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In-situ monitoring device and method of cement concrete structure forming process

A technology of cement concrete and monitoring device, which is applied to the generation of ultrasonic/sonic/infrasonic waves, can solve problems such as lack of research on the structure formation process, and achieve the effects of ensuring direct and close contact, accurate test results, and obvious technical and economic benefits.

Inactive Publication Date: 2009-09-09
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is a damaged, intermittent and ex-situ method, and it is mainly aimed at relatively mature cement concrete with a certain strength (after 3 days), but there is a lack of research on the structure formation process of the ultra-early period (from the beginning of adding water to 3 days).

Method used

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  • In-situ monitoring device and method of cement concrete structure forming process
  • In-situ monitoring device and method of cement concrete structure forming process
  • In-situ monitoring device and method of cement concrete structure forming process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Use P.II42.5 Portland cement, polycarboxylate superplasticizer with a solid content of 30%, and tap water. Mixing ratio (g): cement-1300, water-208, admixture-32.5

[0031] First fill the oil bath with heat-resistant oil, then place the oil bath on the electromagnetic stirring device, put the magnetic stirrer and temperature sensor in the electromagnetic stirring device into the oil bath, turn on the power of the electromagnetic stirring device, set the temperature and stirrer speed, heat the heat-resistant oil until it reaches 90°C; according to the above ratio, use a forced mixer to mix well, put the freshly mixed cement concrete into the sample chamber quickly, and then insert the sample chamber with the slurry In the oil bath filled with heat-resistant oil, the two piezoelectric sensors of the ultrasonic instrument are finally clamped by the ultrasonic clamping instrument, so that they are in direct and close contact with the cement slurry in the sample chamber, and...

Embodiment 2

[0033] Use P.II42.5 Portland cement, polycarboxylate high-efficiency superplasticizer with a solid content of 30%, Class I fly ash, Elkem silica fume, S95 finely ground slag, and tap water. Mixing ratio (g): cement-650, silica fume-130, fly ash-130, slag-390, water-208, admixture-32.5

[0034]According to the above ratio, after using the forced mixer to mix well, pour the fresh concrete into the dumbbell-shaped inner mold. First, fill the oil bath with heat-resistant oil, then place the oil bath on the electromagnetic stirring device, and turn the electromagnetic Put the magnetic stirrer and temperature sensor in the stirring device into the oil bath, turn on the power of the electromagnetic stirring device, set the temperature and the speed of the stirrer, and heat the heat-resistant oil until it reaches 90°C; according to the above ratio, use a forced mixer to mix well , quickly put the freshly mixed cement concrete into the sample chamber, and then embed the sample chamber ...

Embodiment 4

[0039] Use P.II42.5 Portland cement, polycarboxylate high-efficiency superplasticizer with a solid content of 30%, Class I fly ash, Elkem silica fume, S95 finely ground slag, and tap water. Mixing ratio (g): cement-217, silica fume-43, fly ash-43, slag-130, sand-433, stone-433, water-70, admixture-16.3

[0040] According to the above ratio, after using the forced mixer to mix well, pour the fresh concrete into the dumbbell-shaped inner mold. First, fill the oil bath with heat-resistant oil, then place the oil bath on the electromagnetic stirring device, and turn the electromagnetic Put the magnetic stirrer and temperature sensor in the stirring device into the oil bath, turn on the power of the electromagnetic stirring device, set the temperature and the speed of the stirrer, and heat the heat-resistant oil until it reaches 90°C; according to the above ratio, use a forced mixer to mix well , quickly put the freshly mixed cement concrete into the sample chamber, and then embed ...

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Abstract

An in-situ monitoring device and method of a cement concrete structure forming process are mainly used for controlling the concrete quality, preferring original materials and optimizing proportioning parameters in the fields of buildings, traffic, bridges, water conservation, underground construction, and the like. The device comprises an electromagnetic stirring device (1), a sample storehouse (2), an oil bath groove (3), an ultrasonic instrument (4) and an ultrasonic clamping instrument (5). During an experiment, first, the oil bath groove (3) is filled with heat resistant oil; then, the oil bath groove (3) is placed on the electromagnetic stirring device (1), a magnetic stirrer and a temperature sensor arranged in the electromagnetic stirring device are placed in the oil bath groove, and newly stirred cement concrete slurry is placed in the sample storehouse (2); the sample storehouse (2) filled with slurry is embedded in the oil bath groove (3) filled with heat-resistant oil; and finally, two piezoelectric sensors of the ultrasonic instrument (4) are clamped by the ultrasonic clamping instrument (5) so that the two piezoelectric sensors are in direct and tight contact with the cement concrete slurry in the sample storehouse (2), and the change curve of acoustic parameters in the structure forming process of the cement concrete slurry is automatically recorded.

Description

technical field [0001] The invention relates to an in-situ monitoring device and an experimental method in the formation process of a cement concrete structure, which belongs to the early performance testing technology of cement concrete. It is mainly used for concrete quality control, selection of raw materials and optimization of mix ratio parameters in fields such as construction, transportation, bridges, water conservancy, and underground engineering. Background technique [0002] Cement concrete is the largest man-made building material in the world and is widely used in construction, transportation, bridges, water conservancy, underground engineering and other fields. With the rapid development of the global economy, the construction scale is unprecedented, and the consumption of concrete is increasing year by year, especially for China, which is developing rapidly. At present, the annual output of concrete in my country reaches 7 billion tons, accounting for 45% of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/34
Inventor 张云升张文华孙国文佘伟
Owner SOUTHEAST UNIV
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