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Concrete slurry reological performance universal test method

A technology of rheological properties and test methods, applied in the field of concrete, can solve the problems of unsuitable working degree of high-fluidity concrete, redundancy of multi-parameter information, poor inter-comparability of test values, etc., and achieves short test time and simple and fast operation. , the effect of small error of test value

Active Publication Date: 2010-05-12
NINGBO UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are certain limitations. The biggest problem is that the test values ​​are not comparable, the operation is not easy enough, the material consumption is large, the cleaning workload after each test is very large, and there are multiple methods that have redundant information on multiple parameters.
Therefore, it is not suitable for evaluating the workability of high fluidity concrete in the laboratory or especially in the construction site.

Method used

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  • Concrete slurry reological performance universal test method
  • Concrete slurry reological performance universal test method
  • Concrete slurry reological performance universal test method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Example 1: A certain tunnel joint concrete is required to have non-vibrating self-compacting performance, and two initially selected cements CEM II and CEM I need to be optimized. Measure the GP value separately with different volumetric water-cement ratios, and you can get a curve cluster, the test results are shown in image 3 , obviously, the more to the right of the curve indicates that the greater water consumption is required to obtain the same degree of fluidity. Therefore, the cement selected in this test is CEM II, obviously the latter requires less water.

Embodiment 2

[0062] Example 2: Admixtures have been preliminarily selected for the box girder concrete of a sea-crossing bridge, and the compatibility between cement and admixtures needs to be investigated.

[0063] The compatibility of cement and admixture mainly examines three aspects of rheological behavior of cement slurry. The first is the effect of the amount of admixture on the improvement of the fluidity of the selected cement slurry ( Figure 4 ); then the saturated dosage of the admixture to the cement ( Figure 4 ); Finally, it is the loss of static pulp fluidity over time. Through the comparison of multiple pictures, the admixture selected in this experiment is FM38.

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Abstract

The invention relates to a concrete slurry rheological behavior general testing method and the testing device. The main feature of the device is that it includes four parts: measuring cylinder sharp hopper, thin measuring cup, test stand, and desk top timer or setting automatic timing system. It uses computer analysis and estimating the different concrete fine stuff, compounding fine stuff mixingadaptability and slurry rheological behavior. The invention supplies a general testing method that has simple device and is convenience to operate. The test has the advantages of rapid, little waste material, low labor intensity and high using efficiency of the test result.

Description

technical field [0001] The invention relates to a general test method for rheological properties of concrete slurry, which belongs to the technical field of concrete. It is suitable for selecting concrete raw materials and optimizing the computer mix ratio, preparing high-performance concrete, self-compacting concrete and superfluid concrete, especially for concrete mix ratio design with workability and durability as the main indicators. Background technique [0002] With the improvement of the performance of high-efficiency water reducers, it is no longer difficult to prepare high-performance concrete, self-compacting concrete and superfluid concrete. However, the higher the fluidity, the greater the tendency of the concrete to segregate. Therefore, the connotation of high workability of concrete has been expanded, including the following three basic properties: high fluidity, high stability, and high penetration. [0003] Fresh concrete is a special solid-liquid mixed ph...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N11/06G01N33/38G01N1/28
Inventor 干伟忠汉斯·帕斯门苏月燕
Owner NINGBO UNIVERSITY OF TECHNOLOGY
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