JP4107825B2 - Slug injection slurry - Google Patents
Slug injection slurry Download PDFInfo
- Publication number
- JP4107825B2 JP4107825B2 JP2001317979A JP2001317979A JP4107825B2 JP 4107825 B2 JP4107825 B2 JP 4107825B2 JP 2001317979 A JP2001317979 A JP 2001317979A JP 2001317979 A JP2001317979 A JP 2001317979A JP 4107825 B2 JP4107825 B2 JP 4107825B2
- Authority
- JP
- Japan
- Prior art keywords
- slag
- parts
- sulfate
- injection material
- injection
- 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.)
- Expired - Lifetime
Links
- 239000002002 slurry Substances 0.000 title claims description 7
- 239000007924 injection Substances 0.000 title description 41
- 238000002347 injection Methods 0.000 title description 41
- 239000002893 slag Substances 0.000 claims description 56
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 21
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 150000003839 salts Chemical class 0.000 claims description 8
- 229920000058 polyacrylate Polymers 0.000 claims description 7
- 239000003513 alkali Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 description 47
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 16
- 239000002270 dispersing agent Substances 0.000 description 13
- -1 calcium aluminates Chemical class 0.000 description 10
- 235000002639 sodium chloride Nutrition 0.000 description 10
- 239000000126 substance Substances 0.000 description 9
- 239000004568 cement Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 239000002245 particle Substances 0.000 description 7
- 235000015165 citric acid Nutrition 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 5
- 238000010276 construction Methods 0.000 description 5
- 239000011975 tartaric acid Substances 0.000 description 5
- 235000002906 tartaric acid Nutrition 0.000 description 5
- RGHNJXZEOKUKBD-SQOUGZDYSA-N D-gluconic acid Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 description 4
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 4
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 3
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000013065 commercial product Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 150000007524 organic acids Chemical class 0.000 description 3
- 235000005985 organic acids Nutrition 0.000 description 3
- 229920005646 polycarboxylate Polymers 0.000 description 3
- 235000019353 potassium silicate Nutrition 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- RGHNJXZEOKUKBD-UHFFFAOYSA-N D-gluconic acid Natural products OCC(O)C(O)C(O)C(O)C(O)=O RGHNJXZEOKUKBD-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical class OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 235000011116 calcium hydroxide Nutrition 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 239000000174 gluconic acid Substances 0.000 description 2
- 235000012208 gluconic acid Nutrition 0.000 description 2
- 229910000358 iron sulfate Inorganic materials 0.000 description 2
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 2
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 2
- 235000019341 magnesium sulphate Nutrition 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- PSZYNBSKGUBXEH-UHFFFAOYSA-M naphthalene-1-sulfonate Chemical compound C1=CC=C2C(S(=O)(=O)[O-])=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-M 0.000 description 2
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 2
- 229910052939 potassium sulfate Inorganic materials 0.000 description 2
- 235000011151 potassium sulphates Nutrition 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 description 1
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 1
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 1
- 229920001479 Hydroxyethyl methyl cellulose Polymers 0.000 description 1
- 229920001732 Lignosulfonate Polymers 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical class [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910052936 alkali metal sulfate Inorganic materials 0.000 description 1
- 229910001583 allophane Inorganic materials 0.000 description 1
- BJEPYKJPYRNKOW-UHFFFAOYSA-N alpha-hydroxysuccinic acid Natural products OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 description 1
- 229940037003 alum Drugs 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Chemical class 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical class OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Chemical class 0.000 description 1
- 235000001465 calcium Nutrition 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 239000005018 casein Substances 0.000 description 1
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 description 1
- 235000021240 caseins Nutrition 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- INHCSSUBVCNVSK-UHFFFAOYSA-L lithium sulfate Inorganic materials [Li+].[Li+].[O-]S([O-])(=O)=O INHCSSUBVCNVSK-UHFFFAOYSA-L 0.000 description 1
- 235000011090 malic acid Nutrition 0.000 description 1
- 239000001630 malic acid Substances 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- GRLPQNLYRHEGIJ-UHFFFAOYSA-J potassium aluminium sulfate Chemical compound [Al+3].[K+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GRLPQNLYRHEGIJ-UHFFFAOYSA-J 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000000176 sodium gluconate Substances 0.000 description 1
- 235000012207 sodium gluconate Nutrition 0.000 description 1
- 229940005574 sodium gluconate Drugs 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- RBTVSNLYYIMMKS-UHFFFAOYSA-N tert-butyl 3-aminoazetidine-1-carboxylate;hydrochloride Chemical compound Cl.CC(C)(C)OC(=O)N1CC(N)C1 RBTVSNLYYIMMKS-UHFFFAOYSA-N 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は、土木、建築分野で使用するスラグ系注入材に関する。
なお、本発明で使用する「部」及び「％」は特に規定のない限り質量基準とする。
【０００２】
【従来の技術とその課題】
現在、注入材は、水ガラス系、特殊シリカ系、及び高分子系の薬液系注入材と、セメント系などの非薬液系注入材（懸濁型注入材）の二つに大きく分けることが可能である。そして、懸濁型注入材としては、セメント及び／又はカルシウムアルミネートに混和剤を添加したセメント系注入材（たとえば特開2001-233645号公報，特開平11-246252号公報）の他に、高炉スラグを用いたスラグ系注入材等がある。
【０００３】
上記注入材のうち、薬液系注入材は強度や耐久性に問題があり、水ガラス系注入材は強アルカリ性であるという課題があった。
【０００４】
セメントに混和剤を添加してなるセメント系注入材は、混練物がｐＨが１２以上の強アルカリ性になるという課題があった。また、セメント系注入材はコンクリートの亀裂に注入する場合、粒子径が大きいため100μｍ以下の微小な亀裂に注入することは困難であり、そして、地盤に注入する場合、粒子径100μｍ以下のシルト層への浸透注入は困難であるという課題もあった。
【０００５】
また、カルシウムアルミネート類を含む注入材（たとえば特開平09-208952号公報、特開2001-164248号公報、特開2001-164249号公報）、石灰及び／又は消石灰を含む注入材（特開平11-293245号公報)も提案されているが、いずれもセメント系注入材と同様に、微小な亀裂に注入することは困難であり、しかも強アルカリ性になるという課題があった。
【０００６】
また、従来のスラグ系注入材は粒子径は小さいが、硬化させるために水ガラス等のアルカリ性の薬液を混合するために取扱いには保護具が必要で作業性が悪く、また、アルカリ分による環境汚染が発生するという問題があった。
【０００７】
本発明者は、特定のスラグ系注入材を使用することにより、前記課題を解消することができ、100μｍ以下の微小な亀裂幅を有するコンクリート硬化物への注入や、粒子径100μｍ以下のシルト層への浸透注入が可能であり、また、弱アルカリ性で高い強度発現性が得られるという知見を得て、本発明を完成するに至った。
【０００８】
【課題を解決するための手段】
即ち、本発明は、スラグ１００部、硫酸カルシウム１〜５部、ポリアクリル酸塩０．１〜５部、及びクエン酸又はその塩０．２〜０．５部、水１００〜３００部を含有してなる、ｐＨ８〜９．５の低アルカリであるスラグ系注入材スラリーである。
【０００９】
【発明の実施の形態】
以下、本発明を詳細に説明する。
本発明のスラグ系注入材（以下、本スラグ系注入材という）は、スラグと硫酸塩を含有してなるものであり、さらに、注入性を向上させるために、分散剤や遅延剤を含有するものである。
【００１０】
本発明で使用するスラグとは、高炉から副生する高炉スラグ、転炉や電炉等の製鋼炉から副生する製鋼スラグ、汚泥等を焼成あるいは溶融して得られる特殊スラグ、及び高炉スラグを圧力水で急冷粉砕して得られる水砕スラグなどが挙げられるが、強度発現性の面から、高炉スラグが好ましく、非晶質の高炉スラグがより好ましい。
【００１１】
スラグの平均粒子径は、10μｍ以下が好ましく、5μｍ以下がより好ましく、１μｍ以下が最も好ましい。10μｍを超えると100μｍ以下の微小な亀裂幅を有するコンクリート硬化物への注入や、粒子径100μｍ以下のシルト層への浸透注入が困難となる。
【００１２】
本発明で使用する硫酸塩は、初期強度発現性を向上させるために併用するものであり、具体的には、硫酸カルシウム、硫酸マグネシウム、及び硫酸バリウム等のアルカリ土類金属硫酸塩、硫酸リチウム、硫酸ナトリウム、及び硫酸カリウムなどのアルカリ金属硫酸塩、並びに、硫酸アルミニウム、みょうばん（硫酸カリウムアルミニウム等）及び硫酸鉄等の金属塩が挙げられ、これらのうちの一種又は二種以上が使用可能である。これらの中では、本スラグ系注入材の初期強度発現性が高いことからアルカリ土類金属硫酸塩が好ましく、硫酸カルシウムが最も好ましい。
【００１３】
硫酸塩の使用量は、スラグ100部に対して、0.5〜7部が好ましく、1〜5部がより好ましい。0.5部未満では本スラグ系注入材の初期強度発現性が小さくなる場合があり、7部を超えるとスラグ系注入材が増粘し、注入性が悪くなる場合がある。
【００１４】
本発明では、注入性を向上するために、分散剤を併用することが好ましい。
分散剤としては、ポリアクリル酸塩、ポリカルボン酸塩、リグニンスルホン酸塩、オキシカルボン酸塩、ナフタレンスルホン酸塩、メラミンスルホン酸塩、及びポリアクリル酸塩等が好ましく、これらのうち、注入性や強度発現性の面から、ポリカルボン酸塩又はポリアクリル酸塩がより好ましく、ポリアクリル酸塩が最も好ましい。
【００１５】
分散剤の使用量は、スラグ100部に対して、固形分換算で0.01〜10部が好ましく、0.1〜５部がより好ましい。0.01部未満では注入性が低下する場合があり、10部を超えると強度発現性が悪くなる場合がある。
【００１６】
本スラグ系注入材には、硬化時間を調整するために、遅延剤を併用することが好ましい。遅延剤としては、クエン酸、リンゴ酸、酒石酸、及びグルコン酸等の有機酸類あるいは有機酸類のアルカリ金属塩又はアルカリ土類金属塩、並びにリン酸及びホウ酸とそのアルカリ金属塩、又はアルカリ土類金属塩が挙げられ、これらのうちの一種又は二種以上が使用可能である。これらの中では、遅延効果の大きさと強度発現性の面から有機酸、特にクエン酸、酒石酸、又はグルコン酸、並びにこれらカルボン酸の塩が好ましく、クエン酸や酒石酸又はその塩がより好ましく、クエン酸又はその塩が最も好ましい。
【００１７】
遅延剤の使用量はスラグ100部に対して、0.1〜１部が好ましく、0.2〜0.5部がより好ましい。0.1部未満では遅延効果が小さく、硬化時間が調整できない場合がある。また、１部を超えると遅延効果が大きくなりすぎて初期強度発現性が悪くなる場合がある。
【００１８】
本発明においてスラグ、硫酸塩、及び水を混合して製造する。さらに、必要に応じて分散剤及び／又は遅延剤を添加してもよい。また、本発明の目的の範囲であれば、公知の混和剤を添加してもよい。
【００１９】
水の使用量はスラグ100部に対して、30〜1,000部が好ましく、100〜300部がより好ましい。30部未満では注入性が低下する場合があり、1,000部を超えると強度発現性が悪くなる場合がある。
【００２０】
なお、分散剤及び遅延剤は、スラグや硫酸塩の懸濁液に混合することも可能である。また、本発明では、発明の目的の範囲内であれば、セメント、生石灰、消石灰、及びカルシウムアルミネート類を除く、公知公用の混和材及び添加剤を混合することも可能である。
【００２１】
本スラグ系注入材を使用する場合、製造工場内でスラグ系注入材を製造して施工場所まで貨車もしくはアジテーター等で運搬して注入する方法も考えられるが、スラグ系注入材の安定性の面から施工現場に混合機を設置し、上述の通り２ショットでスラグ系注入材スラリーとして注入することが好ましい。
【００２２】
本発明のスラグ系注入材を混合する方法としては、スラグ又はスラグと分散剤からなる懸濁液と、硫酸塩又は硫酸塩と遅延剤からなる水溶液あるいは懸濁液とを別々に調製し、施工時に合流させてスラグ系注入材スラリーとする、いわゆる２ショットで注入することが好ましい。
【００２３】
また、本スラグ系注入材を混合するのに適した混合装置として、強制練りミキサー、オムニミキサー等が挙げられるが、スラグ系注入材の粘度、製造量、及び施工現場の様態に合わせた装置であれば特に制約されない。
【００２４】
さらに、本スラグ系注入材には、ベントナイト、アロフェン、メチルセルロース、ヒドロキシエチルセルロース、ヒドロキシエチルメチルセルロース、及びポリビニルアルコールなどの材料分離抵抗材、ゼラチン、カゼイン、及び金属アルミニウムなどの気泡剤、並びに、パラフィンやシリコーンなどの消泡剤等を併用することも可能である。
【００２５】
本スラグ系注入材及びスラグ系注入材スラリーは、単管ロッド工法、単管ストレーナ工法、二重管単相工法、二重管複相工法、及び二重管ダブルパッカー工法等の現在使用されている注入工法に使用することが可能である。
【００２６】
また、本発明のスラグ系注入材スラリーはｐＨ８〜９．５程度の低アルカリなので、施工時には保護眼鏡及び手袋等の保護具の着用が必要であるが、安全性が高い。
【００２７】
【実施例】
以下、本発明の実験例を示し、本発明をさらに説明するが、本発明はこれらに限定されるものではない。
【００２８】
実験例１
スラグ100部、表１に示す硫酸塩、及び水200部を混合し、本スラグ系注入材を作製し、その粘度、注入性、ｐＨ、硬化時間、及び圧縮強度を測定した。結果を表１に併記する。
【００２９】
＜使用材料＞
スラグ ：高炉水砕スラグ、平均粒子径２μｍ粉砕品
硫酸塩ア：硫酸カルシウム無水和物（和光純薬、１級）
硫酸塩イ：硫酸カリウム（和光純薬、１級）
硫酸塩ウ：硫酸バリウム（和光純薬、１級）
硫酸塩エ：硫酸マグネシウム無水物（和光純薬、１級）
硫酸塩オ：硫酸鉄（和光純薬、１級）
【００３０】
＜試験方法＞
粘度 ：本スラグ系注入材をカップに入れ、Ｂ型粘度計により測定
注入性 ：７号ケイ砂を、JSCE F 522に準じたポリエチレン袋に、高さ30cmに入れ、その上から本スラグ系注入材を静かに入れたときの本スラグ系注入材の浸透長さ
ｐＨ ：本スラグ系注入材をカップに入れ、ｐＨ計により測定。
硬化時間 ：本スラグ系注入材をカップに入れ、傾倒しても流れなくなるまでの時間
圧縮強度 ：本スラグ系注入材を４×４×16cmの型枠に採取して成形体を作製し、JIS R 5201に準じて材齢１日と材齢28日に耐圧機で５点づつ測定し、平均値をとった。
【００３１】
【表１】
実験例２
スラグ100部、硫酸塩ア３部、表２に示す分散剤、及び水200部を混合したこと以外は実験例１と同様に行った。結果を表２に併記する。
【００３３】
＜使用材料＞
分散剤ａ ：ポリアクリル酸塩、市販品
分散剤ｂ ：ポリカルボン酸塩、市販品
分散剤ｃ ：ナフタレンスルホン酸塩、市販品
【００３４】
【表２】
実験例２
スラグ100部、硫酸塩ア３部、表３に示す分散剤と遅延剤、及び水200部を混合したこと以外は実験例１と同様に行った。結果を表３に併記する。
【００３６】
＜使用材料＞
遅延剤Ａ ：クエン酸、市販品
遅延剤Ｂ ：酒石酸、市販品
遅延剤Ｃ ：グルコン酸ナトリウム、市販品
【００３７】
【表３】
【発明の効果】
以上のように、スラグと硫酸塩を併用することにより、さらに、必要に応じて分散剤や遅延剤を併用することにより、注入性に優れ、かつ、弱アルカリ性でありながら強度発現性が優れ、作業性が良い等の効果を奏する。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a slag injection material used in the civil engineering and construction fields.
“Parts” and “%” used in the present invention are based on mass unless otherwise specified.
[0002]
[Prior art and its problems]
Currently, injection materials can be broadly divided into two types: water glass-based, special silica-based, and polymer-based chemical solution-based injection materials, and cement-based non-chemical solution-based injection materials (suspension-type injection materials). It is. The suspension-type injection material includes cement-based injection material in which an admixture is added to cement and / or calcium aluminate (for example, JP 2001-233645 A, JP 11-246252 A), blast furnace There is a slag injection material using slag.
[0003]
Among the above injection materials, the chemical injection material has a problem in strength and durability, and the water glass injection material has a problem of being strongly alkaline.
[0004]
The cement-based injection material obtained by adding an admixture to cement has a problem that the kneaded material becomes strongly alkaline with a pH of 12 or more. In addition, when cement-type injection material is injected into a crack in concrete, it is difficult to inject it into a micro crack of 100 μm or less because of its large particle diameter, and when it is injected into the ground, a silt layer with a particle diameter of 100 μm or less There was also a problem that osmotic injection into the tube was difficult.
[0005]
Further, an injection material containing calcium aluminates (for example, JP-A-09-208952, JP-A-2001-164248, JP-A-2001-164249), an injection material containing lime and / or slaked lime (JP-A-11). No. -293245) has also been proposed, but in the same way as in cement-based injecting materials, it is difficult to inject into minute cracks and there is a problem that it becomes strongly alkaline.
[0006]
In addition, the conventional slag-based injection material has a small particle diameter, but in order to mix it with alkaline chemicals such as water glass, a protective device is required for handling and the workability is poor, and the environment due to alkali content There was a problem of contamination.
[0007]
The present inventor can solve the above-mentioned problems by using a specific slag-based injection material, injection into a hardened concrete having a micro crack width of 100 μm or less, and a silt layer having a particle diameter of 100 μm or less. The present invention has been completed by obtaining the knowledge that it is possible to inject into the water and that it is weakly alkaline and high strength can be obtained.
[0008]
[Means for Solving the Problems]
That is, the present invention contains 100 parts of slag, 1-5 parts of calcium sulfate, 0.1-5 parts of polyacrylate , 0.2-0.5 parts of citric acid or a salt thereof, and 100-300 parts of water. It is a slag type injection material slurry which is a low alkali having a pH of 8 to 9.5 .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail.
The slag injection material of the present invention (hereinafter referred to as the present slag injection material) contains slag and sulfate, and further contains a dispersant and a retarder in order to improve the injection properties. Is.
[0010]
The slag used in the present invention is a blast furnace slag produced as a by-product from a blast furnace, a steel slag produced as a by-product from a steelmaking furnace such as a converter or an electric furnace, a special slag obtained by firing or melting sludge, and a pressure applied to a blast furnace slag. Although granulated slag obtained by quenching and pulverizing with water is exemplified, blast furnace slag is preferable and amorphous blast furnace slag is more preferable in terms of strength development.
[0011]
The average particle diameter of the slag is preferably 10 μm or less, more preferably 5 μm or less, and most preferably 1 μm or less. When it exceeds 10 μm, it is difficult to inject into a hardened concrete having a micro crack width of 100 μm or less, or to penetrate into a silt layer having a particle diameter of 100 μm or less.
[0012]
The sulfate used in the present invention is used in combination to improve the initial strength development, specifically, alkaline earth metal sulfates such as calcium sulfate, magnesium sulfate, and barium sulfate, lithium sulfate, Examples thereof include alkali metal sulfates such as sodium sulfate and potassium sulfate, and metal salts such as aluminum sulfate, alum (potassium aluminum sulfate, etc.) and iron sulfate, and one or more of these can be used. . Of these, alkaline earth metal sulfates are preferred and calcium sulfate is most preferred because the initial strength development of the present slag-based injection material is high.
[0013]
The amount of sulfate used is preferably 0.5 to 7 parts, more preferably 1 to 5 parts, per 100 parts of slag. If it is less than 0.5 part, the initial strength development property of the present slag-based injecting material may be reduced, and if it exceeds 7 parts, the slag-based injecting material may be thickened and the injectability may be deteriorated.
[0014]
In the present invention, it is preferable to use a dispersant in combination in order to improve injectability.
As the dispersant, polyacrylate, polycarboxylate, lignin sulfonate, oxycarboxylate, naphthalene sulfonate, melamine sulfonate, and polyacrylate are preferable. From the viewpoint of strength development, polycarboxylates or polyacrylates are more preferred, and polyacrylates are most preferred.
[0015]
The amount of the dispersant used is preferably 0.01 to 10 parts, more preferably 0.1 to 5 parts in terms of solid content with respect to 100 parts of slag. If it is less than 0.01 part, the injectability may be lowered, and if it exceeds 10 parts, the strength development may be deteriorated.
[0016]
In order to adjust the curing time, it is preferable to use a retarder in combination with the present slag injection material. Examples of retarders include organic acids such as citric acid, malic acid, tartaric acid, and gluconic acid, or alkali metal salts or alkaline earth metal salts of organic acids, and phosphoric acid and boric acid and alkali metal salts or alkaline earth salts thereof. A metal salt is mentioned, The 1 type (s) or 2 or more types of these can be used. Of these, organic acids, particularly citric acid, tartaric acid, or gluconic acid, and salts of these carboxylic acids are preferred, citric acid, tartaric acid, or salts thereof are more preferred, and citric acid, tartaric acid, or salts thereof are more preferred. Most preferred are acids or salts thereof.
[0017]
0.1-1 part is preferable with respect to 100 parts of slag, and 0.2-0.5 part is more preferable. If it is less than 0.1 part, the delay effect is small and the curing time may not be adjusted. On the other hand, if it exceeds 1 part, the delay effect becomes too great and the initial strength development may be deteriorated.
[0018]
In the present invention, it is produced by mixing slag, sulfate and water. Furthermore, you may add a dispersing agent and / or a retarder as needed. Further, a known admixture may be added within the scope of the object of the present invention.
[0019]
The amount of water used is preferably 30 to 1,000 parts, more preferably 100 to 300 parts, per 100 parts of slag. If it is less than 30 parts, the injectability may be lowered, and if it exceeds 1,000 parts, the strength development may be deteriorated.
[0020]
The dispersing agent and retarder can be mixed in a slag or sulfate suspension. Moreover, in this invention, if it is in the range of the objective of invention, it is also possible to mix a well-known publicly used admixture and additive except cement, quicklime, slaked lime, and calcium aluminates.
[0021]
When using this slag injection material, a method of manufacturing the slag injection material in the manufacturing plant and transporting it to the construction site with a freight car or an agitator is also possible. It is preferable to install a mixer at the construction site and inject it as a slag-based injection material slurry in two shots as described above.
[0022]
As a method of mixing the slag injection material of the present invention, a suspension comprising slag or slag and a dispersing agent, and an aqueous solution or suspension comprising sulfate or sulfate and a retarder are separately prepared and applied. It is preferable to inject so-called two shots, which are sometimes combined to form a slag-based injection material slurry.
[0023]
In addition, as a mixing device suitable for mixing the present slag-based injecting material, a forced kneading mixer, an omni mixer, etc. can be mentioned, but it is an apparatus that matches the viscosity of the slag-based injecting material, the production amount, and the state of the construction site. There is no particular restriction as long as there is.
[0024]
Further, the slag-based injection material includes material separation resistance materials such as bentonite, allophane, methylcellulose, hydroxyethylcellulose, hydroxyethylmethylcellulose, and polyvinyl alcohol, foaming agents such as gelatin, casein, and metal aluminum, and paraffin and silicone. It is also possible to use an antifoaming agent such as
[0025]
This slag injection material and slag injection material slurry are currently used for single pipe rod method, single pipe strainer method, double pipe single phase method, double pipe double phase method, double pipe double packer method, etc. It can be used for existing injection methods.
[0026]
Moreover, since the slag injection slurry of the present invention is a low alkali having a pH of about 8 to 9.5, it is necessary to wear protective equipment such as protective glasses and gloves at the time of construction, but the safety is high.
[0027]
【Example】
Hereinafter, although the experiment example of this invention is shown and this invention is demonstrated further, this invention is not limited to these.
[0028]
Experimental example 1
100 parts of slag, sulfate shown in Table 1 and 200 parts of water were mixed to produce the present slag injection material, and its viscosity, pouring property, pH, curing time, and compressive strength were measured. The results are also shown in Table 1.
[0029]
<Materials used>
Slag: granulated blast furnace slag, pulverized product with an average particle size of 2 μm sulfate a: calcium sulfate anhydrate (Wako Pure Chemicals, grade 1)
Sulfate A: Potassium sulfate (Wako Pure Chemicals, Grade 1)
Sulfate U: Barium sulfate (Wako Pure Chemicals, Grade 1)
Sulfate d: Magnesium sulfate anhydride (Wako Pure Chemicals, Grade 1)
Sulfate O: Iron sulfate (Wako Pure Chemicals, Grade 1)
[0030]
<Test method>
Viscosity: Put this slag injection material in a cup and measure with a B-type viscometer. Injectability: Put No. 7 silica sand in a polyethylene bag according to JSCE F 522 at a height of 30 cm, and then add this slag injection Penetration length of the present slag-based injecting material when the material is gently put in: The slag-based injecting material is placed in a cup and measured with a pH meter.
Curing time: The time until the slag injection material is put in a cup and no longer flows even if it is tilted. According to R 5201, 5 points were measured with a pressure-resistant machine on the 1st and 28th days of the age, and the average value was taken.
[0031]
[Table 1]
Experimental example 2
The test was conducted in the same manner as in Experimental Example 1 except that 100 parts of slag, 3 parts of sulfate a, the dispersant shown in Table 2 and 200 parts of water were mixed. The results are also shown in Table 2.
[0033]
<Materials used>
Dispersant a: polyacrylate, commercially available dispersant b: polycarboxylate, commercially available dispersant c: naphthalene sulfonate, commercially available product
[Table 2]
Experimental example 2
The test was conducted in the same manner as in Experimental Example 1 except that 100 parts of slag, 3 parts of sulfate a, a dispersant and a retarder shown in Table 3 and 200 parts of water were mixed. The results are also shown in Table 3.
[0036]
<Materials used>
Delay agent A: citric acid, commercial product delay agent B: tartaric acid, commercial product delay agent C: sodium gluconate, commercial product
[Table 3]
【The invention's effect】
As described above, by using slag and sulfate in combination, by further using a dispersant and a retarder as necessary, the injection property is excellent, and the strength expression is excellent while being weakly alkaline. There are effects such as good workability.
Claims (1)
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| JP2001317979A JP4107825B2 (en) | 2001-10-16 | 2001-10-16 | Slug injection slurry |
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| JP2001317979A JP4107825B2 (en) | 2001-10-16 | 2001-10-16 | Slug injection slurry |
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| JP4355513B2 (en) | 2002-12-03 | 2009-11-04 | 三機工業株式会社 | Sorting conveyor with cross sorter |
| JP4636971B2 (en) * | 2005-08-09 | 2011-02-23 | 住友大阪セメント株式会社 | Grout method |
| JP4889261B2 (en) * | 2005-08-09 | 2012-03-07 | 住友大阪セメント株式会社 | Delayed plastic grout material |
| JP4636970B2 (en) * | 2005-08-09 | 2011-02-23 | 住友大阪セメント株式会社 | Grout method |
| JP2007106961A (en) * | 2005-10-17 | 2007-04-26 | Mitsubishi Materials Corp | Grouting material |
| JP4848293B2 (en) * | 2006-02-07 | 2011-12-28 | 日鐵セメント株式会社 | Ultra-fine particle injection material composition |
| JP4960124B2 (en) * | 2007-03-19 | 2012-06-27 | 株式会社総合開発 | Grounding pressure adjustment mat for pressure plate and installation method |
| MY156414A (en) * | 2007-09-14 | 2016-02-26 | Sanyo Chemical Ind Ltd | Cleaning agent for electronic material |
| JP5689224B2 (en) * | 2009-03-18 | 2015-03-25 | 電気化学工業株式会社 | Injection material and injection method |
| JP5267545B2 (en) * | 2010-12-21 | 2013-08-21 | 住友大阪セメント株式会社 | Grout method |
| AT511958B1 (en) * | 2011-09-29 | 2013-04-15 | Holcim Technology Ltd | METHOD FOR PRODUCING A BUILDING MATERIAL |
| JP6665129B2 (en) * | 2017-05-10 | 2020-03-13 | 三信建設工業株式会社 | Premix composition used for ground strengthening compaction material, ground strengthening compaction material, method for producing the same, and ground strengthening method using the same |
| JP7146202B1 (en) * | 2022-03-11 | 2022-10-04 | 強化土エンジニヤリング株式会社 | Ground grouting material and ground grouting method |
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