Concrete forming construction method based on concrete segregation degree testing device

Abstract

The invention discloses a concrete forming construction method based on a concrete segregation degree testing device. The method is characterized in that the forming construction method is a method for measuring the resistance value of newly-poured concrete with the relative height in different time periods based on a testing device. The resistance value is detected within 30 minutes in the earlier stage of solidification, so that the resistance resistivity and the segregation value DR are calculated; a handheld testing device is adopted; high portability is realized; therefore, the device canconveniently and quickly test the segregation degree of the concrete; the operation is simple and accurate; the detection efficiency is improved, time is bought for adjustment before a newly-poured concrete component is completely solidified; the concrete forming component which is correspondingly treated is tested and judged through the testing device, good internal homogeneity of the concrete forming component can be achieved, and cracks generated after concrete is formed are avoided; the structural bearing capacity is improved, and the quality of the concrete forming component is effectively improved; and the method is suitable for being widely popularized.

Description

technical field [0001] The invention relates to the technical field of concrete forming, in particular to a concrete forming construction method based on a concrete segregation degree testing device. Background technique [0002] Concrete is one of the most important civil engineering materials today. It is an artificial material that is prepared by cementitious material, coarse and fine aggregate, water, admixtures and admixtures in a certain proportion, uniformly stirred, densely formed, cured and hardened. Freshly poured concrete means that the concrete is still in a plastic state before setting and hardening. The overall stability and uniformity of freshly placed concrete has a significant impact on its mechanical strength and long-term durability after hardening. In actual engineering, if the overall stability and uniformity of newly poured concrete cannot be guaranteed or local over-vibration occurs, concrete segregation often occurs. Concrete segregation is a pheno...

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Problems solved by technology

Concrete segregation affects the pumping performance of concrete, causing sticking pipes, blocking pipes, affecting the construction period, etc., and reducing economic benefits; affecting the appearance of concrete structures, such as sand grains on the concrete surface, exposed aggregates, exposed steel bars, etc. Cracks are easy to appear after forming, which will greatly reduce the strength of concrete, seriously affect the bearing capacity of concrete structures, damage the safety performance of structures, and seriously cause rework, resulting in huge economic losses; poor homogeneity of concrete, resulting in shrinkage of various parts of concrete Inconsistent, prone to concrete shrinkage cracks

[0003] At present, there is no unified standard for the test and evaluation of the anti-segregation performance of fresh concrete at home and abroad. For example, if the aggregate layered sampling and sieving method is used, the experimental workload is large, and the test results are greatly affected by the experimental operator and the accuracy is poor. And it is not suitable for the detection of concrete segregation degree in the construction process; if the slump method is used, it can also indirectly reflect the anti-segregation performance of the reactive concrete through cohesion, but for fresh cement concrete, it is not suitable to use the slump method due to the large slump The Viber consistency method is not only cumbersome and has low precision, but also cannot directly reflect the distribution of aggregates inside the concrete and is difficult to apply in the actual construction process; in actual projects, it is often observed by on-site personnel. Judging the anti-segregation performance of fresh concrete through experience, this method is greatly affected by the site operator and environmental conditions, and it is difficult to objectively and accurately evaluate the degree of segregation of concrete after site construction, which affects the overall quality of concrete after forming

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