Method for measuring carbonization depth of concrete test piece

A technology for concrete specimens and carbonation depth, which is applied to measuring devices, instruments, and optical devices, etc., can solve the problems of decreased measurement accuracy and inability to measure carbonation depth, and achieve the effect of improving measurement accuracy

Pending Publication Date: 2021-11-02
西安市市政建设工程质量检测有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For the related technologies mentioned above, the inventor believes that, if figure 1 As shown, due to the different sizes of aggregates in concrete, when there are large-sized aggregate particles in the cross-section of the concrete specimen, after dropping the phenolphthalein alcohol solution, when the boundary of the discolored area of ​​the measurement point is just at the aggregate particle When the edge of the edge (such as measuring points 1, 4, 7, 10), the true carbonization depth of this point cannot be measured, resulting in a decrease in measurement accuracy

Method used

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  • Method for measuring carbonization depth of concrete test piece
  • Method for measuring carbonization depth of concrete test piece
  • Method for measuring carbonization depth of concrete test piece

Examples

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Embodiment 1

[0026] A method for measuring the depth of carbonation of a concrete test piece, comprising the following steps:

[0027] S1. Making concrete specimens: Weigh the raw materials according to the ratio of the raw material formula, mix and stir the raw materials to obtain concrete, then sieve the concrete through a sieve with a sieve hole of 9.5mm, discard the sieve, and the sieved The particle size of the aggregate left in the concrete is 0-9.5mm, and then the sieved concrete is added to the standard test mold, and the concrete specimen of 100mm×100mm×100mm is made after waiting for the concrete to harden. The raw material formulation ratio of the concrete specimens is shown in Table 1.

[0028] S2. Curing: Curing the concrete specimens in a standard curing room for 28 days (curing temperature 20°C±2°C, humidity ≥95%); the concrete specimens were taken out of the standard curing room 2 days before carbonization, and then placed at a temperature of 60°C Dry for 48 hours; after d...

Embodiment 2-9

[0032] A method for measuring the depth of carbonation of a concrete test piece. The difference from Example 1 is that the proportion of raw materials for making the concrete test piece in S1 is different. The specific content is shown in Table 1; the measurement results are shown in Table 2.

[0033] Raw material components and proportioning of concrete test piece in table 1 embodiment 1-9

[0034]

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Abstract

The invention discloses a method for measuring the carbonization depth of a concrete test piece, and relates to the technical field of concrete detection. The method for measuring the carbonization depth of the concrete test piece comprises the following steps: preparing concrete according to a raw material formula, then screening out aggregate with the particle size larger than 9.5 mm in the concrete, and preparing the screened concrete into the concrete test piece; and curing and carbonizing the concrete test piece, and then measuring the carbonization depth. The measuring method has the advantage that the measuring precision of the concrete carbonization depth can be improved.

Description

technical field [0001] The application relates to the field of concrete detection technology, more specifically, it relates to a method for measuring the carbonation depth of a concrete specimen. Background technique [0002] Concrete carbonation is a phenomenon in which concrete is subjected to chemical corrosion. CO in the air 2 The process of permeating into concrete and reacting with alkaline substances in concrete to generate carbonate and water, which leads to the reduction of concrete strength, is called concrete carbonation, also known as neutralization. The chemical reaction that occurs during the carbonation of concrete is: Ca(OH) 2 +CO 2 =CaCO 3 +H 2 O. Concrete carbonation is an important factor affecting the compressive strength of concrete. Generally, the compressive strength of concrete specimens is estimated by combining the carbonation depth and the rebound value of concrete. [0003] When measuring the carbonation depth value in the related technolog...

Claims

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Application Information

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IPC IPC(8): G01B11/22
CPCG01B11/22
Inventor 丁纪壮雷燕团王钊张佳生邸凯冯党军王成平吴晓莲张洛吴家兴
Owner 西安市市政建设工程质量检测有限公司
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