JP2002249774A - Soil solidification agent - Google Patents
Soil solidification agentInfo
- Publication number
- JP2002249774A JP2002249774A JP2001050139A JP2001050139A JP2002249774A JP 2002249774 A JP2002249774 A JP 2002249774A JP 2001050139 A JP2001050139 A JP 2001050139A JP 2001050139 A JP2001050139 A JP 2001050139A JP 2002249774 A JP2002249774 A JP 2002249774A
- Authority
- JP
- Japan
- Prior art keywords
- soil
- weight
- added
- solidifying agent
- 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.)
- Granted
Links
Abstract
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。BACKGROUND OF THE INVENTION The present invention relates to a method for growing soil such as soil generated from a construction site such as a shield method, an underground continuous wall method, a dredging method, a surface layer and deep ground improvement method, and a residential land development. The present invention relates to a soil solidifying agent used for solidifying in a pH range that does not hinder the soil. The soil solidified by the soil solidifying agent is therefore recyclable 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 sites, contains a large amount of water and has fluidity.
Difficult to transport. Therefore, a method is employed in which the soil is solidified by adding a soil solidifying agent, and then 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。2. Description of the Related Art Conventionally, cement hardeners, quicklime-based hardeners, gypsum-based hardeners, organic polymer-based flocculants, water-absorbing resins, and the like have been used as soil hardeners of this type.
【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１
２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-mentioned cement-based solidifying agent and quick lime-based solidifying agent are usually added in an amount of 10 to 15% by weight based on the soil.
2 or more, causing alkaline pollution. There is also a problem that it takes a long time to solidify to the extent that transportation and transportation are possible. Furthermore, the above-mentioned gypsum-based solidifying agent has no risk of alkali pollution, and the treated soil solidifies in a short time. However, when it comes into contact with water, the solidifying agent dissolves and the treated soil collapses. In case (1), poor solidification may occur, so it is necessary to add a large amount. Furthermore, even with the above-mentioned organic polymer-based flocculant and water-absorbing resin, there is no risk of alkali pollution, and the solidification time is fast, but the treated soil has no water resistance, and when it comes into contact with water, the treated soil collapses, and In the case of soil containing a large amount of water, the amount of the organic polymer-based coagulant or water-absorbing resin added becomes large, and the treated soil becomes an elastic body, which makes it difficult to break or carry out the work with heavy equipment. 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、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を酸化マグネ
シウムとして１〜１００重量％と高炉スラグ０〜１００
重量％との混合物に対して燐酸成分を燐酸換算で０．５
〜５０重量％添加した土壌固化剤を提供するものであ
る。該土壌固化剤に更に硫酸カルシウム５〜５０重量％
を含有することが望ましく、該土壌固化剤に更にｐＨ調
整を目的として酸性剤５〜１００重量％を含有すること
が望ましい。また更に該土壌固化剤に更に有機高分子凝
集剤および／または吸水性樹脂を０．１〜５．０重量％
を含有することが望ましい。SUMMARY OF THE INVENTION It is an object of the present invention to solidify soil such as soil generated from a construction site in such a way that it can be transported and transported in a short time.
As means for solving the above-mentioned problems, magnesium oxide and / or magnesium oxide-containing material is 1 to 100% by weight as magnesium oxide and blast furnace slag 0 to 100.
% By weight of the phosphoric acid component based on the mixture with
The purpose of the present invention is to provide a soil hardening agent to which about 50% by weight is added. 5-50% by weight of calcium sulfate is further added to the soil solidifying agent.
It is desirable that the soil hardening agent further contains 5 to 100% by weight of an acid agent for the purpose of pH adjustment. Further, 0.1 to 5.0% by weight of an organic polymer flocculant and / or a water absorbent resin is further added to the soil solidifying agent.
It is desirable to contain
【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 Magnesium oxide used in the present invention includes a low-temperature fired product and a high-temperature fired product. From the viewpoint of reactivity, it is desirable to use a low-temperature fired product (calcined magnesia). In the present invention, those containing magnesium oxide such as calcined dolomite and dolomite plaster can also be used. The calcined dolomite is dolomite (a double salt of calcium carbonate and magnesium carbonate, containing theoretically 54.27% of calcium carbonate and 45.73% of magnesium carbonate) at 700 to 1000 ° C. to convert magnesium carbonate to magnesium oxide. In addition, some of the calcium carbonate is calcium oxide. Dolomite plaster is obtained by finely pulverizing and sizing hydroxy dolomite obtained by reacting and digesting calcined dolomite with water, and is a magnesium oxide-containing substance more desirable than calcined dolomite which has a problem in powdering.
【０００７】本発明に使用される高炉スラグとしては、
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。The blast furnace slag used in the present invention includes:
Granulated blast furnace granulated slag for blast furnace slag cement is desirable.
【０００８】本発明で使用される燐酸成分としては燐酸
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。As the phosphoric acid component used in the present invention, there are phosphoric acid and phosphates such as sodium phosphate, potassium phosphate, ammonium phosphate and the like. , Ammonium monophosphate, sodium acid pyrophosphate and sodium hexametaphosphate are preferred. Further, lime perphosphate containing heavy phosphoric acid and heavy lime phosphate can 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 has been added and mixed in a short time, calcium sulfate (gypsum) may be added in order to obtain a strength which does not hinder the handling operation of the soil and does not fluidize. The above-mentioned gypsum includes anhydrous gypsum, hemihydrate gypsum, and gypsum, and 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. Powdered 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 preferable acid agents because they promote 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。When the water content of the soil to be treated is high, for example, 100% or more, it is necessary to absorb free water in the soil to improve the solidification strength of the soil to be treated and to reduce the amount of the soil solidifying agent added. An organic polymer flocculant and / or a water-absorbing resin are used. Examples of the organic polymer coagulant include sodium polyacrylate, polyacrylamide, sodium acrylate-acrylamide copolymer, polyethylene oxide, and the like. Examples of the water-absorbing resin include polyacrylic acid, sodium polyacrylate, and polyacrylic acid. Acrylamide and the like.
【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ｐＨ５
〜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 components, the soil is solidified by a solidification reaction between magnesium oxide, blast furnace slag, a phosphoric acid component, and the soil. If calcium sulfate is further added, the solidification time in the solidification reaction can be shortened. Further, the pH of the soil is adjusted to a pH range which does not hinder the growth of the plant by the acidic agent, that is, pH 10 or less, preferably pH 5 or less.
~ 9, more desirably pH 5.8 ~ 8.6.
In the case of soil containing a large amount of water, when the organic polymer flocculant and / or the water-absorbing resin are added in addition to the above components, the soil condenses and free water in the soil is eliminated, or The water in the soil is absorbed, and a solidified material having a 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
含有物は、酸化マグネシウム換算で１〜１００重量％、
望ましくは４〜５０重量％、高炉スラグは０〜１００重
量％、望ましくは１〜２０重量％、燐酸成分は上記酸化
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５〜５０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。[0013] The amount of the above components to be added is 1 to 100% by weight in terms of magnesium oxide in the soil solidifying agent of the present invention.
Desirably, 4 to 50% by weight, blast furnace slag is 0 to 100% by weight, desirably 1 to 20% by weight, and the phosphoric acid component is calculated in terms of phosphoric acid with respect to the magnesium oxide and / or the mixture of the magnesium oxide-containing material and the blast furnace slag. 0.5-50
%, Desirably 1 to 20% by weight, when calcium sulfate is added, 5 to 50% by weight in the soil solidifying agent, and when an acid agent is added, 5 to 100% in the soil solidifying agent.
%, And it is needless to say that the amount of the acid agent should be adjusted according to the pH of the soil. When an organic polymer flocculant and / or a water-absorbing resin is added, it is added in the range of 0.1 to 5.0% by weight in the above-mentioned soil solidifying agent. Adjusted according to quantity. In the above-mentioned soil solidifying agent, when the soil contains a large amount of inorganic matter relative to organic matter, the amount of magnesium oxide is reduced, the amount of blast furnace slag is increased, and conversely, the amount of organic matter is large relative to inorganic matter If so, increase the amount of magnesium oxide and reduce 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 prepared by mixing all the components before adding them to the soil and then adding them to the soil. Alternatively, each component may be added individually to the soil. Two or more of these 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１ｍ 3 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。Amount of the soil solidifying agent of the present invention added to soil
Is controlled by soil quality, water content and the like. Generally organic
In the case of soil containing a large amount of
In the case of soil with low organic matter, the amount of addition is increased. Change
In the case of soils with a high water content,
If the soil is small, the amount of addition should be small. Typically
In the case of a soil having a water content of 100% or less,
1m soil hardener ThreeAdd about 30-100kg per
In the case of soil with a water content of 100 to 400%,
Ming's soil solidifying agent is 1m of soilThreeAbout 50-250kg per
Is added.
【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８４．８％、含土率５４．１
％、密度１．５０２ｇ／ｃｍ3 、細粒分４８．９％、強
熱減量８．２％、土壌ｐＨ６．２）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 84.8%, soil content 54.1%)
%, Density 1.502 g / cm 3 , fine grain fraction 48.9%, loss on ignition 8.2%, soil pH 6.2) 100 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 specimen. Table 1 shows the results of the time-dependent changes in the strength measurement. 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ｐＨ７．６）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 sewage works site (moisture content 46.9%, soil content 68.%).
0%, density 1.686 g / cm 3 , fine particle content 100%, loss on ignition 4.4%, soil pH 7.6) 100 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 specimen. Table 1 shows the results of the measurement over time. Composition of solidifying agent Slag 58.8% by weight Magnesium oxide 17.7% by weight Lime perphosphate 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／ｃｍ3 、細粒分９１．６％、強
熱減量６．６％、土壌ｐＨ６．３）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 house construction site (water content: 50.7%, soil content: 66.4)
%, Density 1.727 g / cm 3 , fine particles 91.6%, loss on ignition 6.6%, soil pH 6.3) To 1 m 3 , 80 kg of a solidifying agent having the following composition was added and mixed by stirring to obtain a test specimen. Table 1 shows the results of the time-dependent changes in the strength measurement. Composition of solidifying agent Slag 50% by weight Dolomite plaster 25% by weight Lime heavy superphosphate 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 generated from a river construction site (water content 191.1%, soil content 34.4%, density 1.265 g / cm 3 , fine particles 82.6%, ignition Weight loss 22.8%, soil pH 6.1) 120 kg of a solidifying agent having the following composition was added to 1 m 3 and stirred and mixed to obtain a test sample. Composition of solidifying agent Magnesium oxide 43.3% by weight Slag 13% by weight Lime perphosphate 25.9% by weight Polyaluminum chloride 8.7% by weight Calcium sulfate 8.7% by weight Polymer 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。[Comparative Example 1] 120 kg of ordinary Portland cement was added to 1 m 3 of the soil of Example 4 and mixed by stirring to obtain a test sample.
【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１
５．５％、密度１．１１５ｇ／ｃｍ3 、強熱減量３７．
７％、土壌ｐＨ５．３）１ｍ3 に下記組成の固化剤を２
００kg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 (water content 544.3%, soil content 1) generated from the construction site of a golf course water storage area
5.5%, density 1.115 g / cm 3 , loss on ignition
7%, soil pH 5.3) 1 m 3 of a solidifying agent of the following composition
Table 1 shows the results of changes over time in the 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 Polymer 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８２．０％、含土率５５．０％、
土壌ｐＨ１０．５）１ｍ3 に下記組成の固化剤を１３０
kg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 generated from a building construction site (moisture content 82.0%, soil content 55.0%,
(Soil pH 10.5) 1 m 3 of 130 solidifying agent of the following composition
kg was added and mixed by stirring to obtain a test sample, and the results of the time-dependent change in the strength measurement are shown in Table 2. 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 7 130 kg of a solidifying agent having the following composition was added to 1 m 3 of the soil obtained in Example 6 and mixed with stirring to obtain a specimen.
Table 2 shows the results of the time-dependent changes in the strength measurement. Composition of solidifying agent Dolomite plaster 52.2% by weight Phosphoric acid 21.7% by weight Gypsum hemihydrate 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。EFFECT OF THE INVENTION The soil solidifying agent of the present invention can be mixed with soil to solidify it into a high strength that can be transported and transported in a short time within a pH range that does not hinder plant growth. It does not collapse even when it comes into contact with it, and can be easily broken down with heavy equipment, enabling large-scale rapid treatment of soil such as generated soil at construction sites, and the obtained solidified soil is recycled as soil material Becomes possible.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ０９Ｋ 17/42 Ｃ０９Ｋ 103:00 // Ｃ０９Ｋ 103:00 Ｂ０９Ｂ 3/00 Ｚ ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) C09K 17/42 C09K 103: 00 // C09K 103: 00 B09B 3/00 Z
Claims (4)
ネシウム含有物を酸化マグネシウムとして１〜１００重
量％と高炉スラグ０〜１００重量％との混合物に対して
燐酸成分を燐酸換算で０．５〜５０重量％添加したこと
を特徴とする土壌固化剤1. A phosphoric acid component of 0.5 to 50% by weight in terms of phosphoric acid based on a mixture of 1 to 100% by weight of magnesium oxide and / or magnesium oxide-containing material as magnesium oxide and 0 to 100% by weight of blast furnace slag. Soil solidifying agent characterized by being added
ム５〜５０重量％を含有することを特徴とする土壌固化
剤2. A soil hardening agent according to claim 1, further comprising 5 to 50% by weight of calcium sulfate.
調整を目的として酸性剤５〜１００重量％を含有するこ
とを特徴とする土壌固化剤3. The soil hardening agent according to claim 1 or 2, further comprising a pH.
A soil hardening agent containing 5 to 100% by weight of an acid agent for adjustment.
更に有機高分子凝集剤および／または吸水性樹脂を０．
１〜５．０重量％を含有することを特徴とする土壌固化
剤4. A soil solidifying agent according to claim 1, further comprising an organic polymer flocculant and / or a water absorbing resin.
A soil solidifying agent containing 1 to 5.0% by weight.
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|---|---|---|---|
| JP2001050139A JP3527477B2 (en) | 2001-02-26 | 2001-02-26 | Soil hardening agent |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001050139A JP3527477B2 (en) | 2001-02-26 | 2001-02-26 | Soil hardening agent |
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|---|---|
| JP2002249774A true JP2002249774A (en) | 2002-09-06 |
| JP3527477B2 JP3527477B2 (en) | 2004-05-17 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004203962A (en) * | 2002-12-24 | 2004-07-22 | Kurita Water Ind Ltd | Mud-solidifying agent and solidifying method |
| 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 |
| JP2013253216A (en) * | 2011-11-21 | 2013-12-19 | Yoshizawa Lime Industry | Harmful substance insolubilizing material and treatment method using the same |
| JP2014185300A (en) * | 2013-03-25 | 2014-10-02 | Ube Material Industries Ltd | Soil solidification agent and soil solidification method |
| WO2014162623A1 (en) * | 2013-10-01 | 2014-10-09 | 吉澤石灰工業株式会社 | Insolubilizing material for hazardous substances, and treatment method using same |
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2001
- 2001-02-26 JP JP2001050139A patent/JP3527477B2/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004203962A (en) * | 2002-12-24 | 2004-07-22 | Kurita Water Ind Ltd | Mud-solidifying agent and solidifying method |
| 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 |
| JP2013253216A (en) * | 2011-11-21 | 2013-12-19 | Yoshizawa Lime Industry | Harmful substance insolubilizing material and treatment method using the same |
| JP2014185300A (en) * | 2013-03-25 | 2014-10-02 | Ube Material Industries Ltd | Soil solidification agent and soil solidification method |
| WO2014162623A1 (en) * | 2013-10-01 | 2014-10-09 | 吉澤石灰工業株式会社 | Insolubilizing material for hazardous substances, and treatment method using same |
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