JP2824327B2 - Mortar material and kneading-free method using it - Google Patents
Mortar material and kneading-free method using itInfo
- Publication number
- JP2824327B2 JP2824327B2 JP25668890A JP25668890A JP2824327B2 JP 2824327 B2 JP2824327 B2 JP 2824327B2 JP 25668890 A JP25668890 A JP 25668890A JP 25668890 A JP25668890 A JP 25668890A JP 2824327 B2 JP2824327 B2 JP 2824327B2
- Authority
- JP
- Japan
- Prior art keywords
- cement
- mortar
- water
- weight
- mortar material
- 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
- Piles And Underground Anchors (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、モルタル材料及びそれを用いた混練り不要
工法に関し、主として、各種支柱の固定、簡易舗装及び
各種補修用等に使用されるモルタル材料及びそれを使用
した混練り不要工法に関する。Description: TECHNICAL FIELD The present invention relates to a mortar material and a kneading-free method using the same, and is mainly used for fixing various columns, simple pavement, and various repairs, etc. The present invention relates to a material and a kneading-free method using the same.
従来、モルタル等を施工する場合、材料と水とを混練
りし、所定の場所に打設するのが通常であった。Conventionally, when mortar or the like is constructed, it has been usual to knead a material and water and place the mixture in a predetermined place.
また、セメント急硬材を混和したモルタルを混練りす
る場合、作業性を維持するため、硬化時間の設定、モル
タル混練り器具の準備及びモルタル混練り後の器具等の
水洗等の作業が必要であった。In addition, when kneading a mortar mixed with a cement rapidly hardened material, it is necessary to set a curing time, prepare a mortar kneading device, and wash the device with water after the mortar kneading to maintain workability. there were.
一方、既製コンクリート杭の施工法は杭頭を打撃し圧
入する方法が一般的であるが、それらは騒音が激しく、
杭頭を痛めやすい等の課題があった。その課題を改良し
た方法として、中堀り工法やドリル工法が提案されてい
るが、これらの方法は杭の根固めを必要とし、セメント
ミルク注入などで根固めを行なっているが、注入機械設
備等のプラントが必要とするという課題があった。On the other hand, as for the method of construction of ready-made concrete piles, the method of hitting and press-fitting the pile head is common, but they are noisy,
There were problems such as the pile head being easily damaged. As a method to solve the problem, the middle boring method and the drilling method have been proposed, but these methods require the consolidation of piles and perform the consolidation by cement milk injection. There was a problem that the plants needed.
本発明者らは、前記課題を解消すべく種々検討した結
果、特定のモルタル材料を用いることにより、水の中に
モルタル材料を投入するだけで、モルタル硬化体が出来
る知見を得て、本発明を完成するに至った。The present inventors have conducted various studies to solve the above-described problems, and as a result, by using a specific mortar material, obtained a knowledge that a mortar cured body can be obtained only by throwing the mortar material into water, Was completed.
即ち、本発明は、セメント、セメント急硬材及び最大
粒径2.5mm、粒径0.5mm下が50〜80％の細骨材からなるモ
ルタル材料であり、該モルタル材料を水の中に投入し、
硬化させることを特徴とする混練り不要工法であり、さ
らに、コンクリート杭の根固め部に水を入れ、その中
に、該モルタル材料を投入し、硬化することを特徴とす
るコンクリート杭の根固め工法セメントである。That is, the present invention relates to a mortar material comprising cement, a cement rapidly hardened material, and a fine aggregate having a maximum particle size of 2.5 mm and a particle size of 0.5 to 50% below 50 to 80%, and the mortar material is put into water. ,
It is a kneading-free construction method characterized by hardening, and furthermore, water is poured into a concrete pile rooting part, the mortar material is put therein, and the concrete pile is hardened. It is a construction method cement.
以下、本発明を詳細に説明する。 Hereinafter, the present invention will be described in detail.
本発明に係るセメントとしては、特に限定されるもの
ではなく、普通、早強、超早強、中庸熱及び耐硫酸塩等
の各種ポルトランドセメントや、高炉セメント、フライ
アッシュセメント及びシリカセメントの各種混合セメン
トなどが挙げられる。The cement according to the present invention is not particularly limited, and includes various kinds of Portland cements such as ordinary, fast, super fast, moderate heat and sulfate resistant, and various kinds of blast furnace cement, fly ash cement and silica cement. Cement and the like.
本発明に係るセメント急硬材としては、珪酸ナトリウ
ム、炭酸ナトリウム、アルミン酸ナトリウム及び塩化カ
ルシウム等の無機塩類や、アルミナセメントやカルシウ
ムアルミネートあるいはカルシウムアルミネートとセッ
コウとの混合物などセメントの凝結硬化を促進する物質
が使用可能である。中でも、凝結開始時間の調整の容易
性、短時間強度発現性及び長期安定性等の面から、カル
シウムアルミネート又はカルシウムアルミネートとセッ
コウの混合物の使用が好ましい。Examples of the cement quick-hardening material according to the present invention include inorganic salts such as sodium silicate, sodium carbonate, sodium aluminate and calcium chloride, and setting and hardening of cement such as alumina cement, calcium aluminate or a mixture of calcium aluminate and gypsum. Accelerating substances can be used. Among them, use of calcium aluminate or a mixture of calcium aluminate and gypsum is preferred from the viewpoints of easy adjustment of the setting start time, short-term strength development, and long-term stability.
カルシウムアルミネートとしては、CaO含有量が37〜5
5重量％のものがよく、結晶質形のものより、非晶質形
のものが強度発現に優れている面から好ましい。As calcium aluminate, CaO content is 37-5
An amount of 5% by weight is preferable, and an amorphous type is more preferable than a crystalline type in terms of excellent strength development.
セッコウとしては、特に制限されるものではないが、
II型無水セッコウが好適である。Although it is not particularly limited as gypsum,
Type II anhydrous gypsum is preferred.
カルシウムアルミネートに対するセッコウの使用割合
は、短時間強度発現や長期安定性の理由から、２重量倍
以下が好ましい。The use ratio of gypsum to calcium aluminate is preferably 2 times by weight or less from the viewpoint of short-term strength development and long-term stability.
セメント急硬材の添加量は、セメント100重量部に対
して、８〜50重量部が好ましく、10〜40重量部がより好
ましい。８重量部未満であると、初期の凝結速度が遅
く、材料分離の恐れが有り、50重量部を超えても、物性
面では大きく変わらず経済的でない。The amount of the cement hardened material is preferably 8 to 50 parts by weight, more preferably 10 to 40 parts by weight, based on 100 parts by weight of the cement. If the amount is less than 8 parts by weight, the initial setting speed is low, and there is a risk of material separation. If it exceeds 50 parts by weight, the physical properties are not significantly changed and it is not economical.
細骨材としては、川砂や海砂などの自然砂や、硅砂、
砕砂及び石灰砂等いずれも使用可能である。As fine aggregate, natural sand such as river sand and sea sand, silica sand,
Both crushed sand and lime sand can be used.
細骨材の最大粒径は2.5mmで、1mm下が分離抵抗性の面
から好ましい。2.5mmより大きいとモルタルを水に投入
したとき分離しやすくなる。また、粒径0.5mm下が50〜8
0％である。50％未満であると、モルタル混合時分離し
やすく、80％を越えると水の分散が不良で、セメント未
反応部分が残る可能性がある。The maximum particle size of the fine aggregate is 2.5 mm, and preferably 1 mm or less from the viewpoint of separation resistance. If it is larger than 2.5 mm, the mortar is easily separated when poured into water. In addition, particle size 0.5mm below 50-8
0%. If it is less than 50%, it is easy to separate when mixing the mortar, and if it exceeds 80%, the dispersion of water is poor and the unreacted portion of the cement may remain.
細骨材の使用量は、セメントとセメント急硬材の合計
100重量部に対して、30〜300重量部が好ましく、50〜15
0重量部がより好ましい。30重量部未満では水に投入時
モルタル材料中に水を吸収しずらく、300重量部を超え
ると材料の分離の恐れがある。The amount of fine aggregate used is the sum of cement and cement
For 100 parts by weight, 30 to 300 parts by weight is preferable, and 50 to 15 parts by weight.
0 parts by weight is more preferred. If it is less than 30 parts by weight, it is difficult to absorb water into the mortar material when it is put into water, and if it exceeds 300 parts by weight, the material may be separated.
本発明のモルタル材料を用いる場合、凝結調節剤とし
てホウ酸、リン酸及びケイ弗化物等又はその塩の無機化
合物、クエン酸、酒石酸及びグルコン酸等のオキシカル
ボン酸又はその塩などを使用することができる。また、
前記凝結調節剤をアルカリ炭酸塩と併用すれば、その効
果は大きい。When the mortar material of the present invention is used, an inorganic compound such as boric acid, phosphoric acid and silicofluoride or a salt thereof, an oxycarboxylic acid such as citric acid, tartaric acid and gluconic acid or a salt thereof or the like is used as a setting modifier. Can be. Also,
If the setting modifier is used in combination with an alkali carbonate, the effect is large.
本発明のモルタル材料の凝結開始時間は、分離や沈降
防止のために短いことが好ましく、その時間は数秒〜10
分が好ましく、30秒〜５分がより好ましい。The setting start time of the mortar material of the present invention is preferably short in order to prevent separation and sedimentation, and the time is several seconds to 10 seconds.
Minutes is preferable, and 30 seconds to 5 minutes are more preferable.
本発明のモルタル材料に、さらに、水中コンクリート
混和剤やセメント減水剤を混和すると水中での分散を効
率よく抑えることが可能である。When the mortar material of the present invention is further mixed with an underwater concrete admixture or a cement water reducing agent, dispersion in water can be efficiently suppressed.
本発明のモルタル材料を施工する場合は、穴などの施
工個所にその体積の40〜70％程度の水を張り、その穴に
モルタル材料を表面まで投入し、表面を均し、一連の作
業を終了とする。When the mortar material of the present invention is applied, water of about 40% to 70% of the volume is filled in a site such as a hole, the mortar material is poured into the hole, the surface is leveled, and a series of operations are performed. End.
材料の投入方法は縦穴では上部より固まりが出来ない
程度に投入し、幅の広い穴では、下より均一に立上るよ
うに投入することが、物性面から好ましい。From the viewpoint of physical properties, it is preferable that the material is charged in such a manner that the material cannot be solidified from the upper portion in the vertical hole, and that the material is charged uniformly in the wide hole from the lower portion.
材料の投入は、バラで投入するか、もしくは、水溶性
フイルム、ビニール袋及び紙袋等に入れ上部より投入
し、落下後棒等で破裂させるか、水に溶ける物質、例え
ば、オブラート等に包み、投入し、投入後すぐに包みが
水に溶解し、モルタル材料が硬化するようにする方法な
どいずれの方法でもよい。また、下部より均一に投入す
る方法として、例えば、５〜10mmのフルイを使用し、散
布投入することは物性面から好ましい。Materials can be put in loosely, or put in a water-soluble film, plastic bag, paper bag, etc., put it in from the top, burst it with a stick etc. after falling, or wrap it in a substance soluble in water, such as oblate, etc. Any method may be used, such as a method in which the wrap is dissolved in water immediately after being charged and the mortar material is hardened. Further, as a method of uniformly feeding from the lower portion, for example, it is preferable to use a sieve having a size of 5 to 10 mm and to sprinkle the material from the viewpoint of physical properties.
本発明のモルタル材料は、中堀り工法をはじめ、ドリ
ル工法などに使用可能である。The mortar material of the present invention can be used for a drilling method as well as a middle boring method.
ここで中堀り工法とは、先端開放の杭の中空部にオー
ガーを挿入し、このオーガーによって先端地盤を堀削
し、中空部を通して土砂を上部へ排出しながら杭を沈下
させてゆく方法である。使用されるオーガーは連続オー
ガー部と先端のオーガーヘッドから成り、根固め部で
は、支持力を増大させるため、杭内径より大きく拡大で
きる翼を使用する場合もある。こうして支持地盤の堀削
を行なう。Here, the middle excavation method is a method in which an auger is inserted into the hollow part of a pile with an open tip, the tip ground is excavated by this auger, and the pile is settled while discharging earth and sand to the upper part through the hollow part. . The auger used is composed of a continuous auger part and an auger head at the tip, and a wing that can be enlarged larger than the inside diameter of the pile may be used in the rooting part in order to increase the supporting force. Excavation of the supporting ground is performed in this manner.
このように堀削された根固め部に、その体積の40〜70
％の水を入れ、この中に上部より本発明のモルタル材料
を投入し、硬化させ、根固めを終了する。In this way, the volume of 40-70
% Of water, and the mortar material of the present invention is poured from above into the mortar, and the mortar is hardened to complete the consolidation.
また、水の最少量は投入するセメント分の50％程度以
上あれば本工法は可能である。Also, this method is possible if the minimum amount of water is about 50% or more of the amount of cement to be charged.
以下、実施例により、さらに本発明を説明する。 Hereinafter, the present invention will be further described with reference to examples.
実施例１ セメント100重量部、セメント急硬材30重量部、細骨
材130重量部及び凝結遅延剤0.4重量部からなるモルタル
材料を作成した。Example 1 A mortar material composed of 100 parts by weight of cement, 30 parts by weight of cement quick-hardened material, 130 parts by weight of fine aggregate and 0.4 part by weight of a setting retarder was prepared.
道路中央にできた深さ15cm、長さ30cm、幅15cmの穴
に、水を底より7.5cmまで入れ、作成したモルタル材料
を投入した。投入後表面をコテで均し、10分後に道路が
開放できた。なお、硬化時間は60秒であった。その後６
ケ月を経過しても摩耗やクラックの発生も無く、その表
面は良好であった。Water was poured into the hole 15cm deep, 30cm long and 15cm wide formed in the center of the road, up to 7.5cm from the bottom, and the prepared mortar material was charged. After the loading, the surface was leveled with a trowel, and the road was opened 10 minutes later. The curing time was 60 seconds. Then 6
Even after a lapse of months, there was no abrasion or cracking, and the surface was good.
〈使用材料〉 セメント：電気化学工業（株）製普通ポルトランドセメ
ント セメント急硬材：カルシウムアルミネート／セッコウの
重量比が1/1 細骨材：姫川産川砂、1mm下 凝結遅延剤：試薬クエン酸ナトリウム 比較例1. 同様に、クエン酸ナトリウムを0.4重量部入れた15lの
モルタルを、20lペルー缶中、ハンドミキサーで、回転
数1,000rpm、30秒間混練し、作業を行なったが、作業中
に硬化し施工不能となった。<Material used> Cement: Ordinary Portland cement manufactured by Denki Kagaku Kogyo Co., Ltd. Cement hardened material: Calcium aluminate / gypsum weight ratio is 1/1 Fine aggregate: Himekawa-produced river sand, 1 mm below Setting retarder: Reagent citric acid Sodium Comparative Example 1. Similarly, 15 l of mortar containing 0.4 parts by weight of sodium citrate was kneaded with a hand mixer in a 20 l Peruvian can with a hand mixer at 1,000 rpm for 30 seconds. It hardened and could not be installed.
比較例2. クエン酸ナトリウムを1.2重量部入れたこと以外は、
比較例１と同様に行なったが、道路開放が約１時間かか
った。Comparative Example 2. Except for adding 1.2 parts by weight of sodium citrate,
The procedure was performed in the same manner as in Comparative Example 1, but it took about one hour to open the road.
なお、施工道路の準備片付け等で２時間弱掛かり、実
施例１に比べ約10倍の手間が掛かった。In addition, it took less than two hours to prepare and clear the construction road, and it took about ten times as much labor as in Example 1.
実施例2. 表−１に示す配合を用いてモルタル材料を作成した。Example 2 A mortar material was prepared using the composition shown in Table 1.
直径5cm、深さ30cmのビニール製袋に、水の高さが目
標高さの半分になるように水を入れ、その中に作成した
モルタル材料を投入し、硬化し、硬化体を作製した。Water was poured into a vinyl bag having a diameter of 5 cm and a depth of 30 cm so that the height of the water was half of the target height, and the mortar material thus prepared was charged therein and cured to produce a cured product.
硬化体の下端から2.5cmと、上端から2.5cmからと各々
高さ10cmの供試体を切断し、１日圧縮強度を測定した。
また、上、下端から2.5cmの各々の切断面の分離状態を
確認した。結果を表−１に併記する。Specimens each having a height of 10 cm, each 2.5 cm from the lower end and 2.5 cm from the upper end of the cured body, were cut, and the one-day compressive strength was measured.
Further, the separated state of each cut surface of 2.5 cm from the upper and lower ends was confirmed. The results are shown in Table 1.
実施例３ 長さ12m、外径500mm、厚さ80mmの遠心力鉄筋コンクリ
ート杭を中堀工法にて挿入した。この時の根固め部の体
積は0.5m3であった。そこに水を300l入れ、上部より、
セメント100重量部、カルシウムアルミネートとセッコ
ウの重量比1/1のセメント急硬材15重量部、1.2mm下天然
砂150重量部及びクエン酸ナトリウム0.4重量部からなる
本発明のモルタル材料500kgを投入した。投入後３分で
硬化した。その後不等沈下等は見られなかった。 Example 3 A centrifugal reinforced concrete pile having a length of 12 m, an outer diameter of 500 mm and a thickness of 80 mm was inserted by the Nakahori method. At this time, the volume of the solidified portion was 0.5 m 3 . Put 300l of water there and from the top,
500 kg of mortar material of the present invention consisting of 100 parts by weight of cement, 15 parts by weight of cement rapidly hardened material having a weight ratio of calcium aluminate to gypsum of 1/1, 150 parts by weight of natural sand under 1.2 mm and 0.4 part by weight of sodium citrate did. It was cured 3 minutes after charging. Thereafter, no uneven settlement was observed.
実施例４ 表−２に示す配合を用いてモルタル材料を作成した。Example 4 A mortar material was prepared using the composition shown in Table-2.
直径5cm、深さ30cmのビニール製に水の高さが12cmに
なるように水を入れ、その中に作成したモルタル材料を
高さが24cmになるように投入し、ビニール袋内の硬化状
態を目視した。結果を表−２に併記する。Pour water so that the height of the water will be 12 cm in a vinyl made of 5 cm in diameter and 30 cm in depth, and put the mortar material created in it so that the height will be 24 cm, and check the cured state in the plastic bag. I saw it. The results are shown in Table-2.
〔発明の効果〕 このように、本発明は、練り混ぜ不要のため、練り混
ぜの手間がかからず、混練り機械やペースト注入などの
プラントが必要無く、後片付けの雑工事がほとんど無
く、施工が簡単となる。また、数分で硬化するため短時
間に施工現場の開放が可能となる。 [Effects of the Invention] As described above, the present invention does not require kneading, so there is no need for kneading, there is no need for a kneading machine or a plant such as paste injection, and there is almost no miscellaneous work for cleaning up. Becomes easier. In addition, since it cures in a few minutes, the construction site can be opened in a short time.
さらに、この工法は根固めを必要とする他のコンクリ
ート杭工法、例えば、電柱の根固め等種々の工法に適用
できる。Further, this method can be applied to other concrete pile methods requiring solidification, such as solidification of utility poles.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｃ０４Ｂ 22:08） 103:14 (58)調査した分野(Int.Cl.6，ＤＢ名) C04B 28/02 C04B 20/00 C04B 22/08──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. 6 identification code FI C04B 22:08) 103: 14 (58) Field surveyed (Int.Cl. 6 , DB name) C04B 28/02 C04B 20/00 C04B 22/08
Claims (3)
5mm、粒径0.5mm下が50〜80％の細骨材からなるモルタル
材料。Cement, cement hardened material and maximum particle size of 2.
Mortar material composed of fine aggregate with 5mm, particle size 0.5mm and below 50-80%.
投入し、硬化させることを特徴とする混練り不要工法。2. A kneading-free method, wherein the mortar material according to claim 1 is put into water and cured.
の中に、請求項１記載のモルタル材料を投入し、硬化す
ることを特徴とするコンクリート杭の根固め工法。3. A method for consolidating concrete piles, wherein water is poured into the consolidation portion of the concrete pile, and the mortar material according to claim 1 is charged therein and hardened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25668890A JP2824327B2 (en) | 1990-09-26 | 1990-09-26 | Mortar material and kneading-free method using it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25668890A JP2824327B2 (en) | 1990-09-26 | 1990-09-26 | Mortar material and kneading-free method using it |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04132644A JPH04132644A (en) | 1992-05-06 |
| JP2824327B2 true JP2824327B2 (en) | 1998-11-11 |
Family
ID=17296097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25668890A Expired - Fee Related JP2824327B2 (en) | 1990-09-26 | 1990-09-26 | Mortar material and kneading-free method using it |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2824327B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4403155B2 (en) * | 2006-08-07 | 2010-01-20 | ショーボンド建設株式会社 | Concrete water channel repair method |
| JP4516550B2 (en) * | 2006-08-07 | 2010-08-04 | 独立行政法人農業・食品産業技術総合研究機構 | Concrete water channel repair method |
| JP2020158311A (en) * | 2017-07-26 | 2020-10-01 | デンカ株式会社 | Cement based composition not requiring blending, and method of using the same |
-
1990
- 1990-09-26 JP JP25668890A patent/JP2824327B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04132644A (en) | 1992-05-06 |
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