JPH1025476A - Cement composition for hardening soil etc. - Google Patents
Cement composition for hardening soil etc.Info
- Publication number
- JPH1025476A JPH1025476A JP8201037A JP20103796A JPH1025476A JP H1025476 A JPH1025476 A JP H1025476A JP 8201037 A JP8201037 A JP 8201037A JP 20103796 A JP20103796 A JP 20103796A JP H1025476 A JPH1025476 A JP H1025476A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- parts
- cement
- composition
- hardening
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00732—Uses not provided for elsewhere in C04B2111/00 for soil stabilisation
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Treatment Of Sludge (AREA)
Abstract
(57)【要約】
【課題】 軟弱な土壌を凝結硬化するために、または汚
泥、ヘドロ等の廃棄物を無害の固形物に硬化するために
使用する土壌等硬化用セメント組成物を提供する。
【解決手段】 ポルトランドセメント、早強セメント、
白色セメント、高炉セメント、及びセメント系固化剤類
の何れか１種、又は、それらの混合物１００重量部に対
して、
シリカ微粉 ２０〜５０重量部、
消石灰 ２０〜５０重量部、
塩化マグネシウム、塩化カルシウム及び
ソーダ灰の中少なくとも１種 １５〜５０重量部、
リグニンスルホン酸ソーダ、若しくは
リグニンスルホン酸カリ １５〜５０重量部、
モンモリロナイト １５〜５０重量部及び
ジルコニウム（IV）化合物 １５〜５０重量部
の組成割合の配合物（ａ）を０.７〜３重量部を添加し
てなる土壌等硬化用セメント組成物。PROBLEM TO BE SOLVED: To provide a cement composition for hardening soil and the like which is used for setting and hardening soft soil or hardening waste such as sludge and sludge into harmless solids. [Solution] Portland cement, early strength cement,
20 to 50 parts by weight of silica fine powder, 20 to 50 parts by weight of slaked lime, magnesium chloride, calcium chloride, relative to 100 parts by weight of white cement, blast furnace cement, and cement-based hardeners And 15 to 50 parts by weight of at least one of soda ash, 15 to 50 parts by weight of sodium ligninsulfonate or potassium ligninsulfonate, 15 to 50 parts by weight of montmorillonite, and 15 to 50 parts by weight of a zirconium (IV) compound. A cement composition for hardening soils or the like, which is obtained by adding 0.7 to 3 parts by weight of the composition (a).
Description
【０００１】[0001]
【産業上の利用分野】本発明は、軟弱な土壌を凝結硬化
するために、または汚泥、ヘドロ等の産業廃棄物、都市
廃棄物を無害の固形物に硬化するために使用する土壌等
硬化用セメント組成物に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for setting and hardening soft soil, or for hardening industrial waste such as sludge and sludge and municipal waste into harmless solids. It relates to a cement composition.
【０００２】[0002]
【従来の技術、問題点】本発明者は長年にわたって、土
壌、汚泥の凝結硬化剤、廃棄物の再生処理剤等に関する
研究を続けて来た。その成果の一部は、例えば特公昭４
５−２４９５２号、特公昭４６６７５１号、特公昭５２
−４７４８３号などの特許公報によって公表されてい
る。2. Description of the Related Art The inventor of the present invention has been conducting research on a setting hardener for soil and sludge and a regenerating agent for waste for many years. Some of the results are, for example,
No. 5-24952, Japanese Patent Publication No. 466751, Japanese Patent Publication No. 52
No. 4,748,483.
【０００３】特に、特公昭５２−４７４８３号公報に公
表したセメント組成物は、道路の舗装路盤の安定処理
や、建材用ブロックなどに利用されるものであった。然
しながら、この硬化剤によって、安定処理された舗装用
地盤や土壌等による建築用煉瓦や歩道用インターロッキ
ングブロック等は、強度、吸水性、其の他の性能におい
て、必ずしも、満足出来るものであるとは言い難い点が
あった。[0003] In particular, the cement composition disclosed in Japanese Patent Publication No. 52-47483 has been used for stabilizing paved roadbeds of roads and for building material blocks. However, with this hardener, construction bricks and sidewalk interlocking blocks made of pavement ground and soil that have been stably treated are not necessarily satisfactory in strength, water absorption, and other performance. There was something hard to say.
【０００４】[0004]
【問題点を解決するための手段、作用】本発明は、セメ
ント類の欠点を改良して、従来の凝結硬化剤よりも広く
利用できる、土壌安定処理のため並びに廃棄物再生のた
めの土壌等硬化用セメント組成物を提供する。The present invention improves the disadvantages of cements and can be used more widely than conventional setting hardeners. A hardening cement composition is provided.
【０００５】即ち、本発明の土壌等硬化用セメント組成
物は、ポルトランドセメント、早強セメント、白色セメ
ント、高炉セメント、及びセメント系固化剤類の何れか
１種、又は、それらの混合物１００重量部に対して、 シリカ微粉 ２０〜５０重量部、 消石灰 ２０〜５０重量部、 塩化マグネシウム、塩化カルシウム及び ソーダ灰の中少なくとも１種 １５〜５０重量部、 リグニンスルホン酸ソーダ、若しくは リグニンスルホン酸カリ １５〜５０重量部、 モンモリロナイト １５〜５０重量部及び ジルコニウム（IV）化合物 １５〜５０重量部 の組成割合の配合物（ａ）を０.７〜３重量部添加して
なるものである。That is, the cement composition for hardening soil or the like of the present invention comprises 100 parts by weight of one of Portland cement, early-strength cement, white cement, blast furnace cement, and cement-based solidifying agents, or a mixture thereof. 20 to 50 parts by weight of silica fine powder, 20 to 50 parts by weight of slaked lime, at least one of magnesium chloride, calcium chloride and soda ash 15 to 50 parts by weight, sodium ligninsulfonate or potassium ligninsulfonate 15 to The composition (a) having a composition ratio of 50 parts by weight, 15 to 50 parts by weight of montmorillonite and 15 to 50 parts by weight of a zirconium (IV) compound is added in an amount of 0.7 to 3 parts by weight.
【０００６】特公昭５２−４７４８３号公報に記載され
た発明（以下これを先行発明という）は、ポルトランド
セメントに対して、消石灰及び／又はシリカ微粉１重量
部に対して、塩化マグネシウム及び／又は塩化カルシウ
ム1/3〜１重量部、及びソーダ灰、クロル石灰（サラシ
粉）、塩化亜鉛ならびに亜鉛華よりなる群からえらばれ
た成分1/6〜1/3重量部の組成割合の配合物（Ａ）を２〜
５重量％の割合で含有せしめたものである。これに対し
て本発明は、ポルトランドセメント、早強セメント、白
色セメント、高炉セメント、及びセメント系固化剤類の
何れか１種、又は、それらの混合物１００重量部に対し
て、 シリカ微粉 ２０〜５０重量部、 消石灰 ２０〜５０重量部、 塩化マグネシウム、塩化カルシウム及び ソーダ灰の中少なくとも１種 １５〜５０重量部、 リグニンスルホン酸ソーダ、若しくは リグニンスルホン酸カリ １５〜５０重量部、 モンモリロナイト １５〜５０重量部及び ジルコニウム（IV）化合物 １５〜５０重量部 の組成割合の配合物（ａ）を０.７〜３重量部の割合で
含有せしめたものである。[0006] The invention described in Japanese Patent Publication No. 52-47483 (hereinafter referred to as the prior invention) is characterized in that, for Portland cement, 1 part by weight of slaked lime and / or silica fine powder, and magnesium chloride and / or chloride are used. A composition (A) composed of 1/3 to 1 part by weight of calcium and 1/6 to 1/3 part by weight of a component selected from the group consisting of soda ash, chlor lime (silver powder), zinc chloride and zinc white. ) To 2
The content was 5% by weight. On the other hand, the present invention relates to Portland cement, early-strength cement, white cement, blast-furnace cement, and any one of cement-based solidifying agents, or 100 parts by weight of a mixture thereof, and silica fine powder of 20 to 50 parts. 20 to 50 parts by weight, slaked lime 20 to 50 parts by weight, at least one of magnesium chloride, calcium chloride and soda ash 15 to 50 parts by weight, sodium ligninsulfonate or potassium ligninsulfonate 15 to 50 parts by weight, montmorillonite 15 to 50 parts by weight Parts and a composition (a) having a composition ratio of 15 to 50 parts by weight of a zirconium (IV) compound in an amount of 0.7 to 3 parts by weight.
【０００７】本発明の配合物（ａ）は、先行発明の配合
物（Ａ）とは、特にモンモリロナイト及びジルコニウム
（IV）化合物を含む点で異なっている。また、先行発明
では配合物（Ａ）の添加量が２〜５重量％であるに対し
て、本発明の配合物（ａ）の添加量はセメント１００重
量部当り０.７〜３重量部であり、特に１重量部が好ま
しい。このように添加量が少量であることは輸送費の低
減をもたらし、特に現場施行の際の価格低減に大きく貢
献する。このような輸送費低減の効果は、長距離輸送、
例えば輸出の際に特に顕著である。[0007] Formulation (a) of the present invention differs from formulation (A) of the prior invention in that it particularly comprises a montmorillonite and zirconium (IV) compound. In the prior invention, the amount of the compound (A) is 2 to 5% by weight, whereas the amount of the compound (a) of the present invention is 0.7 to 3 parts by weight per 100 parts by weight of cement. Yes, and particularly preferably 1 part by weight. Such a small amount of addition leads to a reduction in transportation costs, and particularly contributes greatly to a reduction in the price at the time of site implementation. The effect of such transportation cost reduction is long-distance transportation,
This is especially true for exports.
【０００８】珪酸質物質でそれ自身水硬性ではないが、
それの成分中に水分と結合して水に難溶の化合物を作り
硬化する物質を含んでいるものをポゾランという。本発
明の配合物（ａ）中のシリカ微粉及び消石灰は、主とし
て、これを目的としているものであり、長期的に見て、
ポゾランセメントの耐腐食性、海水等に対する抵抗性、
不透水性、アルカリ骨材反応に対する抵抗性等々、幾多
の特徴をもって土粒子の間隔を充填固結するのである。Although it is a siliceous substance and is not hydraulic in itself,
Pozolan is a substance that contains a substance that combines with water to form a compound that is hardly soluble in water and hardens. The silica fine powder and slaked lime in the composition (a) of the present invention are mainly intended for this purpose, and in the long term,
Pozzolan cement's corrosion resistance, resistance to seawater,
The space between the soil particles is filled and consolidated with a number of characteristics, such as water impermeability and resistance to alkali-aggregate reaction.
【０００９】リグニンスルホン酸塩を含んだ水をセメン
トに加えると、セメントのＣａイオンとＨＯＲＳＯ3が
結合してＣａ(ＨＯＲＳＯ3)2を生成する。この時、その
表面の負の電荷を強め、フェノール性ＯＨマイナスイオ
ンはセメント鉱物のＯ2と水素結合すると言われてい
る。この様に、或る時間、丈夫な吸着膜でセメントの粒
子を覆い尽くして、疎水性とすると同時に電荷による反
発力の働きによって、強い分散性と滑動性を発揮して、
減水剤の働きと同時に強度増強の効果をもたらすといわ
れている。When water containing lignin sulfonate is added to cement, Ca ions of cement and HORSO 3 combine to form Ca (HORSO 3 ) 2 . At this time, it is said that the negative charge on the surface is strengthened, and the phenolic OH negative ion forms a hydrogen bond with O 2 of the cement mineral. In this way, for a certain period of time, the cement particles are covered with a strong adsorbent film, making them hydrophobic and simultaneously exhibiting strong dispersibility and sliding properties by the action of repulsion by electric charges.
It is said that the water reducing agent works and at the same time has the effect of strengthening the strength.
【００１０】塩化マグネシウム等は、一般に急結急硬剤
として使用されているものであるが、これらは上記のリ
グニンスルホン酸塩類がセメントの表面を覆って、疎水
性とした為の遅結時間を取り返すために添加する。[0010] Magnesium chloride and the like are generally used as a quick-setting quick-hardening agent, but they have a delay time for the above-mentioned lignin sulfonates to cover the cement surface and make it hydrophobic. Add to regain.
【００１１】又、リグニンスルホン酸ソーダ等は、混和
したセメントモルタル類に保水性を持たせて、セメント
類の水和に、十分な熟成時間を与えることも知られてい
るが、本発明では、モンモリロナイトを加えた事によっ
て、保水性、膨潤性が、共に増強され、被固化物の乾燥
収縮亀裂の発生から一層遠ざかる結果となるのである。It is also known that sodium ligninsulfonate or the like imparts water retention to mixed cement mortars to give sufficient aging time for hydration of cements. The addition of montmorillonite enhances both the water retention and swelling properties, resulting in a further distance from the occurrence of dry shrinkage cracks in the solidified material.
【００１２】モンモリロナイト及びジルコニウム化合物
を使用した配合物（ａ）は、本発明独持のものである。
而も、配合物（ａ）に含まれている様な多くの薬剤を、
ある目的の為に、予め、混合して置いて、１つの混合剤
であるかの様に使用する用法は、本発明独持の手法であ
る。The composition (a) using montmorillonite and a zirconium compound is unique to the present invention.
Also, many drugs such as those contained in formulation (a)
The use of pre-mixed, pre-mixed for certain purposes and used as a single admixture is a unique technique of the present invention.
【００１３】ジルコニウム（IV）化合物中、酸化ジルコ
ニウム（IV）水和物、或は、水酸化ジルコニウム（IV）
水和物は、加水分解或はアルカリの添加によって、白色
ゼラチン状沈殿物を生じ、この沈殿物が本発明による硬
化物の緻密性、耐侯性を増加させているのであろう。更
に、モンモリロン石粉（主としてベントナイト）の添加
による膨潤作用と相まって、その密実効果は増大すると
考えられる。これが先行発明の配合物（Ａ）との相違点
で、本発明の配合物（ａ）の成分の特徴であると言い得
る。即ち、これが、本発明の安定処理用、又は、再生用
硬化物を形成する上に重要な役目を果たしているのであ
る。In the zirconium (IV) compound, zirconium (IV) oxide hydrate or zirconium (IV) hydroxide
The hydrate forms a white gelatinous precipitate upon hydrolysis or addition of an alkali, and this precipitate may increase the compactness and weather resistance of the cured product according to the present invention. Further, it is considered that the solid effect is increased in combination with the swelling effect due to the addition of montmorillonite powder (mainly bentonite). This is a difference from the formulation (A) of the prior invention, and can be said to be a characteristic of the components of the formulation (a) of the invention. That is, this plays an important role in forming the cured product for stabilization or regeneration of the present invention.
【００１４】本発明の配合物（ａ）を添加した硬化剤に
よって処理された土壌乃至廃棄物は、同量のポルトラン
ドセメントによって処理された物に比べて、吸水性の減
少、強度の増強等、優れている事が実験によって明らか
に成り、これが、耐侯性を増強する結果となったと考え
る事ができるのである。[0014] The soil or waste treated with the hardener to which the composition (a) of the present invention is added has reduced water absorption, increased strength, etc., as compared with those treated with the same amount of Portland cement. The superiority is evident from the experiments, which can be attributed to the increased weather resistance.
【００１５】[0015]
【実施例】次に本発明を実施例に従って更に詳しく説明
する。Next, the present invention will be described in more detail with reference to examples.
【００１６】［実施例１〜２、比較例１〜５］シリカ微
粉２０重量部、消石灰粉末２０重量部、塩化マグネシウ
ム１５重量部、リグニンスルホン酸ソーダ１５重量部、
モンモリロナイト１５重量部及び水酸化ジルコニウム
（IV）１５重量部を配合して配合物（ａ1）を得た。一
方シリカ粉及び消石灰粉の１：１混合物１５重量部、塩
化マグネシウム１０重量部、ソーダ灰５重量部及びトリ
ポリ燐酸ソーダ５重量部を配合して配合物（Ａ1）を得
た。Examples 1 and 2, Comparative Examples 1 to 5 20 parts by weight of fine silica powder, 20 parts by weight of slaked lime powder, 15 parts by weight of magnesium chloride, 15 parts by weight of sodium ligninsulfonate,
15 parts by weight of montmorillonite and 15 parts by weight of zirconium (IV) hydroxide were blended to obtain a blend (a 1 ). On the other hand, 15 parts by weight of a 1: 1 mixture of silica powder and slaked lime powder, 10 parts by weight of magnesium chloride, 5 parts by weight of soda ash and 5 parts by weight of sodium tripolyphosphate were blended to obtain a blend (A 1 ).
【００１７】ポルトランドセメント１００重量部に対し
て配合物（ａ1）を１重量部及び２重量部を添加して夫
々に実施例１及び２の組成物を得た。またポルトランド
セメント１００重量部に対して配合物（Ａ1）を１重量
部、２重量部、３重量部及び４重量部を添加して夫々に
比較例１、２、３及び４の組成物を得た。また配合物
（ａ1）又は（Ａ１）を添加しないポルトランドセメン
トのみからなる組成物を比較例５に示す。The compositions of Examples 1 and 2 were obtained by adding 1 part by weight and 2 parts by weight of the compound (a 1 ) to 100 parts by weight of Portland cement, respectively. Further, 1 part by weight, 2 parts by weight, 3 parts by weight, and 4 parts by weight of the compound (A 1 ) were added to 100 parts by weight of Portland cement, and the compositions of Comparative Examples 1, 2, 3, and 4 were respectively added. Obtained. Comparative Example 5 shows a composition consisting of only Portland cement to which no compound (a 1 ) or (A1) was added.
【００１８】砂分４８％、シルト分３８％、粘土分１４
％からなる関東ローム１００重量部に対して、最適含水
比（２０％）において、実施例１〜２及び比較例１〜５
の組成物を８重量部混入、転圧成形した試料について一
軸圧縮強さを測定した。結果を表１に示す。Sand 48%, Silt 38%, Clay 14
% And 100 to 100 parts by weight of Kanto loam containing 20% by weight of Examples 1-2 and Comparative Examples 1-5.
The composition was mixed with 8 parts by weight, and the uniaxial compression strength was measured for a sample formed by rolling. Table 1 shows the results.
【００１９】[0019]
【表１】 [Table 1]
【００２０】一軸圧縮強さは、セメント安定処理土の一
軸圧縮試験法に準じて測定した。The unconfined compressive strength was measured according to the unconfined compression test method of the cement stabilized soil.
【００２１】表１によれば、実施例１及び２では配合物
（ａ1）を１重量部添加した実施例１の方が、配合物
（ａ1）を２重量部添加した実施例２よりも一軸圧縮強
さが大きい、また比較例１〜４では配合物（Ａ1）を３
重量部添加した比較例３が最も大きい一軸圧縮強さを示
している。しかも実施例１〜２の方が比較例１〜４に比
べて一軸圧縮強さが大である。また配合物（ａ1）又は
（Ａ1）を添加しなかった比較例５が最低値を示してい
る。According to Table 1, from Example 1 and the 2 Formulation (a 1) a better of Example 1 was added 1 part by weight, the formulation (a 1) Example 2 was added 2 parts by weight Also have large uniaxial compressive strength, and in Comparative Examples 1-4, the blend (A 1 )
Comparative Example 3, in which parts by weight were added, showed the largest uniaxial compressive strength. Moreover, Examples 1 and 2 have higher uniaxial compressive strength than Comparative Examples 1 to 4. Comparative Example 5 in which the compound (a 1 ) or (A 1 ) was not added showed the lowest value.
【００２２】実施例１、実施例２及び比較例５の組成物
を、上記関東ローム（最適含水ee）に８％混入して、一
軸圧縮強さ測定用のモールドによって転圧成形した被安
定処理土の保水性と測定した結果を表２に示す。8% of the compositions of Examples 1, 2 and Comparative Example 5 were mixed with the above Kanto loam (optimum water content ee) and subjected to rolling treatment using a mold for measuring uniaxial compressive strength. Table 2 shows the results of measuring the water retention of the soil.
【００２３】[0023]
【表２】 [Table 2]
【００２４】表２の数値は、製作時の水分量を１００％
として、空気中で乾燥養生をした時のそれぞれの経日に
於ける残存水量を表している。配合物（ａ1）２％添加
の場合が、最も保水性がある様に現れているが、１％添
加の場合より、配合物（ａ1）を２倍使用してこの程度
の差（測定誤差範囲）であれば、経済性から見て、１％
添加を採用すべきであると考える。含水量が、セメント
の２５％程度以上である間は、水和反応が継続出来ると
考えれば、セメント単身のコンクリートでは７日目には
３０％以下となって仕舞っている事から、間もなく水和
反応が停止するであろうと考えられる。配合物（ａ1）
添加の場合は７日経過しても未だ６０％代の含水量であ
ることから、セメント単身のコンクリート（比較例５）
の三日目に近い含水量である。本発明によるコンクリー
トは、長期に水和反応を続け、強度の増進を継続するで
あろう事を推定出来る。The numerical values in Table 2 indicate that the water content at the time of production is 100%.
Represents the amount of residual water in each day when dry curing is performed in the air. The case of adding 2% of the formulation (a 1 ) appears to have the most water retention, but the difference of this degree (measurement) was obtained by using twice the formulation (a 1 ) than the case of adding 1%. Error range), 1%
We think that addition should be adopted. Assuming that the hydration reaction can be continued while the water content is about 25% or more of the cement, concrete on the cement alone is less than 30% on the 7th day, so it will be hydrated soon. It is believed that the reaction will stop. Formulation (a 1 )
In the case of addition, since the water content is still 60% even after 7 days, concrete with only cement (Comparative Example 5)
The water content is close to the third day. It can be estimated that the concrete according to the invention will continue the hydration reaction for a long time and will continue to increase in strength.
【００２５】一軸圧縮試験を実施したテストピース（高
さ：１０ｃｍ）を使用して、空気養生６日目の高さの減
少値を１０００分のｍｍまで測定出来るマイクロメータ
で測定した。結果を表１に示す。表１の数値は減少（収
縮）した長さである。Using a test piece (height: 10 cm) on which a uniaxial compression test was performed, a decrease in height on the 6th day of air curing was measured with a micrometer capable of measuring up to 1000 mm. Table 1 shows the results. The values in Table 1 are the reduced (shrinked) lengths.
【００２６】１０００分の１代の数値は、正確であると
は言い難い点があるが、実施例１と実施例２とは殆ど差
が無く、比較例３よりは収縮量が少ない事が判った。比
較例の組成物は、これを使用すれば、収縮亀裂が減少す
る事を特徴の一つにしていたのであるが、本発明による
組成物は更に約１.６分の１の収縮であるから、一層収
縮亀裂の発生は減少することになる。Although it is difficult to say that the value of the 1 / 1000th is accurate, there is almost no difference between Example 1 and Example 2 and it is understood that the contraction amount is smaller than that of Comparative Example 3. Was. One of the features of the composition of the comparative example is that shrinkage cracking is reduced when this composition is used, but the composition according to the present invention further shrinks by about 1.6 times. The occurrence of shrinkage cracks is further reduced.
【００２７】実施例１、２及び比較例５のテストピース
を、６日空気養生後１日水浸して、その時の吸水率を次
式に従って算出した。The test pieces of Examples 1 and 2 and Comparative Example 5 were immersed in water for 1 day after air curing for 6 days, and the water absorption at that time was calculated according to the following equation.
【００２８】[0028]
【数１】 (Equation 1)
【００２９】結果を表１に示す。The results are shown in Table 1.
【００３０】耐凍結性、耐候性等は吸水性に関係が深
く、重要な性質である。Freezing resistance, weather resistance and the like are closely related to water absorption and are important properties.
【００３１】配合物（ａ）の添加量が増加すると、傾向
としては良い方向に向く事は、吸水率の場合にも現れて
いるが、添加量が１％以上では、配合物の増加の割合に
は、効果が少ない事が明瞭である。故に、通常はセメン
トに発明の配合物（ａ）を１％添加する事が好ましい。The fact that the addition amount of the compound (a) increases, which tends to be in a good direction, also appears in the case of the water absorption, but when the addition amount is 1% or more, the rate of increase of the compound is Is clearly less effective. Therefore, it is usually preferable to add 1% of the compound (a) of the present invention to cement.
【００３２】含水比の高いヘドロ類に対しては、一般に
は、高炉セメントに石膏を加えた「セメント系固化剤」
を使用する。理論的には、半水石膏、ポルトランドセメ
ント、高炉スラグを１：３：３.５の割合に混合したセ
メントが、水和によって３ＣａＯ・Ａ１2Ｏ3・３ＣａＳ
Ｏ4・３２Ｈ2Ｏの化学成分をもった「エトリンガイト」
が最も多く生成するのである。For sludge having a high water content, generally, a "cement-based solidifying agent" is obtained by adding gypsum to blast furnace cement.
Use Theoretically, hemihydrate gypsum, Portland cement, blast furnace slag 1: 3: 3.5 Cement mixed in proportions of, 3CaO · A1 2 O 3 · 3CaS by hydration
“Ettringite” with the chemical composition of O 4・ 32H 2 O
Is generated most often.
【００３３】一般に、含水比の高い粘性土から水分を取
り除くには、生石灰或は焼石膏等を混合する。生石灰の
場合は、ＣａＯ＋Ｈ2Ｏ＝Ｃａ(ＯＨ)2の反応によって生
石灰１に対して水０.３２を吸収するのである。焼石膏
は、ＣａＳＯ4(１／２)Ｈ2Ｏが、ＣａＳＯ4２Ｈ2Ｏとな
って、焼石膏１に対して０.１９の水を吸収するのであ
る。ところが、このエトリンガイトの結晶の生成によれ
ば、０.８５の吸収であることから、その効果は大き
い。更に、エトリンガイトは嵩高な結晶である事から、
これが生成は、間隙比の大きい粘性土には、最適の鉱物
であるといい得る。砂質土に対しては、この膨潤性が仇
となって、コンクリートが破壊する事があるので注意が
必要である。然しながら、セメントに対して、石膏の含
有量が６％以下であれば、セメントの規格では３％以下
と成っているが、実験によれば、膨張破壊に対して、実
用上安全である。Generally, in order to remove water from cohesive soil having a high water content, quicklime or calcined gypsum is mixed. If quicklime is to absorb water 0.32 against quicklime 1 by reaction of CaO + H 2 O = Ca ( OH) 2. In calcined gypsum, CaSO 4 (() H 2 O is converted into CaSO 4 2H 2 O to absorb 0.19 water per calcined gypsum 1. However, according to the generation of the ettringite crystals, the absorption is 0.85, so that the effect is large. Furthermore, since ettringite is a bulky crystal,
This can be said to be the optimal mineral for cohesive soils with a high porosity. For sandy soils, care must be taken because this swelling can be an enemy and concrete can be destroyed. However, if the gypsum content is 6% or less with respect to the cement, the cement standard is 3% or less, but according to experiments, it is practically safe against expansion failure.
【００３４】前述のセメント系固化剤に、発明の配合物
（ａ）を１％混合すると、セメント同様に、分散効果、
密実化等種々の効果をもたらすのである。前述の、従来
の固化剤とこのセメント系固化剤とによって、含水比の
大きい粘性土を処理して見ると、次の様な相違が現れ
る。When 1% of the compound (a) of the present invention is mixed with the above-mentioned cement-based solidifying agent, the dispersing effect and
Various effects such as densification are brought about. When the cohesive soil having a large water content is treated with the conventional solidifying agent and the cement-based solidifying agent described above, the following differences appear.
【００３５】安定処理を実施した粘性土は、自然含水比
＝８２.７％、単位体積重量＝１.４７ｔ／ｍ3であり、
この土に１ｍ3当たり、１００ｋｇ及び１５０ｋｇを添
加した場合の一週強度、一軸圧縮強さを比較する。（一
軸圧縮強さが、改良土の性質を代表していると考え
る。）結果を表３に示す。The cohesive soil subjected to the stabilization treatment has a natural water content of 82.7% and a unit volume weight of 1.47 t / m 3 .
One week strength and uniaxial compressive strength when 100 kg and 150 kg per 1 m 3 are added to this soil are compared. (The uniaxial compressive strength is considered to represent the properties of the improved soil.) The results are shown in Table 3.
【００３６】[0036]
【表３】 [Table 3]
【００３７】明らかに脱水効果を認めなければならな
い。しかし、本発明のセメント系固化剤及び従来の固化
剤は、共に、含有する石膏を使い果たして仕舞った後
は、前述の様に、保水性を持っていて、長期にセメント
粒子を熟成させるだけの水分を保留し、年月の経過と共
に、１週強度の２〜３倍の強さにまで成長する事等は珍
しいことでは無い。この点が、単身のセメントと大いに
異なる点である。The dehydration effect must clearly be recognized. However, after the cement-based solidifying agent of the present invention and the conventional solidifying agent both run out of gypsum contained therein, as described above, they have water retention and only mature the cement particles for a long period of time. It is not unusual for water to be retained and to grow to 2-3 times the intensity of one week over time. This is a major difference from single cement.
【００３８】尚、アスファルト舗装要綱に示されている
路盤の強度は、一軸圧縮強さ（ｑｕ）１週で３０ｋｇｆ
／ｃｍ2である。本発明の組成物では、ｑｕ＝３０ｋｇ
ｆ／ｃｍ2とするためには、６重量％の添加で十分であ
ることが分っている。このことから、先行発明の組成物
以上に、固化力があり、経済的であることになる。これ
は本発明の大きな利点である。The strength of the roadbed indicated in the asphalt pavement outline is 30 kgf per week in uniaxial compressive strength (qu).
/ Cm 2 . In the composition of the present invention, qu = 30 kg
It has been found that the addition of 6% by weight is sufficient to obtain f / cm 2 . This means that it has more solidifying power and is more economical than the composition of the prior invention. This is a great advantage of the present invention.
【００３９】先行発明の組成物において、追跡調査の結
果、７日強度＝３０ｋｇｆ／ｃｍ2に調整した路盤が、
２８日強度では４９ｋｇｆ／ｃｍ2となり、約３年後に
は、１００ｋｇｆ／ｃｍ2を得ていた。これは、丁度、
ソウルの式｛Ｒ＝Ａｔ（ｔ＋１０）｝で平均温度を２０
℃とした場合に、当てはまるのである。In the composition of the prior invention, as a result of a follow-up survey, the roadbed adjusted to 7-day strength = 30 kgf / cm 2
The 28-day strength was 49 kgf / cm 2 , and about 3 years later, 100 kgf / cm 2 was obtained. This is exactly
Seoul equation {R = At (t + 10)} gives average temperature of 20
This is true when the temperature is set to ° C.
【００４０】ここに、Ｒ：熟成度 Ａｔ：平均養生温度ｔ℃における養生期間 ｔ：平均養生温度（℃） 実測値から（ｑｕ−Ａｔ）ｏｒ（ｑｕ−Ｒ）曲線を片対
数グラフ（Ａｔ ｏｒＲを対数目盛り）にプロットする
と、ｑｕ−Ａｔ曲線とｑｕ−Ｒ曲線は直線で、而も、平
衡になる。７日強度＝３０ｋｇｆ／ｃｍ2及び２８日強
度＝４９ｋｇｆ／ｃｍ2の両点を結んで延長すると、グ
ラフの上でも、３年≒１０００日では、９８ｋｇｆ／ｃ
ｍ2を得るのである。この事は、３年もの間、セメント
が水和するだけの水分を固化剤が何らかの形で補給して
いる事を物語っているのである。これを一口に、保水性
と言っているが、本発明の組成物は、前述の通り、先行
発明の組成物以上に、保水性を持っている事から、一
層、長期の安定性を期待出来るものと考えられる。Here, R: degree of ripening At: curing period at average curing temperature t ° C. t: average curing temperature (° C.) From the measured value, the (qu-At) or (qu-R) curve is semi-logarithmic (At or R) Is plotted on a logarithmic scale), the qu-At curve and the qu-R curve are straight lines and also equilibrium. When connecting by extending the both points of 7 days strength = 30 kgf / cm 2 and 28 days strength = 49kgf / cm 2, even the top of the graph, in three years ≒ 1000 days, 98kgf / c
It is to obtain a m 2. This indicates that for three years, the solidifying agent replenished the cement in some way with enough water to hydrate the cement. Although this is referred to as water retention, the composition of the present invention has more water retention than the composition of the prior invention as described above, so that long-term stability can be expected. It is considered something.
【００４１】[0041]
【発明の効果】本発明の土壌等硬化用セメント組成物
は、土壌安定処理並びに廃棄物再生のために広く利用す
ることができ、処理された土壌等に対して、従来のこの
種の組成物に比べて、優れた強度、吸水性その他の性能
を付与することができる。また、本発明の組成物は、従
来の組成物に比べて、少量の使用量で十分であり、従っ
て原料費及び輸送費を低減することができる。Industrial Applicability The cement composition for hardening soil and the like of the present invention can be widely used for soil stabilization treatment and waste regeneration, and can be applied to a treated soil or the like with a conventional composition of this type. As compared with the above, excellent strength, water absorption and other properties can be imparted. In addition, the composition of the present invention requires a smaller amount of use than conventional compositions, and thus can reduce raw material costs and transportation costs.
───────────────────────────────────────────────────── 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 Ｃ０４Ｂ 22/06 Ｃ０４Ｂ 22/06 22/12 22/12 24/18 24/18 Ａ 28/02 28/02 Ｃ０９Ｋ 17/48 Ｃ０９Ｋ 17/48 Ｐ // Ｃ０９Ｋ 103:00 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification code Agency reference number FI Technical indication location C04B 22/06 C04B 22/06 22/12 22/12 24/18 24/18 A 28/02 28 / 02 C09K 17/48 C09K 17/48 P // C09K 103: 00
Claims (1)
白色セメント、高炉セメント、及びセメント系固化剤類
の何れか１種、又は、それらの混合物１００重量部に対
して、 シリカ微粉 ２０〜５０重量部、 消石灰 ２０〜５０重量部、 塩化マグネシウム、塩化カルシウム及び ソーダ灰の中少なくとも１種 １５〜５０重量部、 リグニンスルホン酸ソーダ、若しくは リグニンスルホン酸カリ １５〜５０重量部、 モンモリロナイト １５〜５０重量部及び ジルコニウム（IV）化合物 １５〜５０重量部 の組成割合の配合物（ａ）を０.７〜３重量部を添加し
てなる土壌等硬化用セメント組成物。1. Portland cement, early strength cement,
20 to 50 parts by weight of silica fine powder, 20 to 50 parts by weight of slaked lime, magnesium chloride, calcium chloride, relative to 100 parts by weight of white cement, blast furnace cement, and cement-based hardeners And 15 to 50 parts by weight of at least one of soda ash, 15 to 50 parts by weight of sodium ligninsulfonate or potassium ligninsulfonate, 15 to 50 parts by weight of montmorillonite, and 15 to 50 parts by weight of a zirconium (IV) compound. A cement composition for hardening soils or the like, which is obtained by adding 0.7 to 3 parts by weight of the composition (a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8201037A JPH1025476A (en) | 1996-07-12 | 1996-07-12 | Cement composition for hardening soil etc. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8201037A JPH1025476A (en) | 1996-07-12 | 1996-07-12 | Cement composition for hardening soil etc. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1025476A true JPH1025476A (en) | 1998-01-27 |
Family
ID=16434391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8201037A Pending JPH1025476A (en) | 1996-07-12 | 1996-07-12 | Cement composition for hardening soil etc. |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1025476A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001316161A (en) * | 2000-04-28 | 2001-11-13 | Tomio Ushida | Architectural or architectural compositions |
| JP2001323265A (en) * | 2000-05-12 | 2001-11-22 | Jiro Fujimasu | Stably solidifying composition for viscous soil, or the like |
| KR100492291B1 (en) * | 2002-10-24 | 2005-05-30 | 고준영 | Material For Solidifying Soil having breaking resistance, Solid Body and Leeve and Dam using the Same |
| JP2007160193A (en) * | 2005-12-13 | 2007-06-28 | Tatsutoshi Komatsu | Rapid dehydrating solidifying agent for treatment of high water content concentrated sludge |
| JP2007216078A (en) * | 2005-12-01 | 2007-08-30 | Nippon Kankyo Sekkei Kk | Treatment method of harmful waste and harmful matter sealing and solidifying agent |
| CN100396637C (en) * | 2004-02-02 | 2008-06-25 | 保科国际有限公司 | Pavement-protecting reinforcing material |
| JP2009286655A (en) * | 2008-05-29 | 2009-12-10 | Takemoto Oil & Fat Co Ltd | Powdery premixed cement composition for foundation improvement |
| CN110668747A (en) * | 2019-09-16 | 2020-01-10 | 上海市环境科学研究院 | Recycled regeneration material for treating polluted bottom mud and preparation method thereof |
| CN111094511A (en) * | 2017-09-27 | 2020-05-01 | 东丽株式会社 | Anti-caking agent for soil |
-
1996
- 1996-07-12 JP JP8201037A patent/JPH1025476A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001316161A (en) * | 2000-04-28 | 2001-11-13 | Tomio Ushida | Architectural or architectural compositions |
| JP2001323265A (en) * | 2000-05-12 | 2001-11-22 | Jiro Fujimasu | Stably solidifying composition for viscous soil, or the like |
| KR100492291B1 (en) * | 2002-10-24 | 2005-05-30 | 고준영 | Material For Solidifying Soil having breaking resistance, Solid Body and Leeve and Dam using the Same |
| CN100396637C (en) * | 2004-02-02 | 2008-06-25 | 保科国际有限公司 | Pavement-protecting reinforcing material |
| JP2007216078A (en) * | 2005-12-01 | 2007-08-30 | Nippon Kankyo Sekkei Kk | Treatment method of harmful waste and harmful matter sealing and solidifying agent |
| JP2007160193A (en) * | 2005-12-13 | 2007-06-28 | Tatsutoshi Komatsu | Rapid dehydrating solidifying agent for treatment of high water content concentrated sludge |
| JP2009286655A (en) * | 2008-05-29 | 2009-12-10 | Takemoto Oil & Fat Co Ltd | Powdery premixed cement composition for foundation improvement |
| CN111094511A (en) * | 2017-09-27 | 2020-05-01 | 东丽株式会社 | Anti-caking agent for soil |
| US11091698B2 (en) | 2017-09-27 | 2021-08-17 | Toray Industries, Inc. | Anti-caking agent for soil |
| CN110668747A (en) * | 2019-09-16 | 2020-01-10 | 上海市环境科学研究院 | Recycled regeneration material for treating polluted bottom mud and preparation method thereof |
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