JP6322452B2 - Backfill material - Google Patents
Backfill material Download PDFInfo
- Publication number
- JP6322452B2 JP6322452B2 JP2014061672A JP2014061672A JP6322452B2 JP 6322452 B2 JP6322452 B2 JP 6322452B2 JP 2014061672 A JP2014061672 A JP 2014061672A JP 2014061672 A JP2014061672 A JP 2014061672A JP 6322452 B2 JP6322452 B2 JP 6322452B2
- Authority
- JP
- Japan
- Prior art keywords
- mass
- parts
- backfilling
- cement
- calcium aluminate
- 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.)
- Active
Links
- 239000000463 material Substances 0.000 title claims description 72
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 239000004568 cement Substances 0.000 claims description 23
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims description 21
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 12
- 229910052920 inorganic sulfate Inorganic materials 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 230000000887 hydrating effect Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 239000003607 modifier Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 4
- 229910000288 alkali metal carbonate Inorganic materials 0.000 claims description 3
- 150000008041 alkali metal carbonates Chemical group 0.000 claims description 3
- 238000005345 coagulation Methods 0.000 claims description 2
- 230000015271 coagulation Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 description 13
- 239000002689 soil Substances 0.000 description 11
- 239000004576 sand Substances 0.000 description 8
- 238000009933 burial Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 239000010802 sludge Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 5
- 239000003638 chemical reducing agent Substances 0.000 description 5
- 238000004017 vitrification Methods 0.000 description 5
- 239000011398 Portland cement Substances 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- 239000003153 chemical reaction reagent Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 239000010440 gypsum Substances 0.000 description 4
- 229910052602 gypsum Inorganic materials 0.000 description 4
- 238000006703 hydration reaction Methods 0.000 description 4
- 230000007774 longterm Effects 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000036571 hydration Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- 238000004904 shortening Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000004480 active ingredient Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000013065 commercial product Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005243 fluidization Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 2
- 229910052808 lithium carbonate Inorganic materials 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- -1 starch and dextrin Chemical compound 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- 229910004261 CaF 2 Inorganic materials 0.000 description 1
- 229920001353 Dextrin Polymers 0.000 description 1
- 239000004375 Dextrin Substances 0.000 description 1
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 229920000388 Polyphosphate Polymers 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 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 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000011400 blast furnace cement Substances 0.000 description 1
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 description 1
- 235000015165 citric acid Nutrition 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 235000019425 dextrin Nutrition 0.000 description 1
- 150000004683 dihydrates Chemical class 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011396 hydraulic cement Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000010813 internal standard method Methods 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- PSZYNBSKGUBXEH-UHFFFAOYSA-N naphthalene-1-sulfonic acid Chemical compound C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 239000003002 pH adjusting agent Substances 0.000 description 1
- 239000001205 polyphosphate Substances 0.000 description 1
- 235000011176 polyphosphates Nutrition 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- UIIIBRHUICCMAI-UHFFFAOYSA-N prop-2-ene-1-sulfonic acid Chemical compound OS(=O)(=O)CC=C UIIIBRHUICCMAI-UHFFFAOYSA-N 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 235000019830 sodium polyphosphate Nutrition 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 235000000346 sugar Nutrition 0.000 description 1
- 150000008163 sugars Chemical class 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Description
本発明は、セメント系埋戻し処理材に関する。 The present invention relates to a cement-based backfilling treatment material.
上・下水道管、ガス管、電信線管等の地下埋設物を改修等のために掘出したり、埋戻したりすることが頻繁に行われている。地下埋設物の埋設に際しては、例えば山砂等の良質土を用い、埋設した覆土表面にランマ等で転圧し、固め均す方法が行われてきた。この旧来方法に変わって、工期短縮の観点から、地下を掘出した際の掘出された土壌（以下、掘削土壌と称す。）等に水と固化材を加えて混合し、高流動化させたものを、再埋設のための埋戻し材に用いた急速流動化埋戻工法が利用され始めている。この工法は、工期短縮に加え、埋設後の残土発生量をかなり抑制できることが利点である。この工法に適用できる埋戻し材は、例えば埋設管の下側の地盤との隙間や隣接管同士の隙間にもスムーズに充填できるような高い流動状態のものであれば、埋戻し作業時間を短縮できるが、高流動性具備に伴い材料分離抵抗性や深さ方向に強度ムラが生じないような均質性も不可欠となる。さらには作業時間短縮に加え、早期硬化性を具備することで、全体の工期短縮が可能になる。 Frequently excavating and backfilling underground buried objects such as water and sewer pipes, gas pipes and telegraph lines for repairs. When burying underground objects, a method has been used in which high quality soil such as mountain sand is used, and the surface of the buried covering soil is compacted by a ramma or the like and consolidated. Instead of this conventional method, from the viewpoint of shortening the construction period, water and solidified material were added to the excavated soil (hereinafter referred to as excavated soil) when excavated underground and mixed to make it highly fluidized. The rapid fluidization backfilling method that uses the material as backfilling material for re-buried has begun to be used. This construction method has the advantage that it can significantly reduce the amount of residual soil generated after burial, in addition to shortening the construction period. If the backfill material that can be applied to this construction method is in a high fluidity state that can smoothly fill the gap between the ground below the buried pipe and the gap between adjacent pipes, for example, the backfilling operation time will be shortened. However, with high fluidity, material separation resistance and homogeneity that does not cause unevenness in the depth direction are indispensable. Furthermore, in addition to shortening the working time, the entire construction period can be shortened by providing early curability.
また、固化材にポルトランドセメント等の水硬性物質を使用したものや、速硬性固化材としてカルシウムアルミネートを主成分とするものが使用されてきたが、高含水率の埋戻し材に対してはポルトランドセメント、アルミナセメント及び石膏からなる固化材の使用により優れた流動性と速硬性及び適度な長期強度の改善がなされてきた（例えば、特許文献１参照）。しかし、短時間で埋設箇所の隅々まで充填できる埋戻し材を得ようとすると非常に多い量の水を配合しなければならず、アルミナセメント系の速硬成分では凝結が不足し、初期強度が低迷することがあった。一方、セメント系の地盤注入材においては、かなり高い含水率のものが一般的であり、そのような高含水率のセメント系のスラリーでも短時間の急硬性と強固な地盤を形成できるほどの強度発現性を具備することが知られている（例えば、特許文献２参照）。その他にも、コンクリート構造物における漏水箇所に充填施工する際に用いられる止水材は高い含水率の状態で用いられている。この止水材において求められる性能として瞬結性ならびに早強性であり、漏水を防止するだけの強度が必要である（例えば、特許文献３参照）。しかるに、地下埋設物用の埋戻し材に関しては、修理等のために再掘削の可能性が高いため、地盤注入材や止水材のごとく、再掘削が困難になるほどの恒久的に強固な埋設地盤を形成させることは適さない。 In addition, those using hydraulic materials such as Portland cement as the solidifying material and those containing calcium aluminate as the main component as the fast-curing solidifying material have been used. The use of a solidified material made of Portland cement, alumina cement, and gypsum has improved excellent fluidity, fast curing, and moderate long-term strength (see, for example, Patent Document 1). However, in order to obtain a backfilling material that can be filled to every corner of the burial site in a short time, a very large amount of water must be blended. There was a downturn. On the other hand, cement-based ground injection materials generally have a fairly high water content, and such high-water-content cement-based slurries are capable of forming short-term rapid hardness and strong ground. It is known to have expression properties (see, for example, Patent Document 2). In addition, the water-stopping material used when filling the water leakage location in the concrete structure is used with a high moisture content. The performance required for this water-stopping material is quick setting and early strength, and requires strength sufficient to prevent water leakage (see, for example, Patent Document 3). However, with regard to backfill materials for underground buried objects, there is a high possibility of re-digging for repairs, etc., so permanent burial that makes re-digging difficult, such as ground injection materials and water-stopping materials. It is not suitable to form the ground.
また、埋戻し材は地中等の空間を埋めるものであり、現場によって、非常に大きな容積の場合、埋戻し材の水量を増量させれば容積を大きくすることが出来、非常に簡易に製造できるという利点があるが、材料分離や硬化不良の恐れがあり、高含水率の埋戻し材の製造には問題があった。 Also, the backfill material fills the space in the ground, etc., and if the volume is very large depending on the site, the volume can be increased by increasing the amount of water in the backfill material and can be manufactured very easily. However, there is a risk of material separation and curing failure, and there is a problem in manufacturing a high moisture content backfill material.
前述のように埋戻し処理材には、短時間で埋設箇所の隅々まで充填でき、短時間で一定の強度が得られ、かつ再掘削が可能であるという特性が要求されており、本発明はかかる要求特性を有する埋戻し処理材を提供することにある。 As described above, the backfilling material is required to have the characteristics that it can be filled to every corner of the buried portion in a short time, a certain strength can be obtained in a short time, and re-digging is possible. An object of the present invention is to provide a backfilling material having such required characteristics.
そこで本発明者は、前記要求特性を満たす埋戻し処理材を開発すべく種々検討した結果、埋戻し処理材としてセメント、カルシウムアルミネート、無機硫酸塩および凝結調整剤を一定量使用し、かつ当該埋戻し処理材、被処理物などの非水和成分及び水の使用量を一定の範囲として施工することにより、良好な流動性及び良好な早期強度だけでなく、再掘削可能な長期強度が得られることを見出し、本発明を完成した。 Therefore, as a result of various studies to develop a backfilling material that satisfies the required characteristics, the present inventor used a certain amount of cement, calcium aluminate, inorganic sulfate, and a setting regulator as the backfilling material, and By applying the amount of non-hydrating components such as backfilling materials and materials to be treated and water within a certain range, not only good fluidity and good early strength, but also long-term strength that can be re-excavated can be obtained. The present invention has been completed.
すなわち、本発明は、次の〔１〕〜〔４〕を提供するものである。 That is, the present invention provides the following [1] to [4].
〔１〕セメント１００質量部、カルシウムアルミネート８〜３０質量部、無機硫酸塩８〜３０質量部および凝結調整剤１〜５質量部を含有する埋戻し処理材であって、該処理材の使用量Ｘ質量部、骨材成分及び被処理物を含む非水和成分の使用乾燥固形分量Ｙ質量部、及び非水和成分に対する含水比Ｚ質量％が次の関係式になるように使用することを特徴とする埋戻し処理材。 [1] A backfilling treatment material containing 100 parts by weight of cement, 8 to 30 parts by weight of calcium aluminate, 8 to 30 parts by weight of inorganic sulfate, and 1 to 5 parts by weight of a setting regulator, and the use of the treatment material Use the amount X part by mass, the aggregate component and the non-hydrated component including the material to be processed Y solid part Y part by weight, and the water content Z mass% with respect to the non-hydrated component so that the following relational expression is satisfied. Backfilling material characterized by
〔２〕カルシウムアルミネートのＣａＯとＡｌ2Ｏ3の含有モル比がＣａＯ／Ａｌ2Ｏ3＝１．４〜３．０である〔１〕記載の埋戻し処理材。
〔３〕凝結調整剤がアルカリ金属炭酸塩である〔１〕又は〔２〕記載の埋戻し処理材。
〔４〕埋戻し処理材が、さらに流動化剤をセメント１００質量部に対し０．５〜５質量部含有する〔１〕〜〔３〕のいずれかに記載の埋戻し処理材。
[2] molar ratio of CaO and Al 2 O 3 of calcium aluminate is CaO / Al 2 O 3 = 1.4~3.0 (1) backfill processing material according.
[3] The backfilling material according to [1] or [2], wherein the setting modifier is an alkali metal carbonate.
[4] The backfilling material according to any one of [1] to [3], wherein the backfilling material further contains 0.5 to 5 parts by mass of a fluidizing agent with respect to 100 parts by mass of cement.
本発明によれば、急速流動化埋戻し工法に適した埋戻し用処理材（埋戻し材用添加材）が容易に得られ、埋設や埋戻し工期の飛躍的な短縮を図ることが出来ることに加え、前記埋戻し処理材を添加した後、再掘削する場合には比較的容易に掘削可能な硬化状態になるため、再掘削作業時間も短縮でき、しかも埋設管などの地下埋設施設を再掘削時に傷つける恐れも低減できる。 According to the present invention, a processing material for backfilling (additive material for backfilling material) suitable for the rapid fluidization backfilling method can be easily obtained, and the burial and backfilling time can be dramatically shortened. In addition, when re-digging after adding the above-mentioned backfilling treatment material, it becomes a hardened state that can be excavated relatively easily. The risk of injury during excavation can also be reduced.
本発明の埋戻し処理材は、セメント１００質量部、カルシウムアルミネート８〜３０質量部、無機硫酸塩８〜３０質量部および凝結調整剤１〜５質量部を含有し、
該処理材の使用量Ｘ質量部、骨材成分及び被処理物を含む非水和成分の使用乾燥固形分量Ｙ質量部、及び非水和成分に対する含水比Ｚ質量％が次の関係式になるように使用することを特徴とする。
The backfilling treatment material of the present invention contains 100 parts by mass of cement, 8 to 30 parts by mass of calcium aluminate, 8 to 30 parts by mass of inorganic sulfate, and 1 to 5 parts by mass of a setting modifier.
The used amount X part by mass of the treated material, the used dry solid content Y part by mass of the non-hydrated component including the aggregate component and the object to be treated, and the water content ratio Z mass% with respect to the non-hydrated component are expressed by the following relational expression. It is characterized by using as follows.
本発明の埋戻し処理材に使用されるセメントは、水硬性のセメントであれば特に限定されない。具体的には、例えば、普通、早強、超早強、中庸熱、低熱等の各種ポルトランドセメント、高炉セメントやフライアッシュセメント等の混合セメントを挙げることが出来る。ただし、アルミナセメントを除く。また、使用するセメントの粒度は特に制限されない。好ましくは、適度な水和反応活性が比較的安価に得られる可能性があることから３０００〜８０００ｃｍ2／ｇとする。 The cement used for the backfilling treatment material of the present invention is not particularly limited as long as it is a hydraulic cement. Specific examples include various portland cements such as normal, early strength, super early strength, moderate heat, and low heat, and mixed cements such as blast furnace cement and fly ash cement. However, alumina cement is excluded. Moreover, the particle size of the cement used is not particularly limited. Preferably, it is set to 3000 to 8000 cm 2 / g since moderate hydration reaction activity may be obtained relatively inexpensively.
本発明の埋戻し処理材に使用するカルシウムアルミネートは、化学成分としてＣａＯとＡｌ2Ｏ3からなるガラス化が進んだ構造の水和活性物質である。また、ＣａＯとＡｌ2Ｏ3に加えて他の化学成分が加わった化合物、固溶体もしくはガラス質物質又はこれらの混合物等であっても、本発明の効果を実質喪失させない限り許容される。具体的には、例えば４ＣａＯ・３Ａｌ2Ｏ3・ＳＯ3、１１ＣａＯ・７Ａｌ2Ｏ3・ＣａＦ2等を挙げることが出来るが、これらに限定されるものではない。好ましくは、高含水率の条件下でも良好な速硬性を付与する上で、例えばアルミナセメント以上の速硬性を付与できるものが望ましく、このような好適例としては、ＣａＯとＡｌ2Ｏ3の含有モル比がＣａＯ／Ａｌ2Ｏ3＝１．４〜３．０であって、ガラス化率５０％以上のカルシウムアルミネートが挙げられる。より好ましくは、含有モル比ＣａＯ／Ａｌ2Ｏ3＝１．８〜２．４であって、ガラス化率８５％以上のカルシウムアルミネートが良い。 Calcium aluminate used in the backfilling material of the present invention is a hydration active substance having a structure of vitrification made of CaO and Al 2 O 3 as chemical components. Further, even a compound, a solid solution, a glassy substance, a mixture thereof, or the like in which other chemical components are added in addition to CaO and Al 2 O 3 are acceptable as long as the effect of the present invention is not substantially lost. Specifically, 4CaO · 3Al 2 O 3 · SO 3, 11CaO · 7Al but 2 O 3 · CaF 2, etc. can be mentioned, but not limited thereto. Preferably, in order to give good quick hardening even under conditions of high moisture content, it is desirable to be able to give fast hardening, for example, higher than that of alumina cement. As such a preferable example, the inclusion of CaO and Al 2 O 3 A calcium aluminate having a molar ratio of CaO / Al 2 O 3 = 1.4 to 3.0 and a vitrification rate of 50% or more can be mentioned. More preferably, a calcium aluminate containing a molar ratio CaO / Al 2 O 3 = 1.8 to 2.4 and having a vitrification rate of 85% or more is preferable.
また、使用するカルシウムアルミネートの粒度は特に限定されない。好ましくは、ブレーン比表面積が４５００〜６５００ｃｍ2／ｇのものを使用すると、所望の速硬性を付与しやすくなるので良い。カルシウムアルミネートの含有量は、セメント含有量１００質量部に対し、８〜３０質量部であり、好ましくは１０〜２８質量部、より好ましくは１０〜２５質量部である。カルシウムアルミネートが８質量部未満であると、初期強度発現性が低くなり過ぎ、速硬性が得られないことがあるので好ましくない。また、カルシウムアルミネートが３０質量部を超えると、流動性が確保し難くなるので好ましくない。 Moreover, the particle size of the calcium aluminate to be used is not particularly limited. Preferably, when a brane specific surface area of 4500 to 6500 cm 2 / g is used, it is easy to impart desired rapid hardness. The content of calcium aluminate is 8 to 30 parts by mass, preferably 10 to 28 parts by mass, and more preferably 10 to 25 parts by mass with respect to 100 parts by mass of the cement content. If the calcium aluminate is less than 8 parts by mass, the initial strength developability becomes too low, and the rapid hardening may not be obtained. Moreover, when calcium aluminate exceeds 30 mass parts, since it becomes difficult to ensure fluidity | liquidity, it is unpreferable.
また、本発明の埋戻し処理材に使用する無機硫酸塩としては、石膏類、芒硝等が挙げられる。石膏類は、無水石膏、半水石膏、二水石膏及び硫酸カルシウムからなる群からなるいずれか１種又は２種以上のものである。好ましくは、無水石膏を使用する。本発明で無機硫酸塩は、高含水率下での硬化不良と強度発現性の低下を抑制し、所望の高流動状態を安定して得る上で不可欠である。無機硫酸塩の含有量は、セメント含有量１００質量部に対して、８〜３０質量部であり、好ましくは８〜２５質量部、より好ましくは８〜２０質量部である。無機硫酸塩が８質量部未満であると、中〜長期強度の伸びが低下し過ぎるため、好ましくない。また、無機硫酸塩が３０質量部を超えると、硬化不良と強度発現性が低下する。 In addition, examples of the inorganic sulfate used in the backfilling treatment material of the present invention include gypsum and salt cake. The gypsum is one or more of the group consisting of anhydrous gypsum, hemihydrate gypsum, dihydrate gypsum, and calcium sulfate. Preferably, anhydrous gypsum is used. In the present invention, the inorganic sulfate is indispensable for suppressing a poor curing under a high water content and a decrease in strength, and stably obtaining a desired high flow state. Content of an inorganic sulfate is 8-30 mass parts with respect to 100 mass parts of cement contents, Preferably it is 8-25 mass parts, More preferably, it is 8-20 mass parts. If the inorganic sulfate is less than 8 parts by mass, the elongation of medium to long-term strength is excessively lowered, which is not preferable. On the other hand, if the inorganic sulfate exceeds 30 parts by mass, poor curing and strength development will be reduced.
本発明の埋戻し処理材に使用する凝結調整剤は、モルタルやコンクリートに使用できる凝結調整剤であれば凝結促進剤及び凝結遅延剤の何れでも使用できる。凝結促進剤は初期凝結を促進し、凝結始発時間を早くすることが出来、初期強度発現性向上に寄与する。好ましくは、凝結促進剤にアルカリ金属の炭酸塩を使用する。具体的には、炭酸リチウム、炭酸ナトリウム、炭酸カリウムであり、このうち２種以上の併用も可能である。凝結遅延剤としては、クエン酸や酒石酸等のオキシカルボン酸類、澱粉やデキストリン等の糖類、ポリリン酸ナトリウム等のポリリン酸塩が使用できる。凝結調整剤の使用量は、セメント含有量１００質量部に対し、１〜５質量部であり、好ましくは２〜４質量部である。１質量部未満では初期強度発現性が不足し、工期の遅延等に繋がることがあるので好ましくはない。また、５質量部を超えると、長期強度が高くなり過ぎて再掘削に支障をきたすので好ましくない。 As the setting modifier used in the backfilling treatment material of the present invention, any setting accelerator or setting retarder can be used as long as it can be used for mortar and concrete. The setting accelerator promotes initial setting and can shorten the initial setting time, thereby contributing to improvement in initial strength development. Preferably, an alkali metal carbonate is used as the setting accelerator. Specifically, they are lithium carbonate, sodium carbonate, and potassium carbonate, and two or more of them can be used in combination. As the setting retarder, oxycarboxylic acids such as citric acid and tartaric acid, sugars such as starch and dextrin, and polyphosphates such as sodium polyphosphate can be used. The usage-amount of a setting regulator is 1-5 mass parts with respect to 100 mass parts of cement contents, Preferably it is 2-4 mass parts. If it is less than 1 part by mass, the initial strength development is insufficient, which may lead to a delay in the construction period, etc., which is not preferable. On the other hand, when the amount exceeds 5 parts by mass, the long-term strength becomes too high, which hinders re-excavation, which is not preferable.
また、本発明の埋戻し処理材は、本発明の効果を喪失させない限り前記以外の成分の含有も許容される。このような成分として、例えば、何れもモルタルやコンクリートに含有することができる流動化剤（減水剤、高性能減水剤、高性能ＡＥ減水剤、ＡＥ減水剤、分散剤と称されるものも含む。）、膨張材、ポゾラン反応性物質の他、還元剤やｐＨ調整剤を挙げることが出来るが、これらに限定されない。好ましくは、流動化剤を含有させることができる。流動化剤の含有により、埋戻し材用添加材が高い流動性を確保することができ、細部への充填が容易となる。なお、流動化剤の種類や有効成分は何れも限定されず、例えば、アルカリアリルスルホン酸系、ナフタレンスルホン酸系、メラミンスルホン酸系又はポリカルボン酸系等を有効成分とするものが挙げられる。流動化剤は、セメント１００質量部に対し０．５〜５質量部使用するのが好ましい。 In addition, the backfilling material of the present invention can contain components other than those described above unless the effects of the present invention are lost. Examples of such components include fluidizers (water reducing agents, high-performance water reducing agents, high-performance AE water reducing agents, AE water reducing agents, and dispersants, all of which can be contained in mortar and concrete. ), Expansion agents, pozzolanic reactive substances, reducing agents and pH adjusting agents, but are not limited thereto. Preferably, a fluidizing agent can be contained. By containing a fluidizing agent, the additive for backfilling material can ensure high fluidity, and the filling of details becomes easy. The type and active ingredient of the fluidizing agent are not limited, and examples thereof include those having an active ingredient such as alkali allyl sulfonic acid, naphthalene sulfonic acid, melamine sulfonic acid or polycarboxylic acid. The fluidizing agent is preferably used in an amount of 0.5 to 5 parts by mass with respect to 100 parts by mass of cement.
前記の埋戻し処理材は、埋戻しが必要な現場で、骨材成分及び被処理物を含む非水和成分、及び水と練り混ぜて埋設処理される。当該混練物又は混合物を埋戻し処理材という。 The above-mentioned backfilling treatment material is buried by being mixed with non-hydrated components including an aggregate component and an object to be treated and water at a site where backfilling is necessary. The kneaded product or mixture is referred to as a backfilling treatment material.
骨材成分及び被処理物を含む非水和成分としては、土砂、建設スラッジ及び細骨材の群から選ばれる１種又は２種以上を含有する。土砂は特に限定されるものではない。具体的には、例えば、土地造成目的で使用されるような土砂、地面を構成する土壌等を挙げることができる。土砂の化学成分も何れも限定されず、土砂中に例えば有機物等の不純物を含有したものでも良い。好ましくは、土砂として、地下施設を埋設するために、その埋設箇所の掘削で掘り出された土壌を使用すると、埋設残土の処理にも繋がるので良い。また、建設スラッジは、建設関連の汚泥であり、例えば、建設や土木工事の現場や構造物の新設、改築、修理又は解体等に伴って発生する汚泥で、土壌成分が幾分含まれるものも対象となり、また建設機材の洗浄等によって生じる泥水等も該当する。かかる汚泥は通常は含水状態を呈するが、使用対象となる建設スラッジは含水状態のものでも、これを乾燥したものでも制限されない。 As a non-hydration component containing an aggregate component and a to-be-processed object, 1 type, or 2 or more types chosen from the group of earth and sand, construction sludge, and a fine aggregate are contained. The earth and sand are not particularly limited. Specifically, for example, earth and sand used for land development, soil constituting the ground, and the like can be mentioned. The chemical components of the earth and sand are not limited, and the earth and sand may contain impurities such as organic substances. Preferably, in order to bury underground facilities as earth and sand, if soil excavated by excavation of the burial site is used, it may lead to processing of burial residual soil. Construction sludge is construction-related sludge, for example, sludge generated at the site of construction or civil engineering or construction, reconstruction, repair, or demolition, which contains some soil components. This also applies to muddy water generated by cleaning construction equipment. Such sludge is usually in a water-containing state, but the construction sludge to be used is not limited to a water-containing state or a dried one.
埋戻し処理材、非水和成分及び水は、該処理材の使用量Ｘ質量部、骨材成分及び被処理物を含む非水和成分の使用乾燥固形分量Ｙ質量部、及び非水和成分に対する含水比Ｚ質量％が次の関係式になるように使用する。 The backfilling treatment material, the non-hydrating component and the water are used amount X part by mass of the treating material, the aggregate component and the dry solid content Y part of the non-hydrating component including the object to be treated, and the non-hydrating component. It is used so that the water content ratio Z mass% with respect to the following relational expression.
（Ｙ＋Ｚ）／１５０＞ＸまたはＹ＜１３００またはＺ＞２４００の場合、初期強度発現性が低くなり過ぎ、速硬性が得られないことがあるので好ましくない。また（Ｙ＋Ｚ）／５０＜ＸまたはＹ＞２０００またはＺ＜８００の場合、流動性が確保し難くなるので好ましくない。
さらに好ましくは、（Ｙ＋Ｚ）／１２０≦Ｘ≦（Ｙ＋Ｚ）／７０であり、１５００≦Ｙ≦１８００、１２００≦Ｚ≦１７００である。
In the case of (Y + Z) / 150> X or Y <1300 or Z> 2400, the initial strength developability becomes too low, and quick hardening may not be obtained. Further, in the case of (Y + Z) / 50 <X or Y> 2000 or Z <800, it is difficult to secure fluidity, which is not preferable.
More preferably, (Y + Z) / 120 ≦ X ≦ (Y + Z) / 70, 1500 ≦ Y ≦ 1800, 1200 ≦ Z ≦ 1700.
本発明の埋戻し処理材を使用した埋戻し材の製造方法の好適な一例を示すと、骨材成分及び被処理物を含む非水和成分について含水比を調整し、混合機に加えて１〜２分程度混合する。次いでセメントおよびカルシウムアルミネートを初めとする残りの添加物を一括投入して同様に混合することで得られる。流動化剤を使用する場合は、処理材添加の際に共に添加する。混合機は特に限定されない。 A preferred example of a method for producing a backfill material using the backfill material of the present invention is as follows. The water content ratio of the non-hydrated component including the aggregate component and the object to be treated is adjusted and added to the mixer. Mix for about 2 minutes. Subsequently, the remaining additives such as cement and calcium aluminate are added all at once and mixed in the same manner. When a fluidizing agent is used, it is added together with the treatment material. The mixer is not particularly limited.
得られた埋戻し材は、通常、埋設箇所に流し込むだけでよい。当該流し込みだけで良好に充填でき、また比較的平滑な表面が得られるので、均し施工等の埋設後の仕上げ作業も省略または軽微なもので良い。 The obtained backfilling material usually only needs to be poured into the burial site. Since the filling can be satisfactorily performed only by the pouring and a relatively smooth surface can be obtained, finishing work after embedding such as leveling can be omitted or light.
以下、本発明を実施例によって具体的に説明するが、本発明は記載した実施例に限定されるものではない。なお、本実施例は特記ない限り、２０℃（±１℃）の環境下で行った。測定対象物の温度も概ね同様の温度にして測定に供した。 EXAMPLES Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited to the described examples. In addition, this Example was performed in an environment of 20 ° C. (± 1 ° C.) unless otherwise specified. The temperature of the object to be measured was also set at a substantially similar temperature.
実施例１
［カルシウムアルミネートの作製］
何れも市販粉末試薬の、ＣａＯ及びＡｌ2Ｏ3を用い、ヘンシェル型混合機を使用し、ＣａＯ及びＡｌ2Ｏ3の含有モル比（ＣａＯ／Ａｌ2Ｏ3）の値が以下のＡ１〜Ａ３に表す値のカルシウムアルミネートが得られるように調合した。調合物は電気炉で約１６００℃（±５０℃）に加熱し、当該温度で６０分間保持した後、直ちに路外に取出した。取出した加熱物表面に冷却用の窒素ガスを流速約２０ｍｌ／秒で吹付けて急冷した。得られた急冷物は、全鋼製のボールミルで粉砕し、市販の分級装置にかけ、ブレーン比表面積約５０００ｃｍ2／ｇの粒度になるよう調整せしめたカルシウムアルミネートを作製した。また、このガラス化率を、粉末エックス線回折装置を用い、質量がＭ１のカルシウムアルミネートに含まれる各鉱物の質量を内部標準法等で定量し、定量出来た含有鉱物相の総和質量（Ｍ２）を算出し、残部が純ガラス相と見なし、次式でガラス化率を算出した。
Example 1
[Preparation of calcium aluminate]
All use commercially available powder reagents, CaO and Al 2 O 3 , use a Henschel type mixer, and the content molar ratio of CaO and Al 2 O 3 (CaO / Al 2 O 3 ) has the following values A1 to A3 Formulation was made so that a calcium aluminate having the value shown in FIG. The preparation was heated to about 1600 ° C. (± 50 ° C.) in an electric furnace, held at that temperature for 60 minutes, and immediately taken out of the road. Nitrogen for cooling was blown onto the surface of the heated product taken out at a flow rate of about 20 ml / second for rapid cooling. The obtained rapidly cooled product was pulverized with a ball mill made of all steel, and applied to a commercially available classifier to produce a calcium aluminate adjusted to a particle size of about 5000 cm 2 / g of Blaine specific surface area. Further, the vitrification rate is determined by using a powder X-ray diffractometer, and the mass of each mineral contained in the calcium aluminate having a mass of M1 is quantified by an internal standard method or the like. The remainder was regarded as a pure glass phase, and the vitrification rate was calculated by the following formula.
［埋戻し材の作製］
骨材成分が含有した非水和成分（土砂及び細骨材）８００〜２５００質量部に対して含水比５００〜３０００質量％相当に調整した材料に固化成分としてセメント、カルシウムアルミネート（Ａ１〜Ａ３）、無機硫酸塩（Ｂ１、Ｂ２）、凝結調整剤（Ｃ１、Ｃ２）をホバート型ミキサに投入し、約１分間混合し埋戻し材を作製した。表１に、添加剤成分の配合を示す。
[Production of backfill material]
Cement, calcium aluminate (A1 to A3) as a solidifying component in a material adjusted to a moisture content of 500 to 3000% by mass with respect to 800 to 2500 parts by mass of non-hydrated components (earth and sand and fine aggregates) contained in the aggregate component ), Inorganic sulfates (B1, B2) and setting regulators (C1, C2) were put into a Hobart mixer and mixed for about 1 minute to prepare a backfill material. Table 1 shows the composition of additive components.
なお、非水和成分については恒温乾燥による重量減少量によってその含水量を予め調べ、水を別添加し、含水率を調整した。 In addition, about the non-hydration component, the moisture content was investigated beforehand by the weight loss by constant temperature drying, water was added separately, and the moisture content was adjusted.
以下に使用材料の詳細を示す。
普通ポルトランドセメント（市販品、ブレーン比表面積；３３５０ｃｍ2／ｇ）
Ｂ１；II型無水石膏（市販品、ブレーン比表面積；６０００ｃｍ2／ｇ）
Ｂ２；無水芒硝（市販試薬）
Ｃ１；炭酸リチウム（市販試薬）
Ｃ２；炭酸ナトリウム（市販試薬）
Details of the materials used are shown below.
Ordinary Portland cement (commercial product, Blaine specific surface area; 3350 cm 2 / g)
B1; Type II anhydrous gypsum (commercial product, Blaine specific surface area: 6000 cm 2 / g)
B2: Anhydrous sodium sulfate (commercially available reagent)
C1: Lithium carbonate (commercially available reagent)
C2; sodium carbonate (commercially available reagent)
［埋戻し材の評価］
作製した埋戻し材に対し、作製直後の埋戻し材を内径５０ｍｍで高さ１００ｍｍの円筒状成形型に充填し、大気中で２４時間静置後に脱型して硬化質の供試体を作製した。脱型直後の供試体と、脱型後湿度６０％に保った恒湿器中で２８日間養生せしめた供試体のそれぞれにつき、ＪＩＳ Ａ １２１６に規定の「土の一軸圧縮試験方法」に準拠した方法で一軸圧縮強度を測定した。さらに、主にローム質土壌からなる地盤に縦横がそれぞれ１ｍで深さ５０ｃｍの穴を掘削し、穴底から約５ｃｍ上に直径１５ｃｍ長さ１ｍの塩化ビニル製の硬質管を水平に配せるよう、前記硬質管の両端付近に硬質管を穴底から支えるための幅５ｃｍの台座を１対設け、硬質管を台座に設置した。この穴に気温２０℃以下で前記作製した埋戻し材を上面まで流し込むことで埋設した。尚、表１に記載した配合例のＮｏ．１１、１２、１５、１８、２３及び２６以外の埋戻し材は、容易に流し込むことが可能な流動状態を呈するものであった。埋設面は特に転圧等の処理は行わずこのまま２４時間放置した。放置後に円筒形の５０ｋｇの重りを埋設面に置いたときに、埋設面に沈下や崩壊が目視で観察されなかったものを、埋設地盤形成が「良好」と判断し、それ以外の状況となったものは「不良」と判断した。また、埋設地盤形成が「良好」と判断されたものについては、重りを取り除いてさらに１ヶ月放置した後、この埋設箇所を人力によりスコップで掘り返した。埋設された埋設管を短時間で容易に掘出せたものを再掘削性が「良好」と判断し、それ以外の状況であったものは全て再掘削性が「不良」と判断した。以上の結果を表２に纏めて表す。
[Evaluation of backfill material]
The prepared backfill material was filled in a cylindrical mold having an inner diameter of 50 mm and a height of 100 mm, left to stand for 24 hours in the atmosphere, and then demolded to prepare a hardened specimen. . Each of the specimen immediately after demolding and the specimen cured for 28 days in a humidity chamber maintained at a humidity of 60% after demolding conformed to the “soil uniaxial compression test method” prescribed in JIS A1216. The uniaxial compressive strength was measured by the method. In addition, drilling holes of 1m in length and 50cm in depth on the ground mainly composed of loamy soil, so that a rigid pipe made of vinyl chloride with a diameter of 15cm and length of 1m can be horizontally placed about 5cm above the hole bottom. A pair of pedestals with a width of 5 cm for supporting the hard tube from the bottom of the hole was provided near both ends of the hard tube, and the hard tube was installed on the pedestal. It was embed | buried by pouring the said backfill material produced in this hole to the upper surface at the temperature of 20 degrees C or less. In addition, No. of the compounding example described in Table 1. The backfilling materials other than 11, 12, 15, 18, 23, and 26 exhibited a fluid state that could be easily poured. The buried surface was left for 24 hours without any treatment such as rolling. When a cylindrical 50 kg weight was placed on the buried surface after being left untreated, it was judged that the buried ground formation was “good” if no subsidence or collapse was observed on the buried surface. Were judged as “bad”. In addition, in the case where the formation of the buried ground was judged to be “good”, the weight was removed and the mixture was left for another month, and then the buried portion was dug up manually with a scoop. Re-excavability was judged to be “good” when the buried pipe was easily excavated in a short time, and re-excavability was judged to be “bad” for all other cases. The above results are summarized in Table 2.
表１及び表２より、セメント１００質量部、カルシウムアルミネート８〜３０質量部、無機硫酸塩８〜３０質量部および凝結調整剤１〜５質量部を含有する埋戻し処理材を、前記関係式になるように使用して埋戻し処理すれば、十分な流動性を有し、充填性が良好であり、１日後には十分な強度が得られ、かつ埋戻し後に再掘削が可能であることがわかる。 From Tables 1 and 2, the backfilling material containing 100 parts by mass of cement, 8 to 30 parts by mass of calcium aluminate, 8 to 30 parts by mass of inorganic sulfate and 1 to 5 parts by mass of the coagulation modifier is represented by the above relational expression. If it is used to be backfilled, it will have sufficient fluidity, good fillability, sufficient strength after one day, and re-digging after backfilling is possible. I understand.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014061672A JP6322452B2 (en) | 2014-03-25 | 2014-03-25 | Backfill material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014061672A JP6322452B2 (en) | 2014-03-25 | 2014-03-25 | Backfill material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2015183114A JP2015183114A (en) | 2015-10-22 |
| JP6322452B2 true JP6322452B2 (en) | 2018-05-09 |
Family
ID=54350032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2014061672A Active JP6322452B2 (en) | 2014-03-25 | 2014-03-25 | Backfill material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6322452B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7268382B2 (en) | 2019-02-09 | 2023-05-08 | 三菱マテリアル株式会社 | How to dispose of used lithium-ion batteries |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017160663A (en) * | 2016-03-09 | 2017-09-14 | デンカ株式会社 | Soil pavement material and soil pavement method with it |
| WO2017171006A1 (en) * | 2016-03-31 | 2017-10-05 | 三菱マテリアル株式会社 | Rapid-hardening admixture and production method for same |
| JP6206614B1 (en) * | 2016-03-31 | 2017-10-04 | 三菱マテリアル株式会社 | Fast-curing admixture and method for producing the same |
| JP2021161833A (en) * | 2020-04-03 | 2021-10-11 | 横浜ライト工業株式会社 | Buried pile backfill method |
| CN115959849B (en) * | 2022-06-14 | 2024-03-26 | 中建三局第二建设工程有限责任公司 | Additive applied to dregs, preparation method and use method thereof |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3496769B2 (en) * | 1994-04-22 | 2004-02-16 | 電気化学工業株式会社 | Solidification material for excavated soil |
| JP3552302B2 (en) * | 1994-10-07 | 2004-08-11 | 宇部興産株式会社 | Solidified material for fluidized backfill method |
| JP3438499B2 (en) * | 1996-12-20 | 2003-08-18 | 宇部興産株式会社 | Solidified material for fluidized backfill and fluidized treated soil using the same |
| JP4818503B2 (en) * | 2000-09-20 | 2011-11-16 | 電気化学工業株式会社 | Low hexavalent chromium injection material |
| JP2003171165A (en) * | 2001-12-05 | 2003-06-17 | Denki Kagaku Kogyo Kk | Impregnating agent |
| JP2004149685A (en) * | 2002-10-31 | 2004-05-27 | Taiheiyo Material Kk | Grout |
| JP2005162949A (en) * | 2003-12-04 | 2005-06-23 | Taiheiyo Material Kk | Grouting material |
| JP2007320834A (en) * | 2006-06-05 | 2007-12-13 | Denki Kagaku Kogyo Kk | Ultra rapid hardening cement composition, ultra rapid hardening cement concrete composition and ultra rapid hardening cement concrete |
| WO2013077378A1 (en) * | 2011-11-24 | 2013-05-30 | 電気化学工業株式会社 | Quick-hardening cement |
-
2014
- 2014-03-25 JP JP2014061672A patent/JP6322452B2/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7268382B2 (en) | 2019-02-09 | 2023-05-08 | 三菱マテリアル株式会社 | How to dispose of used lithium-ion batteries |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2015183114A (en) | 2015-10-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6276027B2 (en) | Fast-curing buried material | |
| JP6322452B2 (en) | Backfill material | |
| JP6230883B2 (en) | Delay hardening type fluidized soil and filling method of underground cavities | |
| JP3894780B2 (en) | Cement grout composition | |
| KR20180002288A (en) | Grout material composition and high fluidity-grout material using the same | |
| KR101835795B1 (en) | flowable fills using fly ash of cogeneration plant | |
| JP6498716B2 (en) | Ground improvement method | |
| JP6487133B1 (en) | Ground improvement method | |
| JP5227161B2 (en) | Cement admixture and cement composition | |
| JP3185460B2 (en) | Solidification material composition for rapid fluidization backfill method | |
| JP6639917B2 (en) | Concrete and method for producing concrete | |
| JP6578316B2 (en) | Ground improvement method | |
| JP2004345885A (en) | Hydraulic composition, backfill material for ground using the same, non-high strength hardened part structural material and backfill process for excavated ground | |
| JP2021127446A (en) | Ground improvement method | |
| JP2016075080A (en) | Cement slurry and soil improvement method | |
| JP5192186B2 (en) | Cement mixture containing concrete glass and method for producing the same | |
| KR101564382B1 (en) | Eco-friendly mortar composition for compaction grouting | |
| CN105016667A (en) | Concrete for float collars and float shoes | |
| Safi et al. | Recycling of foundry sand wastes in self-compacting mortars: Use as fine aggregates | |
| KR102619818B1 (en) | Self-compacting concrete composition comprising mono-fluid type admixture composition | |
| JP6755828B2 (en) | Ground improvement method | |
| JP7339126B2 (en) | Additive for hydraulic composition for spraying | |
| JP4490796B2 (en) | Low thermal resistance slurry material for underground power transmission | |
| RU2806607C1 (en) | Building material | |
| JP5863478B2 (en) | Reinforcing bar joint filler and reinforcing joint filling method using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20170207 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20180326 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20180403 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20180409 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 6322452 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |