JP2686870B2 - Underwater mortar - Google Patents
Underwater mortarInfo
- Publication number
- JP2686870B2 JP2686870B2 JP3344867A JP34486791A JP2686870B2 JP 2686870 B2 JP2686870 B2 JP 2686870B2 JP 3344867 A JP3344867 A JP 3344867A JP 34486791 A JP34486791 A JP 34486791A JP 2686870 B2 JP2686870 B2 JP 2686870B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- admixture
- mortar
- weight
- strength
- 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
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は水中モルタルに関し、特
に、水中構造物を構築すべく使用する水中モルタルに関
する。FIELD OF THE INVENTION This invention relates to underwater mortar, and more particularly to underwater mortar for use in constructing underwater structures.
【０００２】[0002]
【従来の技術】従来より、例えば、基礎杭やフーチング
等の海中構造物を構築する際に、水中モルタルを打設す
る。そして、かかる水中モルタルには、打設に際し水中
において混合した各材量が分離しないように水中不分離
性混和剤が添加されるとともに、その流動性を確保すべ
く高性能減水剤が添加される。したがって、かかる混和
剤の作用により水中モルタルの強度の発現が遅延し、早
強セメントや早強性混和剤等を使用した場合でも、例え
ば材令１日で３０kgf／cm2、材令２日で２００kgf／cm2
程度の強度しか得ることができない。2. Description of the Related Art Conventionally, for example, underwater mortar is placed when constructing undersea structures such as foundation piles and footings. Then, to such an underwater mortar, an underwater non-separable admixture is added so as not to separate the respective amounts of materials mixed in water during casting, and a high performance water reducing agent is added to ensure the fluidity of the admixture. . Therefore, due to the action of the admixture, the development of the strength of the mortar in water is delayed, and even when using early-strength cement or an early-strength admixture, for example, 30 kgf / cm 2 in 1 day of age and 2 days in age of 200 kgf / cm 2
You can only get some strength.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記従
来の水中モルタルでは、打設後速やかに強度発現するこ
とが望まれる水中構造物、例えば杭基礎を構築すべくこ
れらを用いる場合は、打設した水中モルタルが所定の強
度に達するまでクレーン船等を用いて杭を固定しておか
なければならない。したがって、長時間杭を固定してお
く必要を生じ、クレーン船等の使用料が嵩んで施工コス
トが高くなるとともに施工期間が長期化するという問題
があった。However, in the above-mentioned conventional underwater mortar, when these are used for constructing an underwater structure, for example, a pile foundation, which is required to develop strength immediately after being placed, it is placed. Piles must be fixed using a crane ship, etc. until the underwater mortar reaches the specified strength. Therefore, there is a problem that it is necessary to fix the piles for a long time, the usage fee of a crane ship or the like increases, the construction cost increases, and the construction period extends.
【０００４】そこで、本発明は上記問題点に着目してな
されたもので、モルタルの水中における不分離性や流動
性を保持しつつ、打設後短時間で所定の強度を発現する
ことのできる水中モルタルを提供することを目的とす
る。Therefore, the present invention has been made in view of the above-mentioned problems, and it is possible to develop a predetermined strength in a short time after casting while maintaining the inseparability and fluidity of mortar in water. Intended to provide underwater mortar.
【０００５】[0005]
【課題を解決するための手段】本発明は、上記目的に鑑
みてなされたもので、その要旨は、早強セメントと、水
と、細骨材と、膨脹性混和材と、促進形ＡＥ減水剤と、
水中不分離性混和剤と、水中不分離性混和剤助剤とを含
み、無水セッコウを含まない水中モルタルであって、前
記細骨材及び前記膨脹性混和材の配合量が早強セメント
１００重量部に対しそれぞれ１００〜１６０重量部及び
３〜８重量部であることを特徴とする水中モルタルにあ
る。SUMMARY OF THE INVENTION The present invention has been made in view of the above objects, and its gist is to provide a high-strength cement and water.
, Fine aggregate, expansive admixture, accelerated AE water reducing agent,
Contains a water-separable admixture and a water-separable admixture auxiliary
Mortar in water containing no anhydrous gypsum,
The amount of the fine aggregate and the expansive admixture is high-strength cement
100 to 160 parts by weight per 100 parts by weight and
The mortar in water is characterized in that it is 3 to 8 parts by weight .
【０００６】ここで、早強セメントを使用した水中モル
タルとは、セメント成分として早強セメントを用いたモ
ルタルであって、水中において材料分離を生じない水中
不分離性を備えたモルタルをいう。Here, the underwater mortar using early-strength cement is a mortar using early-strength cement as a cement component and having a non-separating property in water that does not cause material separation in water.
【０００７】以下本発明をさらに詳細に説明する。The present invention will be described in more detail below.
【０００８】本発明の水中モルタルは、早強セメント
と、水と、細骨材とを含む水中モルタルにおいて、該水
中モルタルに膨張性混和材を配合するものである。The underwater mortar of the present invention is an underwater mortar containing early-strength cement, water, and fine aggregate, and an expansive admixture is added to the underwater mortar.
【０００９】そして、本発明の水中モルタルは、例え
ば、早強セメントと、水と、細骨材と、膨張性混和材
と、促進形ＡＥ減水剤と、水中不分離性混和剤と、水中
不分離性混和剤助剤とによって構成することが好まし
い。The underwater mortar of the present invention comprises, for example, early-strength cement, water, fine aggregate, expansive admixture, accelerated AE water-reducing agent, in-water non-separable admixture, and in-water immiscible agent. It is preferably constituted by a separating admixture aid.
【００１０】ここで、本発明の水中モルタルに用いる早
強セメントとしては、例えばＪＩＳＲ ５２１０に示さ
れる早強ポルトランドセメント等を使用する。Here, as the early-strength cement used in the underwater mortar of the present invention, for example, the early-strength Portland cement shown in JISR 5210 is used.
【００１１】また、前記水及び細骨材は、コンクリート
の材料として通常用いられるものを使用する。そして、
水中モルタルに加える水の配合量は、これらに用いる早
強セメント１００重量部に対し、３６〜４５重量部とす
ることが好ましい。水の配合量が３６重量部より少ない
とフローが小さくなって打設しにくくなるため、４５重
量部を超えると強度発現が遅くなるとともに強度が低下
するためいずれも好ましくない。また、細骨材の配合量
は早強セメント１００重量部に対し、１００〜１６０重
量部とすることが好ましい。細骨材の配合量が１００重
量部より少ないとフローが小さくなるとともに粘性が高
くなって打設しにくくなるため、１６０重量部を超える
と強度の低下をもたらすためいずれも好ましくない。As the water and fine aggregate, those commonly used as a material for concrete are used. And
The amount of water added to the mortar in water is preferably 36 to 45 parts by weight with respect to 100 parts by weight of the early-strength cement used for them. If the content of water is less than 36 parts by weight, the flow becomes small and it becomes difficult to place the material. If it exceeds 45 parts by weight, the strength development becomes slow and the strength decreases, which is not preferable. The amount of the fine aggregate is preferably 100 to 160 parts by weight with respect to 100 parts by weight of early-strength cement. If the amount of the fine aggregate is less than 100 parts by weight, the flow becomes small and the viscosity becomes high and it becomes difficult to place the fine aggregate. If it exceeds 160 parts by weight, the strength is lowered, which is not preferable.
【００１２】そして、前記膨張性混和材とは、例えばＪ
ＩＳ Ａ ６６０２「コンクリート用膨張材」に示され
る、モルタルを適度に膨張させてこれの収縮を低減し、
かつモルタルの強度発現を促進する作用を有する混和材
をいい、好ましくは石灰系膨張材、さらに好ましくは製
品名「エクスパン」（（株）小野田製）等を使用する。
そして、前記膨張性混和材の配合量は、早強セメント１
００重量部に対して３〜８重量部とすることが好まし
い。３重量部より少ないと練り混ぜ後にモルタルが収縮
するため、８重量部を超えると膨張量が大きくなりすぎ
るとともに、強度低下をもたらし、さらに材料コストも
高くなるためいずれも好ましくない。The expansive admixture is, for example, J
As shown in IS A 6602 "Expansion material for concrete", the mortar is appropriately expanded to reduce its shrinkage,
In addition, it refers to an admixture having an action of promoting the strength development of mortar, preferably a lime-based expansive material, more preferably a product name "Expan" (manufactured by Onoda Co., Ltd.) and the like.
And, the compounding amount of the expansive admixture is 1
It is preferably 3 to 8 parts by weight with respect to 00 parts by weight. If the amount is less than 3 parts by weight, the mortar contracts after kneading, and if the amount exceeds 8 parts by weight, the amount of expansion becomes too large, the strength is lowered, and the material cost becomes high, which is not preferable.
【００１３】前記促進形ＡＥ減水剤とは、モルタルの凝
結を促進して初期強度を増大する作用を有する混和剤を
いい、例えばリグニンスルホン酸系混和剤、好ましくは
製品名「ポゾリスNo.75」（ポゾリス物産製）等を使用
する。そして、前記促進形ＡＥ減水剤を配合する際の配
合量は、早強セメント１００重量部に対して１．０〜
２．０重量部とすることが好ましい。１．０重量部より
少ないと混合する水の量を減少することができず、水中
モルタルの強度を増加することができないため、２．０
重量部より多くしても強度改善効果は変化せず材料コス
トが高くなるためいずれも好ましくない。The accelerated type AE water reducing agent is an admixture having an action of accelerating the setting of mortar and increasing the initial strength, for example, a ligninsulfonic acid type admixture, preferably a product name "Pozoris No. 75". (Manufactured by Pozzolis Bussan) or the like is used. And the compounding quantity at the time of mix | blending the said accelerated type AE water reducing agent is 1.0-about 100 weight part of early strength cement.
It is preferably 2.0 parts by weight. If the amount is less than 1.0 part by weight, the amount of water to be mixed cannot be reduced and the strength of the mortar in water cannot be increased.
If the amount is more than the weight part, the strength improving effect does not change and the material cost increases, which is not preferable.
【００１４】前記水中不分離性混和剤とは、フレッシュ
モルタルを水中に打設しても、水の洗いによる材料分離
を生じさせない作用を有する混和剤をいい、例えばセル
ロース系混和剤、好ましくは製品名「ニッショウオーシ
ャンSP-12」（日商岩井ケミカル製）等を使用する。そ
して、前記不分離性混和剤を配合する際の配合量は、早
強セメント１００重量部に対して０．１〜０．４重量部
とすることが好ましい。０．１重量部より少ないと水中
で水中モルタルが分離するため、０．４重量部を超える
と水中モルタルの凝結時間が長くなって強度発現までの
時間が長くなるとともに材料コストも高くなるためいず
れも好ましくない。The underwater non-separable admixture refers to an admixture having an action of not causing material separation by washing with water even when fresh mortar is poured into water, for example, a cellulosic admixture, preferably a product. The name "Nissho Ocean SP-12" (manufactured by Nissho Iwai Chemical) is used. And, the compounding amount of the non-separable admixture is preferably 0.1 to 0.4 parts by weight with respect to 100 parts by weight of the early cement. If the amount is less than 0.1 parts by weight, the underwater mortar will separate in water, and if the amount exceeds 0.4 parts by weight, the setting time of the underwater mortar will be long, the time until strength development will be long, and the material cost will increase. Is also not preferable.
【００１５】さらに、前記水中不分離性混和剤助剤と
は、モルタルの流動性を高めこれが潤滑機能を有するよ
う作用する混和剤をいい、例えばメラミンスルホン酸塩
系の流動化剤、好ましくは製品名「ＵＣ-150」（ポゾリ
ス物産製）等を使用する。そして、前記水中不分離性混
和剤助剤を配合する際の配合量は、早強セメント１００
重量部に対して２．０〜５．０重量部とすることが好ま
しい。２．０重量部より添加量が少ないとモルタルの流
動性が小さくなるため、５．０重量部より多くしても、
流動効果が変化せず、材料コストが高くなるためいずれ
も好ましくない。Furthermore, the A water nondisjunction of admixtures aids, which enhance the fluidity of the mortar refers to admixtures which act to have a lubricating function, e.g. Mera Mi Nsuruhon acid salt-based fluidizing agent, preferably The product name "UC-150" (manufactured by Pozoris) is used. And the compounding quantity at the time of mix | blending the said non-separable admixture in water is 100 times early cement.
The amount is preferably 2.0 to 5.0 parts by weight with respect to parts by weight. 2.0 Since the addition amount than the weight part flowability of less mortar becomes smaller, even when more than 5.0 parts by weight,
Both are not preferable because the flow effect does not change and the material cost increases.
【００１６】[0016]
【実施例】以下本発明を実施例及び比較例によりさらに
詳細に説明するが、本発明はこれらに限定されるもので
はない。EXAMPLES The present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited thereto.
【００１７】[0017]
【実施例１〜４】早強セメント、水、細骨材、膨張性混
和材、促進形ＡＥ減水剤、水中不分離性混和剤、水中不
分離性混和剤助剤を表１に示す割合で混合した実施例１
〜４に示す水中モルタルについて、土木学会による「水
中不分離性コンクリート設計施工指針（案）」に従って
行なった実験により求められた材料特性を表２の実施例
１〜４に示す。なお、膨張性混和材として「エクスパ
ン」（（株）小野田製）を、促進形ＡＥ減水剤として
「ポゾリスNo.75」（ポゾリス物産製）を、水中不分離
性混和剤として「ニッショウオーシャンSP-12」（日商
岩井ケミカル製）を、水中不分離性混和剤助剤として
「ＵＣ-150」（ポゾリス物産製）を各々使用した。ま
た、これらの水中モルタルに要求される材料特性は、材
令２４時間で圧縮強度１５０kgf／cm2以上、可使時間６
０分以上で、ポンプによる打設が可能な流動性を有する
ものとする。[Examples 1 to 4] Early strength cement, water, fine aggregate, expansive admixture, accelerated AE water reducing agent, inseparable admixture in water, inseparable admixture in water at the ratios shown in Table 1. Mixed Example 1
Examples 1 to 4 in Table 2 show the material properties of the underwater mortars shown in Tables 4 through 4, which are obtained by experiments conducted in accordance with the "Guideline for designing and constructing underwater-separable concrete (draft)" by the Japan Society of Civil Engineers. In addition, "Expan" (manufactured by Onoda Co., Ltd.) as an expansive admixture, "Pozoris No.75" (manufactured by Pozoris Co., Ltd.) as an accelerated AE water reducing agent, and "Nissho Ocean SP-" as an inseparable admixture in water. 12 "(manufactured by Nissho Iwai Chemical Co., Ltd.) and" UC-150 "(manufactured by Pozzolis Co., Ltd.) were used as auxiliary agents for the inseparable admixture in water. In addition, the material properties required for these underwater mortars are that the compression strength is 150 kgf / cm 2 or more and the pot life is 6 after 24 hours.
It should have fluidity that can be set by a pump in 0 minutes or more.
【００１８】[0018]
【比較例１】早強セメント、水、細骨材、促進形ＡＥ減
水剤、水中不分離性混和剤、水中不分離性混和剤助剤を
表１に示す配合割合で混合した膨張性混和材を使用しな
い比較例１に示す水中モルタルについて、土木学会によ
る「水中不分離性コンクリート設計施工指針（案）」に
従って行なった実験により求められた材料特性を表２の
の比較例１に示す。促進形ＡＥ減水剤、水中不分離性混
和剤、水中不分離性混和剤助剤は実施例１〜４と同様の
ものを使用した。[Comparative Example 1] Expansive admixture obtained by mixing early-strength cement, water, fine aggregate, accelerated AE water reducing agent, inseparable admixture in water, and inseparable admixture in water in auxiliary compounding ratios shown in Table 1. Table 2 shows the material properties of the underwater mortar shown in Comparative Example 1 obtained by an experiment conducted according to "Guideline for designing and constructing underwater-separable concrete (draft)" by the Japan Society of Civil Engineers. As the accelerated AE water reducing agent, the inseparable admixture in water, and the inseparable admixture in water, auxiliary agents similar to those in Examples 1 to 4 were used.
【００１９】[0019]
【表１】 [Table 1]
【００２０】[0020]
【表２】 [Table 2]
【００２１】また、比較例１、及び実施例１〜４の配合
による水中モルタルについて行なったＪＩＳ Ａ １１０
８「コンクリートの圧縮強度試験方法」による圧縮強度
試験の試験結果を図１に示す。Also, JIS A 110 was carried out on mortar in water having the composition of Comparative Example 1 and Examples 1 to 4.
Fig. 1 shows the test results of the compressive strength test according to "Compressive strength test method for concrete".
【００２２】かかる実験結果から、本発明による実施例
１〜４の水中モルタルが、早期に強度を発現すべくその
特性を改善し、材令２４時間後には予定される圧縮強度
１５０kgf／cm2に達することが判明する。From the above experimental results, the mortars in water of Examples 1 to 4 according to the present invention improved their properties in order to develop their strength early, and after 24 hours, reached the expected compressive strength of 150 kgf / cm 2 . Turns out to reach.
【００２３】[0023]
【発明の効果】以上のように、本発明の水中モルタル
は、早強セメントを使用した水中モルタルに膨張性混和
材を配合して構成されるので、水中モルタルの水中にお
ける不分離性や流動性を保持しつつ、これらの強度発現
までの時間を大幅に短縮することができる。したがっ
て、かかる水中モルタルを使用することにより、これら
が打設後速やかに強度を発現することを求められる水中
構造物において、他の建設機械等を長期間使用すること
なく経済的な水中構造物の構築を可能にするとともに、
工期の短縮を図ることができる。INDUSTRIAL APPLICABILITY As described above, the underwater mortar of the present invention is constituted by mixing an expansive admixture with an underwater mortar using a high-strength cement. It is possible to significantly reduce the time required to develop these strengths while maintaining the above. Therefore, by using such an underwater mortar, in an underwater structure which is required to develop strength immediately after being placed, it is possible to economically construct an underwater structure without using other construction machinery for a long time. While enabling construction,
The construction period can be shortened.
【図面の簡単な説明】[Brief description of the drawings]
【図１】比較例１、及び実施例１〜４の配合による水中
モルタルについて行なった圧縮強度試験の試験結果を示
すチャートである。FIG. 1 is a chart showing the test results of a compressive strength test performed on mortar in water having the formulations of Comparative Example 1 and Examples 1 to 4.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ０４Ｂ 24:00） (72)発明者 宮野 一也 東京都港区北青山２−５−８ 株式会社 間組内 (56)参考文献 特開 平２−271947（ＪＰ，Ａ) 特開 昭62−207747（ＪＰ，Ａ)─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification number Office reference number FI technical display location C04B 24:00) (72) Inventor Kazuya Miyano 2-5-8 Kita-Aoyama, Minato-ku, Tokyo (56) Reference JP-A-2-271947 (JP, A) JP-A-62-207747 (JP, A)
Claims (1)
混和材と、促進形ＡＥ減水剤と、水中不分離性混和剤
と、水中不分離性混和剤助剤とを含み、無水セッコウを
含まない水中モルタルであって、前記細骨材及び前記膨
脹性混和材の配合量が早強セメント１００重量部に対し
それぞれ１００〜１６０重量部及び３〜８重量部である
ことを特徴とする水中モルタル。1. A high-strength cement, water, fine aggregate, and expandability.
Admixture, accelerated AE water reducing agent, and water inseparable admixture
And an inseparable admixture aid in water, anhydrous gypsum
Mortar in water that does not contain the fine aggregate and the swelling.
The amount of expansive admixture is 100 parts by weight of early-strength cement.
Mortar in water, characterized in that they are 100 to 160 parts by weight and 3 to 8 parts by weight, respectively .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3344867A JP2686870B2 (en) | 1991-12-26 | 1991-12-26 | Underwater mortar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3344867A JP2686870B2 (en) | 1991-12-26 | 1991-12-26 | Underwater mortar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05170502A JPH05170502A (en) | 1993-07-09 |
| JP2686870B2 true JP2686870B2 (en) | 1997-12-08 |
Family
ID=18372609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3344867A Expired - Fee Related JP2686870B2 (en) | 1991-12-26 | 1991-12-26 | Underwater mortar |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2686870B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5145918B2 (en) * | 2007-12-19 | 2013-02-20 | 住友大阪セメント株式会社 | Underwater inseparable cement-based filling composition and underwater inseparable cement mortar |
| JP5950099B2 (en) * | 2012-05-30 | 2016-07-13 | 三菱マテリアル株式会社 | Underwater non-separable non-shrink grout |
| JP6482861B2 (en) * | 2014-12-25 | 2019-03-13 | 太平洋マテリアル株式会社 | Inseparable mortar composition in water |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62207747A (en) * | 1986-03-04 | 1987-09-12 | 大成建設株式会社 | Manufacture of underwater concrete |
| JP2820953B2 (en) * | 1989-04-11 | 1998-11-05 | 電気化学工業株式会社 | Underwater concrete composition |
-
1991
- 1991-12-26 JP JP3344867A patent/JP2686870B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05170502A (en) | 1993-07-09 |
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