A kind of low-shrinkage and high-strength aeolian sand subgrade material and its preparation method

A technology of roadbed materials and aeolian sand, which is applied in the field of road engineering materials, can solve the problems of low shrinkage, achieve good water absorption, reduce the number and size of pores, and achieve the effects of strong cohesion

Active Publication Date: 2021-10-29
CCCC WUHAN HARBOR ENG DESIGN & RES +1
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  • Description
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  • Application Information

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Problems solved by technology

However, the above-mentioned SH sand-fixing agent is for new sand-fixing vegetation materials, not for roadbed materials in desert areas. In the extremely dry environment of desert areas, roadbed materials need to have high strength to ensure load-bearing and low shrinkage to prevent road cracks. In contact with wet strata, good water resistance is required to prevent erosion by groundwater, which cannot be met by existing technologies

Method used

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  • A kind of low-shrinkage and high-strength aeolian sand subgrade material and its preparation method
  • A kind of low-shrinkage and high-strength aeolian sand subgrade material and its preparation method
  • A kind of low-shrinkage and high-strength aeolian sand subgrade material and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] As shown in Table 1, low-shrinkage and high-strength aeolian sand subgrade materials include 78 parts by mass of aeolian sand, 7 parts of cement, 1.6 parts of nanomaterials (nano-CaO), 0.2 parts of polyvinyl alcohol, polymer emulsion (30% solid content epoxy emulsion) 0.4 parts, water glass (modulus is 2.5) 0.8 parts, water 12 parts.

Embodiment 2

[0047] As shown in Table 1, low-shrinkage and high-strength aeolian sand subgrade materials include 76 parts by mass of aeolian sand, 7 parts of cement, 2.5 parts of nanomaterials (nano-CaO), 0.1 part of polyvinyl alcohol, polymer emulsion (Epoxy emulsion with 35% solid content) 0.6 part, water glass (modulus is 2.5) 0.8 part, water 13 parts.

Embodiment 3

[0049] As shown in Table 1, low-shrinkage and high-strength aeolian sand subgrade materials include 74 parts by mass of aeolian sand, 8 parts of cement, 2 parts of nanomaterials (nano-CaO), 0.5 parts of polyvinyl alcohol, polymer emulsion (40% solid content epoxy emulsion) 0.5 parts, water glass (modulus is 2.5) 1 part, water 14 parts.

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Abstract

The invention discloses a low-shrinkage and high-strength aeolian sand roadbed material and a preparation method thereof. The material comprises the following components in mass percentage: aeolian sand 74-78%; cement 6-8%; nanometer material 1.5% ~2.5%; polyvinyl alcohol 0.1~0.5%; polymer emulsion 0.2~0.8%; water glass 0.5~1.2%; the balance is water. The aeolian-sand subgrade material prepared by the invention has good waterproof performance while having low shrinkage and high strength, and reduces the influence of water on the stability of the aeolian-sand subgrade, so that the construction technology of aeolian-sand subgrade is widely used in Northwest China. It not only improves the construction quality, but also has good economic and environmental benefits.

Description

technical field [0001] The invention relates to road engineering materials, in particular to a low-shrinkage, high-strength solidified aeolian sand roadbed material and a preparation method thereof. Background technique [0002] my country's desertified land has reached more than 1.7 million square kilometers, accounting for more than 18% of the country's land area, affecting 30 first-level administrative regions, provinces, autonomous regions, and municipalities directly under the central government. The eight major deserts and the four major sandy lands are the main sand sources in my country, and there are sporadic sandy lands along the rivers, rivers, and seas in the south. Subgrade filling materials in desert areas are limited, and aeolian sand is an extremely abundant and highly regional material in Northwest China. The cost of road construction can be greatly reduced. At the same time reduce the environmental pollution caused by aeolian sand. [0003] At present, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/26
CPCC04B28/26C04B2111/0075C04B2201/50C04B7/02C04B14/068C04B14/303C04B14/304C04B22/064C04B24/2623C04B24/281C04B24/26
Inventor 吴克雄李顺凯明阳胡锦轩沈尔卜骆晚玥
Owner CCCC WUHAN HARBOR ENG DESIGN & RES
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