JP2530863B2 - High strength cement composition - Google Patents
High strength cement compositionInfo
- Publication number
- JP2530863B2 JP2530863B2 JP62216510A JP21651087A JP2530863B2 JP 2530863 B2 JP2530863 B2 JP 2530863B2 JP 62216510 A JP62216510 A JP 62216510A JP 21651087 A JP21651087 A JP 21651087A JP 2530863 B2 JP2530863 B2 JP 2530863B2
- Authority
- JP
- Japan
- Prior art keywords
- substance
- weight
- parts
- cement composition
- rapid hardening
- 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.)
- Expired - Fee Related
Links
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、セメント質物質、平均粒径がセメント質物
質よりも少なくとも１オーダー低い超微粉、高性能減水
剤、Al含有急硬性物質、及び凝結調節剤からなる高強度
セメント組成物に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a cementitious substance, ultrafine powder having an average particle size at least one order lower than that of the cementitious substance, a high-performance water reducing agent, an Al-containing rapid hardening substance, and The present invention relates to a high-strength cement composition containing a setting regulator.
セメント質物質、超微粉、高性能減水剤を組み合わせ
ることにより、非常に少ない水セメント比で流動性を確
保することが可能な組成物が知られている。これら組成
物に急硬性を持たせることは、実用上非常に重要なこと
であるが、練り混ぜる水量が少ないために、特殊な練り
混ぜ方法によらないと十分な可使時間を得ることが不可
能であつた（特開昭61-186255号公報）。それ故、急硬
性を有し高強度を示す実用上使用可能なセメント組成物
は見い出せておらず、使用し易い急硬性を有する高強度
セメント組成物の出現が切望されていた。There is known a composition capable of ensuring fluidity with a very low water-cement ratio by combining a cementitious substance, ultrafine powder and a high-performance water reducing agent. It is very important in practice to give these compositions quick-hardening properties, but since the amount of water to be kneaded is small, it is impossible to obtain sufficient pot life unless a special kneading method is used. It was possible (Japanese Patent Laid-Open No. 61-186255). Therefore, a practically usable cement composition having rapid hardening and high strength has not been found, and the advent of a high strength cement composition having rapid hardening that is easy to use has been earnestly desired.
本発明者らはこれらの問題点を解決すべく種々検討の
結果、セメント質物質、超微粉、高性能減水剤に所定の
物質を併用することにより、特別な混練方法を必要とせ
ず十分な可使時間がとれ、急硬性を示し、かつ、高強度
を得ることが出来るセメント組成物が得られることを見
い出し本発明を完成するに至つた。As a result of various studies to solve these problems, the present inventors used cementitious substances, ultrafine powders, and high-performance water-reducing agents in combination with a predetermined substance, which does not require a special kneading method and is sufficient. The inventors have found that a cement composition that can be used for a long time, exhibits rapid hardening, and high strength can be obtained, and has completed the present invention.
即ち、本発明は、セメント質物質、平均粒径がセメン
ト質物質よりも少なくとも１オーダー低い超微粉、高性
能減水剤、Al含有急硬性物質、及び凝結調節剤からな
り、しかも、該Al含有急硬性物質が、セメント質物質と
超微粉の合計100重量部に対して、10重量部未満である
ことを特徴とする高強度セメント組成物である。That is, the present invention comprises a cementitious substance, ultrafine powder having an average particle size at least one order lower than that of the cementitious substance, a high-performance water reducing agent, an Al-containing rapid hardening substance, and a setting regulator. The high-strength cement composition is characterized in that the hard substance is less than 10 parts by weight with respect to a total of 100 parts by weight of the cementitious substance and the ultrafine powder.
以下、本発明を詳細に説明する。 Hereinafter, the present invention will be described in detail.
セメント質物質とは、普通、早強、超早強および白色
等の各種ポルトランドセメントが通常使用でき、その他
のセメントも使用できる。As the cementitious substance, various portland cements such as normal, early-hardening, ultra-early-hardening and white can be usually used, and other cements can also be used.
超微粉は、平均粒径がセメント質物質（通常10〜20μ
ｍ程度）よりも少なくとも１オーダー低いものであり、
特に平均粒径が２オーダー程度低いものが望ましい。超
微粉としてはシリコン、含シリコン合金ならびにジルコ
ニアを製造する際に副製するシリカダスト（シリカヒュ
ーム）やシリカ質ダストが好適であり、炭酸カルシウ
ム、シリカゲル、オパール質硅石、酸化チタン、酸化ア
ルミニウムなども使用出来る。このような超微粉の製造
は、シリカダストのように気相で生成する以外に、分級
器と粉砕機を組み合せて粉砕する方法もある。また、粉
砕工程でバグフイルターにより回収したものは、より粒
径の細かいものを得ることができる。The ultrafine powder has an average particle size of a cementitious substance (usually 10 to 20 μm).
at least one order lower than
In particular, it is desirable that the average particle size is about 2 orders of magnitude lower. As the ultrafine powder, silica dust (silica fume) and siliceous dust produced as a by-product when producing silicon, silicon-containing alloys and zirconia are suitable, and calcium carbonate, silica gel, opalaceous silica, titanium oxide, aluminum oxide, etc. are also suitable. Can be used. Such ultrafine powder can be produced by a method in which a classifier and a pulverizer are combined and pulverized, in addition to the production in the gas phase like silica dust. In addition, the particles recovered by the bag filter in the pulverizing step can have a finer particle size.
超微粉の使用量は、セメント質物質60〜95重量部に対
して５〜40重量部、好ましくはセメント質物質65〜90重
量部に対して10〜35重量部である。５重量部未満では高
強度（堅牢性）を得ることが困難であり、また、40重量
部を超えると混練物の流動性が著しく低下し、成型する
ことが困難となり、かつ、強度発現も不十分となる。The amount of ultrafine powder used is 5 to 40 parts by weight with respect to 60 to 95 parts by weight of cementitious material, and preferably 10 to 35 parts by weight with respect to 65 to 90 parts by weight of cementitious material. If it is less than 5 parts by weight, it is difficult to obtain high strength (fastness), and if it exceeds 40 parts by weight, the fluidity of the kneaded product is remarkably reduced, making it difficult to mold, and the strength is not sufficiently expressed. Will be enough.
本発明で使用する高性能減水剤とは、セメントに多量
添加しても凝結の過遅延や過度の空気連行を伴なわない
分散能力の大きな界面活性剤であつて、ナフタリンスル
ホン酸塩、メラミン樹脂スルホン酸塩およびポリカルボ
ン酸塩などを主成分とするものがあげられる。高性能減
水剤は、混練物を低水セメント比で得るために必要なも
のであり、従来の使用量はセメントに対し固形分換算で
0.3〜１重量％が使用されているが、本発明においては
それよりも多量に使用することが望ましい。具体的に
は、セメント質物質と超微粉との混合物（以下粉体と云
う）100重量部に対し固形分換算で10重量部程度まで使
用され、それよりも多量に使用すると硬化反応にかえつ
て悪影響を与える。特に好ましい使用量は１〜５重量部
である。The high-performance water-reducing agent used in the present invention is a surfactant having a large dispersing ability without causing excessive delay of setting or excessive air entrainment even when added in a large amount to cement, naphthalene sulfonate, and melamine resin. Examples thereof include those containing sulfonate and polycarboxylate as main components. The high-performance water reducing agent is necessary to obtain a kneaded product with a low water cement ratio, and the conventional amount used is the solid content of cement.
Although 0.3 to 1% by weight is used, it is preferable to use a larger amount in the present invention. Specifically, it is used up to about 10 parts by weight in terms of solid content with respect to 100 parts by weight of a mixture of cementitious substance and ultrafine powder (hereinafter referred to as powder). If it is used in a larger amount, it causes a curing reaction. Have an adverse effect. A particularly preferred amount of use is 1 to 5 parts by weight.
Al含有急硬性物質（以下急硬性物質という）として
は、カルシウムアルミネートやカルシウムアルミネート
固溶体や、これらとセッコウとを主成分とするもの、水
酸化アルミニウムや、これとセッコウとを主成分とする
もの、硫酸アルミニウムや、これと水酸化カルシウムと
を主成分とするもの、並びに、仮焼明ばん石を主成分と
するもの等が挙げれ、それぞれを適宜混合したものも使
用できる。Examples of the Al-containing rapid hardening substance (hereinafter referred to as rapid hardening substance) include calcium aluminate and calcium aluminate solid solution, those containing gypsum and gypsum as the main components, aluminum hydroxide and those containing gypsum as the main component. Examples thereof include aluminum sulfate, those containing aluminum sulfate, calcium hydroxide and calcium hydroxide as main components, and those containing calcined albite as main components, and those in which they are appropriately mixed can also be used.
ここで、カルシウムアルミネートやカルシウムアルミ
ネート固溶体としては、例えば、CaO・Al2O3、12CaO・7
Al2O3、3CaO・Al2O3、及びCaO・Al2O3−CaO・2Al2O3等
のカルシウムアルミネートやカルシウムアルミネート固
溶体をいい、結晶質、非晶質いずれも使用可能であり、
また、その混合物も使用可能である。Here, as the calcium aluminate or the calcium aluminate solid solution, for example, CaO.Al 2 O 3 , 12CaO.7.
Al 2 O 3 , 3CaO ・ Al 2 O 3 , and CaO ・ Al 2 O 3 -CaO ・ 2Al 2 O 3 etc. are calcium aluminate and calcium aluminate solid solution, which can be crystalline or amorphous. Yes,
Moreover, the mixture can also be used.
急硬性物質の使用量は、粉体100重量部に対し10重量
部未満、好ましくは５重量部以下である。10重量部以上
では可使時間の調節に特別の混練方法等が必要となる。The amount of the rapid hardening substance used is less than 10 parts by weight, preferably 5 parts by weight or less, based on 100 parts by weight of the powder. If it is 10 parts by weight or more, a special kneading method or the like is required to adjust the pot life.
凝結調節剤としては、急硬性物質による可使時間を調
節するもので、通常遅延剤として利用しているものを用
いることが出来るが、特に、ホウ酸およびオキカルボン
酸のうち１種類または２種以上が使用できる。具体的に
は、ホウ酸、クエン酸、酒石酸、グルコン酸等またそれ
らの塩等が使用できる。As the setting regulator, one which controls the pot life of the rapid hardening substance and which is usually used as a retarder can be used. Particularly, one or more of boric acid and oxycarboxylic acid are used. Can be used. Specifically, boric acid, citric acid, tartaric acid, gluconic acid and the like, and salts thereof can be used.
凝結調節剤の使用量は使用する材料により一概には言
えないが、粉体と急硬性物質の合計量に対し10重量％以
下、好ましくは５重量％以下程度である。それ以上の使
用は硬化反応に悪影響を与える。The amount of the coagulation modifier used cannot be generally determined depending on the materials used, but is 10% by weight or less, preferably 5% by weight or less based on the total amount of the powder and the rapid hardening substance. Further use adversely affects the curing reaction.
さらに必要に応じ、上記材料の他に骨材を併用するこ
とが出来る。骨材は、一般の砂、砂利でも可能である
が、モース硬度６以上またはヌープ圧子硬度700Kgf/mm2
以上の基準で選定された硬質骨材を使用すれば、強度お
よび弾性率の向上に極めて有効である。硬質骨材として
は、硅石、黄鉄鉱、赤鉄鉱、磁鉄鉱、黄玉、ローソン
石、コランダム、フエナサイト、スピネル、緑柱石、金
緑石、電気石、花こう岩、十字石、ジルコン、焼成ボー
キサイト、炭化ほう素、フエロクロムスラグなどがあ
る。また、鉄、ステンレス等の金属粉の使用も有効であ
る。Furthermore, if necessary, an aggregate may be used in combination with the above materials. Aggregate can be ordinary sand or gravel, but Mohs hardness of 6 or more or Knoop indenter hardness of 700 Kgf / mm 2
The use of the hard aggregate selected based on the above criteria is extremely effective in improving strength and elastic modulus. Examples of hard aggregates include silica, pyrite, hematite, magnetite, yellow jade, lawsonite, corundum, fenasite, spinel, beryl, vermiculite, tourmaline, granite, lithite, zircon, calcined bauxite, carbite. There are plain and ferrochrome slag. It is also effective to use metal powder such as iron and stainless steel.
さらに、各種繊維や鉄筋その他の補強材を組み合せて
使用することも出来る。Further, various fibers, reinforcing bars and other reinforcing materials can be used in combination.
以上の材料に水を加えて混練物を得る。 Water is added to the above materials to obtain a kneaded product.
水の使用量は、粉体と急硬性物質の合計量100重量部
に対して13〜35重量部であり、好ましくは15〜25重量部
である。The amount of water used is 13 to 35 parts by weight, preferably 15 to 25 parts by weight, based on 100 parts by weight of the total amount of the powder and the rapid hardening substance.
混練方法は特に限定されるものではなく、十分に混練
できればよい。例えばモルタルミキサー、コンクリート
ミキサー、ハンドミキサー、オムニミキサー等が使用出
来る。The kneading method is not particularly limited as long as it can be sufficiently kneaded. For example, a mortar mixer, a concrete mixer, a hand mixer, an omni mixer, etc. can be used.
以下、実施例により本発明を更に詳しく説明する。 Hereinafter, the present invention will be described in more detail with reference to examples.
実施例１ 表−１実験No1〜14に示す配合で実験を行ない、練り
上り後、可使時間、圧縮強度（3H,1D,28D養生）を測定
した。結果を表−１に併記する。混練方法は材料を一括
投入し空練りした後、凝結調節剤を溶解した混練水を加
えて混練した。混練は20℃、RH80％で行ない型枠に打設
した。養生は、材令1Dまで20℃、RH80％、その後材令28
Dまで水中養生とした。Example 1 Experiments were conducted with the formulations shown in Table 1 Experiment Nos. 1 to 14, and after kneading, the pot life and compressive strength (3H, 1D, 28D curing) were measured. The results are also shown in Table-1. As for the kneading method, after the materials were all put in and kneaded in air, kneading water in which the setting regulator was dissolved was added and kneading. The kneading was carried out at 20 ° C and 80% RH, and it was placed in the mold. Curing up to age 1D at 20 ℃, RH80%, then age 28
Underwater curing was performed up to D.
比較例１ 表−１実験No15および16の配合を用いたこと以外は実
施例１と同様に行なつた。結果を表−１に併記する。Comparative Example 1 The procedure of Example 1 was repeated except that the formulations of Table 1 Experiment Nos. 15 and 16 were used. The results are also shown in Table-1.
実施例２ 表−２実験No17〜19に示す配合で実験を行ない、可使
時間、圧縮強度（3H,18H,28D養生）を測定したこと以外
は実施例１と同様に行なつた。結果を表−２に併記す
る。 Example 2 Experiments were conducted in the same manner as in Example 1 except that experiments were conducted with the formulations shown in Table 2 Experiment Nos. 17 to 19 and pot life and compressive strength (3H, 18H, 28D curing) were measured. The results are also shown in Table-2.
比較例２ 表−２実験No20〜23の配合を用いたこと以外は実施例
２と同様に行なつた。結果を表−２に併記する。Comparative Example 2 The procedure of Example 2 was repeated except that the formulations of Table 2 Experiment Nos. 20 to 23 were used. The results are also shown in Table-2.
使用材料 セメント ：アンデスセメント（株）、普通ボルトラ
ンドセメント 超微粉 ：シリカヒユーム（フエロシリコン製造時
のシリカダスト、平均粒径0.1μｍ） 高性能減水剤：電気化学工業（株）、商品名「FT-500」
（固形分換算で使用）主成分、β−ナフタレンスルホン
酸高縮合物塩 急硬性物質A:電気化学工業（株）、商品名「デンカコス
ミツク」、主成分、カルシウムアルミネートとセツコウ 〃 B:硫酸アルミニウム、市販品 〃 C:水酸化アルミニウム＋II型無水セツコウ
（重量比50/50混合品） 〃 D:4 CaO・Al2O3・Fe2O3 細骨材 ：硅石（最大粒径5mm） 凝結調節剤E:ホウ酸（試薬１級） 〃 F:酒石酸（試薬１級） 水 ：水道水 〔発明の効果〕 実施例１および実施例２より、本発明は極く初期材令
で作業に十分に必要な強度を発現し、なおかつ、長期的
には1,000Kgf/cm2近く、あるいは、それ以上の超高強度
を発現するセメント硬化体を提供出来ることが判かり、
また、十分な可使時間がとれ、実際の作業の迅速化、効
率の改善、安全性の向上等が計れ、ひいては、工期の短
縮、経費の節減が出来るという効果がある。 Materials used: Cement: Andes Cement Co., Ltd., Ordinary Boltland Cement Ultrafine powder: Silica Hyume (silica dust during production of ferroesilicon, average particle size 0.1 μm) High performance water reducing agent: Denki Kagaku Kogyo Co., Ltd. -500 "
(Used in terms of solid content) Main component, β-naphthalene sulfonic acid highly condensed salt A rapid hardening substance A: Denki Kagaku Kogyo Co., Ltd., trade name "Denka Kosmitsu", main components, calcium aluminate and Setsukou 〃 B: Aluminum sulfate , Commercial product 〃 C: Aluminum hydroxide + II type anhydrous Setsukou (50/50 mixture by weight) 〃 D: 4 CaO ・ Al 2 O 3・ Fe 2 O 3 fine aggregate: Silica stone (maximum particle size 5 mm) Agent E: Boric acid (first-grade reagent) F: Tartaric acid (first-grade reagent) Water: Tap water [Effects of the Invention] From Example 1 and Example 2, the present invention shows that the present invention is very early and sufficient for work. It has been found that it is possible to provide a hardened cement body that develops the required strength, and in the long term, near 1,000 Kgf / cm 2 , or a super high strength of more than that,
Further, there is an effect that a sufficient pot life can be taken, actual work can be speeded up, efficiency can be improved, safety can be improved, and the work period can be shortened and cost can be reduced.
本発明の高強度セメント組成物は、各種グラウト、逆
打ちモルタルやコンクリート、道路の床版、橋梁、橋脚
などの補修、構造物の打継品や接合部、機械や鉄骨など
の基礎、鉄道などの道床や枕木、プラツトホーム、海洋
または水中構造物、耐摩耗や重量物運搬などの床、各種
建材、プレス機やその裏込め、タイルやボード類、美術
品などの母材、機械ベツドや定盤、摺動面やベアリング
などの滑り材、各種の型材料等幅広い用途が開けてい
る。The high-strength cement composition of the present invention includes various grouts, reverse mortar and concrete, road slabs, bridges, bridge pier repairs, structural joints and joints, foundations for machines and steel frames, railways, etc. Roadbeds, sleepers, platforms, marine or underwater structures, floors for abrasion-resistant and heavy-duty transportation, various building materials, presses and backfills, base materials for tiles, boards, works of art, machine beds and surface plates. Wide range of applications such as sliding materials such as sliding surfaces and bearings, and various mold materials.
Claims (1)
質よりも少なくとも１オーダー低い超微粉、高性能減水
剤、Al含有急硬性物質、及び凝結調節剤からなり、しか
も、該Al含有急硬性物質が、セメント質物質と超微粉の
合計100重量部に対して、10重量部未満であることを特
徴とする高強度セメント組成物。1. A cementitious substance, an ultrafine powder having an average particle size at least one order lower than that of the cementitious substance, a high-performance water-reducing agent, an Al-containing rapid hardening substance, and a setting regulator, and the Al-containing rapid hardening property. A high-strength cement composition, wherein the amount of the substance is less than 10 parts by weight based on 100 parts by weight of the total amount of the cementitious substance and the ultrafine powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62216510A JP2530863B2 (en) | 1987-09-01 | 1987-09-01 | High strength cement composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62216510A JP2530863B2 (en) | 1987-09-01 | 1987-09-01 | High strength cement composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6461339A JPS6461339A (en) | 1989-03-08 |
| JP2530863B2 true JP2530863B2 (en) | 1996-09-04 |
Family
ID=16689559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62216510A Expired - Fee Related JP2530863B2 (en) | 1987-09-01 | 1987-09-01 | High strength cement composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2530863B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9513116D0 (en) * | 1995-06-28 | 1995-08-30 | Sandoz Ltd | Improvements in or relating to organic compounds |
| FR2741616B1 (en) * | 1995-11-23 | 2000-03-10 | Sandoz Sa | CEMENT ACCELERATORS |
| JP2001213654A (en) * | 2000-01-31 | 2001-08-07 | Taiheiyo Cement Corp | Quick-setting mortar or concrete with ultra high strength |
| EP1422205A1 (en) | 2002-11-19 | 2004-05-26 | Sika Technology AG | Settting and hardening accelerator for hydraulic binders and process for its production |
| JP5160763B2 (en) * | 2006-10-13 | 2013-03-13 | 電気化学工業株式会社 | Cement mortar composition |
| JP6133598B2 (en) * | 2012-12-29 | 2017-05-24 | 太平洋マテリアル株式会社 | Fast-hardening grout composition and fast-hardening grout material |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5760124A (en) * | 1980-09-26 | 1982-04-10 | Ishida Sangyo Kk | Electric space heating apparatus |
-
1987
- 1987-09-01 JP JP62216510A patent/JP2530863B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6461339A (en) | 1989-03-08 |
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