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Dolomite magnesium cement concrete and preparation method thereof

A manufacturing method and a technology of magnesium cement, applied in the field of chemical construction, can solve the problems of high cost, difficult to popularize and the like

Inactive Publication Date: 2011-05-11
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Magnesium oxychloride cement concrete cementitious material is an air-hardening material, with its high strength, strong gelling performance, strong durability, good workability, large amount of filler, fast curing, easy maintenance and other characteristics in building materials, construction It is widely used in roads, road construction and other fields. At present, the main raw material for the production of magnesium oxychloride cement (magnesia) is mainly produced in Liaoning, my country. Due to the limitation of resources and regions, the cost of raw materials for the production of magnesium oxychloride cement concrete is relatively high. Not easy to promote

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Experimental program
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Effect test

Embodiment 1

[0005] Embodiment 1: a kind of dolomite magnesium cement concrete manufacture method, get caustic dolomite powder 10.0kg, sand 30kg, fly ash 1.0kg, 1.2kg magnesium chloride is mixed with solution with 4.4kg water, solution and material in mixer Stir evenly, inject the slurry into the formwork or the standard mold and form it under ambient temperature conditions, after demoulding, maintain it at ambient temperature and air relative humidity less than 80% for 28 days to become mortar concrete, and measure its mechanical properties .

[0006] Its main technical indicators are as follows:

[0007] Density grade: 1800kg / m 3 Compressive strength: 41.5MPa Axial compressive strength: 27.1MPa

[0008] Axial tensile strength: 2.42MPa Static compressive modulus of elasticity: 3.12×10 4 MPa

[0009] Splitting tensile strength: 5.92MPa Flexural strength: 8.4MPa

Embodiment 2

[0010] Embodiment 2: a kind of manufacturing method of dolomite magnesium cement concrete, get caustic dolomite powder 10.0kg, sand 1kg, talcum powder 3.0kg, with 6.1kg water 1.9kg magnesium chloride is mixed with solution, solution and material are stirred in mixer Uniform, made into slurry, poured into templates or standard molds and molded under ambient temperature conditions, after demoulding, cured for 28 days under the conditions of ambient temperature and air relative humidity less than 80%, and became mortar concrete, and its mechanical properties were measured.

[0011] Its main technical indicators are as follows:

[0012] Density grade: 1700kg / m 3 Compressive strength: 63.8MPa Axial compressive strength: 28.8MPa Flexural strength: 15.6MPa Axial tensile strength: 2.42MPa Static compressive modulus of elasticity: 3.18×10 4 MPa splitting tensile strength: 9.1MPa

Embodiment 3

[0013] Embodiment 3: a kind of manufacture method of dolomite magnesium cement concrete, get caustic dolomite powder 10.0kg, sand 20kg, stone 60.0kg, fly ash 20kg, 2.4kg magnesium chloride is mixed with solution with 7.6kg water, solution and material are mixed Stir evenly in the feeder, inject the slurry into the standard mold and form it under the condition of ambient temperature. After demoulding, it will be cured for 28 days under the condition of ambient temperature and air relative humidity less than 80%, and it will become sandstone concrete. Measure its mechanical properties performance.

[0014] Its main technical indicators are as follows:

[0015] Density level: 2435kg / m 3 Compressive strength: 41.5MPa Axial compressive strength: 28.5MPa

[0016] Axial tensile strength: 2.45MPa Static compressive modulus of elasticity: 3.31×10 4 MPa

[0017] Splitting tensile strength: 5.9MPa Flexural strength: 8.4MPa

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Abstract

The invention discloses dolomite magnesium cement concrete and a preparation method thereof, belonging to the field of chemical industry buildings. The dolomite magnesium cement concrete is composed of the components of caustic dolomite powder, magnesium chloride, sand, stone, inert filler and water in the mass ratio of 1.00:(0.12-0.29):(0-3.0):(0-6.0):(0.10-0.3):(0.44-0.87). The manufacture method comprises the following steps of stirring slurry, shaping, solidifying and curing. In the manufacture method, caustic dolomite powder with better activity is adopted to prepare the dolomite magnesium cement concrete, and dolomite ore resource is widely distributed and can be obtained conveniently, which lowers production cost of the dolomite magnesium cement concrete and expands the application range of the magnesium cement material. The dolomite magnesium cement concrete prepared by the manufacture method has the characteristics of high intensity, strong gelatinization performance, strong durability, good workability, large filler additive amount, high solidifying speed, easiness of maintenance and the like, belongs to environmentally-friendly building materials and can be widely applied to the building industry.

Description

1. Technical field [0001] The invention relates to a dolomite magnesium cement concrete and a manufacturing method thereof, belonging to the field of chemical construction. 2. Background technology [0002] Magnesium oxychloride cement concrete cementitious material is an air-hardening material, with its high strength, strong gelling performance, strong durability, good workability, large amount of filler, fast curing, easy maintenance and other characteristics in building materials, construction It is widely used in roads, road construction and other fields. At present, the main raw material for the production of magnesium oxychloride cement (magnesia) is mainly produced in Liaoning, my country. Due to the limitation of resources and regions, the cost of raw materials for the production of magnesium oxychloride cement concrete is relatively high. Not easy to promote. 3. Contents of the invention [0003] The present invention is that dolomite ore (it is the ore that calciu...

Claims

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Application Information

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IPC IPC(8): C04B28/30
Inventor 肖学英王继东张全有常成功王永晏孙庆国火焱王惠娟王明英
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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