JPS6311556A - Cement accelerator - Google Patents
Cement acceleratorInfo
- Publication number
- JPS6311556A JPS6311556A JP15545586A JP15545586A JPS6311556A JP S6311556 A JPS6311556 A JP S6311556A JP 15545586 A JP15545586 A JP 15545586A JP 15545586 A JP15545586 A JP 15545586A JP S6311556 A JPS6311556 A JP S6311556A
- Authority
- JP
- Japan
- Prior art keywords
- quick
- cement
- setting
- alkali
- setting agent
- 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 description 19
- 239000003795 chemical substances by application Substances 0.000 claims description 27
- 239000003513 alkali Substances 0.000 claims description 17
- 239000007864 aqueous solution Substances 0.000 claims description 7
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 6
- 150000004645 aluminates Chemical class 0.000 claims description 6
- XPPKVPWEQAFLFU-UHFFFAOYSA-J diphosphate(4-) Chemical class [O-]P([O-])(=O)OP([O-])([O-])=O XPPKVPWEQAFLFU-UHFFFAOYSA-J 0.000 claims description 4
- 239000007788 liquid Substances 0.000 description 15
- 238000002156 mixing Methods 0.000 description 6
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000003381 stabilizer Substances 0.000 description 4
- 239000011398 Portland cement Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910000027 potassium carbonate Inorganic materials 0.000 description 3
- 159000000001 potassium salts Chemical class 0.000 description 3
- KVOIJEARBNBHHP-UHFFFAOYSA-N potassium;oxido(oxo)alumane Chemical compound [K+].[O-][Al]=O KVOIJEARBNBHHP-UHFFFAOYSA-N 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000011378 shotcrete Substances 0.000 description 3
- RYCLIXPGLDDLTM-UHFFFAOYSA-J tetrapotassium;phosphonato phosphate Chemical compound [K+].[K+].[K+].[K+].[O-]P([O-])(=O)OP([O-])([O-])=O RYCLIXPGLDDLTM-UHFFFAOYSA-J 0.000 description 3
- KLZUFWVZNOTSEM-UHFFFAOYSA-K Aluminium flouride Chemical compound F[Al](F)F KLZUFWVZNOTSEM-UHFFFAOYSA-K 0.000 description 2
- 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 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 235000012208 gluconic acid Nutrition 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 159000000000 sodium salts Chemical class 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 235000002906 tartaric acid Nutrition 0.000 description 2
- 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
- RGHNJXZEOKUKBD-SQOUGZDYSA-N Gluconic acid Natural products OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- 239000011400 blast furnace cement Substances 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 235000011180 diphosphates Nutrition 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 239000000174 gluconic acid Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 1
- CHWRSCGUEQEHOH-UHFFFAOYSA-N potassium oxide Chemical compound [O-2].[K+].[K+] CHWRSCGUEQEHOH-UHFFFAOYSA-N 0.000 description 1
- 229910001950 potassium oxide Inorganic materials 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910001388 sodium aluminate Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明はセメント用急結剤に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to an quick setting agent for cement.
（従来の技術と問題点）
近年新しいトンネル工法であるナトム（ＮＡＴＭ）工法
が定着し、吹付コンクリート施工量が増加している。こ
の吹付コンクリートには、セメント用急結剤の添加が不
可欠であり、急結剤としてはアルミン酸アルカリ塩や炭
酸アルカリ塩等が知られている。例えばアルミン酸ソー
ダと炭酸ソーダとの粉末混合物を主成分とする粉末急結
剤や、アルミン酸カリウムと炭酸カリウムとの混合水溶
液を主成分とする液体急結剤等が市販されている。(Conventional technology and problems) In recent years, a new tunnel construction method, the NATM construction method, has become established, and the amount of shotcrete construction is increasing. It is essential to add a quick setting agent for cement to this shotcrete, and known quick setting agents include alkali aluminates and alkali carbonates. For example, a powder quick-setting agent whose main component is a powder mixture of sodium aluminate and soda carbonate, a liquid quick-set agent whose main component is a mixed aqueous solution of potassium aluminate and potassium carbonate, and the like are commercially available.
前者の場合、モルタルやコンクリートを吹付施工する際
、セメントと骨材との混合物に急結剤を混入し、それを
乾式吹付機で供給する一方、ノズル先端（ｑ近で別系の
圧送水と合流するまでは、粉流体の形で圧送されるので
粉塵が発生し作業環境を害したり、急結剤との混合が不
均一になったり、さらには骨材の含有水分とセメントと
急結剤が反応して光路を閉塞する恐れがおるので、材料
等の厳格な管理が必要である。後者の場合は液体なので
、上記のような欠点は免れるが、急結性能を更に高める
のに有効な添加物が望まれていた。In the former case, when spraying mortar or concrete, a quick-setting agent is mixed into the mixture of cement and aggregate, and while it is supplied by a dry sprayer, a separate system of pumped water and Until they are combined, they are pumped in the form of powder and fluid, which creates dust that harms the working environment, uneven mixing with the quick-setting agent, and even the moisture content of the aggregate, cement, and quick-setting agent. There is a risk that the material will react and block the optical path, so strict control of the material, etc. is required.In the latter case, since it is a liquid, it is free from the drawbacks mentioned above, but it is effective to further improve the quick setting performance. Additives were desired.
しかしながら、アルミン酸アルカリの水溶液は化学的に
不安定で貯蔵中に水酸化アルミニウムの結晶が析出しや
すく、これを防止するための安定剤としてグルコン酸又
はその塩や酒石酸又はその塩等の添加（ＵＳＰ ２，３
４５，１３４＠）が行われることが多い。However, aqueous solutions of alkali aluminates are chemically unstable and aluminum hydroxide crystals tend to precipitate during storage. To prevent this, gluconic acid or its salts, tartaric acid or its salts, etc. are added as stabilizers. USP 2,3
45,134@) is often performed.
このような場合、他の急結薬剤を添加するとアルミン酸
アルカリの安定剤としての性能あるいはこれに付随して
急結剤としての性能の損われることが多いという問題点
がめった。In such cases, the problem often arises that when other quick-setting agents are added, the performance of the alkali aluminate as a stabilizer or the accompanying performance as a quick-setting agent is often impaired.
（発明の目的）
本発明者らは液体急結剤の長所を生かしつつ、なおその
急結性能を高めるため、種々検討を行った結果本発明に
到達した。本発明の目的はアルミン酸アルカリ−炭酸ア
ルカリ系の液体急結剤において、さらに急結性能を高め
る配合薬剤を提供することにある。(Objective of the Invention) The present inventors have conducted various studies in order to take advantage of the advantages of liquid quick-setting agents and still improve their quick-setting performance, and as a result, have arrived at the present invention. An object of the present invention is to provide a compounded agent that further improves the quick-setting performance of an alkali aluminate-alkali carbonate liquid quick-setting agent.
（発明の構成）
本発明はアルミン酸アルカリと炭酸アルカリとを主成分
とする水溶液に、ピロリン酸アルカリ塩を配合したこと
を特徴とするセメント用急結剤でおる。(Structure of the Invention) The present invention is a quick-setting agent for cement, which is characterized in that an alkali pyrophosphate salt is blended into an aqueous solution containing an alkali aluminate and an alkali carbonate as main components.
上記アルミン駿フフルカリ、炭酸アルカリとしては、リ
チウム塩、ナトリウム塩、カリウム塩が挙げられるが、
その）ｄ解性ヤ粘性の点からカリウム塩が好ましい。ア
ルミン酸アルカリと炭酸アルカリの水への配合割合は、
例えばアルミン酸カリウムを酸化カリウムとして１０〜
２０重但％、酸化アルミニウムとして５〜１５重♀％、
また炭酸カリウムを１５〜３０重量％に調整することが
急結性能及び作業性向上のために望ましい。Examples of the above-mentioned aluminium fluoride and alkali carbonate include lithium salt, sodium salt, and potassium salt.
Potassium salts are preferred from the viewpoint of d-lysis and viscosity. The mixing ratio of alkali aluminate and alkali carbonate to water is
For example, potassium aluminate as potassium oxide is 10~
20% by weight, 5-15% by weight as aluminum oxide,
Further, it is desirable to adjust potassium carbonate to 15 to 30% by weight in order to improve rapid setting performance and workability.
上記ピロリン酸アルカリ塩としてはナトリウム塩、カリ
ウム塩等がおるが、急結剤が高濃度のアルカリ塩なので
、そのいずれを配合しても効果は変わらないが溶解性の
面からカリウム塩が望ましい。The above-mentioned alkali pyrophosphate salts include sodium salts, potassium salts, etc. Since the quick-setting agent is a highly concentrated alkali salt, the effect remains the same no matter which one is added, but potassium salts are preferred from the viewpoint of solubility.
ピロリン酸アルカリ塩の配合割合は上記水溶液に対して
無水物として０．１〜１０重１％、好ましくは０．５〜
５重母％がよい。１０重但％を超えると急結性能が低下
する。The blending ratio of the alkali pyrophosphate is 0.1 to 10% by weight, preferably 0.5 to 1% by weight as anhydride to the above aqueous solution.
quintuple mother% is good. If it exceeds 10%, the rapid setting performance will decrease.
本発明の急結剤は、長期間の保存を要する場合等必要に
応じて、前記のグルコン酸類や酒石酸類等安定剤を急結
性能を損うことなく添加することができる。If necessary, such as when long-term storage is required, the quick-setting agent of the present invention may contain stabilizers such as the aforementioned gluconic acids and tartaric acids without impairing quick-setting performance.
本発明品の使用方法は、吹付コンクリートの混練水にあ
らかじめ溶解しておくか、ポンプ等を用いて混練水に圧
入混合するか、あるいは急結剤のみをノズル先端に注入
すればよい。使用但は通常の吹付工事ではセメント但に
対し１〜１０ｆｉｉ％、好ましくは４〜６重母％である
。なお本発明に用いられるセメントはポルトランドセメ
ントが望ましいが、高炉セメント、シリカセメント、フ
ライアッシュセメント等の混合セメントにも用いられる
。The product of the present invention can be used by dissolving it in advance in the mixing water for shotcrete, by press-mixing it into the mixing water using a pump, or by injecting only the quick-setting agent into the nozzle tip. In normal spraying work, it is used in an amount of 1 to 10%, preferably 4 to 6%, based on cement. The cement used in the present invention is preferably Portland cement, but mixed cements such as blast furnace cement, silica cement, and fly ash cement may also be used.
以下実施例により本発明を具体的に説明するが、配合％
は重量基準である。The present invention will be specifically explained below with reference to Examples.
is based on weight.
実施例１ アルミン酸カリウム（水溶液中のに２０１３％。Example 1 Potassium aluminate (2013% in aqueous solution).
八９２０３９％）、炭酸カリウム２５％の水溶液をＡ液
とする。Liquid A is a 25% aqueous solution of potassium carbonate.
このＡ液に対し無水ピロリン酸カリウム０〜１０％添加
して液体急結剤を作った。A liquid quick-setting agent was prepared by adding 0 to 10% of anhydrous potassium pyrophosphate to this liquid A.
この液体急結剤の急結性能を比較するため、普通ポルト
ランドセメント２，０００ｇ、川砂６． ＯＯＯｇ（Ｆ
。In order to compare the quick setting performance of this liquid quick setting agent, 2,000 g of ordinary Portland cement and 6.0 g of river sand were used. OOOg(F
.
Ｍ、 ２．６．表面水率５％）、水をセメントに対し
４５％、液体急結剤をセメントに対し４〜６％配合し約
１０秒間混合してから素早く型枠に詰め、１分後からブ
ロクター貫入抵抗試験（ＡＳＴＭ Ｃ４０３−６３Ｔ
）を行い、始発（５００ＰＳ Ｉ ）と終結（４００
０ＰＳ Ｉ ）までの時間を測定した。その結果を表−
１と表−２に示す。なお試験は２０°Ｃで行った。M, 2.6. Mix 45% water to cement and 4 to 6% liquid quick-setting agent to cement, mix for about 10 seconds, then quickly fill the mold, and after 1 minute, test for broctor penetration resistance. (ASTM C403-63T
), starting (500PS I) and ending (400PS I)
The time until 0PS I ) was measured. Table the results.
1 and Table 2. Note that the test was conducted at 20°C.
実施例２
実施例１におけるＡ液に、無水ピロリン酸カリウムを１
％添加して作成した液体急結剤の圧縮強度への影響をみ
るため、Ｊ ｌ５Ｒ５２０１−９セメントの強さ試験を
行った。Example 2 Add 1 part of anhydrous potassium pyrophosphate to Solution A in Example 1.
A strength test was conducted on J15R5201-9 cement to see the effect of the liquid quick-setting agent on the compressive strength.
普通ポルトランドセメント６００（］ 、川砂１８００
ｊｊ＜Ｆ、 Ｍ、 ２．６．表面水率５％）、水をセ
メントに対し４５％、液体急結剤をセメントに対し６％
配合し約１０秒間混合してから素早（４ｘ ４ｘ１６ｃ
ｍの二連型枠に詰め、脱型後所定材令まで、温度２０’
Ｃ。Ordinary Portland cement 600 (], river sand 1800
jj<F, M, 2.6. Surface water rate: 5%), water to cement: 45%, liquid quick setting agent: 6% to cement
Combine and mix for about 10 seconds, then quickly (4x 4x16c
Filled into a double formwork of 500 m in diameter and kept at a temperature of 20' until the specified material age after demolding.
C.
湿度９０％で養生した。なおＡ液のみ、および急結剤無
添加の場合の試験をも併せて行った。その結果を表−３
に示す。Cured at 90% humidity. In addition, tests were also conducted using only liquid A and when no quick-setting agent was added. Table 3 shows the results.
Shown below.
表−３モルタルの圧縮強度 （Ｋａｆ／ｃｒｉ＞■
Ａ液に対するピロリン酸カリウム添加凹２％以上のごと
く本発明品は凝結試験においても強度試験、特に急結効
果上最も重要な初期強度（１〜６時間）においても、Ａ
液のみ配合の場合に比較し明らかに顕著な急結性能を有
している。Table-3 Compressive strength of mortar (Kaf/cri>■
As shown by the addition of potassium pyrophosphate of 2% or more to liquid A, the product of the present invention has a high level of A, both in the setting test and in the strength test, especially in the initial strength (1 to 6 hours), which is the most important for rapid setting effects.
It clearly has remarkable rapid setting performance compared to the case where only liquid is mixed.
なお実施例１．２の本発明急結剤を室温にて３ケ月間故
置したところ、水酸化アルミニウム等の結晶の析出は全
く認められなかった。When the quick-setting agent of the present invention of Example 1.2 was allowed to stand at room temperature for 3 months, no precipitation of crystals such as aluminum hydroxide was observed.
（弁明の効果）
本発明セメント用急結剤は従来の液体急結剤に比較して
急結性が高いので、セメントに対する添加足を減少する
ことが可能で経済的に有利であり、特に初期強度が高い
ので特にナトムエ法において有効に用いられる。また安
定剤を含有するため艮明間性能を変化することなく保存
しうる。(Effect of explanation) The quick-setting agent for cement of the present invention has higher quick-setting properties than conventional liquid quick-setting agents, so it is economically advantageous because it can reduce the amount added to cement. Because of its high strength, it is particularly effectively used in the Natome method. Also, since it contains a stabilizer, it can be stored without changing its performance over time.
Claims (1)
溶液に、ピロリン酸アルカリ塩を配合したことを特徴と
するセメント用急結剤。A quick-setting agent for cement, characterized in that an alkali pyrophosphate salt is blended into an aqueous solution whose main components are alkali aluminate and alkali carbonate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15545586A JPS6311556A (en) | 1986-07-02 | 1986-07-02 | Cement accelerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15545586A JPS6311556A (en) | 1986-07-02 | 1986-07-02 | Cement accelerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6311556A true JPS6311556A (en) | 1988-01-19 |
| JPH0210108B2 JPH0210108B2 (en) | 1990-03-06 |
Family
ID=15606417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15545586A Granted JPS6311556A (en) | 1986-07-02 | 1986-07-02 | Cement accelerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6311556A (en) |
-
1986
- 1986-07-02 JP JP15545586A patent/JPS6311556A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0210108B2 (en) | 1990-03-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4920440B2 (en) | Admixture | |
| AU2004215680B2 (en) | Accelerator admixture | |
| BRPI0807674A2 (en) | SOLIDIFICATION AND HARDENING ACCELERATOR FOR HYDRAULIC AGLUTINANTS AND PROCESSES FOR PREPARATION | |
| NO162903B (en) | LIQUID STRAIGHT ACCELERATOR FOR CONCRETE MIXTURES AND USE THEREOF. | |
| JPH06199555A (en) | Glycol-containing additive for promoting hardening of hydraulic cement | |
| JP6586417B2 (en) | Quick setting admixture | |
| JP5763661B2 (en) | Quick setting agent for hydraulic binder, and rapid curing method of hydraulic binder | |
| JP4439805B2 (en) | Admixture | |
| BR112016026574B1 (en) | SOLIDIFICATION AND HARDENING ACCELERATOR FOR HYDRAULIC BINDINGS, USE THEREOF, METHOD FOR ACCELERATING THE SOLIDIFICATION AND HARDENING OF HYDRAULIC BINDINGS, OF CONCRETE INCLUDING HYDRAULIC BINDERS, OR OF MORTAR INCLUDING HYDRAULIC BINDINGS, MIXING INCLUDING CONFORMED BINDING BINDINGS, AND CONFORMED BINDINGS | |
| JPS5914513B2 (en) | Soil stabilization method using chemical solutions | |
| JPS6311556A (en) | Cement accelerator | |
| JPS6256343A (en) | Accelerator for cement | |
| JPH1171145A (en) | Quick setting material, spraying material and quick setting spraying cement concrete | |
| JPH0238532B2 (en) | ||
| JP2005035856A (en) | Spray material and spraying method of construction using the same | |
| JPH0238530B2 (en) | ||
| JP4883917B2 (en) | Production method of spray material | |
| JPS59169957A (en) | Cement accelerator | |
| JP5189282B2 (en) | Ground injection agent and ground injection method using the same | |
| JPS59156946A (en) | Quick hardening agent for spray concrete | |
| JP2568221B2 (en) | Method for forming cement suspension composition | |
| JPS6215116B2 (en) | ||
| JP2001163650A (en) | Quick-setting agent for cement | |
| JP5189283B2 (en) | Ground injection agent and ground injection method using the same | |
| JPS6231759B2 (en) |