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Cement coagulant and preparation method thereof

A coagulant and cement technology, applied in the field of cement admixtures, can solve problems such as inability to effectively prolong the service life of concrete components and ensure project quality, and achieve the effects of coagulation and enhancement, low alkali content, and obvious effects.

Inactive Publication Date: 2013-07-10
NANJING YONGNENG MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It cannot effectively extend the service life of concrete components to ensure the quality of the project; it is not suitable for cement mixed with slag, phosphorus slag, and steel slag

Method used

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  • Cement coagulant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1: A cement accelerator, the composition is as follows:

[0012] 20-30% aluminum sulfate hydrate,

[0013] Triethanolamine 1-5%,

[0014] Ethylene glycol 5-10%,

[0015] The balance is water, and the total amount is 100%.

[0016] The preparation method of the cement coagulant accelerator includes the following steps: inject water into the reaction kettle according to the formula ratio, add hydrated aluminum sulfate while stirring, stir for 15 minutes, add triethanolamine and ethylene glycol according to the formula ratio and stir for 10 minutes. After filtering impurities through 150 mesh stainless steel, the cement accelerator product is obtained.

Embodiment 2 to Embodiment 4

[0018] Repeat the method of Experimental Example 1 according to the content of each component specified in Table 1 below to obtain cement accelerator products with different component content:

[0019] Table 1

[0020] Component

Example 1

Example 2

Example 3

Example 4

Aluminum sulfate hydrate (%)

20

23

27

30

Triethanolamine(%)

5

3

1

3

Ethylene glycol (%)

10

9

5

7

Water (%)

65

65

67

60

Get

Product 1

Product 2

Product 3

Product 4

[0021] The cement accelerator products 1 to 4 prepared in Example 1 to Example 4 were used in the mixed materials for comparative experiments, where the mixing ratio was: 54% clinker, 5% desulfurized gypsum, limestone 6%, slag 20%, steel slag 20%. The experimental results are shown in Table 2:

[0022] Table 2

[0023]

[0024] It can be seen that the cement coagulant provided and prepared by the present invention has the following advantages: water reduction: under the same mixing ratio and slump conditions, the water reduction rate ...

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Abstract

The invention discloses a cement coagulant and a preparation method thereof. The cement coagulant comprises the following components in percentage by mass: 20-30 percent of aluminum sulfate hydrate, 1-5 percent of triethanolamine, 5-10 percent of glycol and the balance of water in terms of 100 percent in total. The cement coagulant is low in alkalinity, no chloride ion etching, strong anti-permeability and stable durability, is beneficial to prolonging the service life of a concrete member and ensuring the engineering quality and has a remarkable coagulating and reinforcing effect on cement doped with mineral slag, phosphorus slag and steel slag.

Description

Technical field [0001] The invention relates to a cement accelerator and a preparation method thereof, and belongs to the technical field of cement admixtures. Background technique [0002] At present, the main coagulant accelerators in China are all inorganic salts. The main component of most coagulant accelerators is sodium aluminate. Other inorganic salts with coagulant effect include sodium carbonate, calcium aluminate, calcium chlorochlorate, and fluorosilicic acid. Magnesium, sodium silicate, sodium fluorosilicate, ferrous chloride, aluminum sulfate and aluminum trichloride, etc. Organic substances that can be used as quick-setting agents are triethanolamine and soluble resins such as polyacrylic acid, polymethacrylic acid, hydroxy acrylic acid, and calcium acrylate. [0003] Inorganic salt accelerators cause certain corrosion to reinforced concrete, posing a threat to engineering quality and safety. [0004] The existing accelerators have a high alkali content and the chlori...

Claims

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Application Information

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IPC IPC(8): C04B24/12
Inventor 刘国华唐慧慧
Owner NANJING YONGNENG MATERIALS
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