WO2019227513A1 - Improved process of acid sulphate soil roadbed filling - Google Patents

Improved process of acid sulphate soil roadbed filling Download PDF

Info

Publication number
WO2019227513A1
WO2019227513A1 PCT/CN2018/089997 CN2018089997W WO2019227513A1 WO 2019227513 A1 WO2019227513 A1 WO 2019227513A1 CN 2018089997 W CN2018089997 W CN 2018089997W WO 2019227513 A1 WO2019227513 A1 WO 2019227513A1
Authority
WO
WIPO (PCT)
Prior art keywords
soil
acid sulfate
acid sulphate
calcium carbonate
filling
Prior art date
Application number
PCT/CN2018/089997
Other languages
French (fr)
Chinese (zh)
Inventor
叶阳升
韩自力
蔡德钩
张千里
陈锋
尧俊凯
王鹏程
闫宏业
李中国
Original Assignee
中国铁道科学研究院铁道建筑研究所
中国铁道科学研究院集团有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中国铁道科学研究院铁道建筑研究所, 中国铁道科学研究院集团有限公司 filed Critical 中国铁道科学研究院铁道建筑研究所
Publication of WO2019227513A1 publication Critical patent/WO2019227513A1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K17/00—Soil-conditioning materials or soil-stabilising materials
    • C09K17/02—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only
    • C09K17/06—Calcium compounds, e.g. lime
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2103/00—Civil engineering use
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2109/00—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE pH regulation

Definitions

  • the invention relates to the field of roadbed engineering, in particular to an acid sulfate special soil soil roadbed filling improvement technology.
  • Acid sulfates are one of them.
  • Acid sulfate soil is a kind of strong obstacle soil in tropical and subtropical coastal delta plains and low latitude coastal zones. Its parent material is a sediment rich in reduced sulfide minerals (mainly iron sulfide), which is widely distributed in Asia and Africa. Latin America is a tropical and subtropical coastal delta region with dense population, developed economy and scarce land resources. Acid sulfate soils have poor natural properties such as high natural water content, high liquid limit, high plasticity, high porosity, low density, and poor compactness, as well as engineering characteristics of difficult drainage and poor water stability.
  • the purpose of the present invention is to provide an improved technology for acid sulfate soil roadbed filler, which solves the problems existing in the prior art.
  • Existing soil improvement technologies mostly use lime or cement for improvement.
  • Lime or cement modified soil has poor environmental stability under acid-sulfate conditions and does not have the engineering characteristics of roadbed filling. Such methods are not suitable for acid sulfate soil improvement.
  • the technical problem to be solved by the present invention is to overcome the shortcomings of the engineering properties of acid sulfate soil, to avoid the secondary harm caused by the erosion of lime or cement modified soil in acid sulfate environment, to eliminate the agglomeration characteristics of acid sulfate soil, and to make it have good
  • the compaction characteristics and strength are suitable for the filling of highway and railway subgrade, and have good economic and practicality.
  • An improved technology for acidic sulfate soil roadbed filler The inorganic binding material calcium carbonate is added to improve the acidic sulfate soil to control the water content of the filler before mixing.
  • the acid sulfate soil can meet compaction and strength requirements, and can be used for roadbed filling.
  • the calcium carbonate powder is used as the modified material, and the particle size of the inorganic compound material calcium carbonate 99.9% is less than 0.075 mm;
  • the target moisture content should be the moisture content that allows the treated soil to reach the maximum strength according to a geotechnical test.
  • An improved process for acid sulfate soil roadbed filler The inorganic binding material calcium carbonate is added to improve the acid sulfate soil.
  • the water content before the filler is mixed is controlled so that the acid sulfate soil can meet the compactness and strength requirements. It can be used for roadbed filling. It includes the following steps:
  • the calcium carbonate powder is used as the modified material, and the particle size of the inorganic compound material calcium carbonate 99.9% is less than 0.075 mm;
  • Natural acid sulfate soils or acid sulfate soils with higher water content are more likely to form clusters, and physical dispersion is difficult, while acid sulfate soil aggregates with lower water content are relatively easier to be physically dispersed than water containing acid sulfate soils with higher water content.
  • the calcium ions in the calcium carbonate improver react with the metal ions contained in the red clay.
  • the reaction of the ions in the interstitial liquid between the soil particles deepens, the agglomeration of the soil particles is weakened, and at the same time, the water in the soil is consumed.
  • the plastic index and water content of the soil are further reduced, the soil body is solidified, the soil body has a higher hardening strength, and the physical properties of the soil body are greatly improved.
  • the pH value of calcium carbonate is 9.5 ⁇ 10.0.
  • calcium carbonate When calcium carbonate is added to acid sulfate soil, calcium carbonate will quickly fill the clay mineral grains and attach to the mineral grains to eliminate the isoelectric pH value of iron sulfide in acid sulfate soil and maintain it. Relatively stable pH environment reduces environmental pollution.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)

Abstract

An improved process of an acid sulphate soil roadbed filling. An inorganic binder calcium carbonate is added to improve an acid sulphate soil and control the moisture content of a filling before blending, such that the acid sulphate soil can reach the requirements for compactness and strength and can be used for roadbed filling. When a road or railroad bed is built in an acid sulphate-rich area, the improved acid sulphate soil is effectively utilized as a roadbed filling, so that earth replacement filling and long-distance transportation and excavated material disposal are avoided to a great extent and earthwork engineering cost is saved.

Description

一种酸性硫酸盐土路基填料改良工艺Improved technology of acid sulfate soil roadbed filler 技术领域Technical field
本发明涉及路基工程领域，具体涉及一种酸性硫酸盐特殊土土路基填料改良技术。The invention relates to the field of roadbed engineering, in particular to an acid sulfate special soil soil roadbed filling improvement technology.
背景技术Background technique
在我国快速发展的建设过程中会遇到各种不同的特殊土类，酸性硫酸盐土(acid sulphate soils，简称ASS)就是其中一种。酸性硫酸盐土是热带、亚热带沿海三角洲平原和低纬度海岸带的一种强障碍性的土壤，其母质为富含还原态硫化物矿物(硫化铁为主)的沉积物，广泛分布于亚洲、非洲、拉丁美洲人口密集、经济发达、土地资源紧缺的热带、亚热带滨海三角洲地区。酸性硫酸盐土因其具有高自然含水量、高液限、高塑性、高孔隙比、密度低、压实性差的不良物理性质和难排水、水稳定性差的工程特性，在酸性硫酸盐土赋存区域的工程中一般设计为弃土，难以用于路基填筑。修建公路、铁路线路时，不可避免地穿越酸性硫酸盐土分布地区，如何趋利避害地利用和处治酸性硫酸盐土，大规模使用酸性硫酸盐土作为路基填料，在现阶段是一个难点问题。In the process of rapid development in China, various special soils will be encountered. Acid sulfates (acid sulfates) are one of them. Acid sulfate soil is a kind of strong obstacle soil in tropical and subtropical coastal delta plains and low latitude coastal zones. Its parent material is a sediment rich in reduced sulfide minerals (mainly iron sulfide), which is widely distributed in Asia and Africa. Latin America is a tropical and subtropical coastal delta region with dense population, developed economy and scarce land resources. Acid sulfate soils have poor natural properties such as high natural water content, high liquid limit, high plasticity, high porosity, low density, and poor compactness, as well as engineering characteristics of difficult drainage and poor water stability. They are found in acid sulfate soils. The project is generally designed as spoil, which is difficult to use for subgrade filling. When constructing highway and railway lines, it is inevitable to cross the area where acid sulfate soils are distributed. How to use and treat acid sulfate soils favorably and harmlessly, and use acid sulfate soils as roadbed fillers on a large scale is a difficult problem at this stage.
发明内容Summary of the Invention
本发明的目的是提供一种酸性硫酸盐土路基填料改良技术，解决了现有技术中存在的问题。现有改良土技术多使用石灰或水泥进行改良。石灰或水泥改良土在酸性-硫酸盐条件下环境稳定性差，不具备填筑路基的工程特性，此类方法不适用于酸性硫酸盐土改良。本发明 所要解决的技术问题是克服酸性硫酸盐土工程性质的缺点，避免石灰或水泥改良土在酸性硫酸盐环境中侵蚀带来的二次危害，消除酸性硫酸盐土的聚团特性，使其具有良好的压实特性和强度，适于公路、铁路路基的填筑，经济实用性好。具体技术方案如下：The purpose of the present invention is to provide an improved technology for acid sulfate soil roadbed filler, which solves the problems existing in the prior art. Existing soil improvement technologies mostly use lime or cement for improvement. Lime or cement modified soil has poor environmental stability under acid-sulfate conditions and does not have the engineering characteristics of roadbed filling. Such methods are not suitable for acid sulfate soil improvement. The technical problem to be solved by the present invention is to overcome the shortcomings of the engineering properties of acid sulfate soil, to avoid the secondary harm caused by the erosion of lime or cement modified soil in acid sulfate environment, to eliminate the agglomeration characteristics of acid sulfate soil, and to make it have good The compaction characteristics and strength are suitable for the filling of highway and railway subgrade, and have good economic and practicality. The specific technical solutions are as follows:
一种酸性硫酸盐土路基填料改良工艺,添加无机结合材料碳酸钙对酸性硫酸盐土进行改良，控制填料拌和前含水率。使酸性硫酸盐土能达到压实度、强度要求，可用于路基填筑。An improved technology for acidic sulfate soil roadbed filler. The inorganic binding material calcium carbonate is added to improve the acidic sulfate soil to control the water content of the filler before mixing. The acid sulfate soil can meet compaction and strength requirements, and can be used for roadbed filling.
进一步地，包括如下步骤：Further, it includes the following steps:
1)采用碳酸钙粉末为改性材料，无机化合物材料碳酸钙99.9％的颗粒粒径＜0.075mm；1) The calcium carbonate powder is used as the modified material, and the particle size of the inorganic compound material calcium carbonate 99.9% is less than 0.075 mm;
2)将天然酸性硫酸盐土平摊于室外不透水帆布上，捣碎摊平翻晒风干，使天然含水率由14％～30％降至4％左右，均匀掺入10％碳酸钠粉末，土体颜色由原深红、红棕色、红褐色明显变浅，拌匀后再加水配置至目标含水率，密封闷料24h以上。所述目标含水率，应为根据土工试验，使处理后的土达到最大强度的含水率。2) Spread the natural acid sulfate soil on the outdoor water-tight canvas, mash it, flatten it, and air dry it to reduce the natural moisture content from 14% to 30% to about 4%. Add 10% sodium carbonate powder evenly to the soil. The color is obviously lighter from the original dark red, reddish brown, and reddish brown. After mixing, add water to configure the target moisture content, and seal the stuffing for more than 24 hours. The target moisture content should be the moisture content that allows the treated soil to reach the maximum strength according to a geotechnical test.
采用本发明，能够达到以下技术效果：With the present invention, the following technical effects can be achieved:
在酸性硫酸盐富存地区修建公路、铁路路基时，有效利用改良酸性硫酸盐土作为路基填料，较大限度的避免了借方换填和远运弃渣，节约了土石方工程费用，具有良好经济实用价值。In the construction of highway and railway subgrades in areas rich in acid sulfate, the improved use of acid sulfate soil as a roadbed filler is effectively used, which largely avoids borrowing for replacement and long-distance transport of slag, which saves the cost of earth and stone engineering, and has good economic and practical value. .
具体实施方式Detailed ways
下面结合具体实施方式对本发明进行详细说明。但不应将此理解 为本发明上述主题的范围仅限于以下的实施例，凡基于本发明内容所实现的技术均属于本发明的范围。The present invention is described in detail below in conjunction with specific embodiments. However, it should not be understood that the scope of the above-mentioned subject matter of the present invention is limited to the following embodiments, and any technology implemented based on the content of the present invention belongs to the scope of the present invention.
一种酸性硫酸盐土路基填料改良工艺,添加无机结合材料碳酸钙对酸性硫酸盐土进行改良，控制填料拌和前含水率，使酸性硫酸盐土能达到压实度、强度要求，可用于路基填筑。包括如下步骤：An improved process for acid sulfate soil roadbed filler. The inorganic binding material calcium carbonate is added to improve the acid sulfate soil. The water content before the filler is mixed is controlled so that the acid sulfate soil can meet the compactness and strength requirements. It can be used for roadbed filling. It includes the following steps:
1)采用碳酸钙粉末为改性材料，无机化合物材料碳酸钙99.9％的颗粒粒径＜0.075mm；1) The calcium carbonate powder is used as the modified material, and the particle size of the inorganic compound material calcium carbonate 99.9% is less than 0.075 mm;
2)将天然酸性硫酸盐土平摊于室外不透水帆布上，捣碎摊平翻晒风干，使天然含水率由14％～30％降至4％左右，均匀掺入10％碳酸钠粉末，土体颜色由原深红、红棕色、红褐色明显变浅，拌匀后再加水配置至最优含水率，密封闷料24h以上。2) Spread the natural acid sulfate soil on the outdoor water-tight canvas, mash it, flatten it, and air dry it to reduce the natural moisture content from 14% to 30% to about 4%. Add 10% sodium carbonate powder evenly to the soil. The color is obviously lighter from the original dark red, reddish brown, and reddish brown. After mixing, add water to configure the optimal moisture content, and seal the stuffing for more than 24 hours.
天然酸性硫酸盐土或含水率较高的酸性硫酸盐土较易成团，物理分散困难，而含水率较低的酸性硫酸盐土团聚体比天然或含水率高的酸性硫酸盐土相对容易被物理分散，含水率越低酸性硫酸盐土被物理分散后的团粒粒径越小，且相对易与改性材料均匀搅拌。Natural acid sulfate soils or acid sulfate soils with higher water content are more likely to form clusters, and physical dispersion is difficult, while acid sulfate soil aggregates with lower water content are relatively easier to be physically dispersed than water containing acid sulfate soils with higher water content. The lower the rate, the smaller the particle size of the acid sulfate soil after being physically dispersed, and relatively easy to uniformly stir with the modified material.
碳酸钙改良剂中电解的钙离子与红粘土中所含的金属离子反应，当土体颗粒间空隙液体中离子的反应深入时，土粒的团聚作用被弱化，同时消耗土体中的水分，从而进一步降低土的塑性指数及含水量，固化土体，使土体具有较高的硬化强度，大幅改善土体的物理性能。The calcium ions in the calcium carbonate improver react with the metal ions contained in the red clay. When the reaction of the ions in the interstitial liquid between the soil particles deepens, the agglomeration of the soil particles is weakened, and at the same time, the water in the soil is consumed. Thus, the plastic index and water content of the soil are further reduced, the soil body is solidified, the soil body has a higher hardening strength, and the physical properties of the soil body are greatly improved.
碳酸钙的PH值为9.5～10.0，向酸性硫酸盐土中加入碳酸钙时，碳酸钙会迅速充满黏土矿物团粒间，附在矿物团粒上，消除酸性硫酸盐土中硫化铁的等电PH值，保持相对稳定的PH值环境，减小对环境 污染。The pH value of calcium carbonate is 9.5 ～ 10.0. When calcium carbonate is added to acid sulfate soil, calcium carbonate will quickly fill the clay mineral grains and attach to the mineral grains to eliminate the isoelectric pH value of iron sulfide in acid sulfate soil and maintain it. Relatively stable pH environment reduces environmental pollution.
当掺料比较小时，土黏粒与胶凝物质可发挥较大作用，在垂直应力作用下无侧限抗压强度增强，当掺料比增大时单位体积内“碳酸钙膜”变厚，黏粒与胶凝物质发挥的作用受到抑制，无侧限抗压强度随之减弱。三种不同酸性硫酸盐土无侧限抗压强度试验表明，掺料比为10％时无侧限抗压强度最大。When the admixture is relatively small, soil clay particles and gelling substances can play a greater role, and the unconfined compressive strength is enhanced under the action of vertical stress. When the admixture ratio is increased, the "calcium carbonate film" becomes thicker per unit volume. The role of clay and gelling substances is suppressed, and the unconfined compressive strength is weakened. The unconfined compressive strength test of three different acid sulfate soils showed that the unconfined compressive strength was the highest when the admixture ratio was 10%.
本发明并不局限于前述的具体实施方式。本发明扩展到任何在本说明书中披露的新特征或任何新的组合，以及披露的任一新的方法或过程的步骤或任何新的组合。不能以此限定本发明实施的范围，故其等同组件的置换，或依本发明专利保护范围所作的等同变化与修改，皆应仍属本发明权利要求书涵盖之范畴。The invention is not limited to the foregoing specific embodiments. The invention extends to any new feature or any new combination disclosed in this specification, and to any new method or process step or any new combination disclosed. The scope of implementation of the present invention cannot be limited in this way, so the replacement of equivalent components, or equivalent changes and modifications made in accordance with the scope of patent protection of the present invention should still fall within the scope of the claims of the present invention.

Claims (2)

  1. 一种酸性硫酸盐土路基填料改良工艺,其特征在于，添加无机结合材料碳酸钙对酸性硫酸盐土进行改良，控制填料拌和前含水率。The invention relates to an acid sulfate soil roadbed filling improvement technology, which is characterized in that an inorganic binding material calcium carbonate is added to improve the acid sulfate soil, and the water content of the filler is controlled before mixing.
  2. 如权利要求1所述的酸性硫酸盐土路基填料改良工艺,其特征在于，包括如下步骤：The method for improving acidic sulfate soil roadbed filler according to claim 1, further comprising the following steps:
    1)采用碳酸钙粉末为改性材料，无机化合物材料碳酸钙99.9％的颗粒粒径＜0.075mm；1) The calcium carbonate powder is used as the modified material, and the particle size of the inorganic compound material calcium carbonate 99.9% is less than 0.075 mm;
    2)将天然酸性硫酸盐土平摊于室外不透水帆布上，捣碎摊平翻晒风干，使天然含水率由14％～30％降至4％左右，均匀掺入10％碳酸钠粉末，土体颜色明显变浅，拌匀后再加水配置至目标含水率，密封闷料24h以上。2) Spread the natural acid sulfate soil on the outdoor water-tight canvas, mash it, flatten it, and air dry it to reduce the natural moisture content from 14% to 30% to about 4%. Add 10% sodium carbonate powder evenly to the soil. The color is obviously lighter. After mixing, add water to the target moisture content and seal the stuffing for more than 24 hours.
PCT/CN2018/089997 2018-05-31 2018-06-05 Improved process of acid sulphate soil roadbed filling WO2019227513A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201810555648.3A CN109054839B (en) 2018-05-31 2018-05-31 Improvement process of acidic sulfate soil roadbed filler
CN201810555648.3 2018-05-31

Publications (1)

Publication Number Publication Date
WO2019227513A1 true WO2019227513A1 (en) 2019-12-05

Family

ID=64819839

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/089997 WO2019227513A1 (en) 2018-05-31 2018-06-05 Improved process of acid sulphate soil roadbed filling

Country Status (2)

Country Link
CN (1) CN109054839B (en)
WO (1) WO2019227513A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113277812B (en) * 2021-05-06 2023-01-31 新疆交通规划勘察设计研究院有限公司 Rock salt base layer mixture, preparation method and application
CN113403901B (en) * 2021-05-22 2022-09-09 山东高速工程建设集团有限公司 Cement modified soil roadbed filling process

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007161838A (en) * 2005-12-13 2007-06-28 Ube Material Industries Ltd Soil solidifier
CN104232099A (en) * 2014-05-30 2014-12-24 昆明绿色中迅生物有限公司 Modifier for acidic soil
CN104946259A (en) * 2015-05-22 2015-09-30 上海宝冶钢渣综合开发实业有限公司 Acidic soil improver
CN105038809A (en) * 2015-08-17 2015-11-11 福建省农业科学院土壤肥料研究所 Multifunctional acid soil conditioner and application method thereof
CN105295930A (en) * 2014-07-21 2016-02-03 山西云大中天环境科技有限公司 Acid soil conditioner and preparation method thereof

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11209907A (en) * 1998-01-28 1999-08-03 Takashi Suzuki Paving material and road paving method
CN100347269C (en) * 2005-09-30 2007-11-07 清华大学 Soil curing agent suitable for salinized soil
CN101041576A (en) * 2007-03-06 2007-09-26 天津市乐金建材制品有限公司 Calcium-enriched alta-mud for railway and high road foundation treatment
CN101275394A (en) * 2008-04-28 2008-10-01 北京航空航天大学 Curing method for saline soil
CN101289850B (en) * 2008-06-03 2010-06-16 凌贤长 Saline soil curing agent and technical applications thereof
CN101838985A (en) * 2010-05-19 2010-09-22 东南大学 Method for improving over-wet cohesive soil by using curing agent
CN103243625A (en) * 2013-05-14 2013-08-14 中铁二十一局集团第四工程有限公司 Construction method for salty soil district railway roadbed with water content higher than liquid limit
CN103306178B (en) * 2013-06-04 2015-11-18 北京航空航天大学 A kind of road foundation of cementing ultra-sulphate stain soil, basic unit, subbase
CN106316281A (en) * 2016-08-05 2017-01-11 轩重建筑节能科技（上海）有限公司 New material for reinforcing saline soil roadbed
CN106587864A (en) * 2016-12-19 2017-04-26 中国神华能源股份有限公司 Improved roadbed filler and preparation method thereof
CN107739613A (en) * 2017-11-16 2018-02-27 中国铁路设计集团有限公司 A kind of soil composite modifying agent of frost heaving resistant

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007161838A (en) * 2005-12-13 2007-06-28 Ube Material Industries Ltd Soil solidifier
CN104232099A (en) * 2014-05-30 2014-12-24 昆明绿色中迅生物有限公司 Modifier for acidic soil
CN105295930A (en) * 2014-07-21 2016-02-03 山西云大中天环境科技有限公司 Acid soil conditioner and preparation method thereof
CN104946259A (en) * 2015-05-22 2015-09-30 上海宝冶钢渣综合开发实业有限公司 Acidic soil improver
CN105038809A (en) * 2015-08-17 2015-11-11 福建省农业科学院土壤肥料研究所 Multifunctional acid soil conditioner and application method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CUI, XIAOLONG ET AL.: "Urban Green Space Soil and Its Management", 31 January 2001 (2001-01-31), pages 245 and 247 *

Also Published As

Publication number Publication date
CN109054839A (en) 2018-12-21
CN109054839B (en) 2020-08-04

Similar Documents

Publication Publication Date Title
CN110304884B (en) Cement phosphogypsum stabilized macadam material for road base and preparation method and application thereof
CN101906304B (en) Soil curing agent and using method thereof
CN102060428A (en) Silt curing agent and preparation method thereof
CN109626928B (en) Composite curing agent suitable for peat soil and preparation method thereof
CN101941828B (en) Slurry curing agent
CN106927864A (en) A kind of light foam concrete filled for road and bridge and preparation method thereof
CN105152519A (en) Inorganic silt curing agent and preparation method thereof as well as road material
CN107117916A (en) A kind of powder soil solidification additive for roadbase
CN105218023A (en) A kind of drift-sand foam material and preparation method
CN107245338B (en) Composite preparation for repairing and improving soil structure and preparation method thereof
CN102162241A (en) A method of improving swelling soil roadbed filling material by using waste carbide slag
CN108821682A (en) A kind of low cost alternate resources high crack-resisting and its preparation method
CN103342527A (en) Waste concrete reclaimed tunnel back lining grouting material and preparation method thereof
WO2019227513A1 (en) Improved process of acid sulphate soil roadbed filling
CN113754364A (en) Artificial aggregate based on muck sand washing tail mud and preparation method thereof
CN108996971A (en) A kind of preparation method of road basement material
CN111170663A (en) Sea mud curing agent
Puppala et al. Soil modification by admixtures: concepts and field applications
CN112794682A (en) Premixed fluid solidified soil doped with high-silicon type iron tailings and preparation method thereof
CN111943571B (en) High-strength waterproof salinized silt curing agent and curing method
CN106587887A (en) Subgrade subbase material prepared from cured mill tailings and tail clay and preparation method thereof
KR100881149B1 (en) High water content dredging mud solidification stabilizer and it's improved soil production method
CN113277813A (en) Composite curing agent for high liquid limit soil and use method and application thereof
CN103834413A (en) Powdery soil curing agent for curing road base course and subbase course
CN113003991A (en) Gold tailing roadbed filling material and preparation method and application thereof

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18920588

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 02.02.2021)

122 Ep: pct application non-entry in european phase

Ref document number: 18920588

Country of ref document: EP

Kind code of ref document: A1