CN105837073A

CN105837073A - Eolian sand permeation reduction agent, preparation method and application thereof

Info

Publication number: CN105837073A
Application number: CN201610179513.2A
Authority: CN
Inventors: 丁勇; 吕会; 董雪花; 陈梦怡; 刘学敏
Original assignee: Nanjing University of Science and Technology
Current assignee: Nanjing University of Science and Technology
Priority date: 2016-03-25
Filing date: 2016-03-25
Publication date: 2016-08-10
Anticipated expiration: 2036-03-25
Also published as: CN105837073B

Abstract

The invention discloses an eolian sand permeation reduction agent, a preparation method and an application thereof. The permeation decelerating agent includes, by weight, 100 parts of water, 1-5 parts of an adhesive, 0.01-0.05 parts of a water retainer, and 0.1-0.3 parts of a curing agent. The permeation decelerating agent is prepared by successively dissolving the water retainer, the curing agent and the adhesive in water with stirring. When being used, the permeation reduction agent is sprayed onto an eolian sand heap until the permeation reduction agent permeates the sand heap totally and uniformly, and then the eolian sand with the permeation reduction agent is transported to a construction site for filling construction. The permeation reduction agent not only increases water content in the eolian sand but also reduces permeation speed of water in the eolian sand, can resist surface evaporation and can adhere and cure the sand, solves the problem that the eolian sand is difficult to compact, is quick in water permeation and is low in water content, solves a problem of difficult construction of the eolian sand in large canal bank construction, can be applied in large scope and can save labor intensity and time.

Description

A kind of aeolian sand delays penetration enhancer, preparation method and applications

Technical field

The present invention relates to a kind of aeolian sand and delay penetration enhancer and preparation method, and at the large-scale canal dike with aeolian sand as filling material Application in engineering, belongs to aeolian sand fill placement technique field, desert.

Background technology

Aeolian sand is the road-making material that desert area is the abundantest.Up to now, aeolian sand is fresh fills material as large-scale canal dike less Material is applied in large-scale canal dike engineering, and in being primarily due to aeolian sand, moisture can be in the way of infiltration downwards and surface evaporation Scattering and disappearing, paving layer layer of sand is dehydration before upper strata paves, thus dehydration is too fast, it is difficult to meet the compacting of optimum moisture content Requirement, ultimately results in compacting factor and does not reaches requirement, limits the aeolian sand use as filling material.If directly used Aeolian sand does canal dike filling material, and its performance does not reaches requirements required in engineering, such as intensity, permeability, guarantor Caking property etc. between aqueous, sand grains.

At present, carrying out in construction technology at aeolian sand as filling material, Li Gang is by selected optimal compaction mechanical type and incites somebody to action Drift-sand repeatedly sprinkle water the construction technologies such as preparation guarantee construction quality and runtime safety (Li Gang. drift-sand is used as large-scale Channel fills the experimental study of material. Shaanxi water conservancy, and 2015,02:47-48), this kind of method is higher to requiring in mechanical selection. Kong Yukun (Kong Yukun. cement, flyash stablizes the research of Eolian. north traffic, 2007,31 (5): 84-86.) Aeolian sand being mixed water distribution mud fly ash material aeolian sand is reinforced, though obtaining preferable intensity effect, but needing water Mud, flyash stir with aeolian sand, and quantities is big, and the cycle is long, and investment is big, time-consuming.Chinese patent application 01127432.8 discloses a kind of sand-consolidating agent and preparation method thereof, and the sand-consolidating agent of preparation is sprinkling upon sand after needing to mix with sand Surface, stirring workload is big, and simply solidifies sand surface.Therefore, it is necessary to exploitation one raising aeolian sand is aqueous Rate, the seepage velocity that slows down, make aeolian sand reach canal dike to fill the slow penetration enhancer of performance requirement of material each side.

Summary of the invention

It is an object of the invention to provide and a kind of reduce that aeolian sand is leakage and surface evaporation, improve the compactibility of aeolian sand Aeolian sand delay penetration enhancer.Slow penetration enhancer of the present invention refers to the thing of the lower infiltration rate degree effectively slowing down aqueous solution in sand body Matter.The aeolian sand of the present invention delays penetration enhancer and can be sprayed directly on aeolian sand, then aeolian sand is transported to job site and carries out Filling construction, moisture easy to leak in sand when thorough solution aeolian sand does large-scale canal dike filler, moisture content do not reach requirement, It is difficult to the difficult problem in the work progress such as compacting.

To achieve these goals, technical scheme is as follows:

A kind of aeolian sand delays penetration enhancer, and meter by weight consists of the following composition:

Water: 100

Binding agent: 1～5

Water-retaining agent: 0.01～0.05

Firming agent: 0.1～0.3,

Described binding agent is waterglass serosity, and described water-retaining agent is water-soluble high-molecular compound, described firming agent The waste material sodium lignin sulfonate produced for paper-making pulping.

Described water-retaining agent is water-soluble high-molecular compound water-retaining agent general in prior art, can be polyacrylamide Amine, but it is not limited to this.

The effect of described water is to dissolve binding agent, water-retaining agent, firming agent.

The Main Function of described binding agent is the viscosity increasing solution, slows down the water lower infiltration rate degree in sand body, prevents aeolian accumulation It is seeped into layer of sand bottom under moisture is a large amount of in sand and runs off.

The effect of described water-retaining agent is can effectively to suppress moisture to evaporate, and improves the moisture content of aeolian sand, prevents water loss. Owing to this aeolian sand water-retaining property is very poor, construction residing region temperature is high, so moisture easily evaporates lost, and the occluded water time Short, therefore water-retaining agent is an indispensable part.

The Main Function of described firming agent is solidification aeolian sand, improves the cohesive force between sand grains, increases sand body cohesive strength, makes The aeolian sand that viscosity is less assembles the entirety being bonded to have some strength, to bear the vehicular load above canal dike.

Invention further provides above-mentioned aeolian sand and delay the preparation method of penetration enhancer, comprise the following steps: water-retaining agent is added In water, stirring, to being completely dissolved, adds firming agent, and stirring is completely dissolved to firming agent, is eventually adding binding agent, Continue to stir to binding agent uniform dissolution, obtain aeolian sand and delay penetration enhancer.

Further, the present invention also provides for above-mentioned aeolian sand and delays the application of penetration enhancer, and concrete grammar is as follows: sprayed by slow penetration enhancer Spill on aeolian sand sand heap, until slow penetration enhancer the most uniformly penetrates in sand heap, treat that aeolian sand filler virtual resurfacing thickness reaches to want After asking, whether the moisture content of detection aeolian sand reaches construction requirement, if not up to requiring, carries out moisturizing to reaching the institute that constructs The moisture content needed, after moisture content reaches requirement, starts to roll.

Compared with prior art, the aeolian sand of the present invention delay penetration enhancer can improve aeolian sand moisture content while slow down water Leaching rate, reaches canal dike and fills the performance requirement of the aspects such as material water-retaining property, compactibility, leakage resistance, thoroughly solve to make With aeolian sand as moisture easy to leak in sand during large-scale canal dike filler, the difficult problem that is difficult in the work progress such as compacting, it is achieved just Draw materials, and simple to operate, be substantially reduced quantities, save construction cost.

Detailed description of the invention

Below in conjunction with specific embodiment, the present invention is described in further detail.

Embodiment 1

A kind of aeolian sand delays penetration enhancer, the composition of following portions by weight mix:

Water: 100

Sodium silicate: 5

Polyacrylamide: 0.01

Sodium lignin sulfonate: 0.3.

Aeolian sand delays the preparation method of penetration enhancer, comprises the following steps:

By the parts by weight of each component, polyacrylamide is added to the water and is stirred, until during it is completely soluble, Adding sodium lignin sulfonate, continuation stirring is completely dissolved to it and is wherein eventually adding sodium silicate, continues stirring uniform to it Dissolve and form slow penetration enhancer.

The using method of slow penetration enhancer, comprises the following steps:

Aeolian sand is piled sand heap, then the slow penetration enhancer prepared is sprayed on aeolian sand sand heap, until slow osmometer solution is complete Uniformly penetrating in sand heap, after aeolian sand filler virtual resurfacing thickness reaches requirement, whether the moisture content of detection aeolian sand reaches Construction requirement, if not reaching water content requirement, carries out moisturizing to reaching required moisture content of constructing to it, and moisture content reaches After requirement, start to roll.Compacts should not occur that the empty bed of material of leakage pressure, dry and soft material, shearing broken ring material and bright finish etc. are bad existing As, as occurred, above-mentioned phenomenon should be removed.

Embodiment 2

Water: 100

Sodium silicate: 3

Polyacrylamide: 0.02

Sodium lignin sulfonate: 0.1.

Aeolian sand delays the preparation method of penetration enhancer and using method with embodiment 1.

Embodiment 3

Water: 100

Sodium silicate: 1

Polyacrylamide: 0.05

Sodium lignin sulfonate: 0.2.

Embodiment 4

Aeolian sand is piled 40cm sand heap, then the slow penetration enhancer prepared is sprayed on aeolian sand sand heap, until slow vadose solution Liquid the most uniformly penetrates in sand heap, samples at sustained height different parts every 10cm from Sha Dui top, measures every The water content of layer aeolian sand, separately directly to add water as blank, experimental result is as shown in table 1.

Table 1 seepage velocity testing result

As it can be seen from table 1 slow penetration enhancer is sprayed on aeolian sand sand heap compared with directly adding water, spray slow penetration enhancer Under aeolian sand heap, infiltration rate degree slows down, and aeolian sand moisture content improves, and water-retaining property is preferable.

Claims

1. an aeolian sand delays penetration enhancer, it is characterised in that meter by weight consists of the following composition:

Water: 100

Binding agent: 1～5

Water-retaining agent: 0.01～0.05

Firming agent: 0.1～0.3,

A kind of aeolian sand the most according to claim 1 delays penetration enhancer, it is characterised in that described water-retaining agent is polypropylene Amide.

Aeolian sand the most according to claim 1 and 2 delays the preparation method of penetration enhancer, it is characterised in that include following step Rapid: to be added to the water by water-retaining agent, stirring, to being completely dissolved, adds firming agent, and stirring to firming agent is completely dissolved, It is eventually adding binding agent, continues to stir to binding agent uniform dissolution, obtain aeolian sand and delay penetration enhancer.

Aeolian sand the most according to claim 1 and 2 delays the application of penetration enhancer, it is characterised in that concrete grammar is as follows: Slow penetration enhancer is sprayed on aeolian sand sand heap, until slow penetration enhancer the most uniformly penetrates in sand heap, treats that aeolian sand filler void spreads After thickness reaches requirement, whether the moisture content of detection aeolian sand reaches construction requirement, if not up to requiring, carries out moisturizing extremely Reach required moisture content of constructing, after moisture content reaches requirement, start to roll.