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Prepn of water-reducing and surface halide accumulation resisting modifier for magnesite binding material

A cementitious material and anti-halogenation technology, which is applied in the field of magnesite cementitious material modifier, can solve the problems of large reduction in strength, reduced product strength, and impact on product performance.

Inactive Publication Date: 2002-02-27
SHANDONG PROVINCIAL ACAD OF BUILDING RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the surface of this material product is easy to absorb moisture and return to halogen, and it is more serious under high temperature and high humidity conditions, which seriously affects the performance of the product.
In order to overcome this defect, people have carried out a large number of experiments, and some adopt the technical scheme of replacing magnesium chloride solution with magnesium sulfate solution. Although this scheme can overcome the above-mentioned defects, the strength of the product is greatly reduced, and the desired effect cannot be achieved. ; There is also a technical scheme of immersing the product that has just been removed from the film in water, so that the C1 - precipitation, this technical solution still has the defect of reducing the strength of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The percentage by weight that each raw material accounts for in the total weight is:

[0015] 20% water, 12% phenol, 8% sodium benzenesulfonate, 10% industrial formaldehyde, 50% silicone water repellent.

[0016] Add the above raw materials into the reaction kettle and stir for 180 minutes under the condition of 80°C.

Embodiment 2

[0018] The percentage by weight that each raw material accounts for in the total weight is:

[0019] 18% water, 14% phenol, 10% sodium benzenesulfonate, 12% industrial formaldehyde, 46% silicone water repellent.

[0020] Add the above raw materials into the reaction kettle and stir for 200 minutes under the condition of 85°C.

Embodiment 3

[0022] The percentage by weight that each raw material accounts for in the total weight is:

[0023] 22% water, 10% phenol, 6% sodium benzenesulfonate, 8% industrial formaldehyde, 54% silicone water repellent.

[0024] Add the above raw materials into the reaction kettle and stir for 150 minutes under the condition of 90°C.

[0025] Among the above-mentioned embodiments, wherein embodiment 1 is the best embodiment.

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Abstract

The water-reducing anti-bleeding modifying agent of magnesite cementing material is made up by using (wt%) water 18-22%, phenol 10-14%, sodium sulfophenylate 6-10%, industrial formaldehyde 8-12% and organic silicon water-resisting agent. It can be added to the magnesite cement, and can raise the resistance to absorb moisture and anti-bleeding property of its product, and also can raise the product strength.

Description

technical field [0001] The invention relates to a magnesite gelling material modifier, in particular to a preparation method of a magnesite gelling material water-reducing and anti-halogenation modifier. Background technique [0002] Magnesite cement, also known as magnesite cement, is a kind of air-hardening cement. When using this material to manufacture products, it has the characteristics of no need for moisture maintenance, fast strength growth, flexural resistance, high compressive strength, weak alkali Non-toxic, low corrosion, high elasticity, good toughness, light weight, good adhesion to organic and inorganic materials or fibers, etc., widely used in construction, decoration, urban construction, agriculture and other fields. However, because the surface of this material product is easy to absorb moisture and return to halogen, and it is more serious under high temperature and high humidity conditions, it seriously affects the performance of the product. In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/40C04B28/30
Inventor 王自福曹永敏张兴福殷晓梅常维峰李天勋黄鲁征
Owner SHANDONG PROVINCIAL ACAD OF BUILDING RES
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