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Green ultralight crack-resistant polyvinyl alcohol substrate and preparation method thereof

A technology of polyvinyl alcohol and polyvinyl alcohol powder, used in excavation, infrastructure engineering, construction, etc., can solve the problems of increased slope stability, soil erosion, increased slope load, etc., to reduce permeability and shrinkage properties, preventing soil erosion, and reducing the effect of slope loads

Active Publication Date: 2019-09-24
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Under the condition of sunlight and wind blowing, the vegetation slope protection substrate does not have enough time to form tensile strength to resist the capillary shrinkage force caused by rapid evaporation, which is prone to plastic shrinkage and cracking, which reduces the crack resistance and impermeability of the substrate and durability; moreover, the base material is subjected to rain erosion, which leads to increasingly serious soil erosion and a decline in the survival rate of vegetation, which weakens the erosion resistance of the base material; in addition, the traditional ecological slope protection base material mainly based on cement Large, which increases the load on the slope surface and adds hidden dangers to the stability of the slope; moreover, the traditional ecological slope protection base material is dark in color, and the slope surface is prone to visual fatigue before the vegetation germinates, which affects its external landscape

Method used

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  • Green ultralight crack-resistant polyvinyl alcohol substrate and preparation method thereof
  • Green ultralight crack-resistant polyvinyl alcohol substrate and preparation method thereof
  • Green ultralight crack-resistant polyvinyl alcohol substrate and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] A preparation method for crack-resistant polyvinyl alcohol green ultra-light base material, comprising the following steps:

[0038] (1) Take Wuhan Xunsi River channel silt raw material soil, place it in an oven to dry, pass through a 1mm sieve, and set aside;

[0039] (2) Get 200 g of the raw soil sieved in the step (1), add 30 g of curing agent 42.5 ordinary Portland cement (the mass fraction is 15%, refers to the mass fraction of the raw soil, the same below), mix well ;

[0040] (3) add 140g water (mass fraction is 70%) in the mixture gained in step (2), then stir evenly with the speed of 110r / min in the mixer;

[0041](4) add polyvinyl alcohol powder, PVA fiber, gelling agent, filler, defoamer, wetting agent, preservative and pigment successively in the mixture of step (3) gained by certain dosage proportioning, then in Stir in the mixer at a constant speed of 70r / min for 15 minutes to form a crack-resistant polyvinyl alcohol green ultra-light substrate; the spec...

Embodiment 2

[0043] A preparation method of crack-resistant polyvinyl alcohol green ultra-light substrate, except that no PVA fibers are added in step (4); all the others are the same as in Example 1.

Embodiment 3

[0045] A kind of preparation method of crack-resistant PVA fiber green ultra-light base material, except not adding polyvinyl alcohol powder in step (4); All the other are all the same as embodiment 1.

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Abstract

The invention relates to the technical field of ecological slope protection substrates, and specifically discloses a green ultralight crack-resistant polyvinyl alcohol substrate and a preparation method thereof. The preparation method comprises the following steps: (1) weighing raw material soil, and carrying out drying and sieving for subsequent usage; (2) adding a curing agent into sieved raw material soil, and carrying out uniform mixing; (3) adding water into a mixture obtained in the step (2), and carrying out uniform mixing under stirring; and (4) adding polyvinyl alcohol powder, polyvinyl alcohol fiber, a gelling agent, a filling material, an anti-foaming agent, a wetting agent, a preservative and a pigment into a mixture obtained in the step (3) according to certain addition amounts, and carrying out uniform mixing under stirring. The lightweight material provided by the invention guarantees the strength of a composite soil body to meet the ecological protection requirements of a slope, has the advantages of cracking resistance, impermeability, erosion resistance, ultralight weight, beautiful appearance and the like at the same time, reduces the load of a slope surface, can prevent slope protection plants from dying due to soil loss, provides a green element to the slope surface before vegetation germination, avoids visual fatigue caused by a dark substrate, and enables the slope surface to achieve a landscape effect.

Description

technical field [0001] The invention relates to the technical field of ecological slope protection base materials, in particular to a crack-resistant polyvinyl alcohol green ultra-light base material and a preparation method thereof. Background technique [0002] Under the condition of sunlight and wind blowing, the vegetation slope protection substrate does not have enough time to form tensile strength to resist the capillary shrinkage force caused by rapid evaporation, which is prone to plastic shrinkage and cracking, which reduces the crack resistance and impermeability of the substrate and durability; moreover, the base material is subjected to rain erosion, which leads to increasingly serious soil erosion and a decline in the survival rate of vegetation, which weakens the erosion resistance of the base material; in addition, the traditional ecological slope protection base material mainly based on cement Large, which increases the load on the slope surface and increases...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04E02D17/20C04B111/82C04B111/40C04B111/20C04B111/27
CPCC04B28/04E02D17/205C04B2111/82C04B2111/40C04B2111/27C04B2111/2038C04B24/2623C04B16/0641C04B22/0013C04B14/062C04B24/42C04B18/0436C04B24/02C04B24/16C04B24/40
Inventor 马强付华飞肖衡林黄朝纲刘昭舒杭向俊宸胡斌何俊万娟
Owner HUBEI UNIV OF TECH
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