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Gypsum modified rammed earth material and preparation method thereof

A gypsum modification technology, which is applied in the field of gypsum modified rammed earth materials and its preparation, can solve the problems of poor crack resistance, poor water erosion resistance, and low compressive strength, and achieve good water erosion resistance, stable performance, Excellent mechanical properties and water erosion resistance

Inactive Publication Date: 2018-12-21
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to use industrial by-product gypsum to modify traditional rammed earth materials in order to solve the problems of low compressive strength, poor crack resistance and poor water erosion resistance of rammed earth walls and rammed earth bricks used in existing urban buildings. , so that it has better performance

Method used

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  • Gypsum modified rammed earth material and preparation method thereof
  • Gypsum modified rammed earth material and preparation method thereof
  • Gypsum modified rammed earth material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: Phosphogypsum modified rammed earth material

[0023] 1. The raw materials are: red soil taken from a certain place in Kunming, Yunnan, and phosphogypsum taken from a phosphate fertilizer factory in Yunnan.

[0024] 2. The matching ratio is as follows:

[0025]

[0026] 3. Its preparation method is as follows: figure 1 As shown, the materials were prepared according to the above mixing ratio, and the phosphogypsum was dried and dehydrated at 170°C for 2 hours.

[0027] 4. Stir the above-mentioned prepared materials evenly and in a moist state.

[0028] 5. Pour the well-stirred mixture into the pre-prepared mold, tamp it layer by layer, smooth the surface, and demould after 2 hours

[0029] 6. Dry the demoulded blocks in a natural state.

[0030] After drying, the compressive strength of No. 1 phosphogypsum modified rammed earth brick can reach 3.7MPa, which can be used for general wall masonry. After drying, the compressive strength of No. 2 phosph...

Embodiment 2

[0031] Example 2: Desulfurization gypsum modified rammed earth material

[0032] 1. The raw materials are: red soil taken from a place in Kunming, Yunnan, and desulfurized gypsum taken from a power plant in Yunnan.

[0033] 2. The matching ratio is as follows:

[0034]

[0035] 3. Prepare materials according to the above mixing ratio, and dry and dehydrate the desulfurized gypsum at 200°C for 2 hours.

[0036] 4. Stir the above-mentioned prepared materials evenly and in a moist state.

[0037] 5. Pour the well-stirred mixture into the pre-prepared mold, tamp it layer by layer, smooth the surface, and demould after 2 hours

[0038] 6. Dry the demoulded blocks in a natural state.

[0039] After drying, the compressive strength of No. 3 desulfurized gypsum modified modified rammed earth brick can reach 4.2MPa, which can be used for general wall masonry. After drying, the compressive strength of No. 4 desulfurized gypsum modified modified rammed earth bricks can reach 3.6Mp...

Embodiment 3

[0040] Example 3: Fiber-free phosphogypsum modified modified rammed earth material

[0041] 1. The raw materials are: red soil taken from a certain place in Kunming, Yunnan, and phosphogypsum taken from a phosphate fertilizer factory in Yunnan.

[0042] 2. The matching ratio is as follows:

[0043]

[0044] 3. Prepare materials according to the above mixing ratio, and dry and dehydrate phosphogypsum at 200°C for 2 hours.

[0045] 4. Stir the above-mentioned prepared materials evenly and in a moist state.

[0046] 5. Pour the well-stirred mixture into the mold prepared in advance, carry out layered compaction, smooth the surface, and demould after 2 hours;

[0047] 6. Dry the demoulded blocks in a natural state.

[0048] After drying, the compressive strength of No. 5 desulfurized gypsum modified rammed earth bricks can reach 2.8MPa, which can be used for general wall masonry.

[0049] After drying, the compressive strength of No. 6 desulfurized gypsum modified rammed ea...

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Abstract

The invention discloses a gypsum modified rammed earth material and a preparation method thereof. According to the material, an industrial by-product gypsum is used for modifying an ordinary immaturesoil material, and the gypsum modified rammed earth material is prepared from 65%-75% of immature soil, 20%-30% of the by-product gypsum and 0%-5% of fibers; 0.5%-1% of modifier is added according tothe mass of the by-product gypsum; 1%-2% of a thickener is added according to the mass of the by-product gypsum. The industrial by-product gypsum and the other components are stirred and mixed after the industrial by-product gypsum is dehydrated, and an appropriate amount of water is added, so that the gypsum modified rammed earth material can be used. The material not only can be directly used for rammed earth wall production, but also can be used for producing a rammed earth brick. The gypsum modified rammed earth material has the advantages of being light in self weight, high in strength, good in heat insulation performance, environmentally friendly, recyclable and the like and achieving simple preparation and construction. The gypsum modified rammed earth material is a wall material suitable for low-rise buildings of villages and small towns, and can replace traditional materials, adobe bricks and the like.

Description

technical field [0001] The invention relates to a gypsum modified rammed earth material and a preparation method thereof, belonging to the technical field of building materials. Background technique [0002] Traditional rammed earth building technology has a long history of application in China. Because rammed earth buildings have the characteristics of local materials, simple construction, warm in winter and cool in summer, and low cost, rammed earth buildings are still widely used in rural housing construction in western China . However, the disadvantages of traditional rammed earth building materials, such as water resistance, low strength, and poor volume stability, severely limit the application of raw earth materials. Therefore, it is necessary to modify traditional rammed earth materials by adding cement or organic curing agents. Contents of the invention [0003] The purpose of the present invention is to use industrial by-product gypsum to modify traditional ram...

Claims

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Application Information

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IPC IPC(8): C04B28/14
CPCC04B28/142C04B28/143C04B28/144C04B2201/50C04B14/42C04B24/06C04B24/383C04B14/361C04B14/46C04B22/16
Inventor 吴磊赵志曼全思臣李丹张毅赵彬宇
Owner KUNMING UNIV OF SCI & TECH
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