JPH0853669A - Dustless hardener for ground improvement - Google Patents
Dustless hardener for ground improvementInfo
- Publication number
- JPH0853669A JPH0853669A JP6190798A JP19079894A JPH0853669A JP H0853669 A JPH0853669 A JP H0853669A JP 6190798 A JP6190798 A JP 6190798A JP 19079894 A JP19079894 A JP 19079894A JP H0853669 A JPH0853669 A JP H0853669A
- Authority
- JP
- Japan
- Prior art keywords
- solidifying material
- weight
- aqueous solution
- cement
- alcohol
- 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]
【産業上の利用分野】本発明は、軟弱地盤等の土質改良
工法に用いる無粉塵固化材に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-dust solidifying material used in a soil improvement method for soft ground.
【０００２】[0002]
【従来の技術】従来より、例えば軟弱地盤等の土質改良
では、軟弱地盤の表面に粉状のセメント系固化材を散布
し、路上混合式スタビライザーでセメント系固化材と土
壌とを十分攪拌・混合し、その上をローラーで転圧して
締め固めた後、土中の水分とセメント系固化材が反応固
化して軟弱地盤を強化する等の方法がとられていた。2. Description of the Related Art Conventionally, for soil improvement of soft ground, for example, powdery cement-based solidifying material is sprinkled on the surface of the soft ground, and the cement-based solidifying material and soil are sufficiently agitated and mixed with a road-mixing stabilizer. Then, after rolling on it with a roller to compact it, the water in the soil and the cement-based solidifying material react and solidify to strengthen the soft ground.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、前述し
た従来の方法では、粉状のセメント系固化材の散布時に
落下による衝撃や風等の影響で固化材がかなり飛散す
る。また、固化材と土壌との攪拌・混合時においても粉
状の固化材が相当量飛散する。この粉状のセメント系固
化材の飛散による発塵は、周囲に煙の如く立ち込め作業
環境を悪化させると共に周辺住民に被害を及ぼしてい
た。However, in the above-mentioned conventional method, the solidifying material is considerably scattered due to the impact of the dropping and the influence of wind when the powdery cementitious solidifying material is sprayed. Further, even when the solidifying material and the soil are stirred and mixed, a considerable amount of the powdery solidifying material is scattered. The dust generated due to the scattering of the powdery cement-based solidifying material stood in the surroundings like smoke, deteriorating the work environment and damaging the surrounding residents.
【０００４】このような粉状のセメント系固化材が有す
る欠点を除去するため、固化材をスラリー状或いは塊状
にして散布する等の方法がとられていた。しかし、これ
らの方法では、散布時での飛散による発塵はないもの
の、スラリー状の散布では一般に含水量の多い軟弱地盤
の土質改良を行うため、多量の水をさらに加えることは
固化性能を低下させることとなる。さらに、地盤強化の
目的を達成させるための固化材所要量が大幅に増大す
る。In order to eliminate the drawbacks of such a powdery cement-based solidifying material, a method of spraying the solidifying material in the form of slurry or lumps has been used. However, in these methods, although there is no dust generation due to scattering during spraying, slurry-based spraying generally improves the soil quality of soft soil with a high water content, so adding a large amount of water lowers the solidification performance. Will be made. Furthermore, the amount of solidifying material required to achieve the purpose of ground reinforcement is significantly increased.
【０００５】一方、固化材の塊状化は、路上混合式スタ
ビライザーのキャタピラが通過する際に崩れた固化材を
巻き上げたり、シャンクの回転による攪拌・混合時にお
いても完全に固化材の飛散を防止することはできない。
アルコール系化合物が発塵防止のために使用されること
もあるが、アルコール系化合物単味は危険物であり取扱
いが難しく、また、粘性が高く噴霧が困難になるため十
分な発塵防止効果が期待できない等の課題があった。On the other hand, the agglomeration of the solidified material prevents the solidified material from being scattered when the caterpillar of the on-road mixing type stabilizer passes through it, or when stirring and mixing by the rotation of the shank. It is not possible.
Alcohol-based compounds are sometimes used to prevent dust generation, but alcohol-based compounds alone are dangerous substances and are difficult to handle, and since viscosity is high and spraying becomes difficult, a sufficient dust-prevention effect is obtained. There were issues such as expectations that could not be expected.
【０００６】[0006]
【課題を解決するための手段】本発明は、濃度５〜７０
重量％のアルコール系化合物の水溶液を、粉状のセメン
ト系固化材に対して均一に１〜１０重量％添加・混合し
て得られる無粉塵固化材であり、このような構成を採用
することにより好適に上記課題を解決した。The present invention has a concentration of 5 to 70.
A dust-free solidifying material obtained by uniformly adding and mixing 1% to 10% by weight of an aqueous solution of an alcohol-based compound to a powdery cement-based solidifying material. By adopting such a configuration, The above-mentioned subject was solved suitably.
【０００７】本発明においては、上記した如く粉状のセ
メント系固化材に所定量のアルコール系化合物の水溶液
を均一に添加・混合することにより、固化材表面にアル
コール系化合物の水溶液を付着させ、粉体同士を連結す
る液体架橋を形成して粉体の表面を濡らし湿った状態と
し、その濡れ及び凝集効果で飛散による発塵を防止す
る。この液体架橋の形成には、例えば、最も安価な水に
よっても可能であるが、セメント系固化材に水を加える
ことは、製造後の保管中に水との反応で固化してしまい
固化材としての役目を果たさなくなる。よって、添加す
る液体は固化材とほとんど水和反応しないことが必要条
件となる。In the present invention, as described above, a predetermined amount of the aqueous solution of the alcohol compound is uniformly added to and mixed with the powdery cement-based solidifying material to adhere the aqueous solution of the alcohol-based compound to the surface of the solidifying material, Liquid crosslinks connecting the powders are formed to wet and wet the surface of the powders, and dusting due to scattering is prevented due to the wetting and aggregating effects. The formation of this liquid cross-link can be performed, for example, even with the cheapest water, but adding water to the cement-based solidifying material solidifies due to a reaction with water during storage after production, and thus the solidifying material is used. Will not fulfill the role of. Therefore, it is a necessary condition that the liquid to be added hardly undergoes a hydration reaction with the solidifying material.
【０００８】このようなことから、本発明では、最も安
価な水と反応せず、且つ蒸気圧が低く揮発しにくく、セ
メント系固化材の品質を長期間安定維持することができ
るアルコール系化合物に着目し、これらを混合したアル
コール系化合物の水溶液を用いた。粉状のセメント系固
化材にアルコール系化合物の水溶液を均一に添加・混合
させる方法としては、高速混合機で攪拌されている固化
材中に水溶液を噴霧するか、または別の粉体に予めアル
コール系化合物の水溶液を混合しておき、その粉体と固
化材とを均一に混合する等の方法がありその作業は簡便
である。In view of the above, the present invention provides an alcohol-based compound which does not react with the cheapest water, has a low vapor pressure and is hard to volatilize, and can maintain the quality of the cement-based solidifying material stably for a long period of time. Focusing attention, an aqueous solution of an alcoholic compound obtained by mixing these was used. As a method for uniformly adding and mixing an aqueous solution of an alcoholic compound to a powdery cement-based solidifying material, the aqueous solution is sprayed into the solidifying material which is being stirred by a high-speed mixer, or alcohol is previously added to another powder. There is a method in which an aqueous solution of a system compound is mixed and the powder and the solidifying material are uniformly mixed, and the operation is simple.
【０００９】ここで、上記本発明においてセメント系固
化材に添加・混合するアルコール系化合物の水溶液濃度
及びその添加量は、それぞれ５〜７０重量％及び１〜１
０重量％であるが、濃度については５重量％以下ではア
ルコール系化合物の含有量が少く、固化材との水和反応
抑制作用が小さくなり過ぎて、長期間粉状の状態が維持
できなくなる。また７０重量％を越えると、アルコール
系化合物の濃度が高くなり水溶液の粘性が増して噴霧に
よる添加が困難となる。一方、添加量については、１重
量％以下では粉体間の液体架橋の形成が難しく、濡れ・
凝集効果も発揮できず固化材の飛散による発塵を防止す
ることができない。また１０重量％を越えると、粉体の
湿り具合が大きくなり過ぎて粉体としての流動性を損な
い、軟弱地盤等への散布や土壌との均一な攪拌・混合が
できなくなる。したがって、アルコール系化合物の水溶
液濃度及び添加量は、それぞれ１０〜５０重量％及び２
〜７重量％である。Here, the aqueous solution concentration and the amount of addition of the alcohol compound added to and mixed with the cement-based solidifying material in the present invention are 5 to 70% by weight and 1 to 1, respectively.
Although the content is 0% by weight, when the concentration is 5% by weight or less, the content of the alcohol compound is small, the inhibitory effect on the hydration reaction with the solidifying material becomes too small, and the powdery state cannot be maintained for a long time. On the other hand, if it exceeds 70% by weight, the concentration of the alcohol compound becomes high, the viscosity of the aqueous solution increases, and it becomes difficult to add it by spraying. On the other hand, if the amount added is less than 1% by weight, it is difficult to form liquid crosslinks between powders, and wetting /
The aggregating effect cannot be exerted, and dust generation due to the scattering of the solidifying material cannot be prevented. On the other hand, if it exceeds 10% by weight, the wetness of the powder becomes too large, impairing the fluidity of the powder, and it becomes impossible to spray it on soft ground or the like and evenly mix and mix it with soil. Therefore, the aqueous solution concentration and addition amount of the alcohol-based compound are 10 to 50% by weight and 2%, respectively.
~ 7% by weight.
【００１０】本発明において対象となる上記セメント系
固化材としては、軟弱地盤の土譲と混合すると土中の水
分及び土壌と反応固化し、軟弱地盤を強化するものであ
ればどのようなものでもよい。例えば、各種ポルトラン
ドセメント、各種混合セメント、アルミナセメント等の
特殊セメントであり、これらにスラグ、ポゾラン、せっ
こう、石灰等を混入したセメント系固化材及び市販のセ
メント系固化材も対象となる。As the above-mentioned cement-based solidifying material to be used in the present invention, any material can be used as long as it mixes with soil of soft ground and reacts with water in the soil and solidifies to strengthen the soft ground. Good. For example, it is a special cement such as various portland cements, various mixed cements, and alumina cements, and a cement-based solidifying material obtained by mixing slag, pozzolan, gypsum, lime or the like into these and a commercially available cement-based solidifying material are also applicable.
【００１１】本発明において使用する上記アルコール系
化合物としては、特許請求の範囲の請求項２に記載する
エチレングリコール、ジエチレングリコール、トリエチ
レングリコール、プロパノール、プロピレングリコー
ル、ポリエチレングリコール、ポリビニールアルコール
或いはグリセリンから選ばれた１種または２種以上が挙
げられるが、水溶液としての固化材への混合性が良く、
固化材の水和反応抑制作用も優れ、また無臭で揮発し難
く安価である点から、ポリエチレングリコールの使用が
好ましい。ポリエチレングリコールは、水への溶解度が
高く、水溶液としての粘性も低い分子量２００〜４００
０のものが好ましい。The alcohol compound used in the present invention is selected from ethylene glycol, diethylene glycol, triethylene glycol, propanol, propylene glycol, polyethylene glycol, polyvinyl alcohol or glycerin described in claim 2. One or two or more of them are listed, but they have good mixability with the solidifying material as an aqueous solution,
Polyethylene glycol is preferably used because it has an excellent effect of suppressing the hydration reaction of the solidifying material, and is odorless, hard to volatilize, and inexpensive. Polyethylene glycol has a high solubility in water and a low viscosity as an aqueous solution.
0 is preferable.
【００１２】[0012]
【作用】セメント系固化材の飛散による発塵を抑制する
には、前述のように、固化材表面に液体を付着させ、粉
体同士を連結する液体架橋を形成してその濡れ及び凝集
効果を利用する。この液体に水を用いれば、前述のよう
に、製造後の保管中に固化材との水和反応により固化し
てしまい、固化材としての役目を果たさなくなる。As described above, in order to suppress dust generation due to the scattering of the cement-based solidifying material, as described above, the liquid is attached to the surface of the solidifying material to form a liquid bridge that connects the powders to each other, and the wetting and aggregation effects thereof are To use. If water is used for this liquid, as described above, it will be solidified by the hydration reaction with the solidifying material during storage after production, and will not serve as the solidifying material.
【００１３】一方、アルコール系化合物単味では、高粘
性を有する液体あるいは固体であるため、常温での固化
材への噴霧等による均一な添加・混合や液体による濡れ
及び凝集効果が期待できず発塵の抑制は困難となる。し
たがって、アルコール系化合物単味を低粘性液体とする
ため、加熱や他の有機溶媒に溶解する等の方法も考えら
れるが、そのための設備や他の有機溶媒が必要となり価
格もかなり上昇する。さらに、アルコール系化合物は単
味であっても危険物であるのでこれらの処理を加えるこ
とは一層危険性を増すことになる。また、アルコール系
化合物単味をセメント系固化材に均一に添加・混合でき
たとしても、これらの有機物を多く含有する固化材を土
壌に散布・混合すれば周辺環境への汚染につながりかね
ない。さらに、後述の比較例に示すように、改良土の固
化特性をかなり低下させる。On the other hand, since alcoholic compounds alone are liquids or solids having high viscosity, uniform addition / mixing by spraying to the solidifying material at room temperature and wetting / aggregation effects by the liquid cannot be expected, so that they are generated. Dust control becomes difficult. Therefore, a method of heating or dissolving it in another organic solvent may be considered in order to make the alcohol compound alone a low-viscosity liquid, but the equipment and other organic solvent for that purpose are required, and the price rises considerably. Furthermore, since alcohol compounds are dangerous substances even if they are plain, addition of these treatments further increases the risk. Even if the alcohol compound alone can be uniformly added to and mixed with the cement-based solidifying material, if the solidifying material containing a large amount of these organic substances is sprayed and mixed into the soil, it may lead to pollution of the surrounding environment. Furthermore, as shown in the comparative example described below, the solidification characteristics of the improved soil are considerably reduced.
【００１４】本発明のアルコール系化合物の水溶液の使
用は、アルコール系化合物単味に多量の水を加えるた
め、常温で低粘性の液体が得られ、噴霧による固化材へ
の均一な添加・混合が可能となる。そのため、アルコー
ル系化合物単味の使用時と比べて、発塵の抑制効果が著
しく向上する。また、多量の水を加えたにもかかわら
ず、水溶液中の水はアルコール系化合物によって固化材
との水和反応が阻害され水和を抑制し、これらのアルコ
ール系化合物は蒸気圧が低く揮発し難いことから、この
抑制作用を長期間維持する。When the aqueous solution of the alcohol compound of the present invention is used, since a large amount of water is added to the alcohol compound alone, a low-viscosity liquid is obtained at room temperature, and uniform addition / mixing to the solidifying material by spraying is possible. It will be possible. Therefore, the effect of suppressing dust generation is significantly improved as compared with the case of using the alcohol-based compound alone. In addition, despite the addition of a large amount of water, the water in the aqueous solution inhibits hydration by inhibiting the hydration reaction with the solidifying material by the alcohol compound, and these alcohol compounds have a low vapor pressure and volatilize. It is difficult to maintain this inhibitory effect for a long time.
【００１５】本発明においてはアルコール系化合物の水
溶液を使用しているので、後述の実施例に示すように、
製造直後と長期保管後との固化材の固化特性に殆ど差が
なく、固化材は長期間の発塵抑制効果を示し、固化特性
も優れている。アルコール系化合物の水溶液は、多量の
水が加えられているので価格は低減し、危険物からも除
外される。アルコール系化合物単味を低粘性液体にする
ためのように、加熱や他の有機溶媒に溶解する設備は不
要であり、処理の危険性もない。したがって、原料価格
の大幅低減と同時に安全で環境汚染のない廉価な無粉塵
固化材の製造が実現できる。Since an aqueous solution of an alcohol compound is used in the present invention, as shown in the examples below,
There is almost no difference in the solidification characteristics of the solidified material immediately after production and after long-term storage, and the solidified material exhibits the effect of suppressing dust generation for a long time and has excellent solidification characteristics. Aqueous solutions of alcoholic compounds have a large amount of water added, so the price is reduced and they are excluded from hazardous materials. There is no need for equipment for heating or dissolving in another organic solvent as in the case of converting the alcohol-based compound into a low-viscosity liquid, and there is no danger of processing. Therefore, it is possible to significantly reduce the raw material price, and at the same time, to manufacture a safe and inexpensive dust-free solidified material without environmental pollution.
【００１６】[0016]
【実施例】実施例１〜１０及び比較例１〜６ 以下、本発明を実施例を示して詳細に説明する。セメン
ト系固化材（宇部興産（株）製、商品名ＵＫＣ−Ｈ、以
下同じ）に、ポリエチレングリコール（分子量１００
０）の水溶液を表１に示した種々の濃度及び添加量で均
一に添加・混合した試料を調製した。この試料を縦３５
ｃｍ、横３５ｃｍ、高さ６０ｃｍの角形透明プラスチッ
ク容器の頂部投入口より１００ｇ投入し、その際の発塵
量を高さ４５ｃｍの位置に設置した光散乱式デジタル発
塵計により測定した。測定値は１５分間の積算カウント
量で表し表１に示した。なお、ポリエチレングリコール
水溶液の種々の濃度における噴霧状態及び調製した各試
料をポリ袋の中で混ぜることにより評価した粉体として
の流動性も合わせて表１に記載した。EXAMPLES Examples 1 to 10 and Comparative Examples 1 to 6 Hereinafter, the present invention will be described in detail with reference to Examples. Cement-based solidifying material (Ube Industries, Ltd., trade name UKC-H, the same applies hereinafter), polyethylene glycol (molecular weight 100
Samples were prepared by uniformly adding and mixing the aqueous solution of 0) at various concentrations and addition amounts shown in Table 1. This sample is vertically 35
cm, width 35 cm, height 60 cm, and 100 g from the top opening of a rectangular transparent plastic container, and the dust generation amount at that time was measured by a light scattering type digital dust meter installed at a height of 45 cm. The measured values are shown in Table 1 by the integrated count amount for 15 minutes. Table 1 also shows the sprayed state of the polyethylene glycol aqueous solution at various concentrations and the fluidity as a powder evaluated by mixing the prepared samples in a plastic bag.
【００１７】表１に示した結果より、ポリエチレングリ
コール水溶液の噴霧状態は、濃度が８０重量％以上にな
ると悪くなる。発塵量は水溶液の添加量を５重量％一定
とした場合、濃度が５重量％以上であれば試料調製１４
日後においても低く抑えられる。また、ポリエチレング
リコールの水溶液濃度を３０重量％一定とした場合、添
加量が１重量％以上であれば、試料調製１４日後におい
ても発塵量を低く抑えることができる。ただし、添加量
が１２重量％以上になると粉体がべとついた状態とな
り、粉体としての流動性を著しく損うことが判明した。From the results shown in Table 1, the spray state of the polyethylene glycol aqueous solution becomes worse when the concentration becomes 80% by weight or more. If the amount of dust generated is 5% by weight or more when the addition amount of the aqueous solution is fixed at 5% by weight, the sample preparation 14
It can be kept low even after a day. Further, when the concentration of the aqueous solution of polyethylene glycol is constant at 30% by weight, the amount of dust generation can be suppressed to be low even after 14 days from the sample preparation if the addition amount is 1% by weight or more. However, it was found that when the addition amount was 12% by weight or more, the powder became sticky and the fluidity as the powder was significantly impaired.
【００１８】[0018]
【表１】 [Table 1]
【００１９】実施例１１及び比較例７〜１０ セメント系固化材に、ポリエチレングリコール（分子量
４００）の単味及び水溶液（濃度３重量％、３０重量
％、８０重量％）を３重量％均一に添加・混合し、２日
及び１０日間保存した試料を調製した。これらの試料を
前述実施例１による方法で発塵量を測定した。結果を表
２に示す。Example 11 and Comparative Examples 7 to 10 A solid and aqueous solution (concentration 3% by weight, 30% by weight, 80% by weight) of polyethylene glycol (concentration 3% by weight, 30% by weight, 80% by weight) was uniformly added to the cement-based solidifying material by 3% by weight. -Prepare samples that were mixed and stored for 2 and 10 days. The dust generation amount of these samples was measured by the method according to Example 1 described above. Table 2 shows the results.
【００２０】[0020]
【表２】 [Table 2]
【００２１】表２に示した結果より、発塵量はポリエチ
レングリコール単味が最も多く、水溶液とした方が低く
押えることができる。水溶液の濃度は３０重量％が最も
発塵量が少く、３重量％では逆に増加する。水のみでは
さらに発塵量は増加し、試料調製１０日後の発塵量は極
めて多く、発塵の抑制を長期間維持することはできな
い。From the results shown in Table 2, the amount of dust generated is the largest for polyethylene glycol alone, and the aqueous solution can be suppressed lower. When the concentration of the aqueous solution is 30% by weight, the amount of dust is the smallest, and when the concentration is 3% by weight, the concentration is increased. The amount of dust generated further increases with water alone, and the amount of dust generated after 10 days of sample preparation is extremely large, and the suppression of dust generation cannot be maintained for a long period of time.
【００２２】実施例１２〜１８ セメント系固化材にエチレングリコール、ジエチレング
リコール、トリエチレングリコール、プロパノール、プ
ロピレングリコール、ポリビニールアルコール及びグリ
セリンの水溶液（濃度３０重量％）を５重量％均一に添
加・混合し、１４日間保存した試料を調製した。これら
の試料を前述実施例１による方法で発塵量を測定した。
結果を表３に示す。Examples 12 to 18 An aqueous solution (concentration 30% by weight) of ethylene glycol, diethylene glycol, triethylene glycol, propanol, propylene glycol, polyvinyl alcohol and glycerin (concentration 30% by weight) was uniformly added to and mixed with the cementitious solidifying material. A sample stored for 14 days was prepared. The dust generation amount of these samples was measured by the method according to Example 1 described above.
The results are shown in Table 3.
【００２３】[0023]
【表３】 [Table 3]
【００２４】表３に示した結果より、発塵量はアルコー
ル系化合物の種類により若干異なるが、いずれも前述実
施例３のポリエチレングリコールと比べやや多い程度で
あり、試料調製１４日後においても低く押えることがで
きる。From the results shown in Table 3, the amount of dust generated slightly differs depending on the type of alcohol compound, but the amount of dust generation is slightly higher than that of the polyethylene glycol of Example 3 described above, and is kept low even 14 days after the sample preparation. be able to.
【００２５】実施例１９〜２６及び比較例１１〜１４ セメント系固化材及びポリエチレングリコール（分子量
１０００）を用い、ポリエチレングリコールの水溶液を
表４に示した種々の濃度及び添加量でセメント系固化材
に均一に添加・混合した後、１４日間保存した試料を調
製した。これらの試料とポリエチレングリコールの水溶
液を添加しない試料（無添加）とを、それぞれ室内にお
いて砂質土に８０ｋｇ／ｍ3 及び粘性土に１３０ｋｇ／
ｍ3 の割合で混合し、ＪＩＳ Ａ １２１６「土の一軸
圧縮試験方法」により固化性能の差を測定した。結果を
表４に示す。Examples 19 to 26 and Comparative Examples 11 to 14 Cement-based solidifying materials and polyethylene glycol (molecular weight 1000) were used, and aqueous solutions of polyethylene glycol were added to the cement-based solidifying materials at various concentrations and addition amounts shown in Table 4. After uniformly adding and mixing, a sample stored for 14 days was prepared. These samples and a sample to which an aqueous solution of polyethylene glycol was not added (no addition) were respectively used in a room at 80 kg / m 3 for sandy soil and 130 kg / m for cohesive soil.
The mixture was mixed at a ratio of m 3 , and the difference in solidification performance was measured according to JIS A 1216 “Soil uniaxial compression test method”. The results are shown in Table 4.
【００２６】表４に示した結果より、実施例の範囲では
固化性能は対象土より若干異なるものの、いずれの対象
土においても水溶液の添加量が多くなると固化性能はや
や低下する。ただし、この程度の低下では実用上問題と
ならない。なお、比較例でのポリエチレングリコール単
味（水溶液濃度１００重量％）では固化性能はかなり低
下する。From the results shown in Table 4, although the solidification performance is slightly different from that of the target soil in the range of the examples, the solidification performance is slightly lowered in any of the target soils when the addition amount of the aqueous solution is large. However, such a decrease does not pose a practical problem. The solidification performance of the polyethylene glycol alone (100% by weight of the aqueous solution concentration) in the comparative example is considerably lowered.
【００２７】[0027]
【表４】 [Table 4]
【００２８】実施例２７ 軟弱地盤の土質改良を行う工事現場において、セメント
系固化材にポリエチレングリコール（分子量１０００）
の水溶液を、濃度５０重量％及び添加量５重量％として
均一に添加・混合したものと、添加・混合しなかったも
のとを実際に散布し土壌と混合してその際の発塵状況を
目視により観察した。即ち、それぞれの固化材を１ｔバ
ックに収納したフレコンとし、それをクレーンにより吊
り上げフレコンの底を開くことにより散布した。また、
散布した固化材を人力により敷均し、路上混合式スタビ
ライザーで固化材と土壌とを攪拌・混合した。Example 27 Polyethylene glycol (molecular weight 1000) was used as a cementitious solidifying material at a construction site for soil improvement of soft ground.
Of 50% by weight and 5% by weight of the aqueous solution were uniformly added / mixed, and those not added / mixed were actually sprayed and mixed with the soil to visually check the dust generation status at that time. Observed by. That is, each solidified material was made into a flexible container that was stored in a 1t bag, and the flexible container was lifted by a crane to open the bottom of the flexible container for spraying. Also,
The scattered solidifying material was laid down manually, and the solidifying material and soil were stirred and mixed by a road mixing type stabilizer.
【００２９】この結果、ポリエチレングリコールの水溶
液を添加・混合しなかったものは、散布時及び攪拌・混
合時とも粉状のセメント系固化材が工事現場の周囲に煙
りの如く立ち込めた。これに対して、水溶液を添加・混
合したものは散布時及び攪拌・混合時ともその舞い上が
りがほとんどなく、両者の発塵量には明らかな差異が認
められた。As a result, in the case where the polyethylene glycol aqueous solution was not added and mixed, the powdery cement-based solidifying material stood like smoke around the construction site both during spraying and during stirring and mixing. On the other hand, the one to which the aqueous solution was added and mixed did not rise so much at the time of spraying and at the time of stirring and mixing, and there was a clear difference in the amount of dust generated between the two.
【００３０】[0030]
【発明の効果】以上、実施例を示して詳細に説明したよ
うに、本発明に係る地盤改良用無粉塵固化材は、粉状の
セメント系固化材にアルコール系化合物の水溶液を均一
に添加・混合するのみで、極めて簡単かつ効率よく廉価
な無粉塵固化材が得られる。また、固化材の性能を損わ
ず、従来と同様に粉状のままで使用することができる。
さらに、本発明の無粉塵固化材は、工事現場の作業環境
を著しく好転・改善するため、従来のような作業環境へ
の対策も不要であり、且つ都市や住宅地においても従来
の地盤改良工法が適用でき、飛散及び発塵がないため固
化材の損失も少なくなる。As described above in detail with reference to the examples, the ground-improving dust-free solidifying material according to the present invention uniformly adds an aqueous solution of an alcohol compound to a powdery cement-based solidifying material. By simply mixing, a dust-free solidifying material that is extremely simple, efficient and inexpensive can be obtained. Further, the performance of the solidified material is not impaired, and the solidified material can be used in a powdery state as in the conventional case.
Furthermore, since the dust-free solidifying material of the present invention remarkably improves and improves the working environment at the construction site, it is not necessary to take measures against the conventional working environment, and the conventional ground improvement method is used even in cities and residential areas. Can be applied, and since there is no scattering or dust generation, the loss of the solidified material is reduced.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 // Ｃ０９Ｋ 103:00 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 6 Identification code Office reference number FI technical display area // C09K 103: 00
Claims (2)
ルコール系化合物の水溶液を、セメント系固化材に対し
て１〜１０重量％均一に添加・混合した地盤改良用無粉
塵固化材。1. A dust-free solidifying material for ground improvement, which is obtained by uniformly adding and mixing an aqueous solution of an alcoholic compound having a concentration of 5 to 70% by weight with respect to the cementitious solidifying material in an amount of 1 to 10% by weight.
リコール、ジエチレングリコール、トリエチレングリコ
ール、プロパノール、プロピレングリコール、ポリエチ
レングリコール、ポリビニールアルコール或いはグリセ
リンから選ばれた１種または２種以上であることを特徴
とする請求項１に記載の地盤改良用無粉塵固化材。2. The alcohol compound is one or more selected from ethylene glycol, diethylene glycol, triethylene glycol, propanol, propylene glycol, polyethylene glycol, polyvinyl alcohol or glycerin. The dust-free solidifying material for ground improvement according to 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06190798A JP3090301B2 (en) | 1994-08-12 | 1994-08-12 | Dust-free solidification material for ground improvement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06190798A JP3090301B2 (en) | 1994-08-12 | 1994-08-12 | Dust-free solidification material for ground improvement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0853669A true JPH0853669A (en) | 1996-02-27 |
| JP3090301B2 JP3090301B2 (en) | 2000-09-18 |
Family
ID=16263921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06190798A Expired - Fee Related JP3090301B2 (en) | 1994-08-12 | 1994-08-12 | Dust-free solidification material for ground improvement |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3090301B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008239447A (en) * | 2007-03-28 | 2008-10-09 | Kao Corp | Cement-based solidifying material |
| JP2012509835A (en) * | 2008-11-25 | 2012-04-26 | コンストラクション リサーチ アンド テクノロジー ゲーエムベーハー | Use of polyols and cyclohexane polycarboxylic acid derivatives for the dedusting of construction chemicals |
| JP2017178704A (en) * | 2016-03-30 | 2017-10-05 | 太平洋マテリアル株式会社 | Dust emission prevention agent for grout material composition and low dust emission type grout material composition |
| JP2020176045A (en) * | 2019-04-16 | 2020-10-29 | 株式会社日本触媒 | Cement additive, cement hardness improver, cement composition, and hardness improvement method of cement composition |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4823967B2 (en) * | 2007-05-11 | 2011-11-24 | 花王株式会社 | Method for producing cement-based solidified material |
| JP4836005B2 (en) * | 2007-09-06 | 2011-12-14 | 三菱マテリアル株式会社 | Method for producing dust-suppressing hydraulic material |
-
1994
- 1994-08-12 JP JP06190798A patent/JP3090301B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008239447A (en) * | 2007-03-28 | 2008-10-09 | Kao Corp | Cement-based solidifying material |
| JP2012509835A (en) * | 2008-11-25 | 2012-04-26 | コンストラクション リサーチ アンド テクノロジー ゲーエムベーハー | Use of polyols and cyclohexane polycarboxylic acid derivatives for the dedusting of construction chemicals |
| JP2017178704A (en) * | 2016-03-30 | 2017-10-05 | 太平洋マテリアル株式会社 | Dust emission prevention agent for grout material composition and low dust emission type grout material composition |
| JP2020176045A (en) * | 2019-04-16 | 2020-10-29 | 株式会社日本触媒 | Cement additive, cement hardness improver, cement composition, and hardness improvement method of cement composition |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3090301B2 (en) | 2000-09-18 |
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