Testing device for carbonization resistance of cement based materials and testing method

A technology of cement-based materials and testing devices, which is applied in the direction of analysis materials, preparation of test samples, instruments, etc., to achieve the effect of simple measurement and good carbonation resistance

Active Publication Date: 2010-04-14
CHONGQING UNIV
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  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is: aiming at the shortcomings and deficiencies of the existing concrete anti-carbonation performance test methods, a kind of cement-based material anti-carbonation performance test device and method are provided, and the carbonization experiment is carried out by using the cement-based material clean paste test piece, eliminating the The influence of aggregate (ie stone, sand, steel fiber, etc.) on carbonization has the characteristics of simple method, fast measurement speed, accurate test, scientific and reliable results, etc.

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  • Testing device for carbonization resistance of cement based materials and testing method
  • Testing device for carbonization resistance of cement based materials and testing method
  • Testing device for carbonization resistance of cement based materials and testing method

Examples

Experimental program
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Effect test

Embodiment 1

[0058] like figure 1 As shown in the figure, a test device for the anti-carbonation performance of cement-based materials is composed of a reaction part A, a buffer part B and a gas collection measurement part C, which are communicated with each other through a rubber tube.

[0059]The reaction part A mainly includes a separatory funnel 1, a reaction flask 2, a magnetic stirrer 3 and the like. The separatory funnel 1 is composed of a bucket body, a standard grinding mouth set at the upper end and a funnel neck (ie, a funnel) at the lower end. The bucket body is a spherical glass container with a volume of 30ml; dilute hydrochloric acid is placed in the bucket body, a rubber stopper 9 with a through hole is set at the grinding mouth to seal it, and a glass tube is inserted into the through hole, and the glass tube passes through. The rubber tube communicates with the glass tube inserted into the through hole of the rubber stopper 9 of the bottle mouth of the reaction bottle 2 ...

Embodiment 2

[0094] A test device for the anti-carbonation performance of cement-based materials, the same as in Example 1, wherein: the volume of the separatory funnel 1 is 40ml, and the bucket body is pear-shaped; the reaction flask 2 is a conical flask with a volume of 75ml; the volume of the buffer bottle 6 is 1000ml.

[0095] The concrete steps of a method for testing the anti-carbonation performance of cement-based materials are the same as those in Example 1, wherein: in the preparation of the clean slurry test piece in the (1) step, the water-to-binder ratio is 0.40; in the (2)-2) step During slicing and grinding, the thickness of the slice is 2mm; in the preparation of step (3)-1), the weight of the sliced ​​powder is 0.50g, and the amount of dilute hydrochloric acid is 12ml; the "carbonate content-depth" curve is as follows Figure 4 shown.

Embodiment 3

[0097] A test device for the anti-carbonation performance of cement-based materials, the same as in Embodiment 1, wherein: the volume of the separatory funnel 1 is 50ml; the reaction bottle 2 is a wide-mouth bottle with a volume of 100ml; the volume of the buffer bottle 6 is 1500ml; The glass tube in the through hole of the rubber stopper 9 at the bottle mouth and connected with a glass tube of the glass tee 4 in the through hole of the rubber stopper 9 at the bottle mouth of the buffer bottle 6 through the rubber tube is a straight glass tube.

[0098] The concrete steps of a method for testing the anti-carbonation performance of cement-based materials are the same as those in Example 1, wherein: in the step (1) preparing the pure slurry test piece, the water-to-binder ratio is 0.45; in the step (2)-2) In slicing and grinding, the thickness of the slice is 3; in the preparation of step (3)-1), the weight of the sliced ​​powder is 0.55g, and the amount of dilute hydrochloric ac...

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Abstract

A testing device for carbonization resistance of cement based materials and a testing method belong to the technical field of test of carbonization resistance of concrete. The device mainly comprises a separating funnel, a reaction bottle, a magnetic stirrer and the like of a reaction part, a buffer bottle, a thermometer, a glass tee joint and the like of a buffer part, and a eudiometer and the like of a gas collection measuring part, wherein the eudiometer consists of a meter tube, a balance tube and a drain pipe which are communicated by rubber pipes. By using the device, the method completes the test of carbonization resistance of the cement based material by the following steps: preparing a clean paste test piece, speeding up carbonization and slice treatment, determining the content of carbonate and conducting data processing and result analysis. The invention is characterized by simple method, fast measuring speed, accurate test, scientific and reliable result analysis and the like. The device and the method can be widely applied to the test of carbonization resistance of the cement based materials, and also applicable to the test of the effect of various concrete admixtures, maintaining conditions, carbonization conditions and the like on the carbonization resistance of the cement based materials.

Description

technical field [0001] The invention belongs to the technical field of concrete anti-carbonation performance testing, and particularly relates to a testing device and method for the anti-carbonation performance of cement-based materials composed of cement, mineral admixtures, admixtures and the like. Background technique [0002] Concrete is undoubtedly the most used man-made building material in the world today, and its durability is closely related to the service life and safety of buildings. Therefore, it is very important to study the durability of concrete and its constituent materials. The pH value of the pore solution in the concrete is usually maintained between 12.5 and 13.5. In this highly alkaline environment, a protective film forms on the surface of the rebar, preventing it from being damaged. Due to various reasons such as shrinkage and construction, there are many capillary pores, pores, air bubbles and even defects of different sizes in the concrete. The for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N7/18G01N1/28
Inventor 万朝均张廷雷陈璐圆夏建民张小静王欣黄太忠李腾
Owner CHONGQING UNIV
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