JP3527477B2 - Soil hardening agent - Google Patents
Soil hardening agentInfo
- Publication number
- JP3527477B2 JP3527477B2 JP2001050139A JP2001050139A JP3527477B2 JP 3527477 B2 JP3527477 B2 JP 3527477B2 JP 2001050139 A JP2001050139 A JP 2001050139A JP 2001050139 A JP2001050139 A JP 2001050139A JP 3527477 B2 JP3527477 B2 JP 3527477B2
- Authority
- JP
- Japan
- Prior art keywords
- soil
- solidifying agent
- weight
- soil solidifying
- magnesium oxide
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Lifetime
Links
Description
【０００１】[0001]
【発明の属する技術分野】 本発明は、例えばシールド
工法、地中連続壁工法、浚渫工法、表層および深層地盤
改良工法、宅地造成工事等の建設現場からの発生土のよ
うな土壌を植物の生育に支障のないｐＨ範囲で固化させ
るために使用される土壌固化剤に関するものである。該
土壌固化剤によって固化された土壌はしたがって土壌材
料としてリサイクル可能である。TECHNICAL FIELD The present invention relates to plant growth of soil such as soil generated from a construction site such as a shield construction method, an underground continuous wall construction method, a dredging construction method, a surface and deep ground improvement construction method, and a residential land development work. The present invention relates to a soil solidifying agent used for solidifying in a pH range that does not affect the soil. The soil solidified by the soil solidifying agent can therefore be recycled as soil material.
【０００２】[0002]
【発明の背景】 上記建設現場からの発生土のような土
壌は水分を多量に含み流動性があり、そのまゝでは運
搬、輸送が困難である。そこで該土壌には土壌固化剤を
添加して固化させた上で運搬、輸送行なう方法が採られ
ている。BACKGROUND OF THE INVENTION Soil such as soil generated from the above construction site contains a large amount of water and is fluid, and it is difficult to carry and transport it until that time. Therefore, a method has been adopted in which a soil solidifying agent is added to the soil to solidify it, and then the soil is transported and transported.
【０００３】[0003]
【従来の技術】 従来、この種の土壌固化剤としては、
セメント系固化剤、生石灰系固化剤、石膏系固化剤や有
機高分子系凝集剤や吸水性樹脂等が使用されている。Conventionally, as a soil solidifying agent of this kind,
Cement-based solidifying agents, quicklime-based solidifying agents, gypsum-based solidifying agents, organic polymer-based flocculants, water-absorbent resins, etc. are used.
【０００４】[0004]
【発明が解決しようとする課題】 上記セメント系固化
剤や生石灰系固化剤は、土壌に対して通常１０〜１５重
量％添加するが、このような添加量では処理土のｐＨが
１２以上になりアルカリ公害を惹き起こす。また運搬、
輸送が可能な程度に固化するまでに長時間を要すると言
う問題点もある。更に上記石膏系固化剤ではアルカリ公
害のおそれはなく、また処理土は短時間で固化するが、
水に接触すると固化剤が溶解して処理土が崩壊してしま
い、また多量に水分を含む土壌の場合には固化不良を起
こすおそれがあるので、多量に添加する必要がある。ま
た更に上記有機高分子系凝集剤や吸水性樹脂でもアルカ
リ公害のおそれはなく、また固化時間は早いが、処理土
は耐水性がなく、水に接触すると処理土が崩壊してしま
い、また水分を多量に含む土壌の場合には該有機高分子
系凝集剤や吸水性樹脂の添加量が多くなり、処理土が弾
性体となって、重機類で突崩したり搬出したりする作業
が困難になる。The above cement-based solidifying agent or quicklime-based solidifying agent is usually added in an amount of 10 to 15% by weight with respect to the soil, but with such an addition amount, the pH of the treated soil becomes 12 or more. Causes alkaline pollution. Transport again,
There is also a problem that it takes a long time to solidify to the extent that it can be transported. Furthermore, there is no danger of alkali pollution with the gypsum-based solidifying agent, and the treated soil solidifies in a short time,
When contacted with water, the solidifying agent dissolves and the treated soil collapses, and in the case of soil containing a large amount of water, poor solidification may occur, so it is necessary to add a large amount. Furthermore, there is no danger of alkali pollution even with the organic polymer-based coagulant or water absorbent resin, and the solidification time is short, but the treated soil does not have water resistance, and the treated soil will collapse when contacted with water, In the case of soil containing a large amount of soil, the amount of the organic polymer-based coagulant or water-absorbent resin added increases, and the treated soil becomes an elastic body, making it difficult to dismount or carry it out with heavy machinery. Become.
【０００５】[0005]
【課題を解決するための手段】 本発明はこのような建
設現場からの発生土のような土壌を短時間で運搬、輸送
が可能な程度に固化させることを課題とするものであ
り、上記課題を解決するための手段として、土壌固化剤
中に酸化マグネシウムおよび／または酸化マグネシウム
含有物Ａを酸化マグネシウムとして４〜５０重量％、高
炉スラグＢを１〜２０重量％含み、ＡとＢとの混合物に
対して燐酸成分Ｃを燐酸換算で０．５〜５０重量％添加
した土壌固化剤を提供するものである。該土壌固化剤中
には更に硫酸カルシウムが５〜５０重量％含有されてい
ることが望ましく、該土壌固化剤中には更にｐＨ調整を
目的として酸性剤が５〜１００重量％含有されているこ
とが望ましい。また更に該土壌固化剤中には更に有機高
分子凝集剤および／または吸水性樹脂が０．１〜５．０
重量％含有されていることが望ましい。Means for Solving the Problems The present invention has an object to solidify soil such as soil generated from such a construction site to such an extent that it can be transported and transported in a short time. as a means for solving the soil solidifying agent
4-50 wt% magnesium oxide and / or magnesium oxide-containing substance A as magnesium oxide in the high <br/> furnace slag B include one to 20 wt%, phosphoric acid formed on the mixture of A and B The present invention provides a soil solidifying agent containing 0.5 to 50% by weight of component C in terms of phosphoric acid. In the soil solidifying agent
Additional calcium sulfate in has not been contained 5-50 wt%
That it is desirable, and this <br/> acidic agent for the purpose of further to pH adjustment in the soil solidifying agent is contained 5 to 100 wt% is desirable. Or even in the soil solidifying agent further organic polymeric flocculant and / or the water absorbent resins is 0. 1 to 5.0
It is desirable that the weight percent containing Yes.
【０００６】[0006]
【発明の実施の形態】 本発明に使用される酸化マグネ
シウムおよび／または酸化マグネシウム含有物Ａの酸化
マグネシウムには、低温焼成品と高温焼成品とがある
が、反応性の点からみて低温焼成品（仮焼マグネシア）
の使用が望ましい。また本発明では仮焼ドロマイトやド
ロマイトプラスターのような酸化マグネシウムを含むも
のも使用出来る。仮焼ドロマイトはドロマイト（炭酸カ
ルシウムと炭酸マグネシウムの複塩で理論値として炭酸
カルシウム５４．２７％、炭酸マグネシウム４５．７３
％の割合で含有）を７００〜１０００℃で焼成し炭酸マ
グネシウムを酸化マグネシウムとし、一部の炭酸カルシ
ウムを酸化カルシウムとしたものである。ドロマイトプ
ラスターは仮焼ドロマイトを水と反応消化させた水酸化
ドロマイトを微粉砕し整粒したものであり、粉末化に問
題のある仮焼ドロマイトよりも望ましい酸化マグネシウ
ム含有物である。BEST MODE FOR CARRYING OUT THE INVENTION
There are low-temperature calcined products and high-temperature calcined products for magnesium oxide of the sium and / or magnesium oxide-containing material A, but from the viewpoint of reactivity, low-temperature calcined products (calcined magnesia)
Use of is preferred. Further, in the present invention, those containing magnesium oxide such as calcined dolomite and dolomite plaster can be used. The calcined dolomite is dolomite (a double salt of calcium carbonate and magnesium carbonate, which has theoretical values of 54.27% calcium carbonate and 45.73 magnesium carbonate).
%) Was burned at 700 to 1000 ° C. to convert magnesium carbonate to magnesium oxide and part of calcium carbonate to calcium oxide. The dolomite plaster is obtained by finely pulverizing and sizing hydroxide dolomite obtained by reacting and digesting calcined dolomite with water, and is a magnesium oxide-containing substance more preferable than calcined dolomite having a problem in pulverization.
【０００７】 本発明に使用される高炉スラグＢとして
は、高炉スラグセメントに使用されるグレードの高炉水
砕スラグが望ましい。[0007] In the blast furnace slag B used in the present invention, blast furnace slag grades used for blast furnace slag cement is desired.
【０００８】 本発明で使用される燐酸成分Ｃとしては
燐酸および燐酸ナトリウム、燐酸カリウム、燐酸アンモ
ニウム等の燐酸塩類があるが、水溶性で水溶液のｐＨが
酸性を示す第一燐酸ナトリウム、第一燐酸カリウム、第
一燐酸アンモニウム、酸性ピロリン酸ナトリウム、酸性
ヘキサメタリン酸ナトリウムが望ましい。更に可溶性燐
酸を含む過リン酸石灰、重過リン酸石灰等も使用出来
る。[0008] phosphate and sodium phosphate are the phosphate Ingredient C for use in the present invention, potassium phosphate, there are phosphates such as ammonium phosphate, primary phosphate, sodium showing pH of the aqueous solution in the water-soluble acidic, Potassium monophosphate, ammonium monophosphate, sodium acid pyrophosphate, and sodium acid hexametaphosphate are preferable. Further, lime superphosphate containing soluble phosphoric acid, lime superphosphate and the like can also be used.
【０００９】 本発明では該固化剤を添加混合した処理
土壌を短時間で搬出したい場合、土壌の取扱作業上支障
の無い流動化しない強度を出すために硫酸カルシウム
（石膏）を添加しても良い、上記石膏には無水石膏、半
水石膏、２水石膏があるが、自体が短時間で硬化する半
水石膏の使用が望ましい。In the present invention, when it is desired to carry out the treated soil to which the solidifying agent is added and mixed in a short time, calcium sulfate (gypsum) may be added in order to obtain a strength that does not fluidize and does not hinder the handling of the soil. The above-mentioned gypsum includes anhydrous gypsum, hemihydrate gypsum and dihydrate gypsum, but it is preferable to use hemihydrate gypsum, which itself hardens in a short time.
【００１０】 本発明では処理土のｐＨを調整するため
に酸性剤を使用してもよい。該酸性剤としては、例えば
粉末硫酸、硼酸、スルファミン酸等の粉末状の無機酸あ
るいは蓚酸、クエン酸、リンゴ酸、ベンゼンスルホン酸
等の粉末状の有機酸、硫酸アルミニウム、ポリ塩化アル
ミニウム、硫酸アンモニウム、塩化アンモニウム、硫酸
第１鉄、塩化第２鉄、ベンゼンスルホン酸アンモニウム
等の強酸と弱塩基との粉末状の塩等が使用される。特に
硫酸第１鉄、塩化第２鉄、硫酸アルミニウム、硫酸アン
モニウム、ポリ塩化アルミニウム等は本発明の土壌固化
剤の固化能力に影響を与えることなく、硬化を助強する
ので望ましい酸性剤である。In the present invention, an acid agent may be used to adjust the pH of the treated soil. Examples of the acidic agent include powdered inorganic acids such as powdered sulfuric acid, boric acid and sulfamic acid or powdered organic acids such as oxalic acid, citric acid, malic acid and benzenesulfonic acid, aluminum sulfate, polyaluminum chloride and ammonium sulfate. Powdery salts of strong acids and weak bases such as ammonium chloride, ferrous sulfate, ferric chloride and ammonium benzenesulfonate are used. In particular, ferrous sulfate, ferric chloride, aluminum sulfate, ammonium sulfate, polyaluminum chloride and the like are desirable acidic agents because they accelerate hardening without affecting the solidifying ability of the soil solidifying agent of the present invention.
【００１１】 処理対象土壌の含水比が例えば１００％
以上の高含水の場合には、土壌中のフリー水分を吸収し
て処理対象土壌の固化強度の向上や土壌固化剤の添加量
を減らすために、有機高分子凝集剤および／または吸水
性樹脂が使用される。上記有機高分子凝集剤としては、
例えばポリアクリル酸ソーダ、ポリアクリルアミド、ア
クリル酸ソーダ−アクリルアミド共重合体、ポリエチレ
ンオキサイド等があり、上記吸水性樹脂としては例えば
ポリアクリル酸、ポリアクリル酸ソーダ、ポリアクリル
アミド等がある。The water content of the treated soil is, for example, 100%
In the case of high water content above, an organic polymer flocculant and / or a water absorbent resin is used in order to absorb the free water in the soil to improve the solidification strength of the treated soil and to reduce the addition amount of the soil solidifying agent. used. As the organic polymer flocculant,
For example, there are polyacrylic acid soda, polyacrylamide, sodium acrylate-acrylamide copolymer, polyethylene oxide and the like, and examples of the water absorbent resin include polyacrylic acid, sodium polyacrylate and polyacrylamide.
【００１２】 上記成分においては、酸化マグネシウム
と高炉スラグと燐酸成分と土壌との固化反応によって土
壌が固化せしめられるが、更に硫酸カルシウムを添加す
れば上記固化反応における固化時間を短縮することが出
来る。また酸性剤によって土壌のｐＨを植物の生育に支
障のないｐＨ範囲、即ちｐＨ１０以下、望ましくはｐＨ
５〜９、更に望ましくはｐＨ５．８〜８．６に調節す
る。また水分を多量に含有する土壌の場合には、上記成
分に加えて上記有機高分子凝集剤および／または吸水性
樹脂を添加すると、土壌が凝縮して土壌中のフリーの水
が排除され、あるいは土壌中の水が吸収され、望ましい
強度の土壌固化物が得られる。In the above-mentioned components, the soil is solidified by the solidification reaction of magnesium oxide, blast furnace slag, phosphoric acid component and soil, and the addition of calcium sulfate can shorten the solidification time in the solidification reaction. In addition, the pH of the soil is adjusted to a pH range that does not hinder the growth of plants by using an acid agent, that is, a pH of 10 or less, preferably pH.
The pH is adjusted to 5 to 9, more preferably 5.8 to 8.6. Further, in the case of soil containing a large amount of water, by adding the organic polymer flocculant and / or the water absorbent resin in addition to the above components, the soil is condensed and free water in the soil is eliminated, or The water in the soil is absorbed and the soil solidified product of desired strength is obtained.
【００１３】 上記成分の添加量は本発明の土壌固化剤
中、酸化マグネシウムおよび／または酸化マグネシウム
含有物Ａは、酸化マグネシウム換算で４〜５０重量％、
高炉スラグＢは１〜２０重量％、燐酸成分Ｃは上記酸化
マグネシウムおよび／または酸化マグネシウム含有物と
高炉スラグとの混合物（Ａ＋Ｂ）に対して燐酸換算で
０．５〜５０重量％、望ましく１〜２０重量％、硫酸カ
ルシウムを添加する場合には、該土壌固化剤中に５〜５
０重量％、酸性剤を添加する場合には、該土壌固化剤中
に５〜１００重量％であり、該酸性剤は土壌のｐＨに応
じて添加量を調節すべきであることは言うまでもない。
また有機高分子凝集剤および／または吸水性樹脂を添加
する場合には、上記土壌固化剤中に０．１〜５．０重量
％の範囲で添加されるが、この添加量は土壌の水分含有
量に応じて調節される。上記土壌固化剤において、土壌
中に無機質が有機質に対して多量に含まれている場合に
は、酸化マグネシウムの量を減らし、高炉スラグの量を
多くし、逆に有機質が無機質に対して多量に含まれてい
る場合には、酸化マグネシウムの量を増やし、高炉スラ
グの量を減らす。In the soil solidifying agent of the present invention, the addition amount of the above-mentioned components is 4 to 50% by weight of magnesium oxide and / or magnesium oxide-containing material A in terms of magnesium oxide,
Blast furnace slag B is 1 to 20 wt%, 0.5 to 50 wt% with phosphate Ingredient C is the magnesium oxide and / or a mixture of magnesium oxide inclusions and blast furnace slag (A + B) in phosphate conversion for, Desirably 1 to 20% by weight, when adding calcium sulfate, 5 to 5 in the soil solidifying agent.
In the case of adding 0% by weight of the acidifying agent, 5 to 100% by weight is added to the soil solidifying agent, and it goes without saying that the amount of the acidifying agent should be adjusted according to the pH of the soil.
When an organic polymer flocculant and / or a water absorbent resin is added, it is added to the soil solidifying agent in the range of 0.1 to 5.0% by weight. Adjusted according to quantity. In the soil solidifying agent, when the soil contains a large amount of minerals with respect to the organic matter, the amount of magnesium oxide is reduced, the amount of blast furnace slag is increased, and conversely, the amount of the organic matter relative to the inorganic matter is increased. If included, increase the amount of magnesium oxide and decrease the amount of blast furnace slag.
【００１４】 本発明の土壌固化剤は土壌に添加する前
に全成分を混合し、その後土壌に添加されてもよいし、
また各成分を個々に土壌に添加されてもよいし、更に成
分のうちの二種以上をあらかじめ混合しておいて土壌に
添加されてもよい。The soil-solidifying agent of the present invention may be added to the soil after mixing all components before adding to the soil,
Further, each component may be added individually to the soil, or two or more of the components may be mixed in advance and added to the soil.
【００１５】 本発明の土壌固化剤の土壌に対する添加
量は、土質、含水量等によって調節される。一般に有機
質を多く含む土質の場合には添加量は少なくして良く、
また有機質の少ない土質の場合には添加量は多くする。
更に含水量の大きい土壌の場合は添加量は多くし、含水
量の小さい土壌の場合には添加量は少なくする。一般的
に言えば含水比１００％以下の土壌の場合には、本発明
の土壌固化剤は土壌１ｍ3 当たり３０〜１００kg程度添
加され、含水比１００〜４００％の土壌の場合には、本
発明の土壌固化剤は土壌１ｍ3 当たり５０〜２５０kg程
度添加される。The amount of the soil solidifying agent of the present invention added to soil is adjusted depending on the soil quality, water content, and the like. Generally, in the case of soil containing a lot of organic matter, the addition amount may be small,
Also, in the case of soil with little organic matter, the addition amount is increased.
Further, the addition amount is increased in the case of soil having a high water content, and the addition amount is decreased in the case of soil having a low water content. Generally speaking, in the case of soil having a water content of 100% or less, the soil solidifying agent of the present invention is added in an amount of about 30 to 100 kg per 1 m 3 of soil, and in the case of a soil having a water content of 100 to 400%, the present invention is used. The soil solidifying agent is added in an amount of about 50 to 250 kg per 1 m 3 of soil.
【００１６】〔実施例１〕
地下鉄工事現場から発生した粘土質砂質土壌（含水比８
４．８％、含土率５４．１％、密度１．５０２ｇ／ｃｍ
3 、細粒分４８．９％、強熱減量８．２％、土壌ｐＨ
６．２）１ｍ3 に下記組成の固化剤を１００kg添加し攪
拌混合し供試体とし、強度測定の経時変化の結果を表１
に示す。
固化剤の組成
スラグ ５８．８重量％
ドロマイトプラスター ２９．４重量％
燐酸 １１．８重量％[Example 1] Clay sandy soil generated from a subway construction site (water content 8
4.8%, soil content 54.1%, density 1.502 g / cm
3 , fine grain content 48.9%, loss on ignition 8.2%, soil pH
6.2) 100 kg of the solidifying agent having the following composition was added to 1 m 3, and the mixture was stirred and mixed to obtain a test sample.
Shown in. Composition of solidifying agent Slag 58.8% by weight Dolomite plaster 29.4% by weight Phosphoric acid 11.8% by weight
【００１７】〔実施例２〕
下水道工事現場から発生した低液性シルト質土壌（含水
比４６．９％、含土率６８．０％、密度１．６８６ｇ／
ｃｍ3 、細粒分１００％、強熱減量４．４％、土壌ｐＨ
７．６）１ｍ3 に下記組成の固化剤を１００kg添加し攪
拌混合し供試体とし、強度測定の経時変化の結果を表１
に示す。
固化剤の組成
スラグ ５８．８重量％
酸化マグネシウム １７．７重量％
重過リン酸石灰 ２３．５重量％Example 2 Low-liquid silty soil generated from a sewer construction site (water content ratio 46.9%, soil content 68.0%, density 1.686 g /
cm 3 , fine grain 100%, loss on ignition 4.4%, soil pH
7.6) 100 kg of the solidifying agent having the following composition is added to 1 m 3 and the mixture is stirred and mixed to obtain a test piece.
Shown in. Composition of the solidifying agent Slag 58.8% by weight Magnesium oxide 17.7% by weight Calcium superphosphate 23.5% by weight
【００１８】〔実施例３〕
宅造工事現場から発生した高液性シルト質土壌（含水比
５０．７％、含土率６６．４％、密度１．７２７ｇ／ｃ
ｍ3 、細粒分９１．６％、強熱減量６．６％、土壌ｐＨ
６．３）１ｍ3 に下記組成の固化剤を８０kg添加し攪拌
混合し供試体とし、強度測定の経時変化の結果を表１に
示す。
固化剤の組成
スラグ ５０ 重量％
ドロマイトプラスター ２５ 重量％
重過リン酸石灰 ２５ 重量％Example 3 Highly liquid silty soil generated from a home construction site (water content 50.7%, soil content 66.4%, density 1.727 g / c)
m 3 , fine grain content 91.6%, loss on ignition 6.6%, soil pH
6.3) 80 kg of the solidifying agent having the following composition was added to 1 m 3 and mixed by stirring to give a test sample. The results of changes in strength measurement over time are shown in Table 1. Composition of solidifying agent Slag 50% by weight Dolomite plaster 25% by weight Hypercalcium phosphate 25% by weight
【００１９】〔実施例４〕
河川工事現場から発生した有機質粘土（含水比１９１．
１％、含土率３４．４％、密度１．２６５ｇ／ｃｍ3 、
細粒分８２．６％、強熱減量２２．８％、土壌ｐＨ６．
１）１ｍ3 に下記組成の固化剤を１２０kg添加し攪拌混
合し供試体とし、強度測定の経時変化の結果を表１に示
す。
固化剤の組成
酸化マグネシウム ４３．３重量％
スラグ １３ 重量％
重過リン酸石灰 ２５．９重量％
ポリ塩化アルミニウム ８．７ 重量％
硫酸カルシウム ８．７ 重量％
高分子凝集剤 ０．４ 重量％Example 4 Organic clay (moisture content ratio 191.
1%, soil content 34.4%, density 1.265 g / cm 3 ,
Fine grain content 82.6%, loss on ignition 22.8%, soil pH 6.
1) 120 kg of a solidifying agent having the following composition was added to 1 m 3, and the mixture was stirred and mixed to obtain a test sample. Table 1 shows the results of changes over time in strength measurement. Composition of solidifying agent Magnesium oxide 43.3% by weight Slag 13% by weight Laminium superphosphate 25.9% by weight Polyaluminum chloride 8.7% by weight Calcium sulfate 8.7% by weight Polymeric flocculant 0.4% by weight
【００２０】〔比較例１〕
実施例４の土壌１ｍ3 に普通ポルトランドセメント１２
０kg添加し攪拌混合し供試体とし、強度測定の経時変化
の結果を表１に示す。COMPARATIVE EXAMPLE 1 Normal Portland cement 12 was added to 1 m 3 of the soil of Example 4.
Table 1 shows the results of changes over time in the strength measurement, which was prepared by adding 0 kg and stirring and mixing.
【００２１】〔実施例５〕
ゴルフ場貯水地工事現場から発生した有機質粘土（含水
比５４４．３％、含土率１５．５％、密度１．１１５ｇ
／ｃｍ3 、強熱減量３７．７％、土壌ｐＨ５．３）１ｍ
3 に下記組成の固化剤を２００kg添加し攪拌混合し供試
体とし、強度測定の経時変化の結果を表１に示す。
固化剤の組成
ドロマイトプラスター ７７．７重量％
スラグ ９．３ 重量％
燐酸 ６．２ 重量％
硫酸アルミニウム ６．２ 重量％
高分子凝集剤 ０．６ 重量％Example 5 Organic clay generated from a construction site of a golf course water reservoir (water content ratio 544.3%, soil content 15.5%, density 1.115 g)
/ Cm 3 , loss on ignition 37.7%, soil pH 5.3) 1 m
200 kg of a solidifying agent having the following composition was added to 3 and mixed with stirring to obtain a test sample, and Table 1 shows the results of changes over time in strength measurement. Composition of solidifying agent Dolomite plaster 77.7% by weight Slag 9.3% by weight Phosphoric acid 6.2% by weight Aluminum sulfate 6.2% by weight Polymeric flocculant 0.6% by weight
【００２２】[0022]
【表１】 [Table 1]
【００２３】〔実施例６〕
ビル建設工事現場から発生した粘土質土壌（含水比８
２．０％、含土率５５．０％、土壌ｐＨ１０．５）１ｍ
3 に下記組成の固化剤を１３０kg添加し攪拌混合し供試
体とし、強度測定の経時変化の結果を表２に示す。
固化剤の組成
スラグ ５４．１重量％
ドロマイトプラスター ３２．４重量％
燐酸 １３．５重量％Example 6 Clay soil (water content ratio 8) generated from a building construction site
2.0%, soil content 55.0%, soil pH 10.5) 1m
130 kg of the solidifying agent having the following composition was added to 3 and mixed with stirring to obtain a test sample, and Table 2 shows the results of changes over time in the strength measurement. Composition of solidifying agent Slag 54.1% by weight Dolomite plaster 32.4% by weight Phosphoric acid 13.5% by weight
【００２４】〔実施例７〕
実施例６の土壌１ｍ3 に下記組成の固化剤を１３０kg添
加し攪拌混合し供試体とし、強度測定の経時変化の結果
を表２に示す。
固化剤の組成
ドロマイトプラスター ５２．２重量％
燐酸 ２１．７重量％
半水石膏 ２６．１重量％Example 7 To 1 m 3 of the soil of Example 6, 130 kg of the solidifying agent having the following composition was added, and the mixture was stirred and mixed to obtain a test sample. The results of changes in strength measurement with time are shown in Table 2. Composition of solidifying agent Dolomite plaster 52.2% by weight Phosphoric acid 21.7% by weight Hemihydrate gypsum 26.1% by weight
【００２５】[0025]
【表２】 [Table 2]
【００２６】[0026]
【発明の効果】 本発明の土壌固化剤は、土壌と混合し
て植物生育に支障のないｐＨ範囲で短時間に運搬輸送の
可能な高強度に固化せしめることが出来、また固化物は
水との接触によっても崩壊せず、更に重機類で容易に突
崩すことが出来、建設現場での発生土等の土壌の大量迅
速処理が可能になり、そして得られた土壌固化物は土壌
資材としてリサイクルが可能になる。EFFECTS OF THE INVENTION The soil solidifying agent of the present invention can be mixed with soil to solidify it to a high strength capable of being transported and transported in a short time within a pH range that does not hinder plant growth, and the solidified product is water. It does not disintegrate even when contacted with it, and it can be easily collapsed with heavy machinery, enabling large-scale swift treatment of soil such as soil generated at construction sites, and the obtained solidified soil is recycled as soil material. Will be possible.
フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｃ０９Ｋ 17/08 Ｃ０９Ｋ 17/14 Ｐ 17/14 17/18 Ｐ 17/18 17/48 Ｐ 17/48 103:00 // Ｃ０９Ｋ 103:00 Ｂ０９Ｂ 3/00 Ｚ (56)参考文献 特開 平10−316967（ＪＰ，Ａ) 特開 昭54−113910（ＪＰ，Ａ) 特開 平７−179854（ＪＰ，Ａ) 特開 昭50−103809（ＪＰ，Ａ) 特開2002−194351（ＪＰ，Ａ) 特開2002−167582（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C09K 17/02 C09K 17/06 - 17/08 C09K 17/14 C09K 17/18 C09K 17/22 C09K 17/42 C09K 17/48 C09K 103:00 B09B 3/00 Front page continuation (51) Int.Cl. 7 Identification code FI C09K 17/08 C09K 17/14 P 17/14 17/18 P 17/18 17/48 P 17/48 103: 00 // C09K 103: 00 B09B 3/00 Z (56) Reference JP-A-10-316967 (JP, A) JP-A-54-113910 (JP, A) JP-A-7-179854 (JP, A) JP-A-50-103809 ( JP, A) JP 2002-194351 (JP, A) JP 2002-167582 (JP, A) (58) Fields investigated (Int.Cl. 7 , DB name) C09K 17/02 C09K 17/06-17 / 08 C09K 17/14 C09K 17/18 C09K 17/22 C09K 17/42 C09K 17/48 C09K 103: 00 B09B 3/00
Claims (4)
または酸化マグネシウム含有物Ａを酸化マグネシウムと
して４〜５０重量％、高炉スラグＢを１〜２０重量％含
み、ＡとＢとの混合物に対して燐酸成分Ｃを燐酸換算で
０．５〜５０重量％添加したことを特徴とする土壌固化
剤1. A soil solidifying agent containing magnesium oxide and / or
Or 4-50 wt% magnesium oxide-containing substance A as magnesium oxide, blast furnace slag B 1 to 20 wt% free
See, soil solidifying agent, characterized in that the addition of 0.5 to 50% by weight phosphoric acid in terms of the phosphate Ingredient C on the mixture of A and B
シウムが５〜５０重量％含有されていることを特徴とす
る土壌固化剤2. A method according to claim 1 of the soil solidifying agent further calcium sulfate in the soil solidifying agent is characterized that you are contained 5-50 wt%
ｐＨ調整を目的として酸性剤が５〜１００重量％含有さ
れていることを特徴とする土壌固化剤3. A process according to claim 1 or acidic agent is contained 5 to 100 wt% for the purpose of further pH-adjusted during 2 soil solidifying agent
Soil solidifying agent characterized by being
には更に有機高分子凝集剤および／または吸水性樹脂が
０．１〜５．０重量％含有されていることを特徴とする
土壌固化剤4. The soil solidifying agent according to claim 1, 2, or 3.
Organic polymeric flocculant further in and / or water absorbing resins
0 . Soil solidifying agent, characterized in that 1 to 5.0 are weight% containing organic
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| JP4380154B2 (en) * | 2002-12-24 | 2009-12-09 | 栗田工業株式会社 | Solidification method of mud |
| JP2005002190A (en) * | 2003-06-11 | 2005-01-06 | Mirai Kensetsu Kogyo Kk | Soil improving material safe for marine organism and method for evaluating safety thereof |
| JP2005105266A (en) * | 2003-09-10 | 2005-04-21 | Raito Kogyo Co Ltd | Material for soil-sand structure and method for surface protection of slope, lining face and, covered face of tunnel, and method for protecting slope face using the same |
| JP2008255193A (en) * | 2007-04-03 | 2008-10-23 | Matsuda Giken Kogyo Kk | Soil hardener |
| KR100919620B1 (en) * | 2009-02-06 | 2009-09-30 | 유종희 | The artificial soil composition and its manufacturing method that using the industrial by-product for recovering an abandoned quarry mining |
| JP5306524B1 (en) * | 2011-11-21 | 2013-10-02 | 吉澤石灰工業株式会社 | Hazardous material insolubilizing material and treatment method using the same |
| JP6021706B2 (en) * | 2013-03-25 | 2016-11-09 | 宇部マテリアルズ株式会社 | Soil-solidifying agent and soil-solidifying method |
| KR101835067B1 (en) * | 2013-10-01 | 2018-03-06 | 요시자와 셋카이 고교 가부시키가이샤 | Insolubilizing material for hazardous substances, and treatment method using same |
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