will have a serious impact on the overall project duration and increase the project cost

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