JP4691368B2 - Cement composition - Google Patents
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- JP4691368B2 JP4691368B2 JP2005048664A JP2005048664A JP4691368B2 JP 4691368 B2 JP4691368 B2 JP 4691368B2 JP 2005048664 A JP2005048664 A JP 2005048664A JP 2005048664 A JP2005048664 A JP 2005048664A JP 4691368 B2 JP4691368 B2 JP 4691368B2
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- calcium aluminosilicate
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- 239000000203 mixture Substances 0.000 title claims description 28
- 239000004568 cement Substances 0.000 title claims description 26
- 235000012215 calcium aluminium silicate Nutrition 0.000 claims description 33
- 239000000404 calcium aluminium silicate Substances 0.000 claims description 32
- 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 description 32
- 229940078583 calcium aluminosilicate Drugs 0.000 claims description 32
- 239000000463 material Substances 0.000 claims description 28
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 18
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 16
- 229910021487 silica fume Inorganic materials 0.000 claims description 10
- 239000002893 slag Substances 0.000 claims description 8
- 239000004567 concrete Substances 0.000 claims description 7
- 239000010881 fly ash Substances 0.000 claims description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 39
- 239000000292 calcium oxide Substances 0.000 description 20
- 235000012255 calcium oxide Nutrition 0.000 description 20
- 239000002253 acid Substances 0.000 description 13
- 238000011161 development Methods 0.000 description 13
- 238000004017 vitrification Methods 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 230000036571 hydration Effects 0.000 description 9
- 238000006703 hydration reaction Methods 0.000 description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 8
- 230000007774 longterm Effects 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 238000002156 mixing Methods 0.000 description 7
- 239000004570 mortar (masonry) Substances 0.000 description 7
- 230000020169 heat generation Effects 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 239000003638 chemical reducing agent Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 230000002378 acidificating effect Effects 0.000 description 4
- 239000002956 ash Substances 0.000 description 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 4
- 239000000920 calcium hydroxide Substances 0.000 description 4
- 235000011116 calcium hydroxide Nutrition 0.000 description 4
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- 239000011398 Portland cement Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000006227 byproduct Substances 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- -1 limestone and shells Chemical compound 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 150000002823 nitrates Chemical class 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- KJFMBFZCATUALV-UHFFFAOYSA-N phenolphthalein Chemical compound C1=CC(O)=CC=C1C1(C=2C=CC(O)=CC=2)C2=CC=CC=C2C(=O)O1 KJFMBFZCATUALV-UHFFFAOYSA-N 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical class OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 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
- 229910018068 Li 2 O Inorganic materials 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 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
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000007798 antifreeze agent Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 229940043430 calcium compound Drugs 0.000 description 1
- 150000001674 calcium compounds Chemical class 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 229910001701 hydrotalcite Inorganic materials 0.000 description 1
- 229960001545 hydrotalcite Drugs 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229910052920 inorganic sulfate Inorganic materials 0.000 description 1
- 239000012212 insulator 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
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 150000002826 nitrites Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000006072 paste Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920006327 polystyrene foam Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000004936 stimulating effect Effects 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 238000004056 waste incineration 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
Description
本発明は、主に、土木・建築業界において使用されるセメント組成物に関する。 The present invention mainly relates to a cement composition used in the civil engineering and construction industry.
なお、本発明における部や％は特に規定しない限り質量基準で示す。
本発明で云うコンクリートとは、セメントペースト、セメントモルタル、セメントコンクリートを総称するものである。
In the present invention, “parts” and “%” are based on mass unless otherwise specified.
The concrete referred to in the present invention is a general term for cement paste, cement mortar, and cement concrete.
コンクリートの耐久性に関連した課題として、ひび割れの低減、耐酸性、長期安定性などが挙げられる。 Issues related to the durability of concrete include reduction of cracks, acid resistance, and long-term stability.
ひび割れの低減について見ると、その要因は数多く存在する。例えば、乾燥収縮や自己収縮によるひび割れや水和発熱によるひび割れなどの材料特性やコンクリートの配合に由来するものに加えて、構造的な側面や設計ミスによるひび割れの誘発などが挙げられる。中でも、水和発熱によるひび割れは、そのひび割れ幅が大きく、劣化因子の硬化体中への透過を容易にするため重要な問題である。 There are many reasons for the reduction of cracks. For example, in addition to material properties such as cracks due to drying shrinkage and self-shrinkage and cracks due to hydration heat generation and those derived from concrete blending, there are structural aspects and induction of cracks due to design errors. Among them, the crack due to hydration heat generation is an important problem because the crack width is large and the permeation of the deterioration factor into the cured body is facilitated.
また、コンクリートは、アルカリ性であるために耐酸性に乏しい材料である。耐酸性に優れる樹脂系材料は高価な上、耐光性や耐火性に劣るなどの技術的な問題があり、無機系材料で耐酸性に優れる材料の開発が強く待たれている。 In addition, concrete is a material with poor acid resistance because it is alkaline. Resin-based materials with excellent acid resistance are expensive and have technical problems such as inferior light resistance and fire resistance, and there is a strong demand for the development of inorganic materials with excellent acid resistance.
他方、CaOとAl2O3とSiO2を主成分とする、特定組成のカルシウムアルミノシリケートガラスセメントが提案されている（特許文献１）。また、特定組成のカルシウムアルミノシリケートガラスを無機硫酸塩と組み合わせてポルトランドセメントの混和材として用いる提案もされている（特許文献２）。
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、特定組成のカルシウムアルミノシリケートと、潜在水硬性物質やポゾラン物質を組み合わせることにより、流動性や初期強度発現性に優れ、水和発熱が小さく、耐酸性に優れ、長期強度が高いセメント組成物を提供することが可能であることを知見し、本発明を完成するに至った。 As a result of various efforts to solve the above problems, the present inventor is excellent in fluidity and initial strength expression by combining a calcium aluminosilicate having a specific composition with a latent hydraulic substance or a pozzolanic substance, The inventors have found that it is possible to provide a cement composition having a small hydration exotherm, excellent acid resistance, and high long-term strength, and have completed the present invention.
すなわち、本発明は、ブレーン比表面積で3000〜9000cm２/gでCaO/Al2O3モル比が2.0〜3.5でSiO2含有量が10〜25％のカルシウムアルミノシリケートと、高炉水砕スラグ微粉末、フライアッシュ、シリカフュームである潜在水硬性物質およびポゾラン物質の中から選ばれる１種または２種以上と刺激材とからなるセメント組成物であり、セメント組成物100部中、カルシウムアルミノシリケートが30〜90部であり、さらに、刺激材がカルシウムアルミノシリケートと潜在水硬性物質およびポゾラン物質の合計100部に対して1〜10部であるセメント組成物であり、前記セメント組成物を使用して作製したコンクリートである。 That is, the present invention relates to a calcium aluminosilicate having a Blaine specific surface area of 3000 to 9000 cm 2 / g, a CaO / Al 2 O 3 molar ratio of 2.0 to 3.5, and a SiO 2 content of 10 to 25%, and granulated blast furnace granulated slag. powder, fly ash, it is one or stimulus material and Tona Ru cement composition and two or more selected from among latent hydraulic material and pozzolanic material is silica fume, cement composition in 100 parts of calcium aluminosilicate 30-90 parts der is, furthermore, a cement composition is from 1 to 10 parts per 100 parts of the latent hydraulic material and pozzolanic material stimulus material and calcium aluminosilicate, use the previous SL cement composition It is the concrete produced by doing.
本発明のセメント組成物は、流動性や初期強度発現性に優れ、水和発熱が小さく、耐酸性に優れ、長期強度が高いなどの効果を奏する。 The cement composition of the present invention has excellent fluidity and initial strength development, small hydration heat generation, excellent acid resistance, and high long-term strength.
本発明のカルシウムアルノシリケートは、CaOとAl2O3とSiO2を主成分とする非晶質物質であり、CaO/Al2O3モル比が2.0〜3.5で、SiO2含有量が10〜25％の組成を有するものである。本発明では、CaO/Al2O3モル比が2.0〜3.5のカルシウムアルミノシリケートを用いる。CaO/Al2O3モル比が2.0未満では充分な強度発現性が得られない。また、逆に、CaO/Al2O3モル比が3.5を超えると充分な流動性や可使時間が得られない。SiO2含有量が10％未満では十分な流動性や可使時間が得られない場合があり、25％を超えると初期強度発現性が充分でない場合がある。 The calcium arnosilicate of the present invention is an amorphous substance mainly composed of CaO, Al 2 O 3 and SiO 2 , the CaO / Al 2 O 3 molar ratio is 2.0 to 3.5, and the SiO 2 content is 10 to It has a composition of 25%. In the present invention, calcium aluminosilicate having a CaO / Al 2 O 3 molar ratio of 2.0 to 3.5 is used. If the CaO / Al 2 O 3 molar ratio is less than 2.0, sufficient strength development cannot be obtained. Conversely, if the CaO / Al 2 O 3 molar ratio exceeds 3.5, sufficient fluidity and pot life cannot be obtained. If the SiO 2 content is less than 10%, sufficient fluidity and pot life may not be obtained, and if it exceeds 25%, the initial strength development may not be sufficient.
カルシウムアルミノシリケートを得る方法としては、CaO原料とAl2O3原料とSiO2原料を電気炉などによって熱処理して得る方法が挙げられる。CaO原料としては、例えば、石灰石や貝殻などの炭酸カルシウム、消石灰などの水酸化カルシウム、あるいは生石灰などの酸化カルシウムを挙げることができる。また、Al2O3原料としては、例えば、ボーキサイトやアルミ残灰と呼ばれる産業副産物のほか、アルミ粉などが挙げられる。そして、SiO2原料としては、例えば、ケイ石や粘土質のほか、各種産業から副生するシリカ質物質を挙げることができる。 Examples of a method for obtaining calcium aluminosilicate include a method in which a CaO raw material, an Al 2 O 3 raw material, and an SiO 2 raw material are heat-treated with an electric furnace or the like. Examples of the CaO raw material include calcium carbonate such as limestone and shells, calcium hydroxide such as slaked lime, and calcium oxide such as quick lime. Examples of the Al 2 O 3 raw material include aluminum by-products in addition to industrial by-products called bauxite and aluminum residual ash. Examples of the SiO 2 raw material include siliceous substances produced as by-products from various industries, in addition to silica and clay.
カルシウムアルミノシリケートを工業的に得る場合、不純物が含まれることがある。その具体例としては、Fe2O3、MgO、TiO2、ZrO2、MnO、Na2O、K2O、Li2O、S、P2O5、およびFなどが挙げられる。これらの不純物の存在は、本発明の目的を実質的に阻害しない範囲では特に問題とはならない。通常、これらの不純物の合計が10%以下の範囲では特に問題とはならない。 When calcium aluminosilicate is obtained industrially, impurities may be contained. Specific examples thereof include Fe 2 O 3 , MgO, TiO 2 , ZrO 2 , MnO, Na 2 O, K 2 O, Li 2 O, S, P 2 O 5 , and F. The presence of these impurities is not particularly problematic as long as the object of the present invention is not substantially impaired. Usually, there is no particular problem when the total of these impurities is 10% or less.
カルシウムアルミノシリケートのガラス化率は、70％以上が好ましく、90％以上がより好ましい。カルシウムアルミノシリケートのガラス化率が70％未満では、十分な強度発現性が得られない場合がある。 The vitrification rate of calcium aluminosilicate is preferably 70% or more, and more preferably 90% or more. If the vitrification rate of calcium aluminosilicate is less than 70%, sufficient strength development may not be obtained.
本発明のカルシウムアルミノシリケートの粒度は、特に限定されるものではないが、通常、ブレーン比表面積で3000〜9000cm２/gの範囲にあり、4000〜8000cm２/gの範囲のものがより好ましい。3000cm２/g未満では強度発現性が充分でない場合があり、9000cm２/gを超えるようなものは流動性や可使時間の確保が困難になる場合がある。 The particle size of the calcium aluminosilicate of the present invention is not particularly limited, but is usually in the range of 3000 to 9000 cm 2 / g in terms of Blaine specific surface area, and more preferably in the range of 4000 to 8000 cm 2 / g. If it is less than 3000 cm 2 / g, strength development may not be sufficient, and if it exceeds 9000 cm 2 / g, it may be difficult to ensure fluidity and pot life.
本発明の潜在水硬性物質およびポゾラン物質の中から選ばれる１種または２種以上としては、特に限定されるものではないが、高炉水砕スラグ微粉末、フライアッシュ、シリカヒュームなどが好ましい。
潜在水硬性物質やポゾラン物質の粉末度は、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とフライアッシュについては、ブレーン比表面積で3000〜9000cm2/g程度の範囲にあり、シリカヒュームについては、BET比表面積で2〜20m2/g程度の範囲にある。
本発明の中では、以下、潜在水硬性物質およびポゾラン物質を混和材と云う。
Although it does not specifically limit as 1 type (s) or 2 or more types chosen from the latent hydraulic material and pozzolanic material of this invention, Blast-furnace granulated slag fine powder, fly ash, silica fume, etc. are preferable.
The fineness of the latent hydraulic substance or pozzolanic substance is not particularly limited, but usually the granulated blast furnace slag powder and fly ash are in the range of 3000 to 9000 cm 2 / g in terms of Blaine specific surface area. Silica fume has a BET specific surface area of about 2 to 20 m 2 / g.
In the present invention, the latent hydraulic substance and the pozzolanic substance are hereinafter referred to as admixtures.
本発明の混和材は、強度発現性の改善や耐酸性の向上、可使時間の確保などの役割を担う。本発明では、混和材として、少なくとも、その一部にシリカフュームを使用することが好ましく、中でも酸性シリカフュームの使用がより好ましい。酸性シリカフュームとは、シリカフューム1gを純粋100ccに入れて攪拌した時の上澄み液のpHが5.0以下の酸性を示すものを言う。 The admixture of the present invention plays a role of improving strength development, improving acid resistance, and securing the pot life. In the present invention, it is preferable to use silica fume as at least a part of the admixture, and it is more preferable to use acidic silica fume. The acidic silica fume refers to an acidic silica fume having a pH of 5.0 or lower when the silica fume 1 g is put in 100 cc of pure and stirred.
本発明のセメント組成物における各材料の配合割合は、特に限定されるものではないが、通常、カルシウムアルミノシリケートと混和材からなるセメント組成物100部中、カルシウムアルミノシリケートは30〜90部が好ましく、50〜80部がより好ましく、混和材は10〜70部が好ましく、20〜50部がより好ましい。カルシウムアルミノシリケートが30部未満であったり、混和材が70部を超えると、充分な強度発現性が得られない場合がある。また、カルシウムアルミノシリケートが90部を超えたり、混和材が10部未満であると、水和発熱量が大きく、耐酸性や長期安定性が充分でない場合があり、カルシウムの溶脱も大きくなる傾向にある。 The blending ratio of each material in the cement composition of the present invention is not particularly limited, but usually in 100 parts of the cement composition composed of calcium aluminosilicate and admixture, 30 to 90 parts of calcium aluminosilicate is preferable. 50 to 80 parts is more preferable, and the admixture is preferably 10 to 70 parts, more preferably 20 to 50 parts. If the calcium aluminosilicate is less than 30 parts or the admixture exceeds 70 parts, sufficient strength development may not be obtained. If the calcium aluminosilicate exceeds 90 parts or the admixture is less than 10 parts, the calorific value of hydration is large, the acid resistance and long-term stability may not be sufficient, and calcium leaching tends to increase. is there.
水の使用量は、使用する目的、用途や各材料の配合割合によって変化するため、特に限定されるものではないが、通常、水セメント組成物比で30〜60％の範囲が好ましく、35〜55％がより好ましい。水セメント組成物比が30％未満では流動性を得ることが難しく、また、発熱量が極めて大きくなる。逆に60%を超えると強度発現性を確保することが困難なばかりか、長期的に強度低下を起す場合がある。また、カルシウムの溶脱も大きくなる傾向にある。 The amount of water used is not particularly limited because it varies depending on the purpose of use, application, and the blending ratio of each material, but is usually preferably in the range of 30 to 60% in terms of water cement composition ratio, 35 to 55% is more preferred. If the water cement composition ratio is less than 30%, it is difficult to obtain fluidity, and the calorific value becomes extremely large. On the other hand, if it exceeds 60%, it is difficult not only to ensure the strength development but also to cause a decrease in strength over the long term. In addition, calcium leaching tends to increase.
本発明では、本発明のカルシウムアルミノシリケートや混和材のほかに、刺激材を併用することができる。刺激材の具体例としては、例えば、カルシウム化合物（生石灰や消石灰、セッコウ類、硝酸塩、亜硝酸塩など）、各種のポルトランドセメント、アルカリ金属塩（ナトリウム、カリウム、リチウムなどの炭酸塩、重炭酸塩、硫酸塩、硝酸塩、亜硝酸塩など）、アルミニウム塩（硫酸塩や硝酸塩）を挙げることができる。
刺激材の使用量は、特に限定されるものではないが、通常、カルシウムアルミノシリケートと混和材の合計100部に対して、1〜10部の範囲で使用することが好ましく、2〜5部の範囲がより好ましい。刺激材の使用量が10部を超えると可使時間が極度に短くなったり水和発熱量が大きくなったりする場合があり、1部未満では強度発現性の向上効果が少ない。
In the present invention, in addition to the calcium aluminosilicate and admixture of the present invention, a stimulating material can be used in combination. Specific examples of the stimulant include, for example, calcium compounds (quick lime, slaked lime, gypsum, nitrate, nitrite, etc.), various portland cements, alkali metal salts (carbonates such as sodium, potassium, lithium, bicarbonates, (Sulfates, nitrates, nitrites, etc.) and aluminum salts (sulfates and nitrates).
The amount of the stimulant used is not particularly limited, but usually it is preferably used in the range of 1 to 10 parts with respect to 100 parts in total of the calcium aluminosilicate and the admixture, and 2 to 5 parts. A range is more preferred. If the amount of stimulant used exceeds 10 parts, the pot life may become extremely short or the hydration heat value may increase, and if it is less than 1 part, the effect of improving the strength is small.
さらに、本発明では、カルシウムアルミノシリケートや混和材、刺激材のほかに、石灰石微粉末、高炉徐冷スラグ微粉末、下水汚泥焼却灰やその溶融スラグ、都市ゴミ焼却灰やその溶融スラグ、パルプスラッジ焼却灰等の混和材料、減水剤、AE減水剤、高性能減水剤、高性能AE減水剤、凝結調整剤、消泡剤、増粘剤、防錆剤、防凍剤、収縮低減剤、ポリマー、繊維物質、ベントナイト等の粘土鉱物、ならびに、ハイドロタルサイトなどのアニオン交換体等のうちの１種または２種以上を、本発明の目的を実質的に阻害しない範囲で使用することが可能である。 Furthermore, in the present invention, in addition to calcium aluminosilicate, admixture, and stimulant, limestone fine powder, blast furnace slow-cooled slag fine powder, sewage sludge incineration ash and its molten slag, municipal waste incineration ash and its molten slag, pulp sludge Admixture materials such as incineration ash, water reducing agent, AE water reducing agent, high performance water reducing agent, high performance AE water reducing agent, setting modifier, antifoaming agent, thickener, rust preventive agent, antifreeze agent, shrinkage reducing agent, polymer, One or more of fiber materials, clay minerals such as bentonite, and anion exchangers such as hydrotalcite can be used as long as the object of the present invention is not substantially inhibited. .
本発明において、各材料の混合方法は特に限定されるものではなく、それぞれの材料を施工時に混合しても良いし、あらかじめ一部を、あるいは全部を混合しておいても差し支えない。 In the present invention, the mixing method of each material is not particularly limited, and the respective materials may be mixed at the time of construction, or a part or all of them may be mixed in advance.
混合装置としては、既存のいかなる装置も使用可能であり、例えば、傾胴ミキサ、オムニミキサ、ヘンシェルミキサ、Ｖ型ミキサ、およびナウタミキサなどの使用が可能である。 Any existing device can be used as the mixing device, and for example, a tilting barrel mixer, an omni mixer, a Henschel mixer, a V-type mixer, and a Nauta mixer can be used.
表１に示すような各種のカルシウムアルミノシリケート70部と、混和材イ30部を配合してセメント組成物を調製した。このセメント組成物を使用し、JIS R 5201に準じてモルタルを調製し、流動性、圧縮強度を測定した。また、耐酸性や促進加温法にて強度の低下現象を確認した。結果を表１に併記する。 Cement compositions were prepared by blending 70 parts of various calcium aluminosilicates as shown in Table 1 and 30 parts of admixture A. Using this cement composition, a mortar was prepared according to JIS R 5201, and fluidity and compressive strength were measured. In addition, a decrease in strength was confirmed by acid resistance and accelerated heating. The results are also shown in Table 1.
＜使用材料＞
カルシウムアルミノシリケートＡ：CaO/Al2O3モル比2.0、SiO2含有量10％、ガラス化率95％以上、ブレーン比表面積5000cm2/g
カルシウムアルミノシリケートＢ：CaO/Al2O3モル比2.5、SiO2含有量10％、ガラス化率95％以上、ブレーン比表面積5000cm2/g
カルシウムアルミノシリケートＣ：CaO/Al2O3モル比3.0、SiO2含有量10％、ガラス化率95％以上、ブレーン比表面積5000cm2/g
カルシウムアルミノシリケートＤ：CaO/Al2O3モル比3.5、SiO2含有量10％、ガラス化率95％以上、ブレーン比表面積5000cm2/g
カルシウムアルミノシリケートＥ：CaO/Al2O3モル比2.5、SiO2含有量10％、ガラス化率95％以上、ブレーン比表面積5000cm2/g
カルシウムアルミノシリケートＦ：CaO/Al2O3モル比2.5、SiO2含有量15％、ガラス化率95％以上、ブレーン比表面積5000cm2/g
カルシウムアルミノシリケートＧ：CaO/Al2O3モル比2.5、SiO2含有量20％、ガラス化率95％以上、ブレーン比表面積5000cm2/g
カルシウムアルミノシリケートＨ：CaO/Al2O3モル比2.5、SiO2含有量25％、ガラス化率95％以上、ブレーン比表面積5000cm2/g
混和材イ：高炉水砕スラグ微粉末、ブレーン比表面積4000cm2/g
水：水道水
細骨材：JIS R 5201で使用する標準砂
<Materials used>
Calcium aluminosilicate A: CaO / Al 2 O 3 molar ratio 2.0, SiO 2 content 10%, vitrification rate 95% or more, Blaine specific surface area 5000cm 2 / g
Calcium aluminosilicate B: CaO / Al 2 O 3 molar ratio 2.5, SiO 2 content 10%, vitrification rate 95% or more, Blaine specific surface area 5000cm 2 / g
Calcium aluminosilicate C: CaO / Al 2 O 3 molar ratio 3.0, SiO 2 content 10%, vitrification rate 95% or more, Blaine specific surface area 5000cm 2 / g
Calcium aluminosilicate D: CaO / Al 2 O 3 molar ratio 3.5, SiO 2 content 10%, vitrification rate 95% or more, Blaine specific surface area 5000cm 2 / g
Calcium aluminosilicate E: CaO / Al 2 O 3 molar ratio 2.5, SiO 2 content 10%, vitrification rate 95% or more, Blaine specific surface area 5000cm 2 / g
Calcium aluminosilicate F: CaO / Al 2 O 3 molar ratio 2.5, SiO 2 content 15%, vitrification rate 95% or more, Blaine specific surface area 5000cm 2 / g
Calcium aluminosilicate G: CaO / Al 2 O 3 molar ratio 2.5, SiO 2 content 20%, vitrification rate 95% or more, Blaine specific surface area 5000cm 2 / g
Calcium aluminosilicate H: CaO / Al 2 O 3 molar ratio 2.5, SiO 2 content 25%, vitrification rate 95% or more, Blaine specific surface area 5000cm 2 / g
Admixture A: Ground granulated blast furnace slag, Blaine specific surface area 4000cm 2 / g
Water: Tap water Fine aggregate: Standard sand used in JIS R 5201
＜測定方法＞
流動性：JIS R 5201に準じてフロー値を測定
圧縮強度：モルタルを型枠に詰めて4cm×4cm×16cmの成形体を作成し、材齢28日、91日の圧縮強度をJIS R 5201に準じて測定
簡易断熱温度上昇量：モルタル3000ccを発泡スチロール製容器に入れて、上面のみを開放状態として断熱体で覆い、熱電対を中心部に配設して最高到達温度を測定
促進加温後の強度比：材齢28日まで20℃の水中養生を行った供試体を、40℃の温水中に28日間入れて養生し、促進加温を行う前の圧縮強度に対する促進加温後の強度比を相対値（％）で表し評価
耐酸性（硫酸浸透深さ）：5％濃度の硫酸水溶液にモルタルを1ヶ月間浸漬し、硫酸浸透深さを調べることによって評価、硫酸浸透深さはモルタル断面にフェノールフタレインの１％アルコール溶液を噴霧し、赤変しなかった部分を硫酸浸透部分と見なして測定
<Measurement method>
Flowability: Measure flow value according to JIS R 5201 Compressive strength: Create a 4cm x 4cm x 16cm molded product by filling mortar into a mold, and compress the compressive strength at 28 days and 91 days to JIS R 5201 According to the measured simple adiabatic temperature rise: Put 3000 cc mortar in a polystyrene foam container, cover only the top surface with an insulator, and place a thermocouple in the center to measure the maximum temperature Strength ratio: Strength ratio after accelerated warming to compressive strength before accelerated heating by putting specimens that had been cured at 20 ℃ in water until 28 days of age into hot water at 40 ℃ for 28 days Expressed as a relative value (%) Evaluation acid resistance (sulfuric acid penetration depth): Evaluated by immersing the mortar in a 5% sulfuric acid aqueous solution for one month and examining the sulfuric acid penetration depth. A 1% alcohol solution of phenolphthalein is sprayed on the surface, and the part that does not turn red is immersed in sulfuric acid. Measurement is regarded as a part
表１より、本発明のセメント組成物を使用したモルタルは、流動性や初期強度発現性に優れ、水和発熱が小さく、耐酸性に優れ、長期強度が高いことが判る。 From Table 1, it can be seen that the mortar using the cement composition of the present invention is excellent in fluidity and initial strength development, small in hydration heat generation, excellent in acid resistance, and high in long-term strength.
カルシウムアルミノシリケートＦを使用し、混和材の種類と配合割合を表２に示すように変化したこと以外は実施例１と同様に行った。結果を表２に併記する。 The same procedure as in Example 1 was conducted except that calcium aluminosilicate F was used and the type and blending ratio of the admixture were changed as shown in Table 2. The results are also shown in Table 2.
＜使用材料＞
混和材ロ：フライアッシュ、ブレーン比表面積4000cm2/g
混和材ハ：酸性シリカフューム、BET比表面積15m2/g
混和材ニ：混和材イと混和材ロの等量混合物
<Materials used>
Admixture B: fly ash, brain specific surface area 4000cm 2 / g
Admixture C: Acidic silica fume, BET specific surface area 15m 2 / g
Admixture D: Equal mixture of Admixture A and Admixture B
表２より、本発明のセメント組成物を使用したモルタルは、流動性や初期強度発現性に優れ、水和発熱が小さく、耐酸性に優れ、長期強度が高いことが判る。 From Table 2, it can be seen that the mortar using the cement composition of the present invention is excellent in fluidity and initial strength development, small in hydration heat generation, excellent in acid resistance, and high in long-term strength.
カルシウムアルミノシリケートＦ50部と、混和材ニ50部からなるセメント組成物100部に対して、表３に示すように刺激材を加えたこと以外は実施例１と同様に行った。結果を表３に併記する。 The same procedure as in Example 1 was performed except that a stimulant was added as shown in Table 3 to 100 parts of a cement composition consisting of 50 parts of calcium aluminosilicate and 50 parts of admixture. The results are also shown in Table 3.
＜使用材料＞
刺激材α：市販の普通ポルトランドセメント、ブレーン比表面積3000cm2/g
刺激材β：市販の水酸化カルシウム、BET比表面積5m2/g
<Materials used>
Stimulant α: Commercially available ordinary Portland cement, Blaine specific surface area 3000 cm 2 / g
Stimulant β: Commercially available calcium hydroxide, BET specific surface area 5m 2 / g
表３より、本発明のセメント組成物に刺激材を含有させると、モルタルの強度発現性が向上することが判る。 From Table 3, it can be seen that when a stimulant is contained in the cement composition of the present invention, the strength development of mortar is improved.
本発明のセメント組成物は、流動性や初期強度発現性に優れ、水和発熱が小さく、耐酸性に優れ、長期強度が高いので、土木、建築分野などで広範に使用される。 The cement composition of the present invention is widely used in the civil engineering and construction fields because it has excellent fluidity and initial strength development, low hydration heat generation, excellent acid resistance, and high long-term strength.
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| JPH04164845A (en) * | 1990-10-30 | 1992-06-10 | Denki Kagaku Kogyo Kk | Cement admixture and cement composition |
| JPH04331750A (en) * | 1991-05-01 | 1992-11-19 | Denki Kagaku Kogyo Kk | Cement admixture and cement composition |
| JP2000302501A (en) * | 1999-04-21 | 2000-10-31 | Denki Kagaku Kogyo Kk | Cement admixture and cement composition |
| JP2003095717A (en) * | 2001-09-26 | 2003-04-03 | Denki Kagaku Kogyo Kk | Cement admixture, cement composition, and cement concrete obtained by using the same |
| JP2003171154A (en) * | 2001-12-05 | 2003-06-17 | Denki Kagaku Kogyo Kk | Cement admixture and cement composition |
| JP2004210557A (en) * | 2002-12-27 | 2004-07-29 | Taiheiyo Material Kk | Grout composition |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04164845A (en) * | 1990-10-30 | 1992-06-10 | Denki Kagaku Kogyo Kk | Cement admixture and cement composition |
| JPH04331750A (en) * | 1991-05-01 | 1992-11-19 | Denki Kagaku Kogyo Kk | Cement admixture and cement composition |
| JP2000302501A (en) * | 1999-04-21 | 2000-10-31 | Denki Kagaku Kogyo Kk | Cement admixture and cement composition |
| JP2003095717A (en) * | 2001-09-26 | 2003-04-03 | Denki Kagaku Kogyo Kk | Cement admixture, cement composition, and cement concrete obtained by using the same |
| JP2003171154A (en) * | 2001-12-05 | 2003-06-17 | Denki Kagaku Kogyo Kk | Cement admixture and cement composition |
| JP2004210557A (en) * | 2002-12-27 | 2004-07-29 | Taiheiyo Material Kk | Grout composition |
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