JPH04164847A - Cement admixture and cement composition - Google Patents
Cement admixture and cement compositionInfo
- Publication number
- JPH04164847A JPH04164847A JP29307790A JP29307790A JPH04164847A JP H04164847 A JPH04164847 A JP H04164847A JP 29307790 A JP29307790 A JP 29307790A JP 29307790 A JP29307790 A JP 29307790A JP H04164847 A JPH04164847 A JP H04164847A
- Authority
- JP
- Japan
- Prior art keywords
- cement
- pts
- water
- admixture
- weight
- 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 45
- 239000000203 mixture Substances 0.000 title claims abstract description 16
- 239000011521 glass Substances 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 20
- 229920002678 cellulose Polymers 0.000 claims abstract description 10
- 239000001913 cellulose Substances 0.000 claims abstract description 10
- 229910052920 inorganic sulfate Inorganic materials 0.000 claims abstract description 8
- 239000000404 calcium aluminium silicate Substances 0.000 claims abstract description 5
- 235000012215 calcium aluminium silicate Nutrition 0.000 claims abstract description 5
- WNCYAPRTYDMSFP-UHFFFAOYSA-N calcium aluminosilicate Chemical compound [Al+3].[Al+3].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O WNCYAPRTYDMSFP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229940078583 calcium aluminosilicate Drugs 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 29
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 13
- 239000003795 chemical substances by application Substances 0.000 abstract description 8
- 238000004017 vitrification Methods 0.000 abstract description 7
- 238000000926 separation method Methods 0.000 abstract description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 5
- 229920000609 methyl cellulose Polymers 0.000 abstract description 5
- 239000001923 methylcellulose Substances 0.000 abstract description 5
- 239000003638 chemical reducing agent Substances 0.000 abstract description 4
- 239000000835 fiber Substances 0.000 abstract description 4
- 239000000377 silicon dioxide Substances 0.000 abstract description 4
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 abstract description 3
- 238000006116 polymerization reaction Methods 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 239000000839 emulsion Substances 0.000 abstract description 2
- 229920000642 polymer Polymers 0.000 abstract description 2
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 13
- 238000002156 mixing Methods 0.000 description 9
- 239000002994 raw material Substances 0.000 description 9
- 238000010276 construction Methods 0.000 description 8
- 238000009415 formwork Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 239000000292 calcium oxide Substances 0.000 description 6
- 235000012255 calcium oxide Nutrition 0.000 description 6
- 239000002893 slag Substances 0.000 description 5
- 239000003513 alkali Substances 0.000 description 4
- BYFGZMCJNACEKR-UHFFFAOYSA-N aluminium(i) oxide Chemical compound [Al]O[Al] BYFGZMCJNACEKR-UHFFFAOYSA-N 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 238000010998 test method Methods 0.000 description 4
- 239000011398 Portland cement Substances 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
- 238000001816 cooling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 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
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 2
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 2
- 229920001479 Hydroxyethyl methyl cellulose Polymers 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 235000011116 calcium hydroxide Nutrition 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- -1 etc.) Chemical compound 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 2
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 description 2
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 description 2
- 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 2
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- 235000005985 organic acids Nutrition 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 150000003839 salts Chemical class 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
- 239000002023 wood Substances 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 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
- 101100348017 Drosophila melanogaster Nazo gene Proteins 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
- 239000005909 Kieselgur Substances 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 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
- 238000003723 Smelting Methods 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
- 230000009471 action Effects 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
- 150000004645 aluminates Chemical class 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052925 anhydrite Inorganic materials 0.000 description 1
- 239000007798 antifreeze agent Substances 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 150000001642 boronic acid derivatives Chemical class 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000011575 calcium Substances 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
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- ILWNTWRKKKGJCG-UHFFFAOYSA-L calcium;sulfate;trihydrate Chemical class O.O.O.[Ca+2].[O-]S([O-])(=O)=O ILWNTWRKKKGJCG-UHFFFAOYSA-L 0.000 description 1
- 229910052799 carbon Inorganic materials 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
- 230000008859 change Effects 0.000 description 1
- 235000015165 citric acid Nutrition 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 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
- 238000005516 engineering process Methods 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 239000000174 gluconic acid Substances 0.000 description 1
- 235000012208 gluconic acid Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000006028 limestone Substances 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
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000000178 monomer 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
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 235000010333 potassium nitrate Nutrition 0.000 description 1
- 238000000634 powder X-ray diffraction Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000011160 research 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
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 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
- 150000008163 sugars Chemical class 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 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
- 238000004078 waterproofing Methods 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、セメント混和材、特に特殊水中コンクリート
用混和材およびこれを用いたセメント組成物に間する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to cement admixtures, particularly admixtures for special underwater concrete, and cement compositions using the same.
(従来の技術)
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、山海型発行、1986.12)。(Prior Art) 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 Sankai Kata, December 1986).
また、特殊水中コンクリート用混和荊は「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
制する混和剤をいう」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, a special admixture for underwater concrete refers to an admixture that is added to concrete to be placed in water to give it consistency and thereby suppress the separation of cement and aggregate in water. 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.
(発明が解決しようとする課題)
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
という課題があった。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か
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。(Problem to be solved by the invention) However, the current special underwater concrete has a problem that its hardening speed is the same as that of conventional concrete or tends to be slower, making it impossible to apply it to emergency construction. there were. In view of the current situation, the present inventors have conducted various studies on cement admixtures that provide rapid hardening and resistance to material separation in water, and have found that a specific cement admixture provides the above-mentioned performance. The present invention has now been completed.
(課題を解決するための手段)
即ち、本発明は、アルミノケイ酸カルシウムガラス、無
機硫酸塩およびセルロース物質を主成分としてなること
を特徴とするセメント混和材であり、さらに、このセメ
ント混和材とセメントを主成分としてなることを特徴と
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 characterized by comprising calcium aluminosilicate glass, an inorganic sulfate, and a cellulose material as main components, and further comprising a cement admixture and a cement admixture. This is a cement composition characterized by having as a main component.
以下、本発明の詳細な説明する。The present invention will be explained in detail below.
本発明に係るアルミノケイ酸カルシウムガラス(以下C
ASガラスという)は、その組成領域が、Cab:60
〜30重量%
A120ff : 20〜60〃
SiO□ : 5〜25〃
が好ましく、より好ましくは
CaO: 55〜30重量%
AlzOz : 30〜60〃
SiO□ :10〜20〃
である。CaOが30重量%未満あるいはAlzOsが
60重量%を超えると、急硬性に劣り、逆に、CaOが
60重量%を超過、あるいはAl2O,が20重量%未
満であると、凝結調整剤を多量添加しても瞬結してしま
い、作業性の点から好ましくない。また5i02が5重
量%未満であると、長期的な強度の伸びを期待できず、
逆に25重量%を超えると初期強度が小さい。なお、一
般の工業原料にはMgO、FezO3、Ti0z、K2
O、NazO等の不純物が当然含まれており、また、こ
れらの不純物は、CaO−^1□03−3iOz系のガ
ラス化領域を拡張することから、10重量%未満での存
在は好ましく、また急硬性、作業性、長期強度の伸び等
に問題は生じない。−船釣なガラスの融剤である硝酸ア
ルカリ(NaNO:+、KNO3等)、フン化カルシウ
ム(CaFz)やホウ砂等を加えることは、ガラスの融
点を下げることから好ましい。Calcium aluminosilicate glass (hereinafter referred to as C) according to the present invention
AS glass) has a composition range of Cab:60.
~30% by weight A120ff: 20-60〃SiO□: 5-25〃 is preferable, and more preferably CaO: 55-30% by weight AlzOz: 30-60〃SiO□: 10-20〃. If CaO is less than 30% by weight or AlzOs is more than 60% by weight, the rapid hardening will be poor; conversely, if CaO is more than 60% by weight or Al2O is less than 20% by weight, a large amount of setting modifier must be added. Even if it is used, it will cause instantaneous condensation, which is not preferable from the viewpoint of workability. Furthermore, if 5i02 is less than 5% by weight, long-term strength growth cannot be expected;
Conversely, if it exceeds 25% by weight, the initial strength will be low. In addition, general industrial raw materials include MgO, FezO3, TiOz, K2
Impurities such as O and NazO are naturally included, and since these impurities expand the vitrification region of the CaO-^1□03-3iOz system, their presence in an amount of less than 10% by weight is preferable. There are no problems with rapid hardening, workability, long-term strength growth, etc. - It is preferable to add alkali nitrate (NaNO:+, KNO3, etc.), calcium fluoride (CaFz), borax, etc., which are fluxing agents for glass, because they lower the melting point of the glass.
ここていうガラスとは、通常ガラス分野で言うものであ
り、すなわち「ガラス転移点を示すもの」である。なお
、全てがガラスである必要はなく、ガラス化率50重量
%以上であれば問題はない。より好ましくは70重量%
以上、更に好ましくは80重量%以上である。50重量
%未満であると、早強性の点で問題となる。The glass referred to here is what is commonly referred to in the field of glass, that is, it is "a material that exhibits a glass transition point." Note that it is not necessary that all of the material is glass, and there is no problem as long as the vitrification rate is 50% by weight or more. More preferably 70% by weight
The content is more preferably 80% by weight or more. If it is less than 50% by weight, problems arise in terms of early strength.
なお、ガラス化率の測定方法は、本発明のガラスを、1
000°C12時間(h)加熱後、5°C/分(m)の
冷却速度で徐冷し、粉末X線回折法により結晶鉱物のメ
インピークの面積S0を求め、本発明のガラス中の結晶
のメインピーク面積Sから、ガラス化率χを求めた。In addition, the method for measuring the vitrification rate is that the glass of the present invention is
After heating at 000°C for 12 hours (h), it was slowly cooled at a cooling rate of 5°C/min (m), and the area S0 of the main peak of the crystalline mineral was determined by powder X-ray diffraction method. The vitrification rate χ was determined from the main peak area S of .
χ(重量%)=100 X (1−−)S。χ (weight%) = 100 x (1--)S.
以上のCASガラスは、冶金あるいは金属製錬等におい
て副生ずる高炉水砕スラグの組成とは全く異なるもので
あり、本発明は、高炉水砕スラグの組成から、派生した
ものではない。ちなみに高炉水砕スラグの平均的な化学
組成は、Cab:40〜43重量%、MgO:5〜8重
量%、AIZO:l:13〜15重量%、およびSiO
□:31〜35重量%である。The composition of the above CAS glass is completely different from the composition of granulated blast furnace slag produced as a by-product in metallurgy or metal smelting, and the present invention is not derived from the composition of granulated blast furnace slag. Incidentally, the average chemical composition of granulated blast furnace slag is Cab: 40-43% by weight, MgO: 5-8% by weight, AIZO: 13-15% by weight, and SiO.
□: 31 to 35% by weight.
更に本発明のCASガラスは、アルミナセメントから派
生したものでもない。すなわち、通常のアルミナセメン
トのSiO□量は5重量%未満であり〔笠井順−、コン
クリート工学、第22巻、第8号、第67頁(1984
)) 、更にガラス化率は25%を超えることはない(
1964年、ロンドン市アカデミツクプレス インコー
ポレーテソド リミテ・νF発行、H,F、 W、 T
aylor著、ザ ケミストリー オブセメント(Th
e Chemistry of Cement) 、第
2巻、第16頁〕。Furthermore, the CAS glass of the present invention is not derived from alumina cement. That is, the amount of SiO□ in ordinary alumina cement is less than 5% by weight [Jun Kasai, Concrete Engineering, Vol. 22, No. 8, p. 67 (1984)
)), and the vitrification rate does not exceed 25% (
1964, Published by Academic Press, London, Limited, νF, H, F, W, T
The Chemistry of Cement (Th
e Chemistry of Cement), Volume 2, Page 16].
本発明に係るCASガラスの原料としては、CaO質原
料として、生石灰(Cab) 、消石灰(Ca(OH)
z )、石灰石(caco:+)等を用いることができ
、AIZO3質原料として、アルミナ、ボーキサイト、
ダイアスポア、長石、粘土等を用いることができ、Si
0g質原料として、ケイ砂、白土、ケイ藻土等を用いる
ことができる。あるいは、比較的安価な高炉スラグにC
aO質原料およびA1□03質原料を補うことによって
も達せられる。Raw materials for the CAS glass according to the present invention include quicklime (Cab) and slaked lime (Ca(OH)) as CaO raw materials.
), limestone (caco:+), etc. can be used, and as AIZO3 raw materials, alumina, bauxite,
Diaspores, feldspar, clay, etc. can be used, and Si
Silica sand, white clay, diatomaceous earth, etc. can be used as the 0g material. Alternatively, relatively inexpensive blast furnace slag can be
It can also be achieved by supplementing aO quality raw materials and A1□03 quality raw materials.
以上のCaO質原料、Al2O,質原料、5102質原
料を所定の割合で配合した後、直接通電式溶融炉あるい
は高周波炉を用いて溶融し、得られた溶融体を圧縮空気
や高圧水により吹飛ばす方法、あるいは水中に流し込む
方法により製造される。あるいは、ロータリーキルンで
溶融し、急冷することによってもCASガラスを製造で
きる。After blending the above CaO raw materials, Al2O raw materials, and 5102 raw materials in a predetermined ratio, they are melted using a direct current melting furnace or high frequency furnace, and the resulting melt is blown with compressed air or high-pressure water. Manufactured by either jetting or pouring into water. Alternatively, CAS glass can also be produced by melting it in a rotary kiln and rapidly cooling it.
CASガラスの粉末度は細かければ反応性が向上するの
で好ましく、特に、ブレーン比表面積で3.000 a
n2/g以上が好ましい。The finer the fineness of the CAS glass, the better the reactivity will be, and in particular, the finer the particle size is, the Blaine specific surface area is 3.000 a.
It is preferably n2/g or more.
本発明に係る無機硫酸塩とは、アルカリ金属またはアル
カリ土類金属の硫酸塩をいい、例えば、無水、半水、な
らびに三水の硫酸カルシウムが好ましいものとして挙げ
られ、その中でも■型無水セッコウのような難溶性また
は不溶性のものが、特に好ましいものとして挙げられる
。無機硫酸塩の粉末度は、通常3,000 an2/g
以上が好ましい。The inorganic sulfate according to the present invention refers to an alkali metal or alkaline earth metal sulfate, and preferable examples thereof include anhydrous, hemihydrate, and trihydrate calcium sulfates, and among them, type 1 anhydrous gypsum. Particularly preferred are those that are sparingly soluble or insoluble. The fineness of inorganic sulfate is usually 3,000 an2/g
The above is preferable.
無機硫酸塩の使用量は、CASガラス100重量部に対
して50〜300重量部、好ましくは100〜200重
量部である。50重量部未満では、急硬性の発現が不十
分であり、300重量部を超えると、セメント組成物の
寸法安定性が悪くなる恐れがある。The amount of inorganic sulfate used is 50 to 300 parts by weight, preferably 100 to 200 parts by weight, based on 100 parts by weight of CAS glass. If it is less than 50 parts by weight, the rapid hardening is insufficient, and if it exceeds 300 parts by weight, the dimensional stability of the cement composition may deteriorate.
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(HEMC)およびヒドロ
キシプロピルメチルセルロース(HPMC)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 (HEMC), hydroxypropylmethylcellulose (HPMC), 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。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.
セルロース物質は市販品として容易に入手することか可
能である。Cellulose materials can be easily obtained as commercial products.
セルロース物質の使用量は、CASガラス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 CAS glass. 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
張材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 super early strength, various mixed cements made by mixing these with blast furnace slag, fly ash, or silica, expanded cement made by mixing expansive materials with Portland cement, special cements 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、セメント
100重量部に対して、5〜30重量部か好ましく、こ
の範囲外では、本発明の目的か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 100 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、天然砂および砂利等が
使用可能である。The aggregate used in the present invention is not particularly limited, and ordinary aggregates such as silica sand, natural sand, gravel, etc. can be used.
また、本発明ではその他各種添加剤を併用することも可
能である。ここでいう各種添加剤としては、例えば、凝
結調整剤、ガラス繊維、カーボン繊維および鋼繊維等の
繊維、ポリマーエマルジョン、着色剤、AB剤、減水剤
、AE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および防凍剤等が挙
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か可能である。Moreover, in the present invention, it is also possible to use various other additives. The various additives mentioned here include, for example, setting modifiers, fibers such as glass fibers, carbon fibers, and steel fibers, polymer emulsions, colorants, AB agents, water reducing agents, AE water reducing agents, fluidizing agents, and rust preventive agents. , 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 may be used in the present invention. It is possible to use them together in an amount that does not substantially inhibit the purpose.
凝結調整剤としては、クエン酸、酒石酸、グルコン酸、
コハク酸およ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、アル
ミン酸アルカリ、ケイフッ化物、でん粉、糖およびアル
コール類やそれらの混和物が挙げられ、中でも有機酸の
使用か好ましい。As setting regulators, citric acid, tartaric acid, gluconic acid,
Organic acids such as succinic acid and maleic acid and their salts,
Examples include alkali carbonates such as sodium carbonate and potassium carbonate, phosphoric acids and their salts, boric acid, alkali borates, alkali aluminates, silicofluorides, starches, sugars, alcohols, and mixtures thereof.Among them, organic acids Use or preferred.
凝結調整剤の使用量は、適当な作業時間を得る面から、
CASガラス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.
It is preferably about 1 to 30 parts by weight per 100 parts by weight of CAS glass. A reasonable working time at the construction site is usually 20
~240 minutes.
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)、V型ミキサー、ヘン
シェルミキサーおよびナウターミキサ−等の既存のいか
なる撹拌装置も使用可能である。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(、各々の材
料を施工時に混合しでもよいし、予め一部もしくは全部
を混合しておいても差支えない。The mixing device for the cement admixture of the present invention is not particularly limited; Any stirring device can be used. Furthermore, there are no particular restrictions on the method of mixing each material (each material may be mixed at the time of construction, or some or all of the materials may be 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して決定することが可能であ
る。In the present invention, it is further possible to mix water with cement and cement admixtures to prepare underwater concrete, but the amount of water is not particularly specified and can be made in accordance with conventional preparation of concrete. It is possible to determine the
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およ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.
(実施例) 以下、本発明を実施例によりさらに詳しく説明する。(Example) Hereinafter, the present invention will be explained in more detail with reference to Examples.
実施例1
市販特級試薬のCaCO5、A12oz 、およびSi
n□を混合し、300gをカーボンるつぼに入れ、高周
波炉で約、000°Cに加熱溶融した後、水中に入れ急
冷し、第1表に示したA−Hの14種のガラスを合成し
た。なお、備考欄に示したように、A、B、HlJSK
、NはCaO−A1203−3iO□系のガラス化領域
内に無いため、CaFzを外割りで1重量%添加し溶融
急冷することによりガラス化した。また、L、M。Example 1 Commercially available special grade reagents CaCO5, A12oz, and Si
n□ was mixed, 300g was placed in a carbon crucible, heated and melted at approximately 000°C in a high frequency furnace, and then quenched in water to synthesize 14 types of glasses A to H shown in Table 1. . In addition, as shown in the remarks column, A, B, HlJSK
Since ,N was not within the vitrification region of the CaO-A1203-3iO□ system, 1% by weight of CaFz was added outside and vitrified by melting and rapidly cooling. Also, L, M.
Nは本発明以外の比較例である。これらのCASガラス
をそれぞれブレーン比表面積で4,000 an27g
になるまで粉砕した。分析結果を第1表に併記する。N is a comparative example other than the present invention. Each of these CAS glasses has a Blaine specific surface area of 4,000 an27g.
It was crushed until it was. The analysis results are also listed in Table 1.
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
中落下試験を行った。使用材料および試験方法は次の通
りである。結果を第3表に示す。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 ニ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 :■型無水石膏、ブレーン比表面積5,
900 am2/g
凝結調節剤 ニゲルコン酸ナトリウム(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
1、主成分メ
チルセルロース
細 骨 材 :新潟県姫用産 川砂、比重、6、FM
、62
粗 骨 材 :新潟県姫用産 砕石、軸ax 20m
/m 、比重、6 、FM6.7
AH減水材 :デンカブレース社製、商品名「ダー
レックスWRDA 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。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。(Materials used) Cement Manufactured by Niandes Cement, ordinary Portland cement Inorganic sulfate: ■-type anhydrite, Blaine specific surface area 5,
900 am2/g Set regulator Sodium nigerconate (reagent) Cellulose material: Manufactured by Denki Kagaku Co., Ltd., trade name "Denka Stabilite 1, main component methylcellulose fine aggregate: River sand from Himeyo, Niigata Prefecture, specific gravity, 6, FM
, 62 Coarse aggregate: Crushed stone from Himeyo, Niigata Prefecture, shaft ax 20m
/m, Specific gravity, 6, FM6.7 AH water-reducing material: Manufactured by Denka Brace Co., Ltd., product name: Dalex WRDA J (Test method) ■Working time (H, T,); Time taken for hardening and loss of fluidity. 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100n、高さ200fi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℃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 100n and a height of 200fi is placed in a container to prepare neutral water suitable for mixing, such as drinking water.
Fill with water at a temperature of 20±1℃ and maintain the water depth at 50cm.
型枠の上端に、直径100 n、高さ300 mの円筒
形の10mメソ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。A cylindrical 10 m mesh wire mesh with a diameter of 100 n and a height of 300 m is vertically placed on the upper end of the formwork, and set so that the upper end of the wire mesh is in contact with the water surface.
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。The mixed underwater concrete is gently dropped from the water surface through a wire mesh and filled into the formwork.
型枠1本あたりの水中コンクリートの投入量はおよそ2
1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。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。The amount of underwater concrete input per formwork is approximately 2
1, and divide into 15 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. Side 2 of the formwork for the purpose of promoting the replacement of water and concrete within the formwork.
Tap lightly with a mallet 2 to 3 times in each direction. 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」に準し、以後の養生、キャッピングおよ
び脱型を行う。このように、作成した供試体を、20±
3℃の水中標準養生し、JIS A 1108 r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。Subsequent curing, capping, and demolding are performed in accordance with JIS A 1132 r "How to make concrete strength test specimens." In this way, the prepared specimen was
After standard curing in water at 3°C, compressive strength was measured using JIS A 1108 r concrete compressive strength test method.
なお、供試体の数は各バッチ3本とし、2バッチ計6本
の平均値を求める。Note that the number of specimens is 3 in each batch, and the average value of 6 specimens in 2 batches is determined.
■水中落下試験;
外径110B、高さ150nの1 、000ccビーカ
ーに、800ccの水を入れる。水中コンクリート50
0g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。■ Underwater drop test; 800 cc of water is poured into a 1,000 cc beaker with an outer diameter of 110 B and a height of 150 n. underwater concrete 50
Divide 0g 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, and use a dropper to carefully remove 600 cc of water from the beaker, taking care not to mix the concrete with it. Using this fractionated water, suspended solids and pH were measured.
pHの測定は3回実施、その平均値をpH値とした。ま
た、懸濁物質の測定は、JIS K 0102「工場排
水試験方法」に準じて行った。The pH was measured three times, and the average value was taken as the pH value. Further, the measurement of suspended solids was carried out in accordance with JIS K 0102 "Industrial Wastewater Test Method".
第2表
粗骨材の最大寸法は(鶴)、水セメント比と細骨材率は
(%)
水、セメント、細骨材、粗骨材、セメント混和材及びA
E減水剤は単位量(kg/l)実施例2
第3表の実験隘1−5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平易外は、実施例1と同様に
行った。結果を第4表に示す。Table 2 Maximum dimensions of coarse aggregate (Tsuru), water-cement ratio and fine aggregate ratio (%) Water, cement, fine aggregate, coarse aggregate, cement admixture and A
E Water reducing agent is in unit amount (kg/l) Example 2 Using the formulation of Experimental No. 1-5 in Table 3, the amount of cement admixture in Table 2 was changed. I did the same. The results are shown in Table 4.
第4表
セメント混和材は(kg/m”)、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)?R和材および
セメント組成物は、水中コンクリート用途に特に有用で
ある。Table 4: Cement admixture (kg/m”), turbidity (ppm) (
Effects of the invention) As explained above, the cement of the present invention)? The R-wood and cement compositions are particularly useful in underwater concrete applications.
特許出願人 電気化学工業株式会社Patent applicant Denki Kagaku Kogyo Co., Ltd.
Claims (1)
びセルロース物質を主成分とすることを特徴とするセメ
ント混和材。 2、請求項1記載のセメント混和材、およびセメントを
主成分とすることを特徴とするセメント組成物。[Scope of Claims] 1. A cement admixture characterized by containing calcium aluminosilicate glass, inorganic sulfate and cellulose material as main components. 2. A cement composition comprising the cement admixture according to claim 1 and cement as main components.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP29307790A JP2975421B2 (en) | 1990-10-30 | 1990-10-30 | Cement admixture and cement composition |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP29307790A JP2975421B2 (en) | 1990-10-30 | 1990-10-30 | Cement admixture and cement composition |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04164847A true JPH04164847A (en) | 1992-06-10 |
JP2975421B2 JP2975421B2 (en) | 1999-11-10 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP29307790A Expired - Fee Related JP2975421B2 (en) | 1990-10-30 | 1990-10-30 | Cement admixture and cement composition |
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JP (1) | JP2975421B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008120621A (en) * | 2006-11-09 | 2008-05-29 | Denki Kagaku Kogyo Kk | Cement composition |
CN108117299A (en) * | 2017-12-31 | 2018-06-05 | 江苏申御特种建材有限公司 | A kind of composite fibre antimitotic agent and preparation method thereof |
CN115636619A (en) * | 2022-12-21 | 2023-01-24 | 北京市政路桥管理养护集团有限公司 | Composite material for tunnel concrete |
-
1990
- 1990-10-30 JP JP29307790A patent/JP2975421B2/en not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008120621A (en) * | 2006-11-09 | 2008-05-29 | Denki Kagaku Kogyo Kk | Cement composition |
CN108117299A (en) * | 2017-12-31 | 2018-06-05 | 江苏申御特种建材有限公司 | A kind of composite fibre antimitotic agent and preparation method thereof |
CN115636619A (en) * | 2022-12-21 | 2023-01-24 | 北京市政路桥管理养护集团有限公司 | Composite material for tunnel concrete |
Also Published As
Publication number | Publication date |
---|---|
JP2975421B2 (en) | 1999-11-10 |
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