JP2017165628A - Quick hardening grout composition - Google Patents
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Abstract
Description
本発明は、速硬性グラウト組成物に関する。 The present invention relates to a fast-curing grout composition.
土木構造物や建築構造物の構築又は補修、或いは機械の設置等において、流動性の高いセメント系グラウト材が用いられている。道路や鉄道等の構造物の補修工事等のように工事できる時間が限られている場合は、グラウト材の充填後速やかに強度発現するグラウト材の使用が望まれていることもあり、速硬性のグラウト材が提案されている。
近年、土木・建築構造物に使用されるグラウト材料に要求される性能が高度化してきており、可使時間の確保、強度度発現性及び無収縮性等について検討がなされてきた。従来のグラウト材は既設構造物との一体化を図る為に、初期の膨張性、即ち無収縮性が付与されているものが多い。初期の膨張性を付与するために発泡成分としてアルミニウム粉末、あるいは過炭酸ナトリウム等を配合したグラウト材が提案されている（例えば特許文献１，２参照）。また、良好な短期強度発現性を得るために、特定の急硬成分にアルミン酸ナトリウム、無機炭酸塩及び凝結調整剤を混和したグラウト材が提案されている（例えば特許文献３参照）。
Cement-type grout materials with high fluidity are used in the construction or repair of civil engineering structures and building structures, or in the installation of machines. If the time available for construction, such as repair work for roads, railways, etc., is limited, the use of a grout material that quickly develops strength after filling with the grout material may be desired. Grout materials have been proposed.
In recent years, the performance required for grout materials used in civil engineering and building structures has been advanced, and studies have been made on securing usable time, strength development, non-shrinkage, and the like. Many of the conventional grout materials are given initial expansibility, that is, non-shrinkage in order to integrate with existing structures. A grout material in which aluminum powder, sodium percarbonate or the like is blended as a foaming component in order to impart initial expansibility has been proposed (see, for example, Patent Documents 1 and 2). Further, in order to obtain good short-term strength development, a grout material in which sodium aluminate, an inorganic carbonate and a setting modifier are mixed with a specific rapid hardening component has been proposed (see, for example, Patent Document 3).
しかしながら、初期強度発現性の良好な速硬性のグラウト材においても、速硬性とともに比較的長い可使時間（流動性が保持される時間）が要求されるケースがある。速硬性のグラウト材の場合、２０℃の常温では安定した可使時間を確保することができても、３０℃以上の夏場の高温時期においては充分な可使時間を設定することが困難である。一般には、２０℃環境下において、クエン酸等の遅延剤の添加等によって可使時間を調整することが可能だが、３０℃以上の高温環境下においては、遅延剤の添加量を増やしても可使時間の確保は２０℃環境下ほどの効果がなく、反ってセメントの水和が遅延して速硬性が得られなくなる恐れがある。
本発明は、夏場等の高温の環境においても、所定の可使時間を確保した上で、良好な初期強度発現性が得られる速硬性グラウト組成物を提供することを課題とする。
However, even a fast-hardening grout material with good initial strength development may require a relatively long pot life (time for maintaining fluidity) in addition to fast-hardening. In the case of a fast-hardening grout material, it is difficult to set a sufficient pot life at a high temperature of 30 ° C. or higher in summer, even if a stable pot life can be secured at a room temperature of 20 ° C. . In general, it is possible to adjust the pot life in a 20 ° C environment by adding a retarder such as citric acid. However, in a high temperature environment of 30 ° C or higher, the amount of retarder can be increased. Securing the working time is not as effective as in a 20 ° C. environment, and on the other hand, there is a risk that the hydration of the cement will be delayed and quick hardening cannot be obtained.
It is an object of the present invention to provide a fast-hardening grout composition that can obtain a good initial strength development property while ensuring a predetermined pot life even in a high-temperature environment such as summer.
そこで、本発明者は、前記課題を解決すべく種々の検討を重ねた結果、速硬性グラウト材料の骨材量を調整するとともに、一定量の増粘剤及び凝結遅延剤を組み合わせて配合することにより、所定の可使時間を確保した上で、良好な初期強度発現性が有する速硬性グラウト組成物が得られることを見出し、本発明を完成した。 Accordingly, as a result of various studies to solve the above problems, the present inventor adjusts the aggregate amount of the fast-hardening grout material and mixes a certain amount of thickener and setting retarder in combination. As a result, it was found that a fast-curing grout composition having good initial strength development property was obtained while securing a predetermined pot life, and the present invention was completed.
すなわち、本発明は、次の〔１〕〜〔４〕を提供するものである。
〔１〕セメント、カルシウムアルミネート類、石膏、凝結遅延剤、増粘剤、減水剤及び骨材を含有し、前記セメント、カルシウムアルミネート類及び石膏を含有する結合材１００質量部に対して、増粘剤の含有量が０．０１〜０．１質量部、凝結遅延剤の含有量が０．３〜１．５質量部、及び骨材の含有量が１０５〜１７５質量部である速硬性グラウト組成物。
〔２〕更に、炭酸ナトリウム、炭酸カリウム及び炭酸リチウムから選ばれる一種又は二種のアルカリ金属炭酸塩を含有する〔１〕に記載の速硬性グラウト組成物。
〔３〕前記セメント、カルシウムアルミネート類及び石膏を含有する結合材１００質量部に対して、水の量が３５〜４２質量部である〔１〕又は〔２〕に記載の速硬性グラウト組成物を用いた速硬性グラウト材。
That is, the present invention provides the following [1] to [4].
[1] containing cement, calcium aluminate, gypsum, setting retarder, thickener, water reducing agent and aggregate, and 100 parts by mass of the binder containing the cement, calcium aluminate and gypsum, Fast hardening with 0.01 to 0.1 parts by weight of thickener, 0.3 to 1.5 parts by weight of setting retarder, and 105 to 175 parts by weight of aggregate Grout composition.
[2] The fast-setting grout composition according to [1], further comprising one or two alkali metal carbonates selected from sodium carbonate, potassium carbonate, and lithium carbonate.
[3] The fast-setting grout composition according to [1] or [2], wherein the amount of water is 35 to 42 parts by mass with respect to 100 parts by mass of the binder containing the cement, calcium aluminate, and gypsum. A fast-hardening grout material.
本発明によれば、グラウト材としたときに、夏場等の高温の環境においても、充分な可使時間を確保した上で、良好な初期強度発現性が付与できる速硬性グラウト組成物が得られる。 According to the present invention, when a grout material is used, a quick-hardening grout composition capable of imparting good initial strength can be obtained after securing a sufficient pot life even in a high-temperature environment such as summer. .
本発明の速硬性グラウト組成物は、セメント、カルシウムアルミネート類、石膏、凝結遅延剤、増粘剤、減水剤及び骨材を含有し、かつ、前記セメント、カルシウムアルミネート類及び石膏を含有する結合材１００質量部に対して、増粘剤の含有量が０．０１〜０．１質量部、凝結遅延剤の含有量が０．３〜１．５質量部及び骨材の含有量が１０５〜１７５質量部であることを特徴とする。 The quick-setting grout composition of the present invention contains cement, calcium aluminate, gypsum, setting retarder, thickener, water reducing agent and aggregate, and contains the cement, calcium aluminate and gypsum. The content of the thickener is 0.01 to 0.1 parts by mass, the content of the setting retarder is 0.3 to 1.5 parts by mass, and the content of the aggregate is 105 with respect to 100 parts by mass of the binder. It is ˜175 parts by mass.
本発明で言う速硬性とは、材齢４時間において１０Ｎ／ｍｍ２以上の圧縮強度を発現する性能を持つものを言う。 The fast curing referred to in the present invention means that having the ability to express a compressive strength of 10 N / mm 2 or more at a material age of 4 hours.
本発明で用いるセメントとしては、普通、早強、超早強、低熱及び中庸熱等の各種ポルトランドセメント、エコセメント、並びにこれらポルトランドセメント又はエコセメントに、フライアッシュ、高炉スラグ、シリカフューム又は石灰石微粉末等を混合した各種混合セメント等が挙げられ、これらを一種単独で又は二種以上併用して用いることができる。ここで言うセメントは、カルシウムアルミネート類等の急硬成分を主体とするセメント、例えばアルミナセメント並びに太平洋セメント社製「スーパージェットセメント」（商品名）や住友大阪セメント社製「ジェットセメント」（商品名）等の超速硬セメントは含まれず、これらはカルシウムアルミネート類に含まれる。可使時間が長く且つ初期の強度発現が高いことから、セメントとして普通ポルトランドセメント又は早強ポルトランドセメント或いは普通ポルトランドセメント及び早強ポルトランドセメントを混合したものが好ましい。 As the cement used in the present invention, various portland cements such as normal, early strength, super early strength, low heat and moderate heat, ecocement, and portland cement or ecocement, fly ash, blast furnace slag, silica fume, or limestone fine powder are used. Various mixed cements and the like mixed together can be used, and these can be used alone or in combination of two or more. The cement here refers to cements mainly composed of rapid hardening components such as calcium aluminates, such as alumina cement and “Super Jet Cement” (trade name) manufactured by Taiheiyo Cement Co., Ltd. and “Jet Cement” (commercial product) manufactured by Sumitomo Osaka Cement Co., Ltd. Name) and the like are not included, and these are included in calcium aluminates. Since the pot life is long and the initial strength development is high, ordinary Portland cement or early strength Portland cement or a mixture of ordinary Portland cement and early strength Portland cement is preferable.
本発明で用いるカルシウムアルミネート類としては、ＣａＯをＣ、Ａｌ２Ｏ３をＡ、Ｎａ２ＯをＮ、及びＦｅ２Ｏ３をＦとして表したとき、Ｃ３Ａ、Ｃ２Ａ、Ｃ１２Ａ７、Ｃ５Ａ３、ＣＡ、Ｃ３Ａ５、又はＣＡ２等と表示される鉱物組成を有するカルシウムアルミネート、Ｃ２ＡＦ及びＣ４ＡＦ等と表示されるカルシウムアルミノフェライト、カルシウムアルミネートにフッ素等のハロゲンが固溶又は置換したカルシウムハロアルミネート、Ｃ８ＮＡ３やＣ３Ｎ２Ａ５等と表示されるカルシウムナトリウムアルミネート、カルシウムリチウムアルミネート、アルミナセメント、太平洋セメント社製「スーパージェットセメント」（商品名）や住友大阪セメント社製「ジェットセメント」（商品名）等の超速硬セメント、並びにＣ３Ａ３・ＣａＳＯ４等と表示されるカルシウムサルホアルミネートを総称するものである。このカルシウムアルミネート類は、結晶質のもの、非晶質のもの及び非晶質と結晶質が混在したもののいずれも使用可能であり、特に非晶質を含むものを使用することが好ましい。前記カルシウムアルミネート類のうち一種又は二種以上を使用することが可能である。本発明で使用するカルシウムアルミネート類としては、カルシウムアルミネートが好ましく、アルミナセメントがより好ましい。 Calcium aluminates used in the present invention are represented by C 3 A, C 2 A, C 12 , when CaO is C, Al 2 O 3 is A, Na 2 O is N, and Fe 2 O 3 is F. Calcium aluminate having a mineral composition represented as A 7 , C 5 A 3 , CA, C 3 A 5 , or CA 2, calcium aluminoferrite or calcium aluminate represented as C 2 AF, C 4 AF, or the like Calcium haloaluminate in which halogen such as fluorine is dissolved or substituted, calcium sodium aluminate indicated as C 8 NA 3 or C 3 N 2 A 5 , calcium lithium aluminate, alumina cement, manufactured by Taiheiyo Cement Co., Ltd. Super fast cement cement such as “Super Jet Cement” (trade name) and “Jet Cement” (trade name) manufactured by Sumitomo Osaka Cement Co., Ltd. And calcium sulfoaluminate represented as C 3 A 3 · CaSO 4 or the like. As the calcium aluminates, any of crystalline ones, amorphous ones and a mixture of amorphous and crystalline ones can be used, and it is particularly preferable to use one containing amorphous. One or more of the calcium aluminates can be used. Calcium aluminate used in the present invention is preferably calcium aluminate, and more preferably alumina cement.
本発明においてカルシウムアルミネート類の含有量は、速硬性及び可使時間との両立の点から、特に高温での性状を考慮するとセメント１００質量部に対して５〜５０質量部が好ましく、１０〜３０質量部がより好ましい。 In the present invention, the content of the calcium aluminate is preferably 5 to 50 parts by mass with respect to 100 parts by mass of cement, particularly considering the properties at high temperature, from the viewpoint of compatibility between fast curing and pot life. 30 parts by mass is more preferable.
本発明で用いる石膏としては、無水石膏、二水石膏又は半水石膏を主成分とする粉末であれば特に限定されないが、強度増進作用の観点からＩＩ型無水石膏を主成分とするものが好ましい。石膏は、セメント中のアルミネート相及びカルシウムアルミネート類等と反応しエトリンガイト（３ＣａＯ・Ａｌ２Ｏ３・３ＣａＳＯ４・３２Ｈ２Ｏ）を生成させ、これにより速硬性が得られるとともに、グラウト硬化体の収縮を抑制することができる。使用する石膏の粉末度はブレーン法による比表面積で３０００ｃｍ２／ｇ以上のものが、反応活性が得られるので好ましい。より好ましくは粉末度が６０００ｃｍ２／ｇ以上の石膏類が良い。粉末度の上限は特に制限されないが、粉末度を高めるコストが嵩む割にはその効果が鈍化することから概ね１５０００ｃｍ２／ｇ以下が適当である。 The gypsum used in the present invention is not particularly limited as long as it is a powder mainly composed of anhydrous gypsum, dihydrate gypsum or hemihydrate gypsum, but is preferably composed mainly of type II anhydrous gypsum from the viewpoint of enhancing the strength. . Gypsum reacts with aluminate phases in the cement and calcium aluminate, and the like to produce ettringite (3CaO · Al 2 O 3 · 3CaSO 4 · 32H 2 O), with fast curing is obtained by this, grout cured body Can be prevented from shrinking. The fineness of the gypsum used is preferably 3000 cm 2 / g or more in terms of the specific surface area according to the Blaine method because reaction activity can be obtained. More preferably, gypsum having a fineness of 6000 cm 2 / g or more is preferable. The upper limit of the fineness is not particularly limited, but about 15000 cm 2 / g or less is appropriate because the effect is slowed down for the cost of increasing the fineness.
本発明において石膏の含有量は、流動性及び可使時間を確保し易く且つ初期強度が高いことから、セメント１００質量部に対し５〜５０質量部が好ましく、１０〜３０質量部がより好ましい。 In the present invention, the gypsum content is preferably 5 to 50 parts by mass and more preferably 10 to 30 parts by mass with respect to 100 parts by mass of the cement because fluidity and pot life are easily secured and the initial strength is high.
ここで本発明における結合材は、セメント、カルシウムアルミネート類及び石膏を含有するが、これらに限定されるものではない。結合材としては水硬性もしくは潜在水硬性を有し、強度発現に寄与する無機材料であればよく、上記以外に、高炉スラグ微粉末、フライアッシュやシリカフューム等のポゾラン、生石灰、消石灰、膨張材等を使用することができる。但し、アルカリ金属炭酸塩など少量添加される無機塩は除くものとする。 Here, the binder in the present invention contains cement, calcium aluminate and gypsum, but is not limited thereto. The binding material may be any inorganic material that has hydraulic or latent hydraulic properties and contributes to the development of strength. Besides the above, blast furnace slag fine powder, pozzolanes such as fly ash and silica fume, quick lime, slaked lime, expansion material, etc. Can be used. However, inorganic salts added in small amounts such as alkali metal carbonates are excluded.
本発明で使用する凝結遅延剤は、速硬性グラウト材の適切な可使時間を得るために用いるものであり、セメント等の水硬性物質の凝結に遅延作用を及ぼすものであれば特に限定されるものではなく、例えば、クエン酸、グルコン酸、リンゴ酸および酒石酸等の有機酸またはその塩、ホウ酸ナトリウム等の無機酸塩、糖類等が挙げられ、これらのうちの一種又は二種以上が使用可能である。特にクエン酸、クエン酸塩、酒石酸及び酒石酸塩から選ばれる一種又は二種以上を用いると、速硬性グラウト材が流動性を有する時間が長く且つ初期の強度発現が高いことから好ましい。 The setting retarder used in the present invention is used for obtaining an appropriate pot life of the fast-setting grout material, and is particularly limited as long as it has a retarding action on the setting of a hydraulic substance such as cement. For example, organic acids such as citric acid, gluconic acid, malic acid and tartaric acid or salts thereof, inorganic acid salts such as sodium borate, saccharides, etc. are used, and one or more of these are used. Is possible. In particular, it is preferable to use one or two or more kinds selected from citric acid, citrate, tartaric acid and tartrate because the fast-curing grout material has a long fluidity and high initial strength.
本発明において凝結遅延剤の含有量は、結合材１００質量部に対して、０．３〜１．５質量部である。０．３質量部未満では、可使時間の保持が困難になる恐れがある。一方、１．５質量部を超えるとブリーディングは発生したり、可使時間の保持が困難になる恐れがある。０．４〜１．０質量部がより好ましい。 In the present invention, the content of the setting retarder is 0.3 to 1.5 parts by mass with respect to 100 parts by mass of the binder. If it is less than 0.3 parts by mass, it may be difficult to maintain the pot life. On the other hand, if the amount exceeds 1.5 parts by mass, bleeding may occur or it may be difficult to maintain the pot life. 0.4-1.0 mass part is more preferable.
本発明においては、ブリーディング発生の抑制及び可使時間確保の点から、増粘剤を含有する。本発明における増粘剤としては、水溶性のセルロース系、アクリル系、グアーガム系などが使用でき、これらの一種又は二種以上の使用が可能である。特に少量で材料分離抵抗性が高いことから水溶性セルロースが好ましい。水溶性セルロースとしては、セルロース系高分子化合物、例えば、カルボキシメチルセルロース、メチルセルロース、ヒドロキシプロピルメチルセルロース、ヒドロキシエチルセルロース、ヒドロキシプロピルセルロース等の水溶性セルロースエーテルが好ましいが、特に限定されない。 In the present invention, a thickener is contained from the viewpoint of suppressing the occurrence of bleeding and ensuring the pot life. As the thickener in the present invention, water-soluble cellulose-based, acrylic-based, guar gum-based and the like can be used, and one or more of these can be used. In particular, water-soluble cellulose is preferable because of its small amount and high material separation resistance. The water-soluble cellulose is preferably a cellulose polymer, for example, water-soluble cellulose ethers such as carboxymethyl cellulose, methyl cellulose, hydroxypropyl methyl cellulose, hydroxyethyl cellulose, and hydroxypropyl cellulose, but is not particularly limited.
本発明において増粘剤の含有量は、結合材１００質量部に対し、０．０１〜０．１質量部である。０．０１質量部未満では、ブリーディングは発生したり、可使時間の保持が困難になる恐れがある。一方、０．１質量部を超えると凝結時間が遅延し、強度発現性が低下する恐れがある。０．０２〜０．０８質量部がより好ましい。 In this invention, content of a thickener is 0.01-0.1 mass part with respect to 100 mass parts of binders. If it is less than 0.01 parts by mass, bleeding may occur or it may be difficult to maintain the pot life. On the other hand, if it exceeds 0.1 parts by mass, the setting time is delayed, and there is a risk that strength development will be reduced. 0.02-0.08 mass part is more preferable.
本発明においては、流動性を得易いことから、更に減水剤を含有する。本発明における減水剤とは、減水剤、高性能減水剤、ＡＥ減水剤、高性能ＡＥ減水剤及び流動化剤等のセメント分散剤のことであり、これらの一種又は二種以上を用いることができる。具体的には、ナフタレンスルホン酸系減水剤、リグニンスルホン酸塩系減水剤、ポリカルボン酸系減水剤、メラミンスルホン酸塩系減水剤が挙げられる。本発明において、減水剤の含有量は、流動性の確保及び材料分離又は強度低下防止の点から、結合材１００質量部に対し、０．２〜０．６質量部が好ましく、０．２５〜０．５質量部がより好ましい。 In the present invention, since a fluidity is easily obtained, a water reducing agent is further contained. The water reducing agent in the present invention refers to a cement dispersant such as a water reducing agent, a high performance water reducing agent, an AE water reducing agent, a high performance AE water reducing agent, and a fluidizing agent. One or more of these may be used. it can. Specific examples include naphthalene sulfonic acid water reducing agents, lignin sulfonate water reducing agents, polycarboxylic acid water reducing agents, and melamine sulfonate water reducing agents. In the present invention, the content of the water reducing agent is preferably 0.2 to 0.6 parts by mass with respect to 100 parts by mass of the binder, from the viewpoint of securing fluidity and preventing material separation or strength reduction, 0.5 parts by mass is more preferable.
本発明において、グラウト材の粘性を小さくし良好な流動性を得ること並びに発熱量を下げることで流動性の保持時間を確保できることから、骨材を含有する。本発明における骨材とは粗骨材及び細骨材のことであり、例えば、川砂、海砂、山砂、砕砂、人工細骨材、スラグ細骨材、再生細骨材、川砂利、海砂利、山砂利、砕石、人工粗骨材、スラグ粗骨材、再生粗骨材等が挙げられ、これらの一種又は二種以上の使用が可能であるが、充填性が高いことから骨材として細骨材を用いることが好ましい。 In the present invention, since the fluidity retention time can be secured by reducing the viscosity of the grout material to obtain good fluidity and reducing the calorific value, the aggregate is contained. Aggregates in the present invention are coarse aggregates and fine aggregates. For example, river sand, sea sand, mountain sand, crushed sand, artificial fine aggregate, slag fine aggregate, recycled fine aggregate, river gravel, sea Gravel, mountain gravel, crushed stone, artificial coarse aggregate, slag coarse aggregate, reclaimed coarse aggregate, etc. can be mentioned, but one or more of these can be used, but because it has high filling properties, It is preferable to use fine aggregate.
本発明において、骨材の含有量は、結合材１００質量部に対し、１０５〜１７５質量部である。１０５質量部未満では、可使時間の確保が困難になる恐れがある。一方、１７５質量部を超えるとブリーディングが発生したり、強度発現性が低下する恐れがある。１０５〜１５０質量部がより好ましく、１１０〜１２５質量部が更に好ましい。 In this invention, content of an aggregate is 105-175 mass parts with respect to 100 mass parts of binders. If the amount is less than 105 parts by mass, it may be difficult to ensure the pot life. On the other hand, if it exceeds 175 parts by mass, bleeding may occur or strength development may be reduced. 105-150 mass parts is more preferable, and 110-125 mass parts is still more preferable.
本発明においては、凝結時間を促進させるために、更に炭酸ナトリウム、炭酸カリウム及び炭酸リチウムから選ばれるアルカリ金属炭酸塩を一種又は二種以上を含有することが好ましい。アルカリ金属炭酸塩の含有量は、無収縮性および可使時間の確保の点から、結合材１００質量部に対し、０．４〜２．０質量部が好ましく、０．６〜１．０質量部がより好ましい。 In the present invention, in order to accelerate the setting time, it is preferable to further contain one or more alkali metal carbonates selected from sodium carbonate, potassium carbonate and lithium carbonate. The content of the alkali metal carbonate is preferably 0.4 to 2.0 parts by mass, and 0.6 to 1.0 parts by mass with respect to 100 parts by mass of the binder, from the viewpoint of ensuring no shrinkage and pot life. Part is more preferred.
本発明においては、充分な無収縮性を得る点から、発泡剤を一定量含有する。本発明における発泡剤としては、アルミニウムや亜鉛等の両性金属の粉末や過炭酸塩等が挙げられ、これらの一種又は二種以上の使用が可能である。本発明において、発泡剤の含有量は、結合材１００質量部に対し、充分な無収縮性を得ながら流動性を得やすいことから、０．０５〜０．４質量部が好ましく、０．１〜０．２質量部がより好ましい。 In the present invention, a certain amount of foaming agent is contained from the viewpoint of obtaining sufficient non-shrinkage. Examples of the foaming agent in the present invention include amphoteric metal powders such as aluminum and zinc, percarbonates, and the like, and one or more of these can be used. In the present invention, the content of the foaming agent is preferably 0.05 to 0.4 parts by mass with respect to 100 parts by mass of the binder because it is easy to obtain fluidity while obtaining sufficient non-shrinkage. -0.2 mass part is more preferable.
本発明の速硬性グラウト組成物には、セメント、カルシウムアルミネート類、石膏、凝結遅延剤、増粘剤、減水剤、アルカリ金属炭酸塩、発泡剤及び骨材以外に、上記以外の混和材料等の添加材（剤）の一種又は二種以上を本発明の効果を損なわない範囲で併用することができる。この添加材としては、例えばセメント用ポリマー、起泡剤、防水剤、防錆剤、収縮低減剤、保水剤、顔料、繊維、撥水剤等が挙げられる。 In addition to cement, calcium aluminate, gypsum, setting retarder, thickener, water reducing agent, alkali metal carbonate, foaming agent and aggregate, the quick-setting grout composition of the present invention includes admixtures other than the above. One or more additives (agents) can be used in combination as long as the effects of the present invention are not impaired. Examples of the additive include cement polymers, foaming agents, waterproofing agents, rust preventives, shrinkage reducing agents, water retention agents, pigments, fibers, and water repellents.
本発明の速硬性グラウト組成物は、水を添加して使用する。添加する水の量は、流動性及び速硬性の点から、結合材１００質量部に対し、３５〜４２質量部であるのが好ましく、３６〜４０質量部がより好ましい。尚、本発明において使用する水の量は、水溶液やエマルション等の液状の混和材料に含まれる水量も考慮したものとする。 The quick-setting grout composition of the present invention is used after adding water. The amount of water to be added is preferably 35 to 42 parts by mass, and more preferably 36 to 40 parts by mass with respect to 100 parts by mass of the binder from the viewpoint of fluidity and fast curing. The amount of water used in the present invention also takes into account the amount of water contained in a liquid admixture such as an aqueous solution or emulsion.
本発明の速硬性グラウト組成物は、水を加えて混練り後、土木構造物や建築構造物の構築、補修等において、空洞、空隙、隙間、くぼみ等に注入してグラウト材として使用される。特に、夏場等の２５℃以上となる高温環境下においても、充分な可使時間（４５分以上）を確保した上で、良好な初期強度発現性を有するグラウト材が得られることから、高温用速硬性グラウト組成物として好適に用いられる。 The fast-hardening grout composition of the present invention is used as a grout material by adding water and kneading and then injecting it into cavities, voids, gaps, depressions, etc. in the construction and repair of civil engineering structures and building structures. . In particular, even in a high temperature environment of 25 ° C. or more such as in summer, a grout material having good initial strength development can be obtained after securing a sufficient pot life (45 minutes or more). It is suitably used as a quick-setting grout composition.
次に実施例を挙げて本発明を更に詳細に説明するが、本発明はこれらに限定されるものではない。 EXAMPLES Next, although an Example is given and this invention is demonstrated further in detail, this invention is not limited to these.
＜実施例１＞
（使用材料）
使用材料を以下に示す。
・セメント：普通ポルトランドセメント（太平洋セメント社製）
・カルシウムアルミネート類：アルミナセメント（主成分：ＣａＯ・Ａｌ２Ｏ３）
・石膏：ＩＩ型無水石膏（ブレーン比表面積：７１００ｃｍ２／ｇ）
・凝結遅延剤：クエン酸ナトリウム（市販品）
・増粘剤：水溶性セルロースエーテル（市販品）
・アルカリ金属炭酸塩：炭酸ナトリウム（市販品）
・発泡剤：過炭酸ナトリウム（市販品）
・減水剤：ナフタレンスルホン酸系高性能減水剤
・細骨材：石灰石骨材
・水：水道水
<Example 1>
(Materials used)
The materials used are shown below.
・ Cement: Ordinary Portland cement (manufactured by Taiheiyo Cement)
Calcium aluminate: Alumina cement (main component: CaO / Al 2 O 3 )
Gypsum: type II anhydrous gypsum (Brain specific surface area: 7100 cm 2 / g)
-Setting retarder: Sodium citrate (commercially available)
・ Thickener: Water-soluble cellulose ether (commercially available)
・ Alkali metal carbonate: Sodium carbonate (commercially available)
・ Foaming agent: Sodium percarbonate (commercially available)
・ Water reducing agent: Naphthalenesulfonic acid-based high-performance water reducing agent ・ Fine aggregate: Limestone aggregate ・ Water: Tap water
（配合設計）
セメント、カルシウムアルミネート類及び石膏からなる結合材１００質量部に対して、増粘剤、凝結遅延剤、細骨材、減水剤を表１となるように配合設計した。また、当該結合材１００質量部に対して、発泡剤０．１５質量部、アルカリ金属炭酸塩０．８５質量部を添加した。
(Formulation design)
Thickeners, setting retarders, fine aggregates, and water reducing agents were blended and designed as shown in Table 1 with respect to 100 parts by mass of a binder composed of cement, calcium aluminates and gypsum. Moreover, 0.15 mass part of foaming agents and 0.85 mass part of alkali metal carbonate were added with respect to 100 mass parts of the said binder.
（速硬性グラウト材の作製）
上記配合割合の速硬性グラウト組成物と所定の水道水をモルタルミキサで混練し、速硬性グラウト材を作製した。まず、金属製円筒容器（直径：２４ｃｍ、深さ：２５ｃｍ）に、結合材１００質量部に対して、３７．５質量部の水道水４．４ｋｇを入れ、モルタルミキサの攪拌羽根が水に接する状態で該羽根を回転させながら、速硬性グラウト組成物２５ｋｇを投入し、その後９０秒間混練した。混練前の各材料の温度は３０℃に調整し、混練、及び品質評価試験は、３０℃の恒温室内で行った。作製したグラウト材の品質試験として、以下に示す試験を行った。結果を表３に示す。
(Preparation of fast-hardening grout material)
The quick-hardening grout composition and the predetermined tap water of the said mixture ratio were knead | mixed with the mortar mixer, and the quick-hardening grout material was produced. First, 4.4 kg of 37.5 parts by mass of tap water is put into a metal cylindrical container (diameter: 24 cm, depth: 25 cm) with respect to 100 parts by mass of the binder, and the stirring blades of the mortar mixer come into contact with the water. While rotating the blade in this state, 25 kg of the fast-hardening grout composition was added, and then kneaded for 90 seconds. The temperature of each material before kneading was adjusted to 30 ° C., and kneading and quality evaluation tests were performed in a constant temperature room at 30 ° C. As a quality test of the produced grout material, the following tests were performed. The results are shown in Table 3.
（品質評価試験）
（１）流動性試験
ＪＩＳ Ｒ ５２０１「セメントの物理試験方法」１１．フリー試験で１５回落下運動を行わない静置フローを測定した。フロー値が２００ｍｍ以上であれば流動性が良好であるとみなした。
（２）ブリーディング率
ＪＩＳ Ａ １１２３「コンクリートのブリーディング試験方法」に準じて、ブリーディング率を測定した。ブリーディングがないものを良好とみなした。
（３）可使時間
ＪＩＳ Ａ １１４７「コンクリートの凝結試験方法」に準じて、作製した速硬性グラウト材の始発時間を測定した。作製した速硬性グラウト材は速硬性の為、始発時間の直前まで充填作業が可能であることから、始発時間を可使時間として評価し、始発時間で４５分以上であるものを良好、この範囲から外れるものを不良と評価した。
（４）圧縮強度
土木学会基準ＪＳＣＥ−Ｇ ５０５−２０１０「円柱供試体を用いたモルタルまたはセメントペーストの圧縮強度試験方法（案）」に準じて、材齢４時間における圧縮強度を測定した。供試体の寸法は、直径５０ｍｍ、高さ１００ｍｍとした。また、養生は恒温槽内で、材齢直前まで型枠のまま湿潤養生とした。１０Ｎ／ｍｍ２以上を良好とみなした。
(Quality evaluation test)
(1) Fluidity test JIS R 5201 “Cement physical test method” In the free test, the static flow where no falling motion was performed 15 times was measured. If the flow value was 200 mm or more, the fluidity was considered good.
(2) Bleeding rate The bleeding rate was measured according to JIS A 1123 “Concrete bleeding test method”. Those without bleeding were considered good.
(3) Pot life time According to JIS A 1147 “Concrete setting test method”, the initial time of the produced quick-hardening grout material was measured. Because the fast-curing grout material produced is fast-curing and can be filled up to just before the starting time, the starting time is evaluated as the pot life, and the starting time is 45 minutes or more. Those that deviated from the evaluation were evaluated as defective.
(4) Compressive strength Compressive strength at a material age of 4 hours was measured according to JSCE-G 505-2010 “Method for testing compressive strength of mortar or cement paste using cylindrical specimen (draft)”. The dimensions of the specimen were 50 mm in diameter and 100 mm in height. In addition, the curing was performed in a thermostatic chamber with a wet form as it was until the age of material. 10 N / mm 2 or more was considered good.
（試験結果）
試験結果を表２に示す。本発明の実施例に当たる速硬性グラウト材は、何れもグラウト材としての充分な流動性、可使時間及び材齢４時間における圧縮強度を備えていた。（Ｎｏ．１〜３、６，７、１０、１１）
増粘剤が配合されていないＮｏ．４、凝結遅延剤、細骨材がそれぞれ所定範囲を超えて配合されているＮｏ．９、Ｎｏ．１３はブリーディングが発生する。増粘剤が所定範囲を超えて配合されているＮｏ．５は流動性が不良となる。凝結遅延剤、細骨材がそれぞれ所定範囲より少なく配合されているＮｏ．８、Ｎｏ．１２は可使時間の確保が困難となる。
(Test results)
The test results are shown in Table 2. The quick-hardening grout materials corresponding to the examples of the present invention all had sufficient fluidity as a grout material, pot life, and compressive strength at a material age of 4 hours. (No. 1-3, 6, 7, 10, 11)
No. with no thickener added. No. 4, a setting retarder and a fine aggregate are blended in excess of a predetermined range. 9, no. No. 13 causes bleeding. No. in which the thickener is blended beyond the predetermined range. No. 5 has poor fluidity. No. in which a setting retarder and fine aggregate are blended in less than a predetermined range. 8, no. No. 12 makes it difficult to secure the pot life.
＜実施例２＞
結合材１００質量部に対して、３０、３５、４２及び４７質量部となるよう調整した水道水と速硬性グラウト組成物を混練し、速硬性グラウト材を作製した。速硬性グラウト組成物の配合と水量を表３に示す。なお、速硬性グラウト組成物には、実施例１と同様に当該結合材１００質量部に対して、発泡剤０．１５質量部、アルカリ金属炭酸塩０．８５質量部を添加した。速硬性グラウトの作製方法、品質評価試験方法は、実施例１と同様に実施した。結果を表４に示す。
結合材１００質量部に対する水の量が少ない場合は、流動性が不良且つ可使時間の確保が困難になり（Ｎｏ．１４）、一方水の量が多い場合はブリーディングが発生し、圧縮強度が低下する（Ｎｏ．１７）。
<Example 2>
Tap water adjusted to be 30, 35, 42, and 47 parts by mass with respect to 100 parts by mass of the binder and a fast-curing grout composition were kneaded to prepare a fast-curing grout material. Table 3 shows the composition and water content of the quick-setting grout composition. In addition, 0.15 mass part of foaming agents and 0.85 mass part of alkali metal carbonate were added to the quick-hardening grout composition with respect to 100 mass parts of the said binder like Example 1. FIG. A method for producing a quick-hardening grout and a quality evaluation test method were carried out in the same manner as in Example 1. The results are shown in Table 4.
When the amount of water relative to 100 parts by mass of the binder is small, fluidity is poor and it is difficult to ensure the pot life (No. 14). On the other hand, when the amount of water is large, bleeding occurs and the compressive strength is low. (No. 17).
＜実施例３＞
環境温度を２０、２５、３５℃と変えた試験を実施した。速硬性グラウト組成物の配合は実施例１におけるＮｏ．１と同じ配合とし、環境温度を変えた以外は、実施例１と同様の方法で速硬性グラウト材を作製、評価した。結果を表５に示す。
２０℃環境下では、ブリーディングが発生するが（Ｎｏ．１８）、２５〜３５℃の環境下においては良好な流動性、可使時間及び材齢４時間における圧縮強度が得られる（Ｎｏ．１９、２０）。
<Example 3>
Tests were performed with the ambient temperature changed to 20, 25, and 35 ° C. The formulation of the quick-setting grout composition is No. 1 in Example 1. A fast-hardening grout material was prepared and evaluated in the same manner as in Example 1 except that the same composition as in Example 1 was used and the environmental temperature was changed. The results are shown in Table 5.
Bleeding occurs in an environment of 20 ° C. (No. 18), but good fluidity, pot life and compressive strength at a material age of 4 hours are obtained in an environment of 25 to 35 ° C. (No. 19, 20).
Claims (3)
The quick-setting grout composition according to claim 1 or 2, wherein the amount of water is 35 to 42 parts by mass with respect to 100 parts by mass of the binder containing the cement, calcium aluminate and gypsum. The fast-curing grout material used.
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| JP2020083698A (en) * | 2018-11-22 | 2020-06-04 | 阪神高速道路株式会社 | Rapid-hardening type light weight filling mortar composition for u-rib, and mortar thereof |
| JP2022164804A (en) * | 2018-12-10 | 2022-10-27 | デンカ株式会社 | Quick hardening material and cement composition |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01108139A (en) * | 1987-10-19 | 1989-04-25 | Daiichi Cement Kk | Expansive quick-setting grout |
| JPH1121160A (en) * | 1997-07-01 | 1999-01-26 | Ube Ind Ltd | Ultra high speed hardening nonshrinkable grout material |
| JP2001097759A (en) * | 1999-07-23 | 2001-04-10 | Taiheiyo Cement Corp | Quick hardening type grout composition |
| JP2001279243A (en) * | 2000-03-31 | 2001-10-10 | Grace Chemicals Kk | Method for fixing anchor |
| JP2001294469A (en) * | 2000-04-06 | 2001-10-23 | Denki Kagaku Kogyo Kk | Ultra rapid hardening, non-shrinkage grout |
| JP2003013062A (en) * | 2001-06-28 | 2003-01-15 | Asahi Denka Kogyo Kk | Slope surface anchor-setting material and method for producing the same |
| JP2007230833A (en) * | 2006-03-02 | 2007-09-13 | Mitsubishi Materials Corp | Ultrarapid hardening grout composition |
| WO2008059605A1 (en) * | 2006-11-17 | 2008-05-22 | Denki Kagaku Kogyo Kabushiki Kaisha | Cement mortar composition for grout and grout mortar obtained from the same |
| JP2009107894A (en) * | 2007-10-31 | 2009-05-21 | Taiheiyo Material Kk | Cement based anchoring material |
| JP2015120624A (en) * | 2013-12-25 | 2015-07-02 | 太平洋マテリアル株式会社 | Quick hardening grout composition |
-
2016
- 2016-03-17 JP JP2016053961A patent/JP6956468B2/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01108139A (en) * | 1987-10-19 | 1989-04-25 | Daiichi Cement Kk | Expansive quick-setting grout |
| JPH1121160A (en) * | 1997-07-01 | 1999-01-26 | Ube Ind Ltd | Ultra high speed hardening nonshrinkable grout material |
| JP2001097759A (en) * | 1999-07-23 | 2001-04-10 | Taiheiyo Cement Corp | Quick hardening type grout composition |
| JP2001279243A (en) * | 2000-03-31 | 2001-10-10 | Grace Chemicals Kk | Method for fixing anchor |
| JP2001294469A (en) * | 2000-04-06 | 2001-10-23 | Denki Kagaku Kogyo Kk | Ultra rapid hardening, non-shrinkage grout |
| JP2003013062A (en) * | 2001-06-28 | 2003-01-15 | Asahi Denka Kogyo Kk | Slope surface anchor-setting material and method for producing the same |
| JP2007230833A (en) * | 2006-03-02 | 2007-09-13 | Mitsubishi Materials Corp | Ultrarapid hardening grout composition |
| WO2008059605A1 (en) * | 2006-11-17 | 2008-05-22 | Denki Kagaku Kogyo Kabushiki Kaisha | Cement mortar composition for grout and grout mortar obtained from the same |
| JP2009107894A (en) * | 2007-10-31 | 2009-05-21 | Taiheiyo Material Kk | Cement based anchoring material |
| JP2015120624A (en) * | 2013-12-25 | 2015-07-02 | 太平洋マテリアル株式会社 | Quick hardening grout composition |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020083698A (en) * | 2018-11-22 | 2020-06-04 | 阪神高速道路株式会社 | Rapid-hardening type light weight filling mortar composition for u-rib, and mortar thereof |
| JP7125335B2 (en) | 2018-11-22 | 2022-08-24 | 阪神高速道路株式会社 | Fast-hardening lightweight filling mortar composition for U-ribs and its mortar |
| JP2022164804A (en) * | 2018-12-10 | 2022-10-27 | デンカ株式会社 | Quick hardening material and cement composition |
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| JP6956468B2 (en) | 2021-11-02 |
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