Bending-resistant basic magnesium sulfate cement and preparation method thereof

A technology of magnesium sulfate and magnesium sulfate heptahydrate, which is applied in the field of cement, can solve the problems such as the lack of preparation methods for basic magnesium sulfate cement, and achieve the effects of improving toughness, high-pressure folding ratio, and increasing strength

Inactive Publication Date: 2015-09-16
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 bending-resistant ba

Method used

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  • Bending-resistant basic magnesium sulfate cement and preparation method thereof
  • Bending-resistant basic magnesium sulfate cement and preparation method thereof
  • Bending-resistant basic magnesium sulfate cement and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A kind of anti-bending basic magnesium sulfate cement of the present invention, described anti-bending basic magnesium sulfate cement is made up of the component of following mass percentage:

[0032]

[0033] The magnesium oxide refers to the magnesium oxide powder material made from calcined magnesite.

[0034] The magnesium oxide is lightly burned magnesite powder; the straw is in powder form, and the powder fineness is 100 mesh.

[0035] Described magnesium oxide is made up of the component of following mass percentage:

[0036]

[0037] The magnesium oxide is calcined and ground at a temperature of 750°C to obtain powder from magnesite, the fineness of the powder is 200-300 mesh, and the sieve rate is 6%.

[0038] The preparation method of the anti-bending basic magnesium sulfate cement of the present invention comprises the steps: (1) taking by weighing each component of the above-mentioned ratio by proportioning, magnesium oxide 40%, magnesium sulfate hept...

Embodiment 2

[0051] The difference between embodiment 2 and embodiment 1 is: a kind of anti-bending basic magnesium sulfate cement of the present invention, described anti-bending basic magnesium sulfate cement is made up of the component of following mass percentage:

[0052]

[0053] The magnesia refers to a combination of two kinds of magnesia powder materials produced by calcining magnesite and by-product magnesia powder materials produced during the process of extracting lithium carbonate from salt lake brine.

[0054] The magnesium oxide is lightly burned dolomite powder. The straw is in powder form, and the powder fineness is 200 mesh.

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

[0056]

[0057] The magnesium oxide is calcined and ground at a temperature of 780° C. to obtain powder from magnesite, the fineness of the powder is 260 mesh, and the sieve rate is 6%.

[0058] The preparation method of the anti-bending basic magnes...

Embodiment 3

[0060] The difference between embodiment 3 and embodiment 1 is: a kind of anti-bending basic magnesium sulfate cement of the present invention, described anti-bending basic magnesium sulfate cement is made up of the component of following mass percentage:

[0061]

[0062] The magnesium oxide refers to the by-product magnesium oxide powder material produced during the process of extracting lithium carbonate from salt lake brine made from calcined magnesite.

[0063] 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.

[0064] Described magnesium oxide is made up of the component of following mass percentage:

[0065]

[0066] The magnesium oxide is calcined and ground at a temperature of 850° C. to obtain powder from magnesite. The fineness of the powder is 300 mesh, and the sieve rate is 6%.

[0067] The preparation method of the anti-bending basic...

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Abstract

The invention discloses a bending-resistant basic magnesium sulfate cement. The cement is composed of the components of, by mass, 40-55% of magnesium oxide, 20-25% of magnesium sulphate heptahydrate, 10-20% of industrial waste powder, 5-9% of white slag, 3-8% of a mineral admixture, 2-5% of desulfurization gypsum, 2-4% of straw, and 1-3% of a coagulation adjustment agent. According to the invention, appropriate additives are added into magnesium oxysulfate cement, such that a novel basic magnesium sulfate phase is formed, and the bending-resistant basic magnesium sulfate cement with performances and characteristics completely different than those of the traditional magnesium oxysulfate cement is produced. A main hydration product of the basic magnesium sulfate cement is high-strength 517 whiskers. The cement is a novel special cement with the advantages of whisker self-formation, high toughness, high compressive-bending strength ratio, carbonization resistance, bittern resistance, hydrothermal resistance, seawater resistance, impact resistance, fatigue resistance, carbonization resistance, steel bar corrosionresistance, high durability, and long service life.

Description

【Technical field】 [0001] The invention relates to the field of cement, in particular to a bending-resistant 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. [0003] Both magnesium oxysulfide cement and magnesium oxychloride cement can be called magnesium c...

Claims

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Application Information

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IPC IPC(8): C04B9/11
Inventor 周末
Owner 周末
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