JP4288816B2 - Orbital grout material - Google Patents
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- JP4288816B2 JP4288816B2 JP2000025163A JP2000025163A JP4288816B2 JP 4288816 B2 JP4288816 B2 JP 4288816B2 JP 2000025163 A JP2000025163 A JP 2000025163A JP 2000025163 A JP2000025163 A JP 2000025163A JP 4288816 B2 JP4288816 B2 JP 4288816B2
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- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/29—Frost-thaw resistance
-
- 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
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
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- 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)
Description
【０００１】
【発明の属する技術分野】
本発明は、軌道用グラウト材に関するもので、更に詳しくは耐久性に優れ、耐凍害性に優れた軌道用グラウト材に関するものである。
【０００２】
【従来の技術】
従来、軌道用填充モルタルは、軌道スラブとコンクリート路盤の間隙に填充することにより列車走行時の荷重、衝撃又は振動等を吸収分散させるために設けられている。この填充モルタルは、セメント、アスファルト乳剤、砂を主として混合したセメントアスファルトモルタル（ＣＡモルタルと略称される）であり、年々改良され、今日に至っているが、未だいくつかの問題を抱えており、その一つは、耐久性の問題である。このＣＡモルタルは、流動性が高く、流し込み性には優れているが、硬化後の強度に弱い。またＣＡモルタルの強度に優れたものとして特公昭５１−４１１３０号公報があるが、このＣＡモルタルは、カルシウムサルホアルミネートを含有しており、これが強度発現および急硬性に寄与するので、スラブ軌道の交換作業が夜間の列車不通行時等に行われる鉄道用填充モルタルとして好ましいが、海底トンネル内での作業時における漏水による海水により膨潤破壊が起こるおそれがあり、またこれを凍結地帯で使用すると凍結による抵抗性に弱く、耐久性が低下するという問題があった。
【０００３】
また特開平３−５３５０号公報には、ＣＡモルタルの成分として、海水中の硫酸塩や塩化物と接触して体積膨張する反応生成物や可溶性水和物の生成の少ない鉱物成分のセメント、あるいは水酸化カルシウムと反応してこれを固定化するポゾラン材等を混入したセメントと石灰系の膨張材を用いるものが開示されているが、このＣＡモルタルは急硬性がない点でスラブ軌道の交換作業が夜間の列車不通行時等に行われる鉄道用填充モルタルとしては問題であった。
【０００４】
更に特開平５−９７４９０号公報には、ＣＡモルタルに油中水性カチオン性吸水性重合体エマルジョンを添加することにより砂等の骨材分離がなく、耐振性に優れ、かつ硬化体の容積収縮のないスラブ軌道てん充材が開示さているが、このＣＡモルタルは、急硬性や耐海水性には乏しいものであった。
【０００５】
【発明が解決しようとする課題】
しかしながら、軌道用填充モルタルとして使用する場合には、該填充モルタルは、路盤コンクリートとコンクリートスラブとの間の狭い空間に充填されるため、流動性が要求されるばかりでなく、スラブ軌道の交換作業が列車の通らない深夜（夜中の間合い）に行われるため、速硬性が要求されている。しかも、填充モルタルは現場で各種のモルタル材料を混合する点で、工程が繁雑となり、混合ミスや混合が不完全となりやすく、その結果硬化後の材料中に空隙できやすいばかりか、できた空隙に水が侵入し耐久性や耐凍害性が悪くなるという問題がある。また列車通過時の振動を吸収するために、低弾性であることが要求される。
【０００６】
そこで、本発明者等は、上記の問題点について種々検討したところ、以下の▲１▼〜▲６▼の成分からなることにより耐久性や耐凍害性に優れた、特に鉄道用に優れた粉末状速硬性混合物が得られることを見出した。▲１▼予め十分混合しておく（プレミックス化）ことにより均一な材料が得られ、耐久性や耐凍害性が得られる。▲２▼粉末型ポリマーを使用することによりプレミックス化が可能であり、予め工場設備で混合が可能である。ポリマーがマトリックスの空隙部に充填され空隙を塞ぎ、耐久性や耐凍害性が向上する。またポリマーがあることにより混合時に空気連行性が良好となり、耐凍害に有効な気泡が多く生成される。▲３▼速硬系のセメント系材料を使用することにより短時間で施工が可能であるため、鉄道用に適している。▲４▼砂を混合することにより粉体の混合を完全なものとすることができる。▲５▼粘土鉱物を混合することにより低弾性の材料が得られる。▲６▼更に珪酸質粉末を混合することにより弾性を下げることが可能となる。
【０００７】
本発明は、上記知見に基づきなされたもので、したがって、本発明が解決しようとする課題は、耐久性や耐凍害性に優れ、施工が夜間に短時間でしかも簡単に行える軌道用グラウト材を提供するものである。
【０００８】
【課題を解決するための手段】
本発明の上記課題は、セメント１００重量部、速硬性混和材３０〜１５０重量部、再乳化粉末樹脂１０〜３００重量部、砂５０〜１５０重量部、粘土鉱物５〜５０重量部、珪酸質粉末５０〜３００重量部及び炭酸カルシウム８０〜１００重量部の混合物からなることを特徴とする軌道用グラウト材によって達成される。
【０００９】
〔請求項１〕セメント、速硬性混和材、再乳化粉末樹脂、砂、粘土鉱物及び珪酸質粉末の混合物からなることを特徴とする軌道用グラウト材。
〔請求項２〕セメント１００重量部、速硬性混和材３０〜１５０重量部、再乳化粉末樹脂１０〜３００重量部、砂５０〜１５０重量部、粘土鉱物２〜１００重量部及び珪酸質粉末５０〜３００重量部からなることを特徴とする軌道用グラウト材。
〔請求項３〕粘土鉱物がベントナイトであることを特徴とする請求項１又は請求項２に記載の軌道用グラウト材。
【００１０】
本発明の軌道用グラウト材は、セメント１００重量部、速硬性混和材３０〜１５０重量部、再乳化粉末樹脂１０〜３００重量部、砂５０〜１５０重量部、粘土鉱物５〜５０重量部、珪酸質粉末５０〜３００重量部及び炭酸カルシウム８０〜１００重量部の混合物からなることを特徴とするもので、このような混合物を使用することにより夜間（鉄道の夜中の保守間合い）に簡単に施工かでき、グラウト材に適度の粘性を持たせ、フリージングを防止し、硬化後の材料を低弾性乃至所望の低弾性にするという顕著な効果を奏するものであり、しかも十分耐久性及び耐凍害性を有するという効果を奏するものである。
【００１１】
【発明の実施の形態】
以下に、本発明の発明の実施の形態を示すが、これに限定されるものではない。本発明の軌道用グラウト材は、セメント、速硬性混和材、再乳化粉末樹脂、砂、粘土鉱物及び珪酸質粉末の混合物からなることを特徴とするものであり、セメントとしては、（１）普通ポルトランドセメント、早強ポルトランドセメント、中庸熱ポルトランドセメント、耐硫酸塩ポルトランドセメント、ビーライトセメント、白色ポルトランドセメント等のポルトランドセメント、（２）高炉セメント、ヒライアッシュセメント、シリカセメント、シリカヒュームセメント等の混合セメント、（３）カルシウムアルミネート系特殊セメント、アルミナセメント、超速硬セメント等の特殊セメント、（４）土質安定用セメント等が挙げられる。上記（１）〜（４）のセメントを単独で使用しても、複数種類併用してもよい。好ましくは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である。
【００１２】
本発明に用いられる速硬性混和材には、各種のものが用いられるが、好ましくはポルトランドセメント又は混合セメント２０〜７０重量部にＩＩ型無水石こう１０〜３０重量部と製鋼滓２０〜５０重量部とこれら成分の総重量に対して凝結遅延剤０．５〜５重量部を添加して比表面積が３５００ｃｍ2 ／ｇになるまで粉砕した微粉混合物（特開昭６２−２６０７４９号公報に記載の急硬性セメント）であり、ここで用いられる凝結遅延剤としては、特に限定されないが、好ましくはリグニンスルホン酸、グルコン酸塩等が挙げられる。この他、ポルトランドセメント又は混合セメント１００重量部にステンレス製鋼製錬過程の脱酸工程でアルミニウム使用で副産されるステンレス製鋼滓１０〜７０重量部とＩＩ型無水石こう４〜４０重量部と乳酸、クエン酸、酒石酸のような有機系凝結遅延剤及び炭酸ナトリウムのような炭酸アルカリからなる凝結遅延剤０．５〜５重量部とを混合した後、この混合物を粉砕したもの（特開平６−３２１６０７号公報に記載の速硬性組成物）、又は市販のカルシウムアルミネート系等の速硬性材料（例えば、コスミック等）を用いることができる。
【００１３】
本発明に用いられる再乳化粉末樹脂としては、アクリル系樹脂、アクリル−ベオバ系樹脂、エチレン−酢酸ビニル共重合樹脂、スチレン−ブタジエン系樹脂等の再乳化粉末樹脂が用いられる。砂は、特に限定されるものではなく、この技術分野において通常使用されるものでよい。好ましくは珪砂がよい。粘土鉱物としては、ベントナイト、カルシウムベントナイト、モンモリロナイト、バイデライト、ノントロナイト、サポナイト、鉄サポナイト、ヘクトライト、ゼオライト、等が挙げられる。更に珪酸質粉末としては、普通珪石、市販の珪酸質粉末、例えば商品名「マイクロシリカ」等が使用される。これらの比表面積は５０００〜１００００ｃｍ2 ／ｇのものが好ましい。
【００１４】
本発明の粉末状速硬性混合物は、これらの成分の好ましい混合割合は、セメント１００重量部、速硬性混和材３０〜１５０重量部、再乳化粉末樹脂１０〜３００重量部、砂５０〜２５０重量部、粘土鉱物２〜１００重量部及び珪酸質粉末５０〜３００重量部であり、この混合範囲で十分好ましい耐久性及び耐凍害性が得られる。本発明において、速硬性混和材は、セメント１００重量部に対して、３０〜１５０重量部であり、この範囲で優れた速硬性が得られる。更に好ましくは６０〜１００重量部であり、この範囲でいっそう優れた速硬性が得られる。また本発明において、再乳化粉末樹脂は、セメント１００重量部に対して、１０〜３００重量部であり、この範囲で優れた耐久性並びに耐凍結性が得られる。更に好ましくは５０〜２００重量部であり、この範囲でいっそう優れた耐久性並びに耐凍結性が得られる。本発明において、砂は、セメント１００重量部に対して、５０〜２５０重量部が好ましく、更に好ましくは７０〜１００重量部である。粘土鉱物は、セメント１００重量部に対して、５〜５０重量部であり、この範囲で優れた弾性即ち所望の低弾性が得られる。更に好ましくは５〜３０重量部であり、この範囲でいっそう優れた所望の低弾性が得られるので、フリージングが防止される。本発明において、珪酸質粉末は、セメント１００重量部に対して、５０〜３００重量部が好ましく、更に好ましくは１００〜２００重量部であり、この範囲で優れた弾性即ち所望の低弾性が得られる。更に好ましくは１２０〜１６０重量部であり、この範囲でいっそう優れた所望の低弾性が得られ、その結果フリージングが防止される。
【００１５】
本発明の粉末状速硬性混合物は、予め、工場設備で上記の原料を均一に混合しておくことができる。施工に際し、現場で前記の粉末状速硬性混合物に水を加え、十分混合した後、スラブ軌道の空隙部に填充する。本発明では、施工に際し、粉末状速硬性混合物を運搬し、現場で水と混合するだけであるので、混合が簡単であり、かつ短時間で混合することができる。本発明の粉末状速硬性混合物には、更に添加材を添加することができ、必要に応じてクエン酸、酒石酸又はこれらの塩等の凝結調整剤、減水剤、ＡＥ剤、増粘剤、膨張剤等を添加することができる。
【００１６】
（作用）本発明では、再乳化粉末樹脂を添加することにより空隙への水の侵入を防ぎ、耐久性及び耐凍害性を向上させ、更に硬化後の材料を低弾性にすることができる。またベントナイト等の粘度鉱物を用いることにより粉体と水を混合したときのフリージングを防止し、硬化後の材料を所望の低弾性にすることができる。更に珪酸質粉末を加えることにより硬化後の材料を所望の低弾性にするという作用をする。
【００１７】
【実施例】
以下に本発明の実施例を示して更に詳しく説明するが、本発明は、これらの例によって限定されるものではない。
【００１８】
〔実施例１〕セメントとして、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の２種類を用いた。速硬性混和材としては、コーカエース（商品名、三菱マテリアル株式会社製、カルシウムアルミネートと硫酸カルシウムを主体とする微粉末）及びコスミック（商品名、デンカ社製、カルシウムアルミネート系速硬材）を用い、砂は、７号及び８号をそれぞれ用いた。また炭酸カルシウム、珪酸質粉末としては、マイクロシリカ７５（商品名、珪酸質粉末、秩父工業社製）又は普通珪石を用い、粘土鉱物は、ゼオライト、カルシウムベントナイト、ナトリウムベントナイトを用いた。更に凝結調整剤として、クエン酸、高性能減水剤として、マイテイ１００（商品名、花王社製）、再乳化粉末樹脂として、アクリル系樹脂、スチレン−ブタジエン系樹脂、膨張材として、小野田エクスパン及び水をそれぞれ表１に記載の配合割合で混合して本発明の軌道用グラウト材（実施例１〜５）を作製した。
【００１９】
また比較例１〜４は再乳化粉末樹脂を添加しない他は、実施例と同様にして作製した。実施例１〜５及び比較例１〜４で得られた軌道用グラウト材を表２に示されるファクターについて試験し、その結果を示した。
【００２０】
【表１】
【表２】
表２から明らかなように、比較例１乃至３では、再乳化粉末樹脂、珪酸質粉末及び粘土鉱物を含有していないために、圧縮強度が高過ぎるという欠点があるばかりでなく変形係数も極度に高い。また比較例４では、珪酸質粉末及び粘土鉱物を含有するために、圧縮強度は下がるが、変形係数が十分でない。これに対して、実施例１〜５は、本発明の構成からなるもので、適度の圧縮強度と変形係数が得られることがわかり、これにより耐久性に優れたものとなる。
【００２３】
ついで、凍結融解試験を行い、相対動弾性係数及び重量変化率を測定し、その結果を表３及び表４に示した。
【００２４】
【表３】
表３から明らかなように、比較例では、いずれも相対動弾性係数が下がるのに対して、本発明では、殆ど変化がない。これにより耐凍害性に優れていることがわかる。
【００２６】
【表４】
表４から明らかなように、比較例では、いずれも重量変化率が大きいのに対して、本発明では、変化が少ない。これにより耐凍害性に優れていることがわかる。
【００２８】
【発明の効果】
本発明の軌道用グラウト材は、セメント１００重量部、速硬性混和材３０〜１５０重量部、再乳化粉末樹脂１０〜３００重量部、砂５０〜１５０重量部、粘土鉱物５〜５０重量部、珪酸質粉末５０〜３００重量部及び炭酸カルシウム８０〜１００重量部の混合物からなることにより、夜間（鉄道の夜中の保守間合い）に簡単に施工でき、しかも再乳化粉末樹脂と粘度鉱物と珪酸質粉末とを共に含むことにより、硬化した材料は、所望の低弾性となるので、十分耐久性及び耐凍害性を有するという効果を奏するものである。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a grouting material for tracks, and more particularly to a grouting material for tracks having excellent durability and frost damage resistance.
[0002]
[Prior art]
Conventionally, track filling mortar is provided to absorb and disperse loads, impacts, vibrations, and the like during train running by filling a gap between a track slab and a concrete roadbed. This filling mortar is cement asphalt mortar (abbreviated as CA mortar) mainly composed of cement, asphalt emulsion, and sand. One is a problem of durability. This CA mortar has high fluidity and excellent pouring properties, but is weak in strength after curing. Japanese Patent Publication No. 51-41130 discloses excellent CA mortar strength. This CA mortar contains calcium sulfoaluminate, which contributes to strength development and rapid hardening. Although it is preferable as a railway filling mortar when the replacement work is performed at night when the train is closed, there is a risk of swelling destruction due to seawater due to water leakage during work in the submarine tunnel, and it is frozen when used in a freezing zone. There was a problem that durability was lowered due to weak resistance.
[0003]
JP-A-3-5350 discloses as a component of CA mortar a cement which is a mineral component which produces a volume of reaction product or soluble hydrate which expands by contact with sulfate or chloride in seawater, or Although the use of cement and lime-based expansion material mixed with pozzolanic material that reacts with calcium hydroxide and immobilizes it is disclosed, this CA mortar does not have rapid hardening, so the slab track replacement work However, it was a problem as a filling mortar for railways that was carried out when the train was closed at night.
[0004]
Furthermore, in JP-A-5-97490, by adding a water-in-oil cationic water-absorbing polymer emulsion to CA mortar, there is no separation of aggregates such as sand, excellent vibration resistance, and volume shrinkage of the cured product. Although no slab track filler has been disclosed, this CA mortar was poor in rapid hardening and seawater resistance.
[0005]
[Problems to be solved by the invention]
However, when used as a track filling mortar, the filling mortar is filled in a narrow space between the roadbed concrete and the concrete slab, so that not only fluidity is required, but also the slab track replacement work. Is performed at midnight (intermediate time) when trains cannot pass, so fast hardening is required. In addition, filling mortar involves mixing various mortar materials on-site, making the process complicated, and mixing errors and incomplete mixing tend to be incomplete.As a result, voids can easily be formed in the cured material. There is a problem that water penetrates and durability and frost damage resistance deteriorate. Moreover, in order to absorb the vibration at the time of passing a train, it is required to have low elasticity.
[0006]
Accordingly, the present inventors have made various studies on the above-mentioned problems, and as a result, the powders are excellent in durability and frost resistance due to the following components (1) to (6), and particularly excellent for railways. It has been found that a fast-curing mixture is obtained. (1) A uniform material can be obtained by sufficiently mixing (premixing) in advance, and durability and frost damage resistance can be obtained. {Circle around (2)} Premixing is possible by using a powder type polymer, and mixing is possible in advance at factory equipment. The polymer is filled in the voids of the matrix to close the voids, and durability and frost damage resistance are improved. In addition, the presence of the polymer improves air entrainment during mixing and produces many bubbles effective for frost resistance. (3) Since it can be constructed in a short time by using a fast-curing cement material, it is suitable for railways. {Circle around (4)} By mixing sand, powder mixing can be completed. (5) A low elastic material can be obtained by mixing clay minerals. (6) Further, the elasticity can be lowered by mixing siliceous powder.
[0007]
The present invention has been made on the basis of the above knowledge, and therefore, the problem to be solved by the present invention is a track grout material that is excellent in durability and frost resistance and can be easily constructed in a short time at night. It is to provide.
[0008]
[Means for Solving the Problems]
The above-mentioned problems of the present invention are as follows: 100 parts by weight of cement, 30 to 150 parts by weight of quick-setting admixture, 10 to 300 parts by weight of re-emulsified powder resin, 50 to 150 parts by weight of sand, 5 to 50 parts by weight of clay mineral, siliceous powder This is achieved by an orbital grout material comprising a mixture of 50 to 300 parts by weight and calcium carbonate 80 to 100 parts by weight .
[0009]
[Claim 1] An orbital grout material comprising a mixture of cement, fast-setting admixture, re-emulsifying powder resin, sand, clay mineral and siliceous powder.
[Claim 2] 100 parts by weight of cement, 30 to 150 parts by weight of quick-setting admixture, 10 to 300 parts by weight of re-emulsified powder resin, 50 to 150 parts by weight of sand, 2 to 100 parts by weight of clay mineral, and 50 to 50 parts of siliceous powder An orbit grout material comprising 300 parts by weight.
[Claim 3] The orbital grout material according to claim 1 or 2, wherein the clay mineral is bentonite.
[0010]
The orbital grout material of the present invention comprises 100 parts by weight of cement, 30 to 150 parts by weight of quick-setting admixture, 10 to 300 parts by weight of re-emulsified powder resin, 50 to 150 parts by weight of sand, 5 to 50 parts by weight of clay mineral, silicic acid It is characterized by comprising a mixture of 50 to 300 parts by weight of powder and 80 to 100 parts by weight of calcium carbonate . By using such a mixture, it can be easily constructed at night (maintenance during the night of the railway). It has a remarkable effect of imparting moderate viscosity to the grout material, preventing freezing, and making the cured material low elasticity or desired low elasticity, and has sufficient durability and frost resistance. It has the effect of having.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described, but the present invention is not limited thereto. The orbital grout material of the present invention is characterized by comprising a mixture of cement, fast-hardening admixture, re-emulsifying powder resin, sand, clay mineral and siliceous powder. As cement, (1) ordinary Portland cement, early-strength portland cement, moderately hot portland cement, sulfate-resistant portland cement, belite cement, white portland cement and other portland cement, (2) blast furnace cement, hiria ash cement, silica cement, silica fume cement, etc. Cement, (3) calcium aluminate special cement, alumina cement, special cement such as super fast cement, (4) soil stabilization cement, and the like. The above cements (1) to (4) may be used alone or in combination. Preferred is ordinary Portland cement or early-strength Portland cement.
[0012]
Various types of fast-curing admixtures used in the present invention are used, but preferably 10 to 30 parts by weight of type II anhydrous gypsum and 20 to 50 parts by weight of steelmaking iron are added to 20 to 70 parts by weight of Portland cement or mixed cement. And a fine powder mixture pulverized to a specific surface area of 3500 cm 2 / g by adding 0.5 to 5 parts by weight of a setting retarder to the total weight of these components (see JP-A-62-260749) The setting retarder used here is not particularly limited, but preferred examples include lignin sulfonic acid and gluconate. In addition, 100 parts by weight of Portland cement or mixed cement, 10 to 70 parts by weight of stainless steel slag that is by-produced by using aluminum in the deoxidation step of the stainless steel smelting process, 4 to 40 parts by weight of type II anhydrous gypsum and lactic acid, A mixture obtained by mixing an organic setting retarder such as citric acid and tartaric acid and 0.5 to 5 parts by weight of a set retarder composed of an alkali carbonate such as sodium carbonate, and then pulverizing the mixture (Japanese Patent Laid-Open No. 6-321607). Can be used, or commercially available calcium aluminate-based fast-curing materials (eg, cosmic).
[0013]
As the re-emulsifying powder resin used in the present invention, re-emulsifying powder resins such as acrylic resins, acrylic-veova resins, ethylene-vinyl acetate copolymer resins, styrene-butadiene resins are used. The sand is not particularly limited, and may be one usually used in this technical field. Preferably from silicosis sand. Examples of the clay mineral include bentonite, calcium bentonite, montmorillonite, beidellite, nontronite, saponite, iron saponite, hectorite, zeolite, and the like. Further, as siliceous powder, ordinary silica stone, commercially available siliceous powder, for example, trade name “Microsilica” or the like is used. These specific surface areas are preferably 5,000 to 10,000 cm 2 / g.
[0014]
In the powdery fast-curing mixture of the present invention, the preferred mixing ratio of these components is as follows: cement 100 parts by weight, fast-curing admixture 30-150 parts by weight, re-emulsified powder resin 10-300 parts by weight, sand 50-250 parts by weight 2 to 100 parts by weight of clay mineral and 50 to 300 parts by weight of siliceous powder. Sufficiently preferable durability and frost damage resistance are obtained in this mixing range. In the present invention, the quick-hardening admixture is 30 to 150 parts by weight with respect to 100 parts by weight of cement, and excellent quick-hardness is obtained within this range. More preferably, it is 60 to 100 parts by weight, and in this range, further excellent quick hardening is obtained. In the present invention, the re-emulsified powder resin is 10 to 300 parts by weight with respect to 100 parts by weight of cement, and excellent durability and freezing resistance can be obtained within this range. More preferably, it is 50 to 200 parts by weight, and further excellent durability and freezing resistance can be obtained in this range. In the present invention, the sand is preferably 50 to 250 parts by weight, more preferably 70 to 100 parts by weight with respect to 100 parts by weight of cement. Clay minerals is based on 100 parts by weight of cement, from 5 to 50 wt parts, has excellent elasticity i.e. desired low modulus in this range is obtained. More preferably, the amount is 5 to 30 parts by weight. In this range, a further excellent low elasticity can be obtained, so that freezing is prevented. In the present invention, the siliceous powder is preferably 50 to 300 parts by weight, more preferably 100 to 200 parts by weight with respect to 100 parts by weight of cement, and excellent elasticity, that is, desired low elasticity can be obtained in this range. . More preferably, the amount is 120 to 160 parts by weight, and in this range, a further excellent desired low elasticity is obtained, and as a result, freezing is prevented.
[0015]
In the powdery fast-curing mixture of the present invention, the above-mentioned raw materials can be uniformly mixed in advance with factory equipment. At the time of construction, water is added to the powdery fast-curing mixture at the site and mixed well, and then filled into the voids of the slab track. In the present invention, at the time of construction, the powdery fast-hardening mixture is only transported and mixed with water on site, so that the mixing is simple and can be performed in a short time. Additives can be further added to the powdery fast-curing mixture of the present invention, and if necessary, setting modifiers such as citric acid, tartaric acid or their salts, water reducing agents, AE agents, thickeners, swelling. An agent or the like can be added.
[0016]
(Operation) In the present invention, by adding the re-emulsified powder resin, water can be prevented from entering the voids, durability and frost resistance can be improved, and the cured material can be made low in elasticity. Further, by using a viscous mineral such as bentonite, freezing when the powder and water are mixed can be prevented, and the cured material can have a desired low elasticity. Further, by adding siliceous powder, the material after curing has a desired low elasticity.
[0017]
【Example】
Examples of the present invention will be described below in more detail, but the present invention is not limited to these examples.
[0018]
[Example 1] Two types of cement, ordinary Portland cement and early-strength Portland cement, were used. As quick-hardening admixtures, Coca ace (trade name, manufactured by Mitsubishi Materials Corporation, fine powder mainly composed of calcium aluminate and calcium sulfate) and Cosmic (trade name, manufactured by Denka Co., Ltd., calcium aluminate-based fast hardener) are used. The sand used was No. 7 and No. 8. Further, as calcium carbonate and siliceous powder, microsilica 75 (trade name, siliceous powder, manufactured by Chichibu Kogyo Co., Ltd.) or ordinary silica stone was used, and as the clay mineral, zeolite, calcium bentonite and sodium bentonite were used. Furthermore, citric acid as a coagulation regulator, Mighty 100 (trade name, manufactured by Kao Corporation) as a high-performance water reducing agent, acrylic resin, styrene-butadiene resin as re-emulsifying powder resin, Onoda Expan and water as expansion material Were mixed at the blending ratios shown in Table 1 to prepare the orbit grout materials (Examples 1 to 5) of the present invention.
[0019]
Further, Comparative Examples 1 to 4 were prepared in the same manner as in Examples except that the re-emulsified powder resin was not added. The track grout materials obtained in Examples 1 to 5 and Comparative Examples 1 to 4 were tested for the factors shown in Table 2, and the results were shown.
[0020]
[Table 1]
[Table 2]
As is apparent from Table 2, Comparative Examples 1 to 3 do not contain re-emulsified powder resin, siliceous powder and clay mineral, so that not only has a disadvantage that the compressive strength is too high, but also the deformation coefficient is extremely high. Very expensive. In Comparative Example 4, since the siliceous powder and the clay mineral are contained, the compressive strength is lowered, but the deformation coefficient is not sufficient. On the other hand, Examples 1-5 consist of the structure of this invention, and it turns out that moderate compressive strength and a deformation coefficient are obtained, and this becomes the thing excellent in durability.
[0023]
Subsequently, a freeze-thaw test was performed, and the relative kinematic elastic modulus and the weight change rate were measured. The results are shown in Tables 3 and 4.
[0024]
[Table 3]
As is clear from Table 3, in the comparative examples, the relative kinematic elastic modulus is decreased, whereas in the present invention, there is almost no change. This shows that it is excellent in frost damage resistance.
[0026]
[Table 4]
As is clear from Table 4, in the comparative examples, the weight change rate is large, whereas in the present invention, the change is small. This shows that it is excellent in frost damage resistance.
[0028]
【The invention's effect】
The orbital grout material of the present invention comprises 100 parts by weight of cement, 30 to 150 parts by weight of quick-setting admixture, 10 to 300 parts by weight of re-emulsified powder resin, 50 to 150 parts by weight of sand, 5 to 50 parts by weight of clay mineral, silicic acid by consisting quality powder 50-300 parts by weight and mixtures of 80 to 100 parts by weight of calcium carbonate, easily can in facilities Engineering at night (midnight maintenance Maai railway), moreover redispersible powder resin and clay minerals and siliceous By including the powder together, the cured material has a desired low elasticity, so that it has an effect of having sufficient durability and frost damage resistance.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000025163A JP4288816B2 (en) | 2000-02-02 | 2000-02-02 | Orbital grout material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000025163A JP4288816B2 (en) | 2000-02-02 | 2000-02-02 | Orbital grout material |
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| JP2001220189A JP2001220189A (en) | 2001-08-14 |
| JP4288816B2 true JP4288816B2 (en) | 2009-07-01 |
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| JP2000025163A Expired - Fee Related JP4288816B2 (en) | 2000-02-02 | 2000-02-02 | Orbital grout material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2004043207A (en) * | 2002-07-09 | 2004-02-12 | Mitsubishi Materials Corp | Premix powder for filler for slab track |
| JP2004131333A (en) * | 2002-10-10 | 2004-04-30 | Constec Engi Co | Anti-bacterial mortar and method of manufacturing the same |
| JP7082451B2 (en) * | 2018-03-19 | 2022-06-08 | 太平洋マテリアル株式会社 | Polymer cement mortar |
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