JPH02124753A - Blend for producing heavyweight concrete and production of heavyweight concrete - Google Patents
Blend for producing heavyweight concrete and production of heavyweight concreteInfo
- Publication number
- JPH02124753A JPH02124753A JP33457188A JP33457188A JPH02124753A JP H02124753 A JPH02124753 A JP H02124753A JP 33457188 A JP33457188 A JP 33457188A JP 33457188 A JP33457188 A JP 33457188A JP H02124753 A JPH02124753 A JP H02124753A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- cement
- organic polymer
- aggregate
- polymer dispersion
- 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
- 239000000203 mixture Substances 0.000 title claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 title claims description 17
- 239000004568 cement Substances 0.000 claims abstract description 45
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 38
- 229920000620 organic polymer Polymers 0.000 claims abstract description 31
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 24
- 239000004917 carbon fiber Substances 0.000 claims abstract description 24
- 239000004815 dispersion polymer Substances 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910052742 iron Inorganic materials 0.000 claims abstract description 19
- 239000004576 sand Substances 0.000 claims abstract description 12
- 239000007787 solid Substances 0.000 claims abstract description 11
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 11
- 239000000835 fiber Substances 0.000 claims description 10
- 239000004816 latex Substances 0.000 claims description 9
- 229920000126 latex Polymers 0.000 claims description 9
- 239000002174 Styrene-butadiene Substances 0.000 claims description 4
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 4
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 4
- 239000011398 Portland cement Substances 0.000 claims description 3
- 239000011115 styrene butadiene Substances 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- NTXGQCSETZTARF-UHFFFAOYSA-N buta-1,3-diene;prop-2-enenitrile Chemical compound C=CC=C.C=CC#N NTXGQCSETZTARF-UHFFFAOYSA-N 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 claims 1
- 238000009472 formulation Methods 0.000 claims 1
- 238000000926 separation method Methods 0.000 abstract description 15
- 238000004062 sedimentation Methods 0.000 abstract description 3
- 239000012615 aggregate Substances 0.000 abstract 1
- 230000005484 gravity Effects 0.000 description 25
- 239000000047 product Substances 0.000 description 13
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 6
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 239000013535 sea water Substances 0.000 description 5
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 229910052595 hematite Inorganic materials 0.000 description 3
- 239000011019 hematite Substances 0.000 description 3
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 description 2
- 239000010450 olivine Substances 0.000 description 2
- 229910052609 olivine Inorganic materials 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000029058 respiratory gaseous exchange Effects 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- CPGKMLVTFNUAHL-UHFFFAOYSA-N [Ca].[Ca] Chemical compound [Ca].[Ca] CPGKMLVTFNUAHL-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
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 1
- 229910052601 baryte Inorganic materials 0.000 description 1
- 239000010428 baryte Substances 0.000 description 1
- 239000011400 blast furnace cement Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- FDKAYGUKROYPRO-UHFFFAOYSA-N iron arsenide Chemical compound [Fe].[As]=[Fe] FDKAYGUKROYPRO-UHFFFAOYSA-N 0.000 description 1
- 235000014413 iron hydroxide Nutrition 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 125000000101 thioether group Chemical group 0.000 description 1
- 229910052861 titanite Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、比重が高く、化学的特性、機械的特性の優れ
た重量コンクリート製造用配合物及び重量コンクリート
の製造法に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a composition for producing heavy concrete having high specific gravity and excellent chemical and mechanical properties, and a method for producing heavy concrete.
（従来の技術及び発明が解決しようとする課題）骨材に
磁鉄鉱、チタン鉱、重晶石、かんらん石等の比重の高い
材料を用いたコンクリートは重量コンクリートといわれ
、消波ブロック、護岸堤等の１）６洋工事用コンクリー
ト、重量機械基盤用コンクリート、放射線遮へい用コン
クリート等として用いられている。(Prior art and problems to be solved by the invention) Concrete using materials with high specific gravity such as magnetite, titanite, barite, olivine, etc. as aggregate is called heavy concrete, and is used for wave-dissipating blocks, seawalls, etc. 1) It is used as concrete for construction, heavy machinery foundations, radiation shielding concrete, etc.
しかし、重量コンクリートの製造に際しては、その生コ
ンクリートとしての運搬中５打設中、のた硬化途中にお
いて、高比重の骨材が沈降 分離し易く、均質な高比重
重置コンクリートを製造することが困難である。However, when manufacturing heavy-duty concrete, high-density aggregates tend to settle and separate during transportation, pouring, and curing of fresh concrete, making it difficult to manufacture homogeneous high-density concrete. Have difficulty.
また、これを回避するために、生コンクリートの水／セ
メント比を小さくすると、施工性が悪くなり、製品重量
コンクリートの化学的、Ｉｔｉ械的詩的特性化する。Moreover, in order to avoid this, if the water/cement ratio of fresh concrete is reduced, workability deteriorates, and the chemical and mechanical characteristics of the product weight concrete deteriorate.
〈課題を解決するための手「Ｑ＞
本発明は、前記問題点に鑑みてなされたもので、生コン
クリートの運搬中、打設中、硬化途中等における高比重
骨材とセメントペーストとの比重差による分離を阻止し
、高比重、高強度で耐久性のｎ１した重量コンクリート
を提供するものであって、すなわち、（１）粗骨材とし
ての鉄鉱石及び細骨材としての砂鉄の総量７０〜９０重
量％、水／セメント比０．３〜０．７のセメントペース
ト８〜３０重量％、繊維長１〜１０Ｉの炭素繊維００５
〜１重量％及び及び有機ポリマーデイスパージョン０．
０５〜３重量％（ただし、固形分として）からなり、か
つ前記有機ポリマー／セメント比が２〜２０％であり、
炭素繊維と有機ポリマーディスパージョンの総量が４重
量％を越えないことを特徴とする重量コンクリート製造
配合物及び（２）粗骨材としての鉄鉱石及び細骨材とし
ての砂鉄の総量７０〜９０重量％、水／セメント比０゜
３〜０．７のセメントベースｌ−８〜３０重量％、繊維
長１〜１０糟糟の炭素繊維０，０５〜１重量％及び有機
ポリマーディスパージョンからなり、かつ有機ポリマー
ディスパージョン０．０５〜３重景％（ただし、固形分
として）からなり、かつ前記有機ポリマー／セメント比
が２〜２０％であり、炭素繊維と有機ポリマーディスパ
ージョンの総量が４重量％を越えない配合物を型枠内に
入れ養生硬化せしめることを特徴とする重量コンクリー
トの製造法である。<How to solve the problem "Q> The present invention was made in view of the above-mentioned problems. The purpose is to prevent separation due to differences and provide a heavy concrete with high specific gravity, high strength, and durability, namely (1) total amount of iron ore as coarse aggregate and iron sand as fine aggregate: ~90% by weight, cement paste with water/cement ratio 0.3-0.7 8-30% by weight, carbon fiber 005 with fiber length 1-10I
~1% by weight and organic polymer dispersion 0.
05 to 3% by weight (however, as solid content), and the organic polymer/cement ratio is 2 to 20%,
Heavy duty concrete production mix characterized in that the total amount of carbon fibers and organic polymer dispersion does not exceed 4% by weight and (2) the total amount of iron ore as coarse aggregate and iron sand as fine aggregate 70-90% by weight %, a cement base l-8 to 30% by weight with a water/cement ratio of 0°3 to 0.7, 0.05 to 1% by weight of carbon fibers with a fiber length of 1 to 10 gauze, and an organic polymer dispersion, and The organic polymer dispersion is comprised of 0.05 to 3% by weight (however, as a solid content), and the organic polymer/cement ratio is 2 to 20%, and the total amount of carbon fiber and organic polymer dispersion is 4% by weight. This is a method for producing heavy-duty concrete, which is characterized by placing a mixture of not more than
従来、重量コンクリートの製造において、かんらん石、
酸化鉄鉱石などの粗骨材に砂などの細骨材とセメント、
水とを混合して、これを打設施工していたが、粗骨材の
鉄鉱石は比重が高いため、下方へ沈んでしまう分離現象
が生じ、その結果不均質な組成の機械的、化学的特性の
劣化した重量コンクリート製品となってしまう問題があ
った。Traditionally, in the production of heavy concrete, olivine,
Coarse aggregate such as iron oxide ore, fine aggregate such as sand and cement,
The iron ore used as coarse aggregate has a high specific gravity, so a separation phenomenon occurs in which it sinks downwards, resulting in a non-uniform mechanical and chemical composition. There was a problem in that the result was a heavy concrete product with deteriorated physical properties.
本発明者は種々研究の結果、細骨材を比重の高い砂鉄と
することにより、そして混和剤に炭素繊維及び有機ポリ
マーディスパージョンを加えることにより、この分離現
象の発生を十分に防止できることを見出だした。As a result of various studies, the present inventor found that the occurrence of this separation phenomenon could be sufficiently prevented by using iron sand with a high specific gravity as the fine aggregate and by adding carbon fiber and an organic polymer dispersion to the admixture. I started.
細骨材に砂鉄を用いることによって、粗骨材、細骨材の
双方共に比重の高い材料とする一方、セメントと水から
なるセメントペースト分は比重の低い材′＃Ｉとなった
ので、比重差から粗、細骨材が沈降し、セメントペース
ト分が上方に残って、分離が生じるものと予想されたけ
れども、この子、忠を覆すことができた。さらに、粗骨
材に酸化酸化鉄鉱石を用いることにより、水、海水等の
化学環境に対する安定性を高めることができた。By using iron sand as the fine aggregate, both the coarse and fine aggregates have a high specific gravity, while the cement paste made of cement and water has a low specific gravity. Although it was expected that the coarse and fine aggregate would settle due to the difference and the cement paste would remain above, causing separation, this child was able to overturn Tadashi. Furthermore, by using oxidized iron oxide ore as the coarse aggregate, stability against chemical environments such as water and seawater could be improved.
骨材と水、海水との接触に際しては、骨材が硫化鉱であ
ると、硫黄分が気、水中の酸素、水及びセメントから生
成する水酸化カルシウムと反応して、（１）硫化鉄＋酸
素十水又は海水＋水酸化ｈｈシ’）＆Ｃ３［膨張］−石
石膏水酸化鉄
（２）石膏モフルミン酸カルシウム （セメント中の）
土水に）［膨張］：エトリンガイト
となり、組織内に膨張現象が生じる結果、重量コンクリ
ートの機械的強度が劣化し、１ヒ学的特性も劣化する。When the aggregate comes into contact with water or seawater, if the aggregate is sulfide ore, the sulfur content reacts with air, oxygen in the water, water, and calcium hydroxide generated from the cement, resulting in (1) iron sulfide + Oxygen water or seawater + hydroxide hh') & C3 [expansion] - gypsum iron hydroxide (2) gypsum calcium calcium fluorinate (in cement)
(Soil and water) [Expansion]: It becomes ettringite and an expansion phenomenon occurs within the structure, resulting in the deterioration of the mechanical strength of heavy concrete and the deterioration of its mechanical properties.
これに対して、本発明では粗骨材及び細骨材の両者に酸
（ヒ酸化鉄鉱石を用いるため、海水等の（ヒ学的環境下
で浸れた安定性を有するものとなる。On the other hand, in the present invention, since iron arsenide ore is used for both the coarse aggregate and the fine aggregate, the aggregate has stability in an arsenic environment such as seawater.
本発明では、このようにして粗、細骨材を共に高比重の
材料となすことによって、全体として高比重の重量コン
クリートを提供することができるのである。In the present invention, by using both the coarse and fine aggregates as materials with high specific gravity, it is possible to provide heavy concrete with a high specific gravity as a whole.
粗骨材の酸化鉄鉱石としては、赤鉄鉱、磁鉄鉱等があり
、比重が約４．０〜５．０、粒度が粒径的５〜６０１１
ＩＩｌのものが好適に使用される。Iron oxide ores for coarse aggregate include hematite, magnetite, etc., with a specific gravity of approximately 4.0 to 5.0 and a particle size of 5 to 6011.
III is preferably used.
細骨材の砂鉄としては、磁鉄鉱、赤鉄鉱、磁鉄鉱等を主
体し、比重が約４．０〜５．０、粒径が約５ｍｍ以下（
５０〜２００メツシュ程度）のものが１重用される。Fine aggregate iron sand is mainly composed of magnetite, hematite, magnetite, etc., and has a specific gravity of approximately 4.0 to 5.0 and a particle size of approximately 5 mm or less (
(approximately 50 to 200 mesh) is used for one purpose.
細骨材率は０．３〜０．５であり、０，３より少ないと
製品コンクリートが粗面化し、強度も不十分なものとな
り、かつ比重も低くなり、また施工に際し、セメントペ
ーストと粗骨材との分離現象が生じてしまう。０．５を
越えるとコンクリ−！〜配ａ物の流動性がなくなり、ワ
ーカビリティのよいものとならない。The fine aggregate ratio is 0.3 to 0.5, and if it is less than 0.3, the finished concrete will have a rough surface, insufficient strength, and low specific gravity. A separation phenomenon from the aggregate occurs. If it exceeds 0.5, concrete! ~The fluidity of handouts is lost, resulting in poor workability.
幌骨材量は製品重量コンクリートの７０〜９０重１％で
あり、７０重量％より少ないと製品の比重が低くなり、
かつ不経済なものとなり、９０重量％を越えると施工性
が悪化する。The amount of hood aggregate is 70-90% of the product weight concrete, and if it is less than 70% by weight, the specific gravity of the product will be low.
Moreover, it becomes uneconomical, and if it exceeds 90% by weight, workability deteriorates.
セメントとしては、普通ポルトランドセメント、高炉セ
メントやフライアッシ、１セメント等の混合セメント、
アルミナセメント等が使用され、その配合量は１１当た
り２００〜４５０ｋｇが好ましい。Examples of cement include ordinary Portland cement, blast furnace cement, fly ash, mixed cement such as 1 cement,
Alumina cement or the like is used, and the blending amount thereof is preferably 200 to 450 kg per 11 parts.
２００ｋｇより少ないと製品重量コンクリートが弱強度
のものとなり、４５０に、を越えると製品の比重が低く
なって好ましくない。If it is less than 200 kg, the product weight concrete will have weak strength, and if it exceeds 450, the specific gravity of the product will be undesirably low.
本発明においては、炭素繊維を加えるが、これは繊維長
が１〜１０ＩＩＩＩ程度のものがよく、良品の長炭素繊
維製造時に副産する廃品であってもよい。In the present invention, carbon fibers are added, but these preferably have a fiber length of about 1 to 10III, and may be waste products that are by-products during the production of non-defective long carbon fibers.
長繊維は、セメントペーストと骨材等との混和が均質（
ヒできないため好ましくなく、１〜１０論−のものが均
質混和が達成できるので好ましい。Long fibers can be homogeneously mixed with cement paste, aggregate, etc.
It is not preferable because it cannot be mixed, but it is preferable to use a 1 to 10 theory because homogeneous mixing can be achieved.
炭素繊維は、直径８ｕｍ前後、引張強度５．０００ｋｇ
／ａｍ２以上もあり、スチール＃Ｊ＆維よりも強く、補
強効果が大きい、また、耐熱性が極めて良く、セメント
との結合性も良い。Carbon fiber has a diameter of around 8um and a tensile strength of 5.000kg.
/am2 or more, it is stronger than steel #J&fiber, has a greater reinforcing effect, has extremely good heat resistance, and has good bonding properties with cement.
なお、炭素繊維としては、特にピッチ系のものが好まし
い。Note that pitch-based carbon fibers are particularly preferred as carbon fibers.
一般に、コンクリートは圧縮強度が極めて高いものであ
るが、引張、曲げには弱い。Generally, concrete has extremely high compressive strength, but is weak in tension and bending.
そこで本発明では、炭素繊維を加配することによって引
張、曲げ強度を高めようとするものであるが、これは更
に次のように働くものである。Therefore, the present invention attempts to increase the tensile and bending strength by adding carbon fiber, and this works as follows.
すなわち、炭素繊維は、高比重骨材とセメントペースト
との間にそれらの移動を妨げるごとくジャングルジム状
に介在して、それらの比重差による沈降分離を十分に阻
止する結果、均質な高強度の重量コンクリートの提供を
可能とするものである。In other words, the carbon fibers are interposed between the high-density aggregate and the cement paste like a jungle gym to prevent their movement, sufficiently preventing sedimentation and separation due to the difference in their specific gravity, resulting in a homogeneous, high-strength structure. This makes it possible to provide heavy-duty concrete.
この添加量は、０．０５〜１重１％が好ましく、炭素繊
維セメント比、すなわちセメント重量に対する炭素繊維
の重量の割合は、１．０〜１０％が好ましい。The amount added is preferably 0.05 to 1% by weight, and the carbon fiber cement ratio, that is, the ratio of the weight of carbon fiber to the weight of cement, is preferably 1.0 to 10%.
１．０％より少ないと重量コンクリ−１−の施工時に骨
材とセメントペーストとの沈降分離現象が生じ易くなり
、かつ製品重量コンクリートの機械的強度も十分でなく
、１０％を越えると施工時のワーカビリティが悪くなり
、かつ不経済なものとなる。If it is less than 1.0%, sedimentation and separation phenomenon between aggregate and cement paste will easily occur during the construction of heavy concrete, and the mechanical strength of the product will not be sufficient. The workability of the workers becomes poor and it becomes uneconomical.
本発明においてはさらに有機ポリマーディスパージョン
をも加えるが、これは水中に０．０５〜１１ｔｍ程度の
有機ポリマーの微粒子が分散しているものく固形分濃度
：５０％前後）であり、有機ポリマーディスパージョン
としては、スチレン・ブタジェンラテックス（ＳＢＲ）
、その変性物（例えば、スチレンブタジェンをアクリル
にて変性したもののラテックス）、アクリルニトリル・
ブタジエンラテンクス（ＮＢＲ）、アクリルニトリル・
ブタジェン・スチレンラテックスのほか、メチル、メタ
クリレート・ブタジェンラテックス＜ＭＢＲ）、ポリク
ロロプレンラテックス、エチレン・プロピレンラテック
ス等のラテックス類、その他ポリアクリル酸エステル、
ポリ酢酸ビニル、塩化ビニル等のエマルジョン類が挙げ
られる。In the present invention, an organic polymer dispersion is also added, but this is a solid content concentration of about 50%) in which organic polymer fine particles of about 0.05 to 11 tm are dispersed in water. For John, styrene-butadiene latex (SBR)
, its modified products (e.g. latex of styrene-butadiene modified with acrylic), acrylonitrile,
Butadiene latinx (NBR), acrylonitrile,
In addition to butadiene/styrene latex, latexes such as methyl, methacrylate/butadiene latex (MBR), polychloroprene latex, ethylene/propylene latex, and other polyacrylic esters,
Examples include emulsions such as polyvinyl acetate and vinyl chloride.
この有機ポリマーデイスパージョンの添加は、ポリマー
微粒子のボールベアリング的作用により細骨材等の動き
を良好にするため、単位水量が削減されブリージング抵
抗性が増すばかりでなく、高比重骨材とセメントペース
トとの比重差による分離を阻止する役割を果たす、さら
に、製品重量コンクリートの耐水性、凍結融解抵抗性、
機械的強度を高める。The addition of this organic polymer dispersion improves the movement of fine aggregate, etc. due to the ball bearing action of the polymer particles, which not only reduces the unit water volume and increases breathing resistance, but also improves the movement of fine aggregate, etc. It plays a role in preventing separation due to the difference in specific gravity from the paste, and also improves the water resistance, freeze-thaw resistance, and
Increase mechanical strength.
この添加量は、固形分として０．０５〜３重量り６が好
ましく、ポリマー／セメント比、すなわちセメント重量
に対する有機ポリマー固形分の重量の割合（Ｐ／Ｃ（％
））は、２〜２０％が好ましい。The amount added is preferably 0.05 to 3% by weight as a solid content, and the polymer/cement ratio, that is, the ratio of the weight of the organic polymer solids to the cement weight (P/C (%
)) is preferably 2 to 20%.
２％より少ないと製品重量コンクリートの凍結融解抵抗
性（耐久性）が低下し、２０％を越えると施工時のワー
カビリティが悪くなり、かつ不経済なものとなる。If it is less than 2%, the freeze-thaw resistance (durability) of the product weight concrete will decrease, and if it exceeds 20%, workability during construction will be poor and it will be uneconomical.
ただし以上において、炭素繊維と有機ポリマーディスパ
ージョンの総量は４重量％を越えないことが好ましい。However, in the above, it is preferable that the total amount of carbon fiber and organic polymer dispersion does not exceed 4% by weight.
４重量？６を越えると、施工時のワーカビリティや経済
性の点で好ましくない。4 weight? If it exceeds 6, it is unfavorable in terms of workability and economic efficiency during construction.
以上のように本発明では、特に炭素繊維と有機ポリマー
ディスパージョンの双方を加配することにより、両者の
長所と十分に発揮させて、骨材とセメントペーストとの
分離阻止、製品強度の増強、凍結融解抵抗性の向上等を
図ったものである。As described above, in the present invention, by particularly adding both carbon fiber and organic polymer dispersion, the advantages of both can be fully exhibited, preventing the separation of aggregate and cement paste, increasing product strength, and freezing. This is intended to improve melting resistance.
なお、一般の重量コンクリートの製造におけると同様に
、その他周知の混和剤を添加することを妨げるものでは
ない。Note that, as in the production of general heavy-duty concrete, other well-known admixtures may be added.
（実施例） 本発明を実施例によって、具体的に説明する。(Example) The present invention will be specifically explained using examples.
以下に示す材料を本例重量コンクリートの製造用に使用
した。The materials listed below were used for the production of heavy concrete in this example.
「粗骨材」
南アフリカ産の赤鉄鉱：平均粒径２５＋＊ａｉ、比重４
．８６、スリへり減量１４．７％、粗粒率７〔細骨材ｊ
ニュージランド産の砂鉄（ｌｉｆｔ鉄鉱）・平均粒径０
１５ｎ糟、比重４．５４
「セメント」
許通ポルトランドセメント：比重３．１６「炭素繊維」
比重１６、直径１０ｐｍ、繊維長６彌１、引張強度 １
０，０００ｋｇ／ｃｍ２
前躯体：ビッチ。"Coarse aggregate" Hematite from South Africa: average particle size 25+*ai, specific gravity 4
．． 86, Slipping weight loss 14.7%, Coarse grain ratio 7 [Fine aggregate j Iron sand (lift iron ore) from New Zealand, average grain size 0
15n cement, specific gravity 4.54 ``cement'' Xu Tong Portland cement: specific gravity 3.16 ``carbon fiber'' specific gravity 16, diameter 10pm, fiber length 6cm 1, tensile strength 1
0,000kg/cm2 Forebody: Bitch.
「有機ポリマーディスパージョン」
゛″クロスレンＣＭＸ−０２（武田製薬玉業（株）製
スチレン・ブタジェンラテックス）：外ｉ−乳白濁色、
固形分４５〜４６％、粘度５０ＣＰＳ（２５°Ｃ）以下
、
「練り混ぜ用水」
上水道水
「混和剤」
°″Ｔｏ−２０”（竹本油脂話製、含窒素型スルホン酸
塩の高性能減水剤）
以上の原材料を第１表に示す割きで配合して供試体Δ及
び］〕とし、可傾式ミキサーを用いて、３分間撹拌した
後型枠に流し込み、脱型した後、そのまま湿空ないし気
中にて養生、あるいは水中にて養生を行った。"Organic polymer dispersion" Crossrene CMX-02 (manufactured by Takeda Pharmaceutical Co., Ltd.)
Styrene/butadiene latex): Outer i-milky color,
Solid content 45-46%, viscosity 50CPS (25°C) or less, "Water for mixing" Tap water "Admixture"°"To-20" (Manufactured by Takemoto Yushiwa, high performance water reducing agent of nitrogen-containing sulfonate) ) The above raw materials were mixed in the proportions shown in Table 1 to make the specimens Δ and ]]. After stirring for 3 minutes using a tilting mixer, the samples were poured into a mold, removed from the mold, and left in a damp air or exposed to air. Curing was performed in air or in water.
なお、比較のため炭素ｍ維及び有機ポリマーディスパー
ジョンを加配しない配合物を供試体Ｃとし、同様の処理
を施した。For comparison, a mixture containing no carbon fibers or organic polymer dispersion was designated as Specimen C, and was subjected to the same treatment.
その結果、第１表に示すごとく、本発明実施例の供試体
Ａ及びＢは、単位水量が少なくてもスランプ値が十分で
かつ骨材とセメントペーストとの分離が殆どなく、施工
性も良いものであった。As a result, as shown in Table 1, specimens A and B of the present invention examples had sufficient slump values even with a small unit water volume, almost no separation between aggregate and cement paste, and good workability. It was something.
また製品重量コンクリートは、圧縮強度等の機械的強度
も高く、耐摩耗性にも優れ、緻密質で透水性、通気性も
低く、耐海水性も改善されたものであった。さらに、凍
結融解試験による相対弾性係数の低減も少なく、耐久性
の良いものであった。In addition, the product weight concrete had high mechanical strength such as compressive strength, excellent wear resistance, was dense, had low water permeability and air permeability, and had improved seawater resistance. Furthermore, the relative elastic modulus decreased little in the freeze-thaw test, and the durability was good.
第
表
なお、耐摩耗試験は、スパイク式簡易ラベリング試験（
ＤＢ型）により行った。In addition, the wear resistance test is based on the spike type simple labeling test (
DB type).
試験供試体は１２時間以上養生したもので、１０ｃＩＩ
Ｉφ、厚さ４〜６ＱＩ勇のものを使用し、スパイク回転
速度＝９０凹／分、テーブル回転速度＝５回／分、軸荷
重： ２５ｋｇ、試験回転数： １０００回、供試体表
面：湿潤状態、の条件下で行った。The test specimens were cured for more than 12 hours and had a 10cII
Iφ, thickness 4 to 6QI is used, spike rotation speed = 90 depressions/min, table rotation speed = 5 times/min, shaft load: 25 kg, test rotation speed: 1000 times, specimen surface: wet state It was carried out under the following conditions.
本発明において炭素繊維及び有機ポリマーディスパージ
ョンを加配することの有意義性は、■単位水量を滅する
ことができ、しかも骨材とセメントペーストの分離が阻
止され、ブリージング抵抗性を増すこと、■有機ポリマ
ーディスパージョンのポリマーの微粒子がセメントの水
和反応の進行や乾燥により固形の膜状ポリマーに変化し
、セメント粒子や砂鉄を肢覆し、耐久性（凍結融解抵抗
性）の優れた重量コンクリートが得られること、さらに
加えて■炭素繊維がジャングルジム状に介在して、高比
重骨材とセメントペーストとの比重差による分離を阻止
し、また製品重量コンクリートの特に引張強度を高める
こと、である。The significance of adding carbon fiber and organic polymer dispersion in the present invention is that: 1) the unit water amount can be reduced, and separation of aggregate and cement paste is prevented, increasing breathing resistance; 2) organic polymer The fine particles of the polymer in the dispersion change into a solid film-like polymer as the cement hydrates and dries, overturning the cement particles and iron sand, resulting in heavy concrete with excellent durability (freeze-thaw resistance). In addition, carbon fibers are interposed in a jungle gym shape to prevent separation due to the difference in specific gravity between the high-density aggregate and cement paste, and to increase the tensile strength of the concrete product.
本発明により得られた重量コンクリートは、比重が３６
〜４０と非常に高く、かつ機械的強度が潰れているため
、砕波田撃を受ける海洋横遺物、例えば消波ブロック（
離岸堤）、防波堤の防護層、岸壁、魚礁等に好適に使用
される。The heavy concrete obtained by the present invention has a specific gravity of 36
~ 40, which is very high and has lost its mechanical strength, so it is not suitable for horizontal marine relics, such as wave-dissipating blocks (
Suitable for use in offshore breakwaters), breakwater protective layers, quay walls, fish reefs, etc.
（発明の効果）
以上に説明したとおり、本発明によれば、施工等に、高
比重骨材とセメントペーストとの比重差による分離現象
が生じなく、均質な高比重の重置コンクリートが提（共
できる。(Effects of the Invention) As explained above, according to the present invention, the separation phenomenon due to the difference in specific gravity between high specific gravity aggregate and cement paste does not occur during construction, etc., and homogeneous high specific gravity layered concrete can be produced. We can share it.
また、特に凍結融解抵抗性に優れ、引張強度等の機械的
強度も高い１鼠コンクリートが得られるため、特に海洋
構造物用として有用なものである。In addition, it is possible to obtain single-layer concrete that has particularly excellent freeze-thaw resistance and high mechanical strength such as tensile strength, so it is particularly useful for marine structures.
Claims (7)
総量７０〜９０重量％、水／セメント比０．３〜０．７
のセメントペースト８〜３０重量％、繊維長１〜１０ｍ
ｍの炭素繊維０．０５〜１重量％及び及び有機ポリマー
ディスパージョン０．０５〜３重量％（ただし、固形分
として）からなり、かつ前記有機ポリマー／セメント比
が２〜２０％であり、炭素繊維と有機ポリマーディスパ
ージョンの総量が４重量％を越えないことを特徴とする
重量コンクリート製造用配合物。(1) Total amount of iron ore as coarse aggregate and iron sand as fine aggregate 70-90% by weight, water/cement ratio 0.3-0.7
cement paste 8-30% by weight, fiber length 1-10m
0.05 to 1% by weight of carbon fiber and 0.05 to 3% by weight (as solid content) of organic polymer dispersion, and the organic polymer/cement ratio is 2 to 20%, and carbon A formulation for the production of heavy concrete, characterized in that the total amount of fibers and organic polymer dispersion does not exceed 4% by weight.
総量７０〜９０重量％、水／セメント比０．３〜０．７
のセメントペースト８〜３０重量％、繊維長１〜１０ｍ
ｍの炭素繊維０．０５〜１重量％及び有機ポリマーディ
スパージョンからなり、かつ有機ポリマーディスパージ
ョン０．０５〜３重量％（ただし、固形分として）から
なり、かつ前記有機ポリマー／セメント比が２〜２０％
であり、炭素繊維と有機ポリマーディスパージョンの総
量が４重量％を越えない配合物を型枠内に入れ養生硬化
せしめることを特徴とする重量コンクリートの製造法。(2) Total amount of iron ore as coarse aggregate and iron sand as fine aggregate 70-90% by weight, water/cement ratio 0.3-0.7
cement paste 8-30% by weight, fiber length 1-10m
m of carbon fibers of 0.05 to 1% by weight and an organic polymer dispersion, and 0.05 to 3% by weight of the organic polymer dispersion (as solid content), and the organic polymer/cement ratio is 2. ~20%
A method for producing heavy-duty concrete, characterized in that a mixture in which the total amount of carbon fibers and organic polymer dispersion does not exceed 4% by weight is placed in a mold and allowed to cure and harden.
ることを特徴とする請求項２記載の重量コンクリートの
製造法。(3) The method for producing heavy duty concrete according to claim 2, characterized in that the fine aggregate ratio is 0.3 to 0.5.
徴とする請求項２又は３記載の重量コンクリートの製造
法。(4) The method for producing heavy-duty concrete according to claim 2 or 3, wherein the cement is Portland cement.
ジエンラテックスであることを特徴とする請求項２ない
し４のいずれかに記載の重量コンクリートの製造法。(5) The method for producing heavy duty concrete according to any one of claims 2 to 4, wherein the organic polymer dispersion is styrene-butadiene latex.
ルブタジエンラテックスであることを特徴とする請求項
２ないし４のいずれかに記載の重量コンクリートの製造
法。(6) The method for producing heavy duty concrete according to any one of claims 2 to 4, wherein the organic polymer dispersion is acrylonitrile butadiene latex.
いし６０重量％であることを特徴とする請求項２ないし
６のいずれかに記載の重量コンクリートの製造法。(7) The method for producing heavy duty concrete according to any one of claims 2 to 6, characterized in that the solid content of the organic polymer dispersion is 25 to 60% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33457188A JP2610980B2 (en) | 1987-12-30 | 1988-12-29 | Compounds for the production of heavy concrete and methods for producing heavy concrete |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33399887 | 1987-12-30 | ||
| JP62-333998 | 1987-12-30 | ||
| JP33457188A JP2610980B2 (en) | 1987-12-30 | 1988-12-29 | Compounds for the production of heavy concrete and methods for producing heavy concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02124753A true JPH02124753A (en) | 1990-05-14 |
| JP2610980B2 JP2610980B2 (en) | 1997-05-14 |
Family
ID=26574697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33457188A Expired - Fee Related JP2610980B2 (en) | 1987-12-30 | 1988-12-29 | Compounds for the production of heavy concrete and methods for producing heavy concrete |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2610980B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04219354A (en) * | 1990-11-13 | 1992-08-10 | Kazuji Fukunaga | Hardening of mortar and concrete |
| WO1999058468A1 (en) * | 1998-05-14 | 1999-11-18 | Bouygues | Concrete comprising organic fibres dispersed in a cement matrix, concrete cement matrix and premixes |
| US6090329A (en) * | 1995-09-07 | 2000-07-18 | Braas Gmbh | Method of producing colored concrete bodies such as colored concrete roofing tiles |
| US7067001B2 (en) * | 2002-04-22 | 2006-06-27 | Christopher George Fraser | Drainage composition and uses thereof |
| WO2021112684A1 (en) * | 2019-12-02 | 2021-06-10 | Restone As | Use of a cementitious mixture comprising divalent magnesium-iron silicate for making concrete structures with reduced permeability and method for making such a structure |
-
1988
- 1988-12-29 JP JP33457188A patent/JP2610980B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04219354A (en) * | 1990-11-13 | 1992-08-10 | Kazuji Fukunaga | Hardening of mortar and concrete |
| US6090329A (en) * | 1995-09-07 | 2000-07-18 | Braas Gmbh | Method of producing colored concrete bodies such as colored concrete roofing tiles |
| US6268410B1 (en) | 1995-09-07 | 2001-07-31 | Laferge Braas Gmbh | Colored concrete roofing tiles and a method for producing colored concrete bodies such as colored concrete roofing tiles |
| WO1999058468A1 (en) * | 1998-05-14 | 1999-11-18 | Bouygues | Concrete comprising organic fibres dispersed in a cement matrix, concrete cement matrix and premixes |
| FR2778654A1 (en) * | 1998-05-14 | 1999-11-19 | Bouygues Sa | Concrete comprising organic fibers in cement matrix |
| US7067001B2 (en) * | 2002-04-22 | 2006-06-27 | Christopher George Fraser | Drainage composition and uses thereof |
| WO2021112684A1 (en) * | 2019-12-02 | 2021-06-10 | Restone As | Use of a cementitious mixture comprising divalent magnesium-iron silicate for making concrete structures with reduced permeability and method for making such a structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2610980B2 (en) | 1997-05-14 |
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