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Antifatigue basic magnesium sulfate cement and preparation method thereof

A magnesium sulfate, anti-fatigue technology, applied in the field of cement, can solve the problems of strong basic magnesium sulfate cement preparation method, lack of fatigue resistance, etc., and achieve the effects of improving toughness, increasing strength, and high-pressure folding ratio

Inactive Publication Date: 2015-09-09
周末
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there is a lack of a fatigue-resistant basic magnesium sulfate cement with strong fatigue resistance and a preparation method thereof

Method used

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  • Antifatigue basic magnesium sulfate cement and preparation method thereof
  • Antifatigue basic magnesium sulfate cement and preparation method thereof
  • Antifatigue basic magnesium sulfate cement and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 with figure 2 as shown, figure 1 It is the SEM topography of the microstructure of traditional magnesium oxysulfide cement after 30 days of hydration; figure 2 It is the SEM image of the anti-fatigue basic magnesium sulfate cement 30d of the present invention; the anti-fatigue basic magnesium sulfate cement prepared by industrial raw materials, the hydration product is 5.1.7 whiskers.

[0030] It can be seen that the hydration structure of traditional magnesium oxysulfide cement is mainly composed of a large number of flaky Mg(OH)2 crystals, and the structure is loose and the pores are more. The microstructure of anti-fatigue basic magnesium sulfate cement after hydration is composed of a large number of needle-like 5·1·7 whiskers with relatively uniform spatial distribution, the structure is dense, and there are both Mg(OH)2 gel phase and needles. The rod-shaped 5.1.7 whisker crystals are interwoven into a continuous three-dimensional space struct...

Embodiment 2

[0042] The difference between embodiment 2 and embodiment 1 is:

[0043] A kind of anti-fatigue basic magnesium sulfate cement of the present invention, described anti-fatigue basic magnesium sulfate cement is made up of the component of following mass percentage:

[0044]

[0045] The magnesium oxide is lightly burned dolomite powder. The straw is in powder form, and the powder fineness is 200 mesh.

[0046] Described magnesium oxide is made up of the component of following mass percentage:

[0047]

[0048] The preparation method of the anti-fatigue basic magnesium sulfate cement of the present invention, comprises the steps: (1) take by weighing each component of above-mentioned ratio by proportioning, magnesium oxide 45%, magnesium sulfate heptahydrate 20%, industrial waste slag powder 12%, white slag 9%, mineral admixture 4%, straw 5%, desulfurization gypsum 3%, fly ash 4%, coagulant 1.6%;

[0049] (2) Magnesium sulfate heptahydrate is configured into solution; ...

Embodiment 3

[0052] The difference between embodiment 3 and embodiment 2 is: a kind of anti-fatigue basic magnesium sulfate cement of the present invention, described anti-fatigue basic magnesium sulfate cement is made up of the component of following mass percentage:

[0053]

[0054] The magnesium oxide is a combination of lightly burned magnesite powder and lightly burned dolomite powder. The straw is in powder form, and the powder fineness is 300 mesh.

[0055] Described magnesium oxide is made up of the component of following mass percentage:

[0056]

[0057] The preparation method of the anti-fatigue basic magnesium sulfate cement of the present invention, comprises the steps: (1) take by weighing each component of above-mentioned ratio by proportioning, magnesium oxide 58%, magnesium sulfate heptahydrate 25%, industrial waste slag powder 15%, white slag 13%, mineral admixture 3-5%, straw 6%, desulfurization gypsum 4%, fly ash 5%, coagulant 2%;

[0058] (2) Magnesium sulfate...

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Abstract

The invention discloses an antifatigue basic magnesium sulfate cement which is composed of the following components in percentage by mass: 42-58% of magnesium oxide, 18-25% of magnesium sulfate heptahydrate, 10-15% of industrial waste residue powder, 5-13% of white slag, 3-5% of mineral admixture, 4-6% of straw, 2-4% of desulfurized gypsum, 3-5% of fly ash and 1-2% of thickening time control agent. The appropriate additives are added into the magnesium oxysulfate cement to form a new basic magnesium sulfate phase and generate the antifatigue basic magnesium sulfate cement which has completely different properties and characteristics from the traditional magnesium oxysulfate cement. The main hydration product is high-strength 517 whisker. The antifatigue basic magnesium sulfate cement belongs to novel special cement which has the advantages of whisker self-formation, high strength, high toughness, high folding ration, carbonization resistance, salt resistance, hydrothermal resistance, seawater resistance, impact resistance, fatigue resistance, reinforcing steel rust resistance, high durability and long service life.

Description

【Technical field】 [0001] The invention relates to the field of cement, in particular to an anti-fatigue basic magnesium sulfate cement and a preparation method thereof. 【Background technique】 [0002] Buildings, bridges, roads, airports, tunnels, dams, canals and other engineering structures often suffer from chemical corrosion, freeze-thaw cycles, wear and erosion damage, impact and impact damage, earthquake action, explosion action, etc. during long-term use. For damage phenomena such as surface peeling and structural cracking caused by durability factors or sudden disaster factors, it is an important task in the fields of civil engineering, traffic engineering, hydraulic engineering, etc. Task. At present, in addition to polymer building structural adhesives, common emergency repair materials use a large number of cement repair materials based on inorganic materials. For example, Chinese invention patent application 200510011234.7 discloses a quick-hardening concrete re...

Claims

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Application Information

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IPC IPC(8): C04B9/04
Inventor 周末
Owner 周末
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