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Modifier used for modifying sulphate salty soil

A kind of conditioner, saline soil technology, applied in application, soil conditioning materials, organic fertilizers, etc., can solve the problems of unsatisfactory reinforcement effect, incomplete water glass solidification reaction, insufficient solidified layer strength, etc. The effect of increasing the binding reaction speed, increasing the amount of gel, and increasing the strength

Inactive Publication Date: 2019-04-16
NINGXIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, when the water glass solution is directly injected into the soil for reinforcement at the project site, the curing reaction of the water glass is usually incomplete, the strength of the cured layer is not high enough, the stability is poor, and the slurry is easy to lose, which makes the reinforcement effect not so satisfactory.
In the prior art, there are temperature-modified water glass and potassium silicate composite modified water glass to solidify sulfate saline soil, but the improvement effect is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of improving agent that is used for improving sulfuric acid saline soil, is made by water glass stoste, modifying agent A, modifying agent B according to the ratio that mass ratio is 50:5:2,

[0024] Wherein modifier A adopts following method to make: by weight, 18 parts of zinc nitrate hexahydrate, 7 parts of praseodymium nitrate hexahydrate are added to 110 parts of deionized water, then add 15 parts of sodium metavanadate wherein, After mixing and stirring evenly, after hydrothermal reaction at 130°C for 10 hours, cool to room temperature, centrifuge to obtain a precipitate, wash and dry the precipitate to obtain Modifier A,

[0025] Wherein modifier B adopts following method to make: by weight, after dissolving 13 parts of dysprosium chloride, 10 parts of lanthanum chloride in 220 parts of water, continue to add 25 parts of oleic acid sodium salts wherein, after mixing and stirring , heated to 85°C, heat-insulated for 2 hours, and poured off the upper water l...

Embodiment 2

[0032] A kind of improving agent for improving sulfuric acid saline soil, made of water glass stock solution, modifier A, modifier B according to the ratio of mass ratio of 50:7:5,

[0033] Wherein modifier A adopts following method to make: by weight, 20 parts of zinc nitrate hexahydrate, 8 parts of praseodymium nitrate hexahydrate are added to 120 parts of deionized water, then add 18 parts of sodium metavanadate wherein, After mixing and stirring evenly, after 11 hours of hydrothermal reaction at 135°C, cool to room temperature, centrifuge to obtain a precipitate, wash and dry the precipitate to obtain Modifier A,

[0034] Wherein modifier B adopts following method to make: by weight, after dissolving 16 parts of dysprosium chloride, 15 parts of lanthanum chloride in 230 parts of water, continue to add 28 parts of oleic acid sodium salts wherein, after mixing and stirring , heated to 88°C, and heat-preserved for 2.5 hours. After pouring off the upper water layer, Modifier B...

Embodiment 3

[0041] A kind of improving agent that is used for improving sulfuric acid saline soil, is made by water glass stoste, modifying agent A, modifying agent B according to the ratio that mass ratio is 50:9:7,

[0042] Wherein modifier A adopts the following method to make: by weight, 22 parts of zinc nitrate hexahydrate, 10 parts of praseodymium nitrate hexahydrate are added to 130 parts of deionized water, then add 20 parts of sodium metavanadate wherein, After mixing and stirring evenly, after hydrothermal reaction at 140°C for 12 hours, cool to room temperature, centrifuge to obtain a precipitate, wash and dry the precipitate to obtain Modifier A,

[0043] Wherein modifier B adopts following method to make: by weight, after 19 parts of dysprosium chloride, 17 parts of lanthanum chlorides are dissolved in 250 parts of water, continue to add 30 parts of oleic acid sodium salts wherein, after mixing and stirring , heated at 90°C, kept at a heat preservation place for 3 hours, pour...

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Abstract

The invention discloses a modifier used for modifying sulphate salty soil. The modifier is prepared from a water glass stock solution, a modifying agent A and a modifying agent B in a mass ratio of 50:(5-9):(2-7), wherein the modifying agent A is prepared through the steps that zinc nitrate hexahydrate and praseodymium nitrate hexahydrate are added into deionized water, then sodium metavanadate isadded, all the materials are mixed and stirred to be uniform, after a hydrothermal reaction, cooling is conducted until to the room temperature, sediments are obtained through centrifugation, the sediments are washed and dried to obtain the modifying agent A; the modifying agent B is prepared by using the method including the steps that after dysprosium chloride and lanthanum chloride are dissolved into water, oleic acid sodium salt continues to be added, all the materials are mixed and stirred to be uniform and then heated to 80-90 DEG C, heat is preserved for 2-3 hours, and after the upperwater layer is poured out, the modifying agent B is obtained. By means of the modifier used for modifying the sulphate salty soil, the strength of the sulphate salty soil can be effectively improved,and precipitation of sulfates and corrosion to a project are avoided.

Description

technical field [0001] The invention belongs to the technical field of sulfate saline soil improvement, and in particular relates to an improving agent for improving sulfate saline soil. Background technique [0002] Saline soil refers to the collective name of various salinized and alkalized soils with a certain amount of salt content. In engineering, saline soil is classified as special soil. Compared with non-saline soil, saline soil is special in that its soil composition includes soil particles, water, air and other solids and liquids contained in non-saline soil. In addition to the three phases of gas and gas, it also contains more soluble salts. However, more soluble salts make the engineering properties of saline soil not only related to the three-phase composition of soil, but also affected by soluble salt content, salt composition, temperature, etc., resulting in complex and changeable engineering properties of saline soil. , is specific. Saline soil has the pro...

Claims

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Application Information

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IPC IPC(8): C09K17/40
CPCC09K17/40
Inventor 张卫兵唐莲刘子西王景辉周瑞璞
Owner NINGXIA UNIVERSITY