Tester and testing method for high-sensitivity cement thick liquid flowability

A testing device and cement slurry technology, which are applied in the field of high-sensitivity cement slurry fluidity testing devices, can solve problems such as low precision in theoretical research, and achieve high sensitivity, simple device fabrication and testing operations, and strong repeatability. Effect

Inactive Publication Date: 2005-07-27
WUHAN UNIV OF TECH
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  • Abstract
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AI Technical Summary

Problems solved by technology

Existing cement and concrete fluidity test methods or standards bring more inconvenience to theoretical research due to low precision

Method used

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  • Tester and testing method for high-sensitivity cement thick liquid flowability

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Use 32.5P.S cement and naphthalene-based high-efficiency water reducer FDN to prepare cement paste. Each sample uses 500g cement and 2.5g water reducer. Change the amount of water to make the water-cement ratio (weight of water added / weight of cement) from 0.28 to 0.285 , 0.29, 0.295 to 0.30 change slightly, and then use the test device and method of the present invention to test the fluidity of the cement slurry. The steps are:

[0021] 1. According to figure 1 As shown, the leaky cylinder 2 is fixed on the fixture of the bracket 1, and the measuring cylinder 4 is placed on the support platform directly below the leaky cylinder;

[0022] 2. Prepare about 150ml of cement slurry according to GB / T1346-2001, plug the small hole at the bottom of the funnel with the cover 3 and pour the slurry into the funnel, then shake it gently for a few times, and let it rest for 5 seconds to make the air bubbles overflow;

[0023] 3. Pull off the cover, let go of the small hole, and t...

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Abstract

A test device with support is featured as fixing drip barrel on clamp of the support, placing the measuring cylinder on support table and having the two scaled, opening an eyelet at bottom center of drip barrel, using a coverplate to block the eyelet and seeing that the coverplate is able to move out when dripping is required. The size flowability can be evaluated by measuring time of flowing out of drip barrel by certain volume of cement size.

Description

technical field [0001] The invention relates to a high-sensitivity testing device and method for fluidity of cement paste. Background technique [0002] With the development of modern building construction technology, the workability of cement and concrete has been paid more and more attention. As the most important content of workability, fluidity is the most important index in application and research. Many cement and concrete admixtures such as water reducing Admixtures, concrete mineral admixtures, cement mixtures, etc. are required to directly or indirectly meet a certain fluidity index, and use it as a product performance evaluation index. However, the existing cement and concrete fluidity test and evaluation devices and methods have certain limitations, and the outstanding problem is that the test accuracy is not high, which affects the actual evaluation results. [0003] For example, at present, the fluidity is mainly tested and evaluated by three methods: cement pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N11/02G01N11/06
Inventor 马保国朱洪波朱宝林黄新
Owner WUHAN UNIV OF TECH
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