JP5840852B2 - Grout cement composition, grout mortar composition, grout cement paste, and grout mortar - Google Patents
Grout cement composition, grout mortar composition, grout cement paste, and grout mortar Download PDFInfo
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- 239000004568 cement Substances 0.000 title claims description 82
- 239000011440 grout Substances 0.000 title claims description 82
- 239000000203 mixture Substances 0.000 title claims description 46
- 239000004570 mortar (masonry) Substances 0.000 title claims description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 57
- 239000000843 powder Substances 0.000 claims description 39
- 239000003638 chemical reducing agent Substances 0.000 claims description 24
- 239000002518 antifoaming agent Substances 0.000 claims description 23
- 229910021487 silica fume Inorganic materials 0.000 claims description 18
- 239000011230 binding agent Substances 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 description 19
- 238000011161 development Methods 0.000 description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 8
- 229910001928 zirconium oxide Inorganic materials 0.000 description 8
- 239000002562 thickening agent Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 239000010881 fly ash Substances 0.000 description 4
- 238000004898 kneading Methods 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 235000019738 Limestone Nutrition 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 239000001913 cellulose Substances 0.000 description 3
- 229920002678 cellulose Polymers 0.000 description 3
- 239000013065 commercial product Substances 0.000 description 3
- 239000004567 concrete Substances 0.000 description 3
- 239000006028 limestone Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920005646 polycarboxylate Polymers 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 3
- WURBVZBTWMNKQT-UHFFFAOYSA-N 1-(4-chlorophenoxy)-3,3-dimethyl-1-(1,2,4-triazol-1-yl)butan-2-one Chemical compound C1=NC=NN1C(C(=O)C(C)(C)C)OC1=CC=C(Cl)C=C1 WURBVZBTWMNKQT-UHFFFAOYSA-N 0.000 description 2
- 206010013642 Drooling Diseases 0.000 description 2
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 2
- SHZGCJCMOBCMKK-JFNONXLTSA-N L-rhamnopyranose Chemical compound C[C@@H]1OC(O)[C@H](O)[C@H](O)[C@H]1O SHZGCJCMOBCMKK-JFNONXLTSA-N 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 2
- 208000008630 Sialorrhea Diseases 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 210000004556 brain Anatomy 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- IVJISJACKSSFGE-UHFFFAOYSA-N formaldehyde;1,3,5-triazine-2,4,6-triamine Chemical compound O=C.NC1=NC(N)=NC(N)=N1 IVJISJACKSSFGE-UHFFFAOYSA-N 0.000 description 2
- 239000008103 glucose Substances 0.000 description 2
- 150000004676 glycans Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920001282 polysaccharide Polymers 0.000 description 2
- 239000005017 polysaccharide Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000011044 quartzite Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- 229910052845 zircon Inorganic materials 0.000 description 2
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 2
- AEMOLEFTQBMNLQ-AQKNRBDQSA-N D-glucopyranuronic acid Chemical compound OC1O[C@H](C(O)=O)[C@@H](O)[C@H](O)[C@H]1O AEMOLEFTQBMNLQ-AQKNRBDQSA-N 0.000 description 1
- UYUXSRADSPPKRZ-SKNVOMKLSA-N D-glucurono-6,3-lactone Chemical compound O=C[C@H](O)[C@H]1OC(=O)[C@@H](O)[C@H]1O UYUXSRADSPPKRZ-SKNVOMKLSA-N 0.000 description 1
- SHZGCJCMOBCMKK-UHFFFAOYSA-N D-mannomethylose Natural products CC1OC(O)C(O)C(O)C1O SHZGCJCMOBCMKK-UHFFFAOYSA-N 0.000 description 1
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- IAJILQKETJEXLJ-UHFFFAOYSA-N Galacturonsaeure Natural products O=CC(O)C(O)C(O)C(O)C(O)=O IAJILQKETJEXLJ-UHFFFAOYSA-N 0.000 description 1
- 229920001479 Hydroxyethyl methyl cellulose Polymers 0.000 description 1
- PNNNRSAQSRJVSB-UHFFFAOYSA-N L-rhamnose Natural products CC(O)C(O)C(O)C(O)C=O PNNNRSAQSRJVSB-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 239000011400 blast furnace cement Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 150000007942 carboxylates Chemical class 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000003925 fat Substances 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 229940097043 glucuronic acid Drugs 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000002940 repellent Effects 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- IIACRCGMVDHOTQ-UHFFFAOYSA-N sulfamic acid Chemical compound NS(O)(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-N 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
本発明は、土木・建築分野で使用されるグラウト用セメント組成物、グラウト用モルタル組成物、グラウト用セメントペースト、及びグラウト用モルタルに関する。 The present invention relates to a cement composition for grout, a mortar composition for grout, a cement paste for grout, and a mortar for grout used in the field of civil engineering and construction.
一般に土木・建築工事において、充填施工されるセメントペースト又はモルタルをグラウト材料と呼ぶが、グラウト材料には、ＰＣグラウト、プレパックドコンクリート用グラウト、トンネルやシールドの裏込めグラウト、プレキャスト用グラウト、構造物の補修・補強グラウト、橋梁の支承下グラウト、舗装床板下グラウト、軌道床板下グラウト、及び原子力発電所格納容器下グラウトなどがある。 In general, cement paste or mortar filled in civil engineering and construction work is called grout material, but grout materials include PC grout, prepacked concrete grout, tunnel and shield backfill grout, precast grout, and structures. Repair / reinforcement grout, bridge support grout, pavement floor grouting, track floor grouting, and nuclear power plant containment grouting.
近年、土木・建築構造物に使われるコンクリートの品質が高性能化し、グラウト材料に要求される性能が高度化している。 In recent years, the quality of concrete used for civil engineering and building structures has improved, and the performance required for grout materials has become higher.
グラウト材料に要求される性能の一つに、流動性が良好でその保持性能が良好であることが挙げられるが、流動性が良すぎると、その分、充填時に型枠等の隙間からグラウト材料が流出するトラブルがあり、流出時のだれが止まらなくなり、充填した箇所に空隙が生じたり、型枠等に付着したグラウト材料の除去に手間がかかるなどの課題があった。 One of the performances required for grout materials is that they have good fluidity and good holding performance. However, if the fluidity is too good, the grout material can be removed from the gaps in the mold when filling. There is a problem that the spilling out occurs, the drooling at the time of the spilling does not stop, a gap is generated in the filled portion, and it is troublesome to remove the grout material adhering to the formwork or the like.
セメント、ポゾラン微粉末、減水剤、発泡剤、消泡剤、及び細骨材を含有してなるセメントモルタル組成物を使用して、優れた流動性や優れた流動性の保持性能が得られるセメントモルタルが提案された（特許文献１参照）。
しかしながら、特許文献１には、デュータンガムを併用すること、デュータンガムを併用することによって、だれる量を低減する（低だれ性）を付与することについては記載がない。
Cement with excellent fluidity and excellent fluidity retention performance using cement mortar composition containing cement, pozzolanic fine powder, water reducing agent, foaming agent, antifoaming agent, and fine aggregate Mortar has been proposed (see Patent Document 1).
However, in Patent Document 1, there is no description about giving a drooling amount (low dripping property) by using detan gum in combination with detan gum.
また、施工箇所に余剰水が存在する場合、通常、余剰水を除去してからグラウト材料を充填するが、余剰水を除去するのが困難な箇所では、余剰水の除去が不充分なままグラウト材料を充填してしまう場合もある。その際、グラウト材料と余剰水が混合され、充分な強度発現性が得られないという課題もあった。 In addition, when surplus water is present at the construction site, the grout material is usually filled after the surplus water is removed. However, in a location where it is difficult to remove surplus water, the grout remains with insufficient surplus water removal. In some cases, the material is filled. At that time, there was also a problem that the grout material and surplus water were mixed and sufficient strength development was not obtained.
流出時のだれる量を低減するために、アクリル系やセルロース系の増粘剤を配合したグラウト材も提案されている（特許文献２参照）。
しかしながら、アクリル系やセルロース系の増粘剤を用いてもだれの量を低減する効果が充分でない場合があり、また、その効果を高めるために、増粘剤の添加量を増加した場合には、グラウト材の強度が低下するという課題があった。
In order to reduce the amount of dripping at the time of outflow, a grout material containing an acrylic or cellulose thickener has also been proposed (see Patent Document 2).
However, even if an acrylic or cellulose thickener is used, the effect of reducing the amount of anyone may not be sufficient, and when the amount of thickener added is increased to increase the effect, There was a problem that the strength of the grout material was lowered.
また、主に、工業用や水処理分野の増粘安定剤として使用されているバイオガムの一種であるデュータンガムをセメント分野に使用することは検討されている（特許文献３、特許文献４参照）。
しかしながら、特許文献３や特許文献４には、高流動性を有するセメント組成物やモルタルの記載はあるものの、「高流動性」と相反する性能である「低だれ性」を併せ持つことについての記載はない。
In addition, the use of detan gum, which is a kind of biogum used as a thickening stabilizer in industrial and water treatment fields, in the cement field has been studied (see Patent Documents 3 and 4).
However, in Patent Document 3 and Patent Document 4, although there is a description of a cement composition or mortar having high fluidity, it is a description of having “low dripping” which is a performance contrary to “high fluidity”. There is no.
そこで、本発明者は、前記課題を解決すべく、種々の努力を重ねた結果、特定の材料を組み合わせることにより、流動性が良いため充填性が良好であり、流出時のだれる量を低減する効果も大きく、余剰水が存在する箇所に充填しても余剰水と混合されにくく、さらに、強度発現性にも優れたグラウト用セメント組成物、グラウト用モルタル組成物、グラウト用セメントペースト、及びグラウト用モルタルが得られることを知見し、本発明を完成するに至った。 Therefore, the present inventor has made various efforts to solve the above problems, and as a result of combining specific materials, the fluidity is good and the filling property is good, and the amount of dripping is reduced. The grout cement composition, the grout mortar composition, the grout cement paste, and the grout cement composition, which are not easily mixed with the surplus water even when filled in the location where the surplus water exists, The inventors have found that a mortar for grout can be obtained, and have completed the present invention.
本発明は、充填性が良好で施工性に優れ、流出時、だれる量が少なく、作業性が良好で、充填箇所での空隙の発生を低減でき、余剰水が存在する箇所に充填しても余剰水と混合されにくく、さらに高い強度発現性を有するグラウト用セメント組成物、グラウト用モルタル組成物、グラウト用セメントペースト、及びグラウト用モルタルを提供する。 The present invention has a good filling property, excellent workability, a small amount of dripping at the time of outflow, good workability, can reduce the generation of voids at the filling point, and fill the place where surplus water exists. Further, the present invention provides a grout cement composition, a grout mortar composition, a grout cement paste, and a grout mortar that are difficult to be mixed with excess water and have high strength.
本発明は、上記の課題を解決するために、以下の手段を採用する。
（１）本発明は、セメントとシリカ質微粉末からなる結合材、減水剤、消泡剤、及びデュータンガムを含有してなり、前記セメント100質量部に対して、前記シリカ微粉末が４〜12質量部であり、前記減水剤が0.01〜３質量部であり、前記デュータンガムが0.005〜0.020質量部であることを特徴とするグラウト用セメント組成物である。
（２）前記シリカ質微粉末が、シリカフュームであることを特徴とする前記（１）のグラウト用セメント組成物である。
（３）前記消泡剤が、セメント100質量部に対して、0.002〜0.2質量部であることを特徴とする前記（１）又は（２）のグラウト用セメント組成物である。
（４）前記（１）〜（３）のうちのいずれかのグラウト用セメント組成物と、細骨材とを含有してなることを特徴とするグラウト用モルタル組成物である。
（５）前記細骨材が、前記グラウト用セメント組成物中のセメントとシリカ質微粉末からなる結合材100質量部に対して、200質量部以下であることを特徴とする前記（４）のグラウト用モルタル組成物である。
（６）前記（１）〜（３）のうちのいずれかのグラウト用セメント組成物と水を混合してなることを特徴とするグラウト用セメントペーストである。
（７）前記水が、前記グラウト用セメント組成物中の、セメントとシリカ質微粉末からなる結合材100質量部に対して、15〜23質量部であることを特徴とする前記（６）のグラウト用セメントペーストである。
（８）前記（４）又は（５）のグラウト用モルタル組成物と水を混合してなることを特徴とするグラウト用モルタルである。
（９）前記水が、前記グラウト用モルタル組成物中のセメントとシリカ質微粉末からなる結合材100質量部に対して、15〜23質量部であることを特徴とする前記（８）のグラウト用モルタルである。
The present invention employs the following means in order to solve the above problems.
(1) The present invention comprises a binder comprising a cement and a siliceous fine powder, a water reducing agent, an antifoaming agent, and a detan gum, and the silica fine powder is 4 to 12 per 100 parts by mass of the cement. are parts by weight, the water reducing agent is 0.01 to 3 parts by weight, the Deyutangamu is grout cement composition characterized 0.005-0.020 parts by der Rukoto.
(2) The grout cement composition according to (1), wherein the siliceous fine powder is silica fume.
( 3 ) The grout cement composition according to (1) or (2 ), wherein the antifoaming agent is 0.002 to 0.2 parts by mass with respect to 100 parts by mass of cement.
( 4 ) A grout mortar composition comprising the grout cement composition according to any one of (1) to ( 3 ) and a fine aggregate.
The (5) before Symbol fine aggregate, characterized in that the binding material 100 parts by mass consisting of cement and siliceous fine powder of the grout cement composition is 200 parts by mass or less (4) A mortar composition for grout.
( 6 ) A grout cement paste obtained by mixing the grout cement composition according to any one of (1) to ( 3 ) and water.
(7) the water, the grout cement composition, relative to the binder 100 parts by weight consisting of cement and siliceous fine powder, characterized in that 15 is 23 parts by weight said (6) A cement paste for grout.
( 8 ) A grout mortar comprising the mortar composition for grout of ( 4 ) or ( 5 ) and water.
(9) the water, grout of the (8), characterized in that the binding material 100 parts by mass consisting of cement and siliceous fine powder of the grout mortar composition is 15 to 23 parts by weight Mortar for use.
本発明によれば、良好な充填性を有し、流出時、だれる量が少なく、余剰水と混合されにくく、硬化後の強度発現性にも優れるセメントペースト又はモルタルとなり、土木・建築工事において充填施工されるグラウト材料として適用できる。 According to the present invention, a cement paste or mortar that has good filling properties, has a small amount of dripping at the time of outflow, is difficult to be mixed with surplus water, and has excellent strength development properties after curing, in civil engineering and construction work. It can be applied as a grout material to be filled.
以下、本発明を詳細に説明する。
なお、本発明における部や％は、特に断らない限り質量規準で示す。
Hereinafter, the present invention will be described in detail.
In addition, unless otherwise indicated, the part and% in this invention are shown by a mass reference | standard.
本発明で使用するセメントとしては、特に限定されるものではないが、JIS R 5210に規定されている各種ポルトランドセメント、JIS R 5211、JIS R 5212、及びJIS R 5213に規定された各種混合セメント、JISに規定された以上の混和材混入率で製造した高炉セメント、フライアッシュセメント、シリカセメント、及び石灰石粉末等を混合したフィラーセメントから選ばれる一種又は二種以上等が挙げられる。 The cement used in the present invention is not particularly limited, but various portland cements defined in JIS R 5210, various mixed cements defined in JIS R 5211, JIS R 5212, and JIS R 5213, One or two or more types selected from blast furnace cement, fly ash cement, silica cement, and filler cement mixed with limestone powder, etc., manufactured with the admixture mixing rate specified in JIS or higher can be used.
本発明で使用するシリカ質微粉末は、流動性や充填性、さらに、硬化後の強度発現性を向上させるために用いるもので、高炉水砕スラグ微粉末、フライアッシュ、及びシリカフュームなどの潜在水硬性物質やポゾラン物質を挙げることができ、そのうち、シリカフュームの使用が好ましく、酸性シリカフュームの使用がより好ましい。 The siliceous fine powder used in the present invention is used to improve fluidity and filling properties, and further to improve the strength development after hardening, and latent water such as blast furnace granulated slag fine powder, fly ash, and silica fume. Examples thereof include a hard substance and a pozzolanic substance. Among them, the use of silica fume is preferable, and the use of acidic silica fume is more preferable.
酸性シリカフュームとは、シリカフューム１ｇを純水100ccに入れて攪拌したときの上澄み液のｐＨが5.0以下の酸性を示すシリカフュームである。酸性シリカフュームのなかでは、優れた流動性が得られる面で、酸化ジルコニウムを含有するシリカヒュームが好ましい。 The acidic silica fume is a silica fume exhibiting acidity with a pH of a supernatant of 5.0 or less when 1 g of silica fume is added to 100 cc of pure water and stirred. Among acidic silica fume, silica fume containing zirconium oxide is preferable in terms of obtaining excellent fluidity.
酸化ジルコニウムを含有するシリカヒュームは、例えば、以下の工程により製造される。まず、電気炉にて、ジルコンサンドをおよそ2,200℃まで電融し、ジルコンサンドの微粒子の平均粒径をおよそ１μｍとして略均一に安定化させ、二次凝集を防止するべく電融温度を段階的に上昇させる。次に所定のサイクロンを複数直列に連結させて粗粒子を除去し、粒子を回収した後、サイロ内で再攪拌し、粒径のばらつきを小さくする。このようにして製造された酸化ジルコニウムを含有するシリカヒュームは、従来から使用されている、例えば、フェロシリコン製造時に副生するシリカフュームに比べて、粒径がおよそ２〜10倍大きくなりやすい。
酸化ジルコニウムを含有するシリカヒュームの酸化ジルコニウムの含有率は、１〜10％が好ましく、３〜６％がより好ましい。
Silica fume containing zirconium oxide is produced, for example, by the following steps. First, in the electric furnace, the zircon sand is melted to approximately 2,200 ° C, the average particle size of the fine particles of the zircon sand is approximately 1 μm, and is stabilized almost uniformly, and the melting temperature is stepped to prevent secondary aggregation. To rise. Next, a plurality of predetermined cyclones are connected in series to remove coarse particles, and after the particles are collected, they are stirred again in the silo to reduce the variation in particle size. Silica fume containing zirconium oxide produced in this way is likely to have a particle size that is approximately 2 to 10 times larger than that of silica fume that is conventionally used, for example, by-product during ferrosilicon production.
The content of zirconium oxide in the silica fume containing zirconium oxide is preferably 1 to 10%, and more preferably 3 to 6%.
シリカ質微粉末の粉末度は特に限定されるものではないが、通常、高炉水砕スラグ微粉末やフライアッシュは、ブレーン比表面積値（以下、ブレーン値という）で3,000〜9,000cm2/gが好ましく、シリカフュームは、ＢＥＴ比表面積値（以下、ＢＥＴ面積という）で８〜200m2/gが好ましい。ただし、酸化ジルコニウムを含有するシリカヒュームのＢＥＴ面積は８〜13m2/gが好ましい。 The fineness of the siliceous fine powder is not particularly limited. Usually, blast furnace granulated slag fine powder and fly ash have a specific surface area value (hereinafter referred to as “brain value”) of 3,000 to 9,000 cm 2 / g. Silica fume preferably has a BET specific surface area value (hereinafter referred to as a BET area) of 8 to 200 m 2 / g. However, the BET area of silica fume containing zirconium oxide is preferably 8 to 13 m 2 / g.
シリカ質微粉末の使用量は、セメント100部に対して、４〜12部であり、６〜10部が好ましい。２部未満では練り混ぜ時や充填時の負荷が大きくなったり、強度発現性が不充分となる場合があり、14部を超えると所定の水量で優れた流動性が得られなくなったり、強度発現性が不充分となる傾向がある。 The amount of the fine silica fine powder, to the cement 100 parts is 4 to 12 parts, 6-10 parts virtuous preferable. If it is less than 2 parts, the load at the time of mixing and filling may increase, and the strength development may be insufficient. If it exceeds 14 parts, excellent fluidity cannot be obtained with a predetermined amount of water, and the strength development may occur. Tend to be inadequate.
本発明で使用する減水剤は、強度発現性向上のため、少ない練り混ぜ水量で高流動性を得るために用いるもので、特に限定されるものではないが、ポリアルキルアリルスルホン酸塩系高性能減水剤、芳香族アミノスルホン酸塩系高性能減水剤、メラミンホルマリン樹脂スルホン酸塩系高性能減水剤、及びポリカルボン酸塩系高性能減水剤等が挙げられ、そのうち、減水効果の高い、ポリカルボン酸塩系高性能減水剤が好ましい。具体的には、ポリアルキルアリルスルホン酸塩系高性能減水剤としては、第一工業製薬社製商品名「セルフロー１１０Ｐ」や出光石油化学社製商品名「ＩＰＣ」などが、また、芳香族アミノスルホン酸塩系高性能減水剤としては、花王社製商品名「マイティ１００」や三洋化成工業社製商品名「三洋レベロンＰ」などが、メラミンホルマリン樹脂スルホン酸塩系高性能減水剤のものとしては、シーカ社製商品名「シーカメントＦＦ８６／１００」などが、さらに、ポリカルボン酸塩系高性能減水剤としては、例えば、ＢＡＳＦポゾリス社製商品名「メルフラックスＡＰ１０１Ｆ」や花王社製商品名「マイティ２１ＰＺ」などが挙げられる。 The water reducing agent used in the present invention is used to obtain high fluidity with a small amount of kneading water in order to improve strength development, and is not particularly limited. Examples include water reducing agents, aromatic aminosulfonate-based high-performance water reducing agents, melamine formalin resin sulfonate-based high-performance water reducing agents, and polycarboxylate-based high-performance water reducing agents. Carboxylate high performance water reducing agents are preferred. Specifically, as the polyalkylallylsulfonate-based high-performance water reducing agent, trade name “Cellflow 110P” manufactured by Daiichi Kogyo Seiyaku Co., Ltd., trade name “IPC” manufactured by Idemitsu Petrochemical Co., Ltd. As sulfonate-based high-performance water reducing agents, the product name “Mighty 100” manufactured by Kao Corporation and the product name “Sanyo Reberon P” manufactured by Sanyo Kasei Kogyo Co., Ltd. are examples of melamine formalin resin sulfonate-based high-performance water reducing agents. Is a product name “SEICAMENT FF86 / 100” manufactured by Sika Corporation, and examples of the polycarboxylate-based high-performance water reducing agent include a product name “Melflux AP101F” manufactured by BASF Pozzolith Co., Ltd. Mighty 21PZ ".
減水剤の使用量は、セメント100部に対して、0.01〜３部であり、0.05〜３部が好ましい。0.01部未満では流動性が低下したり、練り混ぜ時や充填時の負荷が大きくなる傾向があり、６部を超えると流動性が高くなり、流出時のだれが止まりにくくなる傾向がある。 The amount of the water reducing agent with respect to cement 100 parts, and from 0.01 to 3 parts, 0.05-3 parts virtuous preferable. If it is less than 0.01 part, the fluidity tends to decrease or the load at the time of kneading or filling tends to increase, and if it exceeds 6 parts, the fluidity tends to be high, and the dripping tends to hardly stop.
本発明で使用する消泡剤は、グラウト材料練り混ぜ時に巻き込まれる空気量を低減し、強度発現性を向上させるために使用するもので、特に限定されるものではないが、作業性の面から、あらかじめセメントなどの原材料に混合しておくことが可能な粉末状の消泡剤を用いることが好ましい。
消泡剤としては、低級アルコール系消泡剤、高級アルコール系消泡剤、油脂系消泡剤、界面活性剤系消泡剤、及びシリコーン系消泡剤等があり、具体的には、粉末状の消泡剤としては、旭電化工業社製商品名「アデカネートＢ−１１５Ｆ」や、サンノプコ社製商品名「ＳＮデフォーマー１４ＨＰ」などが挙げられる。
The antifoaming agent used in the present invention is used to reduce the amount of air entrained during the mixing of the grout material and improve the strength development, and is not particularly limited, but from the viewpoint of workability It is preferable to use a powdery antifoaming agent that can be mixed in advance with raw materials such as cement.
Examples of antifoaming agents include lower alcohol defoaming agents, higher alcohol defoaming agents, fat and oil defoaming agents, surfactant defoaming agents, and silicone defoaming agents. Examples of the defoaming agent include Asahi Denka Kogyo's trade name “Adecanate B-115F” and San Nopco's trade name “SN Deformer 14HP”.
消泡剤の使用量は、通常、セメント100部に対して、0.001〜0.3部が好ましく、0.002〜0.2部がより好ましく、0.005〜0.1部がもっとも好ましい。0.001部未満では消泡効果が低下し、強度発現性が悪くなる傾向があり、0.3部を超えても消泡効果がそれ以上向上せず不経済となる傾向がある。 Usually, the amount of the antifoaming agent is preferably 0.001 to 0.3 part, more preferably 0.002 to 0.2 part, and most preferably 0.005 to 0.1 part with respect to 100 parts of cement. If it is less than 0.001 part, the defoaming effect tends to decrease and the strength development tends to deteriorate, and if it exceeds 0.3 part, the defoaming effect does not improve any more and tends to be uneconomical.
本発明で使用するデュータンガムとは、２個のグルコース、１個のグルクロン酸、及び３個のラムノースを構成単位とする、発酵法により製造した水溶性の天然高分子多糖類であるバイオガムの一種である。
デュータンガムは、セメントなどの材料を混練したペーストの流動性を損なわない程度に適度に増粘させ、充填後のだれる量を顕著に低下させることを可能にするものであり、白色〜淡黄褐色の粉末であって、水に可溶で、粘性の水溶液になり、この１％水溶液のｐＨはほぼ中性である。
デュータンガムの粒度は、80メッシュパスが95％以上である。
The deuteron gum used in the present invention is a kind of bio-gum that is a water-soluble natural high-molecular polysaccharide produced by a fermentation method, comprising 2 glucose, 1 glucuronic acid, and 3 rhamnose as structural units. is there.
Dutan gum is thickened moderately to such an extent that the fluidity of the paste kneaded with cement and other materials is not impaired, and the amount of dripping after filling can be significantly reduced. This powder is soluble in water and becomes a viscous aqueous solution, and the pH of this 1% aqueous solution is almost neutral.
The particle size of dutan gum is 95% or more at 80 mesh pass.
デュータンガムの使用量は、セメント100部に対して、0.005〜0.020部である。0.001部未満では増粘効果が低下し、流出時のだれが止まりにくくなる傾向や、余剰水が存在する箇所に充填した際、余剰水と混合され充分な強度発現性が得られにくい傾向があり、0.020部を超えると粘性が大きくなり、練り混ぜ時の負荷が大きくなる傾向や、ポンプなどで圧送する際の施工性が低下する傾向がある。 The amount of Deyutangamu, relative cement 100 parts, is 0.005 to 0.020 parts. If it is less than 0.001 part, the thickening effect will be reduced, and it will be difficult to stop dripping at the time of outflow, or it will tend to be difficult to obtain sufficient strength development by mixing with surplus water when filling the place where surplus water exists. If the amount exceeds 0.020 part, the viscosity increases, the load during kneading tends to increase, and the workability when pumping with a pump or the like tends to decrease.
本発明で使用する細骨材としては特に限定されるものではなく、その具体例としては、例えば、通常、ケイ石系や石灰石系の天然骨材、再生細骨材、並びに、ケイ石微粉末、石灰石微粉末、及び再生微粉末等の不活性な無機粉末が使用可能である。 The fine aggregate used in the present invention is not particularly limited, and specific examples thereof include, for example, usually a quartzite-based or limestone-based natural aggregate, a regenerated fine aggregate, and a quartzite fine powder. Inert inorganic powders such as fine limestone powder and regenerated fine powder can be used.
細骨材の使用量は、通常、グラウト用セメント組成物中のセメントとシリカ質微粉末からなる結合材100部に対して、250部以下が好ましく、200部以下がより好ましく、150部以下がもっとも好ましい。250部を超えると流動性や強度発現性が低下する傾向がある。 The amount of fine aggregate used is usually preferably 250 parts or less, more preferably 200 parts or less, and more preferably 150 parts or less with respect to 100 parts of the binder composed of cement and siliceous fine powder in the cement composition for grout. Most preferred. If it exceeds 250 parts, fluidity and strength development tend to be reduced.
本発明では、必要に応じ、アクリル系やセルロース系の増粘剤、アルミニウム粉末等の沈下抑制剤、撥水剤、及び抗菌剤等の各種セメント混和剤を併用することが可能である。 In the present invention, various cement admixtures such as an acrylic or cellulose thickener, a settlement inhibitor such as aluminum powder, a water repellent, and an antibacterial agent can be used in combination.
本発明のグラウト用セメントペースト及びグラウト用モルタルの練り混ぜ水量は、通常、セメントとシリカ質微粉末からなる結合材100部に対して、13〜26部が好ましく、15〜25部がより好ましく、17〜23部がもっとも好ましい。13部未満では練り混ぜ時の負荷が大きくなる傾向や、ポンプなどで圧送する際の施工性が低下する傾向があり、26部を超えると強度発現性が低下する傾向がある。 The amount of water for mixing the cement paste for grouting and the mortar for grouting of the present invention is usually preferably 13 to 26 parts, more preferably 15 to 25 parts, with respect to 100 parts of the binder composed of cement and siliceous fine powder. Most preferred is 17-23 parts. If it is less than 13 parts, the load at the time of kneading tends to increase, and the workability when pumping with a pump or the like tends to decrease, and if it exceeds 26 parts, the strength development tends to decrease.
以下、実験例にて詳細に説明する。 Hereinafter, it demonstrates in detail in an experiment example.
実験例１
セメント100部に対して、減水剤1.5部、消泡剤0.01部、デュータンガム0.008部、及び表１に示すシリカ質微粉末を加えてグラウト用セメント組成物を調製した。
調製したグラウト用セメント組成物中のセメントとシリカ質微粉末からなる結合材100部に対して、水を20部加えて練り混ぜ、セメントペーストを作製し、その静置フロー、圧縮強度、及びだれる量を測定した。結果を表１に併記する。
Experimental example 1
A cement composition for grout was prepared by adding 1.5 parts of water reducing agent, 0.01 part of defoaming agent, 0.008 part of detan gum, and fine siliceous powder shown in Table 1 to 100 parts of cement.
To 100 parts of the binder made of cement and siliceous fine powder in the prepared cement composition for grout, add 20 parts of water and knead to prepare a cement paste, its static flow, compressive strength, and The amount to be measured was measured. The results are also shown in Table 1.
＜使用材料＞
セメント ：普通ポルトランドセメント、市販品
シリカ質微粉末Ａ：酸化ジルコニウムを含有するシリカヒューム、酸化ジルコニウムの含有率５％、ＢＥＴ面積12m2/g、ｐＨ3.0、市販品
シリカ質微粉末Ｂ：フェロシリコン製造時、副生するシリカヒューム、ＢＥＴ面積19m2/g、市販品
シリカ質微粉末Ｃ：高炉水砕スラグ微粉末、ブレーン値4,000cm2/g、市販品
シリカ質微粉末Ｄ：フライアッシュ、ブレーン値4,000cm2/g、市販品
減水剤 ：ポリカルボン酸塩系高性能減水剤、市販品
消泡剤 ：高級アルコール系消泡剤、市販品
デュータンガム：２個のグルコースと１個のグルクロン酸と３個のラムノースを構成単位とする天然高分子多糖類、市販品
<Materials used>
Cement: Ordinary Portland cement, commercially available siliceous fine powder A: Silica fume containing zirconium oxide, zirconium oxide content 5%, BET area 12 m 2 / g, pH 3.0, commercially available siliceous fine powder B: Ferro Silica fume by-produced during silicon production, BET area 19 m 2 / g, commercially available siliceous fine powder C: ground granulated blast furnace slag, brane value 4,000 cm 2 / g, commercially available siliceous fine powder D: fly ash , Brain value 4,000cm 2 / g, Commercial water reducing agent: Polycarboxylate-based high-performance water reducing agent, Commercial product antifoaming agent: Higher alcohol-based antifoaming agent, Commercial product Dutan gum: 2 glucose and 1 glucuron Natural high-molecular polysaccharides containing acid and three rhamnose units, commercially available products
＜試験方法＞
静置フロー：JIS R 5201のフロー試験に準拠した。ただし、15回の落下運動は行わず、コーン引き上げ後のフローの広がりを測定した。
圧縮強度 ：JSCE-G 505に準拠した。材齢28日。
だれる量 ：グリースガンのカートリッジ中に作製したグラウト用セメントペーストを100g充填し、角度90°に設置したコンパネに押し当ててから吐出した。全量吐出後、グラウト用セメントペーストの上部からだれ落ちた部分の長さを測定した。
<Test method>
Static flow: compliant with JIS R 5201 flow test. However, the spreading of the flow after lifting the cone was measured without performing 15 drop motions.
Compressive strength: Conforms to JSCE-G 505. Age 28 days.
Leakage amount: 100 g of grout cement paste prepared in a grease gun cartridge was filled, pressed against a panel installed at an angle of 90 °, and then discharged. After the entire amount was discharged, the length of the portion that fell from the top of the grout cement paste was measured.
実験例２
セメント100部に対して、シリカ質微粉末８部、消泡剤0.01部、デュータンガム0.008部、及び表２に示す量の減水剤を加えてグラウト用セメント組成物を調製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。
Experimental example 2
Experimental Example 1 except that 8 parts of siliceous fine powder, 0.01 part of defoaming agent, 0.008 part of detan gum, and a water reducing agent in the amount shown in Table 2 were added to 100 parts of cement to prepare a cement composition for grout. As well as. The results are also shown in Table 2.
実験例３
セメント100部に対して、シリカ質微粉末８部、減水剤1.5部、デュータンガム0.008部、及び表３に示す量の消泡剤を加えてグラウト用セメント組成物を調製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。
Experimental example 3
Experimental Example 1 except that 8 parts of siliceous fine powder, 1.5 parts of a water reducing agent, 0.008 parts of detan gum, and an antifoaming agent in an amount shown in Table 3 were added to 100 parts of cement to prepare a cement composition for grout. As well as. The results are also shown in Table 3.
実験例４
セメント100部に対して、シリカ質微粉末８部、減水剤1.5部、消泡剤0.01部、及び表４に示す量のデュータンガムを加えてグラウト用セメント組成物を調製し、水中採取圧縮強度を測定したこと以外は実験例１と同様に行った。結果を表４に併記する。
なお、比較のため、デュータンガムの代わりに市販の増粘剤を使用して同様に実験を行った。結果を表４に併記する。
Experimental Example 4
To 100 parts of cement, add 8 parts of siliceous fine powder, 1.5 parts of water reducing agent, 0.01 part of defoaming agent, and the amount of detan gum shown in Table 4 to prepare a cement composition for grout. The procedure was the same as in Experimental Example 1 except that the measurement was performed. The results are also shown in Table 4.
For comparison, an experiment was conducted in the same manner using a commercially available thickener instead of dutan gum. The results are also shown in Table 4.
＜使用材料＞
市販の増粘剤：主成分ヒドロキシエチルメチルセルロース、市販品
<Materials used>
Commercial thickener: Main component hydroxyethyl methylcellulose, commercial product
＜試験方法＞
水中採取圧縮強度：φ50×100mmサイズの型枠を水中に存置し、型枠上面から漏斗にてモルタルを流し込み、供試体を成形。材齢３日で脱型後、水中養生し、材齢28日で圧縮強度を測定。
<Test method>
Underwater sampling compression strength: A mold with a size of φ50 x 100 mm is placed in water, and mortar is poured from the upper surface of the mold with a funnel to mold the specimen. After demolding at 3 days of age, cured underwater, and measured compressive strength at 28 days of age.
実験例５
セメント100部に対して、シリカ質微粉末８部、減水剤1.5部、消泡剤0.01部、及びデュータンガム0.008部を加えてグラウト用セメント組成物を調製した。
調製したグラウト用セメント組成物中のセメントとシリカ質微粉末からなる結合材100部に対して、表５に示す質量の細骨材を加えてグラウト用モルタル組成物を調製し、ペーストの代わりにモルタルを使用して静置フロー、圧縮強度、及びだれる量を実験例１と同様に測定したこと以外は実験例１と同様に行った。結果を表５に併記する。
Experimental Example 5
A grout cement composition was prepared by adding 8 parts of siliceous fine powder, 1.5 parts of water reducing agent, 0.01 part of antifoaming agent, and 0.008 part of detan gum to 100 parts of cement.
A mortar composition for grouting is prepared by adding fine aggregates of the mass shown in Table 5 to 100 parts of a binder consisting of cement and siliceous fine powder in the prepared grouting cement composition, and instead of paste. The same procedure as in Experimental Example 1 was performed except that the static flow, compressive strength, and amount of dripping were measured in the same manner as in Experimental Example 1 using mortar. The results are also shown in Table 5.
実験例６
セメント100部に対して、シリカ質微粉末８部、減水剤1.5部、消泡剤0.01部、デュータンガム0.008部、及び表６に示す質量の細骨材を加えてグラウト用モルタル組成物を調製した。
調製したグラウト用モルタル組成物中のセメントとシリカ質微粉末からなる結合材100部に対して、表６に示す水を加えて練り混ぜたこと以外は実験例５と同様に行った。結果を表６に併記する。
Experimental Example 6
A mortar composition for grout was prepared by adding 8 parts of siliceous fine powder, 1.5 parts of water reducing agent, 0.01 part of defoaming agent, 0.008 part of detan gum, and fine aggregate with the mass shown in Table 6 to 100 parts of cement. .
It was carried out in the same manner as in Experimental Example 5 except that water shown in Table 6 was added and kneaded to 100 parts of a binder composed of cement and siliceous fine powder in the prepared mortar composition for grout. The results are also shown in Table 6.
本発明のグラウト用セメント組成物、及びグラウト用モルタル組成物は、充填性が良好で施工性に優れ、流出時、だれる量が少なく作業性が良好で、充填箇所での空隙の発生を低減でき、余剰水が存在する箇所に充填しても余剰水と混合されにくく、高い強度発現性を示す。
したがって、土木、建築工事に用いられるＰＣグラウト、プレパックドコンクリート用グラウト、トンネルやシールドの裏込めグラウト、プレキャスト用グラウト、構造物の補修・補強グラウト、橋梁の支承下グラウト、舗装床板下グラウト、軌道床板下グラウト、及び原子力発電所格納容器下グラウトなど広範に利用できる。
The cement composition for grouting and the mortar composition for grouting of the present invention have good filling properties and excellent workability. Even if it is filled in a place where surplus water exists, it is difficult to be mixed with surplus water and exhibits high strength development.
Therefore, civil engineering, PC grout used for construction work, grout for prepacked concrete, back grout for tunnels and shields, grout for precast, repair / reinforce grout for structures, grout under bridge support, grout under pavement floor, track It can be used in a wide range such as under-floor grout and nuclear power plant containment grout.
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