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Pelletized blast furnace slag hydraulicity detection method

A technology for granulating blast furnace slag and a detection method, which is applied in the detection field to achieve the effects of shortening time, speeding up performance and accurate measurement

Inactive Publication Date: 2015-06-24
INNER MONGOLIA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, there is no method for directly measuring the hydraulicity of granulated blast furnace slag, only a method for measuring the activity of fine powder of granulated blast furnace slag, such as my country's national standard "Granulated blast furnace slag powder used in cement and concrete (GB / T 18046 -2008)" gives the determination method of slag powder activity index. This method mainly uses a given standard method to determine the use of granulated blast furnace slag powder as an admixture to replace part of the cement in concrete. The specific method is to use the national standard Cement and standard sand, and use the uniform ratio and curing conditions to make two samples: one is the comparison sample, made of 100% cement; the other is the measurement sample, mixed with 50% cement and 50% Manufactured by granulating blast furnace slag powder; the activity index is expressed as a percentage of the compressive strength of the test sample and the comparison sample

Method used

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  • Pelletized blast furnace slag hydraulicity detection method

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Comparison scheme
Effect test

Embodiment 1

[0018] A method for detecting hydraulicity of granulated blast furnace slag, comprising the steps of:

[0019] The first step: put the granulated blast furnace slag sample to be tested: the sample diameter is 70 mm, and the height is 93 mm, and put it into the container;

[0020] The second step: add calcium hydroxide solution with a pH value of 12, and immerse the granulated blast furnace slag to be tested in the alkaline solution, mix the alkaline solution and the slag evenly by fully stirring, and make the granulated blast furnace slag to be tested dense slag;

[0021] Step 3: Apply a certain constant pressure on the top of the granulated blast furnace slag to be tested for 72 hours, that is, apply a constant pressure of 3kg (converted pressure is 7kPa) on the top of the sample by means of heavy loading, in order to speed up the hydraulicity of the granulated blast furnace slag. , the sample is placed in an environment with a temperature of 80°C for curing, and the curing ...

Embodiment 2

[0023] Embodiment 2: a kind of granulated blast furnace slag hydraulicity detection method, it comprises the following steps:

[0024] Step 1: Put the sample of granulated blast furnace slag to be tested: 70 mm in diameter and 101 mm in height, into a container;

[0025] The second step: adding a sodium hydroxide alkaline solution with a pH value of 11, and immersing the granulated blast furnace slag to be tested in the alkaline solution, mixing the alkaline solution and the slag evenly by fully stirring, and Make the slag to be tested dense;

[0026] Step 3: Apply a certain constant pressure on the top of the granulated blast furnace slag to be tested for 48 hours, that is, apply a constant pressure of 5kg on the top of the sample by means of heavy loading (converted pressure is 13kPa). In order to speed up the hydraulicity of the granulated blast furnace slag, the sample was placed in an environment with a temperature of 60°C for curing, and the curing time was 48 hours;

...

Embodiment 3

[0028] Embodiment 3: a kind of granulated blast furnace slag hydraulicity detection method, it comprises the following steps:

[0029] The first step: put the granulated blast furnace slag sample to be tested: the sample diameter is 70 mm, and the height is 96 mm, and put it into the container;

[0030] The second step: adding the calcium hydroxide alkaline solution with a pH value of 12, immersing the granulated blast furnace slag to be tested in the alkaline solution, mixing the alkaline solution and the slag evenly by fully stirring, and Make the slag to be tested dense;

[0031] Step 3: Apply a certain constant pressure on the top of the granulated blast furnace slag to be tested for 168 hours, that is, apply a constant pressure of 5kg on the top of the sample by means of heavy loading (converted pressure is 13kPa). In order to speed up the hydraulicity of the granulated blast furnace slag, the sample was placed in an environment with a temperature of 40°C for curing, and...

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Abstract

The invention discloses a pelletized blast furnace slag hydraulicity detection method. The pelletized blast furnace slag hydraulicity detection method comprises the following steps: simulating an alkaline environment of concrete by using an alkaline solution to motivate the performance of the hydraulicity of pelletized blast furnace slag; applying pressure to a test sample and increasing a curing temperature; and increasing the performance speed of the hydraulicity of the pelletized blast furnace slag. The hydraulicity of the pelletized blast furnace slag exists, so that a cylinder with certain strength is formed by condensing the pelletized blast furnace slag in the detection method provided by the invention and the activity degree of the hydraulicity of the pelletized blast furnace slag is indirectly determined by determining the compression strength. The pelletized blast furnace slag hydraulicity detection method has the advantages that a concept of determining the hydraulicity of the pelletized blast furnace slag of concrete fine aggregate is provided for the first time; the method for manually simulating the alkaline environment of the concrete to motivate the hydraulicity of the pelletized blast furnace slag is provided; the time for performing the hydraulicity of the pelletized blast furnace slag in the concrete is greatly shortened, and the determination accuracy of the hydraulicity of the pelletized blast furnace slag of the concrete fine aggregate is accurate; and the method is simple and is convenient to operate.

Description

technical field [0001] The invention relates to a detection method, in particular to a detection method for hydraulicity of granulated blast furnace slag. Background technique: [0002] At present, there is no method for directly measuring the hydraulicity of granulated blast furnace slag, only a method for measuring the activity of fine powder of granulated blast furnace slag, such as my country's national standard "Granulated blast furnace slag powder used in cement and concrete (GB / T 18046 -2008)" gives the determination method of slag powder activity index. This method mainly uses a given standard method to determine the use of granulated blast furnace slag powder as an admixture to replace part of the cement in concrete. The specific method is to use the national standard Cement and standard sand, and use the uniform ratio and curing conditions to make two samples: one is the comparison sample, made of 100% cement; the other is the measurement sample, mixed with 50% cemen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08
Inventor 石东升
Owner INNER MONGOLIA UNIV OF TECH
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