Concrete aggregate alkali activity verification method and model

A concrete aggregate and verification method technology, which is applied in the field of concrete aggregate alkali activity verification method and its model, can solve the difficulty of fully satisfying the concrete aggregate alkali activity verification, inaccurate aggregate alkali activity verification results, one-sided verification results, etc. problem, to achieve the effect of reducing the difficulty of detection, reducing deviation and improving accuracy

Active Publication Date: 2016-11-09
CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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Problems solved by technology

[0016] Nevertheless, the "mortar rod fast method" in the prior art only verifies the length of the increase, making the verification results relatively one-sided, and it is difficult to fully satisfy the verification of the alkali activity of concrete aggregates. At the same time, after multiple measurements, Further calculations will increase the error of the detection, and then the verification result of the alkali activity of the aggregate will be inaccurate

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  • Concrete aggregate alkali activity verification method and model
  • Concrete aggregate alkali activity verification method and model

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Embodiment

[0041] A concrete aggregate alkali activity verification method,

[0042] Select the components of the concrete aggregate alkali activity verification device, which include a volumetric bottle 3, a rubber stopper 4, and a U-shaped tube 1, and an indicating liquid 2 is arranged in the U-shaped section of the U-shaped tube 1; the height of the indicating liquid is h ;

[0043] Grind the aggregate used to prepare concrete into fine sand with a sander, put the aggregate, cement, and water into the volumetric bottle 3, stir evenly with a small tamping rod, so that the hydration reaction occurs, and then place it statically 1d, and after ensuring that the mortar hydration reaction is complete, the mortar is in a dry state, that is, it is extruded without water, and then the sodium hydroxide solution with a molar concentration of 1mol / L is loaded into the volumetric flask 3, and the addition amount is 1mol / L to submerge the mortar , then use the rubber stopper 4 to cover the mouth o...

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Abstract

The invention relates to the technical field of detection of concrete performance and particularly relates to a concrete aggregate alkali activity verification method and model. By establishing and processing the concrete aggregate alkali activity verification model, the whole volume change of concrete which has expansion changes is rapidly, directly and obviously read; deviation caused by the fact that a numerical value is detected by manual operation is reduced, the error generation rate is reduced, the accuracy is improved, and the detection difficulty is reduced; and the transformation of a verification result from a qualitative mode to quantitative mode is realized, and the accuracy of concrete aggregate alkali activity verification is effectively improved.

Description

technical field [0001] The invention relates to the technical field of concrete performance detection, in particular to a concrete aggregate alkali activity verification method and a model thereof. Background technique [0002] In the prior art, there are many methods for determining the alkali activity of concrete sand and gravel aggregates, but the mortar rod rapid method is mainly used. [0003] The "mortar rod rapid method" is recorded in Section 5.4 of "Test Regulations for Hydraulic Concrete Sand and Gravel Aggregate DL / T5151-2014". The potential harmful alkali-silicic acid reaction of materials in mortar is especially suitable for testing aggregates that react slowly or only expand in the later stage; the main principle of gas is to make mortar specimens with aggregates and high-alkali cement Curing at a higher temperature (80°C) promotes the alkali-aggregate reaction, and regularly measures the length change of the cement mortar specimen to identify whether the expa...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/38
CPCG01N33/383
Inventor 饶承彪张细和李勇田小岩王建琦
Owner CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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