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High performance cement soil and preparation method thereof

A cement-soil, high-performance technology, applied in the field of high-performance cement-soil and its preparation, to achieve the effect of rich raw materials and stable performance

Inactive Publication Date: 2015-06-10
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the contradiction between the existing cement-soil toughness and strength, the object of the present invention is to provide a kind of high-performance cement-soil and its preparation method, which can be widely used in roadbed engineering, slope protection engineering, foundation reinforcement engineering and other civil engineering, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The specific preparation steps of high-performance cement soil are as follows:

[0032] (1) Put the natural soil material with a pH value of 4-10 in a grassland of Tsinghua University into a rotary dryer, process it at 40°C for 60 minutes, and dry it to obtain dry soil material, which is crushed on a pulverizer Obtain dry and fine natural soil materials through a square hole sieve with an aperture of 5 mm;

[0033] (2) According to the weight ratio of 1:1, mix silk fibers with a diameter of about 20 μm and a length of about 20 mm with nano-silicon powder, put them into an ultrasonic dissociation device for ultrasonic bonding for 10 minutes, take them out and dry them in an oven at 30°C for 60 minutes , to obtain nano silicon powder silk fiber composite material;

[0034] (3) Weigh raw materials according to the following weight percentages: dry fine natural soil material: 70%; ordinary portland cement with a strength grade of 42.5: 20%; nano-silica powder silk fiber co...

Embodiment 2

[0041] The specific preparation steps of high-performance cement soil are as follows:

[0042] (1) Put the natural soil material with a pH value of 4-10 in a grassland of Tsinghua University into a rotary dryer, process it at 50°C for 40 minutes, and dry it to obtain dry soil material. After crushing the dry soil material on a pulverizer Obtain dry and fine natural soil materials through a square hole sieve with an aperture of 5 mm;

[0043](2) According to the weight ratio of 1:3, mix plant leaf fibers with a diameter of about 10 μm and a length of about 30 mm with nano-gypsum, put them into an ultrasonic dissociation device for ultrasonic bonding for 60 minutes, and take them out and dry them in an oven at 40°C for 50 minutes , to obtain nano-gypsum leaf fiber composite material;

[0044] (3) Weigh raw materials according to the following weight percentages: dry fine natural soil material: 75%; ordinary portland cement with a strength grade of 42.5: 17%; nano-gypsum plant l...

Embodiment 3

[0051] The specific preparation steps of high-performance cement soil are as follows:

[0052] (1) Put the natural soil material with a pH value of 4-10 in a grassland of Tsinghua University into a rotary dryer, process it at 60°C for 30 minutes, and dry it to obtain dry soil material. Aperture is a square hole sieve of 5mm to obtain dry and fine natural soil materials;

[0053] (2) Mix flax fibers with a diameter of about 100 μm and a length of about 100 mm with nano-alumina according to a weight ratio of 1:5, put them into an ultrasonic dissociation device for ultrasonic bonding for 180 minutes, and place them in an oven at 70 ° C after taking them out Drying in medium for 40min to prepare nano-aluminum trioxide flax fiber composite material;

[0054] (3) Weigh raw materials according to the following weight percentages: dry fine natural soil material: 70%; ordinary portland cement with a strength grade of 42.5: 25%; nano-alumina flax fiber composite material: 5%;

[0055]...

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Abstract

The invention discloses high performance cement soil and a preparation method thereof, which belongs to the field of civil engineering materials. Natural fibers and nano-materials are used synergistically to improve the performance of cement soil. The preparation method of the high performance cement soil of the invention comprises the following steps: drying, crushing, and sieving natural soil to obtain dry and fine natural soil; performing ultrasonic bonding of natural fibers and nano-materials to prepare a composite material of nano-materials and natural fibers, drying the composite material; adding the dried composite material of nano-materials and natural fibers into the dry and fine natural soil, adding water, uniformly stirring, putting the mixed soil in a wet container; adding cement and water into the mixed soil, and uniformly stirring to obtain the high performance cement soil. The preparation method of the invention greatly improves the toughness and strength of cement soil, and effectively solves the toughness or strength defects of cement soil caused by single addition of additives or fibers, and the prepared high performance cement soil is widely applicable to subgrade engineering, slope protection engineering, ground stabilization engineering and the like.

Description

technical field [0001] The invention relates to the technical field of civil engineering materials, in particular to a high-performance cement soil and a preparation method thereof, in which natural fibers and nanomaterials are effectively bonded by ultrasonic technology, and can act in cement soil similar to ribbed steel bars in concrete It can effectively improve the toughness and strength of cement soil. Background technique [0002] As early as 1915, the United States created the cement soil material for the first time. Due to the advantages of locally sourced materials, low cost, and convenient construction, cement soil has been widely used in the following decades, from a single road construction project to foundation reinforcement in soft soil areas and road slopes. maintenance etc. However, due to the lower strength compared with cement-soil, the wide-scale application of cement-soil is also limited. Some construction projects continue to use concrete materials in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B22/02C04B22/14C04B22/06C04B22/08
Inventor 赵红平冯西桥吴亚明于广云黄慧明
Owner TSINGHUA UNIV
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