JPH0455354A - Cement admixture and cement composition - Google Patents
Cement admixture and cement compositionInfo
- Publication number
- JPH0455354A JPH0455354A JP16129090A JP16129090A JPH0455354A JP H0455354 A JPH0455354 A JP H0455354A JP 16129090 A JP16129090 A JP 16129090A JP 16129090 A JP16129090 A JP 16129090A JP H0455354 A JPH0455354 A JP H0455354A
- Authority
- JP
- Japan
- Prior art keywords
- cement
- water
- admixture
- concrete
- mixed
- 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.)
- Granted
Links
- 239000004568 cement Substances 0.000 title claims abstract description 37
- 239000000203 mixture Substances 0.000 title claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 17
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000011575 calcium Substances 0.000 claims abstract description 10
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 10
- 229920002678 cellulose Polymers 0.000 claims description 8
- 239000001913 cellulose Substances 0.000 claims description 8
- 229910052920 inorganic sulfate Inorganic materials 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 28
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 abstract description 6
- 238000000926 separation method Methods 0.000 abstract description 6
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 abstract description 3
- 239000004354 Hydroxyethyl cellulose Substances 0.000 abstract description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 abstract description 3
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 abstract description 3
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 abstract description 3
- 239000003607 modifier Substances 0.000 abstract 2
- 238000002156 mixing Methods 0.000 description 10
- 238000010276 construction Methods 0.000 description 8
- 238000009415 formwork Methods 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 238000010304 firing Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 229920000609 methyl cellulose Polymers 0.000 description 4
- 239000001923 methylcellulose Substances 0.000 description 4
- 235000010981 methylcellulose Nutrition 0.000 description 4
- 238000010998 test method Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000011398 Portland cement Substances 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 150000007524 organic acids Chemical class 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 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 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 2
- 239000004327 boric acid Substances 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 235000005985 organic acids Nutrition 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- KDYFGRWQOYBRFD-UHFFFAOYSA-N succinic acid Chemical compound OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 2
- 241000554155 Andes Species 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 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 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
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 229920001479 Hydroxyethyl methyl cellulose Polymers 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 239000004115 Sodium Silicate Substances 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
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000007798 antifreeze agent Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 229920003086 cellulose ether Polymers 0.000 description 1
- 235000015165 citric acid Nutrition 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 150000002222 fluorine compounds Chemical group 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000000174 gluconic acid Substances 0.000 description 1
- 235000012208 gluconic acid Nutrition 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 description 1
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 description 1
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 description 1
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- NOUUUQMKVOUUNR-UHFFFAOYSA-N n,n'-diphenylethane-1,2-diamine Chemical compound C=1C=CC=CC=1NCCNC1=CC=CC=C1 NOUUUQMKVOUUNR-UHFFFAOYSA-N 0.000 description 1
- 229920005615 natural polymer Polymers 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 235000011007 phosphoric acid Nutrition 0.000 description 1
- 150000003016 phosphoric acids Chemical class 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- -1 silicofluoride Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 239000001384 succinic acid Substances 0.000 description 1
- 235000000346 sugar Nutrition 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、土木分野において主として使用される、モル
タル又はコンクリートのセメント混和材及びそれを用い
たセメント組成物に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cement admixture for mortar or concrete, which is mainly used in the civil engineering field, and a cement composition using the same.
近年、通常のコンクリートを用いた、従来の水中コンク
リート工法に代わり、コンクリートそのものに水の洗い
作用に対する材料分離抵抗性をもたせた新しいコンクリ
ートによる施工が増加している。この種のコンクリート
は特殊水中コンクリートと呼ばれ、［特殊水中コンクリ
ート用混和剤を添加することにより、水中分離抵抗性を
付与されたコンクリート」と定義されている（［特殊水
中コンクリート・マニュアル（設計・施工）」、（財）
沿岸開発技術研究センター・（財）漁港漁村建設技術研
究所、山海堂発行、１９８６．１２）。In recent years, instead of the conventional underwater concrete construction method using ordinary concrete, there has been an increase in construction using new concrete in which the concrete itself has material separation resistance against the washing action of water. This type of concrete is called special underwater concrete, which is defined as ``concrete that has been given underwater separation resistance by adding an admixture for special underwater concrete.'' Construction)”, (Foundation)
Coastal Development Technology Research Center/Fishing Port and Village Construction Technology Research Institute, published by Sankaido, December 1986).
また、特殊水中コンクリート用混和剤は［水中に打設す
るコンクリートに添加して、コンクリートに粘稠性を付
与することにより、水中でのセメントと骨材の分離を抑
制する混和剤という」と定義されており（同上）、メチ
ルセルロース又はポリビニルアルコール等の天然又は合
成の高分子の使用（特開昭５７−１２３８５０号公報）
、ポリアクリルアミドの使用（特開昭５９−５４６５６
号公報）及び特定のアクリル系モノマーの使用（特開昭
６１−１１１９５１号公報）等が提案されている。In addition, special admixtures for underwater concrete are defined as ``admixtures that are added to concrete to be placed in water to give it consistency and prevent the separation of cement and aggregate in water.'' (same as above), and the use of natural or synthetic polymers such as methylcellulose or polyvinyl alcohol (Japanese Unexamined Patent Publication No. 123850/1982).
, use of polyacrylamide (JP-A-59-54656
JP-A-61-111951) and the use of specific acrylic monomers (JP-A-61-111951) have been proposed.
しかしながら、現状の特殊水中コンクリートは、その硬
化速度が従来のコンクリートと同等か、もしくは遅くな
る傾向にあり、緊急工事に適用することは不可能である
という１１！題があった。However, the current special underwater concrete tends to harden at the same or slower speed than conventional concrete, making it impossible to apply it to emergency construction. There was a problem.
本発明者らは係る現状に鑑み、急硬性と水中での材料分
離抵抗性及び適度な作業時間を付与するセメント混和材
について種々検討した結果、特定のセメント混和材が前
記の性能を付与するとの知見を得て本発明を完成するに
至った。In view of the current situation, the present inventors have conducted various studies on cement admixtures that provide rapid hardening, resistance to material separation in water, and appropriate working time, and have found that a specific cement admixture provides the above-mentioned performance. Based on this knowledge, we have completed the present invention.
〔課題を解決するための手段］
即ち、本発明は、カルシウムフロロアルミネート、無機
硫酸塩、凝結調節剤及びセルロース物質を主成分とする
セメント混和材であり、セメントと該セメント混和材を
主成分とするセメント組成物である。[Means for Solving the Problems] That is, the present invention is a cement admixture containing calcium fluoroaluminate, an inorganic sulfate, a setting regulator, and a cellulose material as main components, and a cement admixture containing cement and the cement admixture as main components. This is a cement composition.
以下、本発明の詳細な説明する。The present invention will be explained in detail below.
本発明に係るカルシウムフロロアルミネートとは、ｘＣ
ａＯ・ｙＡｌ、０．・ｚＣａＦ！（但し、ｘ／ｙ／ｚ／
＝ １１０．６５〜１．５１０．０１〜０．３２のモ
ル比）と示されるものである。Calcium fluoroaluminate according to the present invention is xC
aO・yAl, 0.・zCaF! (However, x/y/z/
= molar ratio of 110.65 to 1.510.01 to 0.32).
カルシウムフロロアルミネートは、石灰質原料、アルミ
ナ質原料及びフッ化物を主成分とする原料を、焼成物中
のＣａＯ１ＡｈＯｉ及びＣａＦ、のモル比が、ＣａＯを
１とすると、八ｌ！０．が０．６５〜１．５、ＣａＦｇ
が０．０１〜０．３２となるような割合に混合し、例え
ば、１，０００°Ｃ以上で焼成することにより得られる
。実用的には、さらに、粉砕したり、分級したりして、
適当な粉末度、例えば、ブレーン１ 、０００〜８，０
ＯＯｃｉ２／ｇにすることが好ましい。Calcium fluoroaluminate is made from a calcareous raw material, an alumina raw material, and a raw material whose main component is fluoride, and the molar ratio of CaO1AhOi and CaF in the calcined product is 8 liters when CaO is 1! 0. is 0.65-1.5, CaFg
It can be obtained by mixing in a ratio such that the ratio is 0.01 to 0.32 and firing at, for example, 1,000°C or higher. In practical terms, it can be further crushed and classified.
Appropriate fineness, e.g. Blaine 1,000-8,0
It is preferable to set it to OOci2/g.
ＣａＯ１Ａｈ０３及びＣａｂ、のモル比は、前記の範囲
であることが好ましく、前記範囲外の比率では、適度な
作業時間が得られなくなる恐れがある。The molar ratio of CaO1Ah03 and Cab is preferably within the above range; if the ratio is outside the above range, there is a risk that an appropriate working time may not be obtained.
焼成温度や焼成時間などの焼成条件、さらには、焼成装
置に、特に制限はなく、例えば、電気炉又はロータリー
キルンなどが使用可能である。There are no particular restrictions on the firing conditions such as firing temperature and firing time, and the firing apparatus, and for example, an electric furnace or a rotary kiln can be used.
焼成物の冷却方法についても、特に制限はなく、例えば
、水や高圧空気などによる急冷や、放置による徐冷など
を行うことも可能である。There are no particular limitations on the method of cooling the fired product, and for example, rapid cooling with water or high-pressure air, or slow cooling by leaving it is also possible.
得られた焼成物の形態も特に制限はなく、結晶質又は非
晶質、さらには、それらの共存物、例えば、混晶のいず
れであってもよい。また、その生成過程で混入される他
成分や不純物の存在も特に制限されるものではない。特
に、工業的プロセスにおいて、工業原料から、Ｓｉｎｇ
、Ｐｅ、Ｏ，、ＴｉＯ２、ＭｇＯ及びＳ０３等が、他成
分として混入することが予想されが、それらやその他事
可避不純物の混入量は２０重量％未満であって、本発明
のセメント混和材の特性を損なうことはない。The form of the obtained fired product is not particularly limited, and may be crystalline or amorphous, or a coexistence thereof, such as a mixed crystal. Furthermore, the presence of other components and impurities mixed in during the production process is not particularly limited. In particular, in industrial processes, Sing
, Pe, O, , TiO2, MgO, S03, etc. are expected to be mixed in as other components, but the amount of these and other unavoidable impurities mixed in is less than 20% by weight, and the cement admixture of the present invention does not impair its characteristics.
本発明に係る無機硫酸塩とは、アルカリ金属又はアルカ
リ土類金属の硫酸塩をいい、無水、半水並びに二本の硫
酸カルシウムの使用が好ましく、その中でも■型無水セ
ッコウのような難溶性又は不溶性のものが特に好ましい
。The inorganic sulfate according to the present invention refers to a sulfate of an alkali metal or alkaline earth metal, and it is preferable to use anhydrous, semi-aqueous, and two types of calcium sulfate. Insoluble ones are particularly preferred.
無機硫酸塩の粒度は、ブレーン２，０００〜ｔｏ、ｏｏ
。The particle size of the inorganic sulfate is Blaine 2,000~to,oo
.
ｃｍｔ／ｇが好ましく 、３．０００〜８，０００ｃｍ
２／ｇがより好ましい。cmt/g is preferable, 3,000 to 8,000 cm
2/g is more preferred.
無機硫酸塩の使用量は、カルシウムフロロアルミネート
１００重量部に対して、５０〜３００重量部が好ましく
、１００〜２００重量部がより好ましい。前記範囲外で
は、急硬性が不足するか、水中コンクリート組成物の長
期の安定性が損なわれる恐れがある。The amount of inorganic sulfate used is preferably 50 to 300 parts by weight, more preferably 100 to 200 parts by weight, based on 100 parts by weight of calcium fluoroaluminate. Outside the above range, rapid hardening may be insufficient or the long-term stability of the underwater concrete composition may be impaired.
本発明に係る凝結調節剤としては、クエン酸、酒石酸、
グルコン酸、コハク酸及びマレイン酸等の有機酸やそれ
らの塩類、炭酸ナトリウムや炭酸カリウムなどの炭酸ア
ルカリ、リン酸類やそれらの塩類、ホウ酸、ホウ酸アル
カリ、ケイフッ化物、でん粉、糖及びアルコール類等や
それらの混和物が挙げられ、中でも有機酸の使用が好ま
しい。特に、炭酸アルカリと有機酸の併用は最も好まし
い。The setting regulator according to the present invention includes citric acid, tartaric acid,
Organic acids and their salts such as gluconic acid, succinic acid and maleic acid, alkali carbonates such as sodium carbonate and potassium carbonate, phosphoric acids and their salts, boric acid, alkali boric acid, silicofluoride, starch, sugar and alcohols. etc. and mixtures thereof, among which organic acids are preferably used. In particular, the combination of an alkali carbonate and an organic acid is most preferred.
凝結調節剤の使用量は、適当な作業時間を得る面から、
カルシウムフロロアルミネート１００重量部に対して、
１〜３０重量部程度が好ましい。施工現場での適度な作
業時間は通常２０〜２４０分程度である。The amount of setting regulator to be used is determined from the viewpoint of obtaining an appropriate working time.
For 100 parts by weight of calcium fluoroaluminate,
About 1 to 30 parts by weight is preferable. The appropriate working time at the construction site is usually about 20 to 240 minutes.
本発明に係るセルロース物質とは、木材や綿の繊維成分
であるセルロースに各種置換基を導入したセルロースエ
ーテルであり、具体的には、メチルセルロース（ＭＣ）
、ヒドロキシエチルセルロース（ＨＥＣ） 、ヒドロキ
シエチルメチルセルロース（ｌ（Ｅ？ｌＣ）及びヒドロ
キシプロピルメチルセルロース（ＩＩＰＭｃ）等が知ら
れている。The cellulose material according to the present invention is cellulose ether, which is obtained by introducing various substituents into cellulose, which is a fiber component of wood and cotton, and specifically, methylcellulose (MC).
, hydroxyethylcellulose (HEC), hydroxyethylmethylcellulose (l(E?lC)), hydroxypropylmethylcellulose (IIPMc), and the like are known.
セルロース物質は、その重合度が２００以上のものが好
ましく、重合度が２００未満では、増粘効果（粘稠性付
与効果）が不十分となる恐れがある。セルロース物質は
市販品として容易に入手することが可能である。The cellulose material preferably has a degree of polymerization of 200 or more; if the degree of polymerization is less than 200, the thickening effect (viscosity imparting effect) may be insufficient. Cellulose materials are easily available as commercial products.
セルロース物質の使用量は、カルシウムフロロアルミネ
ート１００重量部に対して、２〜３０重量部が好ましい
。この範囲外では、水中コンクリート組成物の水中分離
抵抗性又は施工性が損なわれる恐れがある。The amount of cellulose material used is preferably 2 to 30 parts by weight per 100 parts by weight of calcium fluoroaluminate. Outside this range, the underwater separation resistance or workability of the underwater concrete composition may be impaired.
本発明に係るセメントとは、通常使用されている普通・
早強・超早強等の各種ポルトランドセメントや、それら
に高炉スラグ、フライアッシュ又はシリカを混合した各
種混合セメント、あるいは、ポルトランドセメントに膨
張剤を混合した膨張セメントや、アルミナセメントなど
の特殊セメント等である。The cement according to the present invention refers to commonly used ordinary cement.
Various types of Portland cement such as early strength and ultra early strength, various mixed cements made by mixing these with blast furnace slag, fly ash or silica, expanding cement made by mixing Portland cement with an expanding agent, special cement such as alumina cement, etc. It is.
本発明において、セメント混和材の使用量は、セメン目
００重量部に対して、５〜３０重量部が好ましく、この
範囲外では本発明の目的が達成できなくなる恐れがある
。In the present invention, the amount of the cement admixture to be used is preferably 5 to 30 parts by weight per 00 parts by weight of cement, and if it is outside this range, there is a risk that the object of the present invention may not be achieved.
本発明で使用する骨材は特に制限されるものではなく、
通常の骨材、例えば、けい砂、天然砂及び砂利等が使用
可能である。The aggregate used in the present invention is not particularly limited,
Conventional aggregates such as silica sand, natural sand and gravel can be used.
また、本発明ではその他の各種添加剤を併用することも
可能である。Moreover, in the present invention, it is also possible to use various other additives in combination.
ここでいう各種添加剤としては、例えば、ガラス繊維、
カーボン繊維及び鋼繊維等の繊維、ポリマーエマルジョ
ン、着色剤、ＡＥ剤、減水剤、ＡＨ減水剤、流動化剤、
防錆剤、保水剤、塩化カルシウムやケイ酸ソーダなどの
防水剤、発泡剤、起泡剤、水酸化カルシウムなどのカル
シウム塩及び防凍剤等が挙げられ、その中の一種又は二
種以上を、本発明の目的を実質的に阻害しない量で併用
することが可能である。The various additives mentioned here include, for example, glass fiber,
Fibers such as carbon fibers and steel fibers, polymer emulsions, colorants, AE agents, water reducing agents, AH water reducing agents, fluidizing agents,
Rust inhibitors, water retention agents, waterproofing agents such as calcium chloride and sodium silicate, foaming agents, foaming agents, calcium salts such as calcium hydroxide, antifreeze agents, etc., and one or more of them, It is possible to use them together in an amount that does not substantially inhibit the purpose of the present invention.
本発明のセメント混和材の混合装置としては、特に制限
されるものではないが、例えば、傾胴ミキサー、オムニ
ミキサー（千代田技研工業社製）、■型ミキサー、ヘン
シェルミキサー及びナラクーミキサー等の既存のいかな
る攪拌装置も使用可能である。The mixing device for the cement admixture of the present invention is not particularly limited, but for example, existing mixers such as a tilting mixer, an omni mixer (manufactured by Chiyoda Giken Kogyo Co., Ltd.), a type mixer, a Henschel mixer, a Narakoo mixer, etc. Any stirring device can be used.
また、各材料の混合方法としては、特に、制限されるも
のではなく、各々の材料を施工時に混合してもよいし、
予め一部もしくは全部を混合しておいても差支えない。In addition, the method of mixing each material is not particularly limited, and each material may be mixed at the time of construction,
There is no problem even if some or all of them are mixed in advance.
本発明においては、さらに、セメントとセメント混和材
に水を混合して水中コンクリートを調整することが可能
であるが、水の量は特に規定されるものではなく、従来
のコンクリートの調整に準じて決定することが可能であ
る。In the present invention, it is further possible to prepare underwater concrete by mixing water with cement and cement admixture, but the amount of water is not particularly specified, and can be prepared in accordance with conventional preparation of concrete. It is possible to decide.
水中コンクリートを製造する際に使用する混合装置も、
特に、制限されるものではなく、前記の混合装置の使用
が可能である。The mixing equipment used to produce underwater concrete is also
In particular, without limitation, it is possible to use the mixing devices described above.
また、本発明の水中コンクリートの施工方法としては、
従来の水中コンクリートの施工方法、例えば、トレミー
工法、コンクリートポンプ工法及び底開き容器工法等を
用いることが可能である。Furthermore, the method for constructing underwater concrete of the present invention includes:
It is possible to use conventional underwater concrete construction methods, such as the tremie method, concrete pump method, and open-bottom container method.
以下、本発明を実施例によりさらに具体的に説明する。 Hereinafter, the present invention will be explained in more detail with reference to Examples.
実施例１
石灰質原料として市販炭酸カルシウム、アルミナ質原料
として市販アルミナ及びフッ化物として試薬特級のフッ
化カルシウムを混合し、白金ルツボ中で電気炉を使用し
、１，７００°Ｃ１２時間の焼成条件で焼成後、水中に
投入して急冷し、カルシウムフロロアルミネートの焼成
物を得た。得られた焼成物を８８μ以下に粉砕した。焼
成物の分析結果を第１表に示す。Example 1 A mixture of commercially available calcium carbonate as a calcareous raw material, commercially available alumina as an alumina raw material, and reagent grade calcium fluoride as a fluoride was fired in a platinum crucible using an electric furnace at 1,700°C for 12 hours. After firing, it was poured into water and rapidly cooled to obtain a fired product of calcium fluoroaluminate. The obtained baked product was pulverized to 88 μm or less. Table 1 shows the analysis results of the fired product.
第 １ 表
次に第１表の焼成物を用いて、第２表に示す配合のコン
クリートを調製し、作業時間と、圧縮強度を測定し、水
中落下試験を行なった。使用材料及び試験方法は次の通
りである。結果を第３表に示す。Table 1 Next, concrete having the composition shown in Table 2 was prepared using the fired products shown in Table 1, the working time and compressive strength were measured, and an underwater drop test was conducted. The materials used and test methods are as follows. The results are shown in Table 3.
（使用材料）
セメント ：アンデスセメント社製普通ポルトランドセ
メント
無機硫酸塩：■型態水セッコウ、ブレーン５＋ ９００
ｃｍ ”／ｇ凝凝結調節剤ニゲルコンナナトリウム試薬
セルロース物質：電気化学社製、商品名［デンカスタビ
ライト」、主成分メチルセルロース細 骨 材：新潟県
姫用産川砂、比重２．６ 、ＦＭ２．６２粗 骨 材：
新潟県姫用産砕石、Ｇｍａｘ ２０ｍ／１％比重２．６
、Ｐ？’ｌ ６．７
ＡＥ減水剤 ：デンカブレース社製、商品名［ダーレッ
クス誓Ｒ０＾ｊ
（試験方法）
■作業時間（Ｈ，Ｔ、） ；
硬化し、流動性がなくなった時間。(Materials used) Cement: Ordinary Portland cement manufactured by Andes Cement Inorganic sulfate: ■Type water gypsum, Blaine 5+ 900
cm''/g Coagulation regulator Nigelconna sodium reagent Cellulose material: Manufactured by Denki Kagaku Co., Ltd., trade name [Denka Stabilite], main component methyl cellulose fine aggregate Material: Niigata prefecture Himeyo river sand, specific gravity 2.6, FM2.62 Coarse aggregate:
Crushed stone from Himeyo, Niigata Prefecture, Gmax 20m/1% specific gravity 2.6
,P? 'l 6.7 AE water reducing agent: Manufactured by Denka Brace Co., Ltd., product name: Dalex R0^j (Test method) ■Working time (H, T,); Time taken to harden and lose fluidity.
即ち、ミキサーで全材料を混合後、５００ｃｃのビーカ
ーに入れ静置し、横にしても流れなくなる時間。In other words, after mixing all the ingredients in a mixer, place them in a 500cc beaker and let it stand, and the time until it stops flowing even if you lay it down.
■圧縮強度；
直径１００１、高さ２００ｍｍの円筒形型枠を容器の中
に入れ、飲料水など、中性で練りまぜ水として好適な、
水温は２０±１°Ｃの水を入れ、水深を５０ｃｍになる
よう保持する。■Compressive strength: A cylindrical mold with a diameter of 100 mm and a height of 200 mm is placed in a container, and neutral water suitable for mixing, such as drinking water, is prepared.
Fill with water at a temperature of 20±1°C and maintain the water depth at 50cm.
型枠の上端に、直径１ＯＯＩＩＩＩＸ１１高さ３００ｍ
の円筒形の１０ｍ＋メツシュの金網を垂直に立て、金網
の上端が水面に接するようにセットする。練り上がった
水中コンクリートを金網を通して水面から静かに落下さ
せ型枠内に充填する。型枠１本あたりの水中コンクリー
トの投入量はおよそ２１とし、はぼ等しい量づつ１５回
に分けて投入する。投入に要する時間は、型枠１本につ
き３０秒以上１分以内とする。投入の前後で水深が変化
しないように調整する。水中コンクリートの投入を完了
した後、型枠を１５分間水中に静置し、その後、気中に
取り出す。At the top of the formwork, the diameter is 1OOIIIX11 and the height is 300m.
A cylindrical wire mesh of 10 m + mesh is stood vertically and set so that the top end of the wire mesh is in contact with the water surface. The mixed underwater concrete is gently dropped from the water surface through a wire mesh and filled into the formwork. The amount of underwater concrete to be added per formwork is approximately 21 kg, and the amount is divided into 15 approximately equal amounts. The time required for charging shall be between 30 seconds and 1 minute for each formwork. Adjust so that the water depth does not change before and after injection. After completing the pouring of underwater concrete, the formwork is left in the water for 15 minutes and then taken out into the air.
型枠内の水とコンクリートとの置換を促進する目的で型
枠の側面２方向を各々２〜３回軽く木槌で叩く。型枠の
内壁とコンクリートの境界面から水が出ないことを確認
した後、頂部の均しを行う。In order to promote the replacement of water and concrete within the formwork, lightly tap the two sides of the formwork two to three times on each side with a mallet. After confirming that no water comes out from the interface between the inner wall of the formwork and the concrete, level the top.
ＪＩＳ Ａ １１３２ ｒコンクリートの強度試験用供
試体の作り方」に準じ、以後の養生、キャッピング及び
脱型を行う。Subsequent curing, capping, and demolding are performed in accordance with JIS A 1132 r "How to make concrete strength test specimens."
このように、作成した供試体を、２０±３ ’Ｃの水中
標準養生し、ＪＩＳ Ａ １１０８ｆコンクリートの圧
縮強度試験方法］により圧縮強度を測定。The thus prepared specimen was cured in water at 20±3'C, and its compressive strength was measured according to JIS A 1108f concrete compressive strength test method.
なお、供試体の数は各バッチ３本とし、２バラ千計６本
の平均値を求める。The number of test specimens is 3 for each batch, and the average value of 6 specimens in total of 2,000 specimens is determined.
■水中落下試験；
外径１１０ ｍ 、高さ１５０Ｍの１ 、０００ｃｃビ
ーカーに、８００ｃｃの水を入れる。水中コンクリ−）
５ＱＱｇを１０等分して、水面から静かに落下させる
。この落下は１０秒から２０秒の間に終了させる。その
後３分間ビーカーを静置し、ビーカー内の水をスポイト
で、コンクリートが混ざらないように静かに６００ｃｃ
分取する。この分取した水を用いて、懸濁物質とｐＨを
測定
ｐＨの測定は３回実施し、その平均値をｐＨ値とした。■ Underwater drop test; 800 cc of water is poured into a 1,000 cc beaker with an outer diameter of 110 m and a height of 150 m. Underwater concrete)
Divide 5QQg into 10 equal parts and drop them gently from the water surface. The drop is completed between 10 and 20 seconds. After that, let the beaker stand still for 3 minutes, then use a dropper to pour 600cc of water into the beaker, being careful not to mix the concrete.
Separate. Using this fractionated water, suspended solids and pH were measured.The pH was measured three times, and the average value was taken as the pH value.
また、懸濁物質の測定は、ＪＩＳ Ｋ ０１０２ｒ工場
排水試験方法」に準じて行った。In addition, suspended solids were measured in accordance with JIS K 0102r Factory Wastewater Test Method.
実施例２
第３表の実験Ｎα１−６の配合を用いて、第２表のセメ
ント混和材の量を変化させた事以外は実施例１と同様に
行った。結果を第４表に示す。Example 2 The experiment was carried out in the same manner as in Example 1 except that the mixture of experiment Nα1-6 in Table 3 was used and the amount of the cement admixture in Table 2 was changed. The results are shown in Table 4.
第 ４ 表
セメント混和材は（ｋｇ／ボ）、濁度は（ｐｐｍ）〔発
明の効果〕
以上説明したように、本発明のセメント混和材は、水中
コンクリート用途に特に有用である。Table 4: Cement admixture (kg/bo), turbidity (ppm) [Effects of the Invention] As explained above, the cement admixture of the present invention is particularly useful for underwater concrete applications.
Claims (2)
結調節剤及びセルロース物質を主成分とするセメント混
和材。(1) Cement admixture whose main components are calcium fluoroaluminate, inorganic sulfate, setting regulator and cellulose material.
分とするセメント組成物。(2) A cement composition containing cement and the cement admixture according to claim 1 as main components.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02161290A JP3105521B2 (en) | 1990-06-21 | 1990-06-21 | Cement admixture and cement composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02161290A JP3105521B2 (en) | 1990-06-21 | 1990-06-21 | Cement admixture and cement composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0455354A true JPH0455354A (en) | 1992-02-24 |
| JP3105521B2 JP3105521B2 (en) | 2000-11-06 |
Family
ID=15732300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02161290A Expired - Fee Related JP3105521B2 (en) | 1990-06-21 | 1990-06-21 | Cement admixture and cement composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3105521B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002249357A (en) * | 2001-02-16 | 2002-09-06 | Nippon Jikkou Co Ltd | Antiwashout mortar composition for stiff consistency |
| CN107601953A (en) * | 2017-10-30 | 2018-01-19 | 兰新良 | A kind of cement products early strength agent |
-
1990
- 1990-06-21 JP JP02161290A patent/JP3105521B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002249357A (en) * | 2001-02-16 | 2002-09-06 | Nippon Jikkou Co Ltd | Antiwashout mortar composition for stiff consistency |
| JP4605918B2 (en) * | 2001-02-16 | 2011-01-05 | 日本ジッコウ株式会社 | Underwater gap filling method |
| CN107601953A (en) * | 2017-10-30 | 2018-01-19 | 兰新良 | A kind of cement products early strength agent |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3105521B2 (en) | 2000-11-06 |
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