JPS61236668A - Method of curing concrete - Google Patents
Method of curing concreteInfo
- Publication number
- JPS61236668A JPS61236668A JP7982785A JP7982785A JPS61236668A JP S61236668 A JPS61236668 A JP S61236668A JP 7982785 A JP7982785 A JP 7982785A JP 7982785 A JP7982785 A JP 7982785A JP S61236668 A JPS61236668 A JP S61236668A
- Authority
- JP
- Japan
- Prior art keywords
- concrete
- water
- absorbing agent
- curing
- polymeric
- 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.)
- Pending
Links
- 239000004567 concrete Substances 0.000 title claims description 61
- 238000000034 method Methods 0.000 title claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 65
- 239000006096 absorbing agent Substances 0.000 claims description 30
- 238000001723 curing Methods 0.000 claims description 24
- 239000004568 cement Substances 0.000 claims description 18
- 238000009415 formwork Methods 0.000 claims description 11
- 239000000126 substance Substances 0.000 claims description 5
- 239000004606 Fillers/Extenders Substances 0.000 claims 2
- 238000010521 absorption reaction Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 6
- 238000007796 conventional method Methods 0.000 description 5
- 230000036571 hydration Effects 0.000 description 5
- 238000006703 hydration reaction Methods 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000945 filler Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 239000000499 gel Substances 0.000 description 3
- 230000020169 heat generation Effects 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 239000004067 bulking agent Substances 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229920002126 Acrylic acid copolymer Polymers 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical compound OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 241000270666 Testudines Species 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009430 construction management Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- -1 etc.) Substances 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000008149 soap solution Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000008030 superplasticizer Substances 0.000 description 1
- 230000002522 swelling effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000002699 waste material 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、水、砂利等を混練したり、混練し
たコンクリートを打設するときには取扱いが容易で、養
生中は保護をより完全にし、硬化後は強度が増加するよ
うなコンクリートの養生方法に関するものである。[Detailed Description of the Invention] "Industrial Application Field" The present invention is easy to handle when mixing cement, water, gravel, etc., and when pouring mixed concrete, and provides more complete protection during curing. , relates to a method of curing concrete that increases its strength after hardening.
「従来の技術」
一般に、コンクリートの強度その他の性質はセメントペ
ースト中の水セメント比により支配され、これはいわゆ
る水セメント比法則といわれる。水セメント比（通常の
取扱い上の慣習から逆数のセメント水比（Ｃ／Ｗ）で表
示することが多い）と圧縮強度（σ）との関係は凡そ次
式であられされる。"Prior Art" Generally, the strength and other properties of concrete are controlled by the water-cement ratio in the cement paste, and this is called the water-cement ratio law. The relationship between the water-cement ratio (often expressed as the reciprocal cement-water ratio (C/W) due to common handling practices) and the compressive strength (σ) is approximately expressed by the following equation.
σ＝Ａ＋Ｂ−Ｃ／Ｗ
ここに、ＡおよびＢは材料および試験条件に関する定数
であり、その−例が第２図に示される。σ=A+B−C/W where A and B are constants related to materials and test conditions, an example of which is shown in FIG.
この第２図からも明白なように、水セメン１〜比が小さ
くなると、つまり水の使用量を減じれば圧縮
亀強度が増大する。しかし、砂利、砂、セメント、
水等の練り混ぜ易さ、打設・締固め易さなどの取扱い易
さを良くするために、コンクリートの強度を発現させる
基本作用、つまりセメントの水和作用に最小限必要な水
量にさらに余分な水を添加しているのが実情である。As is clear from Figure 2, if the water-cement ratio decreases, that is, if the amount of water used decreases, the compression will increase.
Turtle strength increases. However, gravel, sand, cement,
In order to improve ease of handling such as ease of mixing with water, ease of pouring and compaction, etc., an additional amount of water is added to the minimum amount required for the basic action to develop the strength of concrete, that is, the hydration action of cement. The reality is that water is added.
このような余分な水を添加することに伴うコンクリート
のもつ欠点を補うため従来は、種々の養生方法がとられ
ていた。すなわち、第４図は、型枠（］）にコンクリー
ト（２）を打設し、コンクリート（２）の表面に布、ス
ポンジ状マット、むしるなどの濡れたシート（３）をか
ぶせる方法であり、第５図はパラフィン溶剤、ラテック
ス溶剤などの膜養生剤（４）を散布する方法であり、第
６図は真空マット（５）とパネル（６）をかぶせ、真空
ポンプで真空吸引する方法であり、さらに、セメントの
混練時に、ＡＥ剤などのような各種の減水剤を混入する
方法なども行なわれていた。Conventionally, various curing methods have been used to compensate for the disadvantages of concrete caused by adding extra water. That is, Fig. 4 shows a method in which concrete (2) is poured into a formwork (]), and the surface of the concrete (2) is covered with a wet sheet (3) such as a cloth, a sponge-like mat, or a strip. Figure 5 shows a method of spraying a film curing agent (4) such as paraffin solvent or latex solvent, and Figure 6 shows a method of covering a vacuum mat (5) with a panel (6) and vacuum suction with a vacuum pump. Furthermore, methods have also been used in which various water reducing agents such as AE agents are mixed into the cement during kneading.
「発明が解決しようとする問題点」
コンクリート養生はつぎのような目的を達成することに
ある。``Problems to be solved by the invention'' Concrete curing aims to achieve the following objectives.
第１の目的：霜、日光、雨、風などに対するコンクリー
ト露出面の保護。Primary purpose: protection of exposed concrete surfaces against frost, sunlight, rain, wind, etc.
第２の目的：コンクリート硬化中の湿度の供給。Secondary purpose: supply of humidity during concrete curing.
第３の目的：凝結前に含まれている余剰の水の排出。Third purpose: drainage of excess water contained before condensation.
しかるに、従来の各種の方法のうち、第１の濡れたシー
ト（３）をかぶせる方法は、第１、第２の目的を蓮成す
るためにあるが、その使用時期はコンクリートの凝結が
かなり進んで表面が乾燥してからであり、また、この第
１の方法では第３の目的を達成することはできず、さら
に風が吹いたり、鉄筋の存在などによ、リコンクリート
（２）とシート（３）との間に隙間が生じ、目的を充分
達成することはできないばかりか、シート（３）の被覆
作業やその後の散水などに多大の手間を要するという問
題があった。However, among the various conventional methods, the method of covering with the first wet sheet (3) is intended to achieve the first and second purposes, but it is used when the concrete has already set considerably. In addition, this first method cannot achieve the third objective, and the reconcrete (2) and sheet may be damaged due to wind blowing, the presence of reinforcing steel, etc. There is a gap between the sheet (3) and the sheet (3), which not only makes it impossible to fully achieve the objective, but also requires a great deal of effort for covering the sheet (3) and sprinkling water afterwards.
第２の膜養生剤（４）を散布する方法は、コンクリート
の表面に膜養生剤の薄い不透水膜を形成し、コンクリー
ト内部の水分蒸発を防止して前記第１、第２の目的を達
成しようとするものであるが、ピンホールからの蒸発に
より効果が低減するため厳重な施工管理が必要であり、
また第３の目的に対しては全くその効果がなかった。The second method of spraying the film curing agent (4) is to form a thin impermeable film of the film curing agent on the surface of the concrete to prevent water evaporation inside the concrete and achieve the first and second objectives. However, the effectiveness is reduced due to evaporation from the pinholes, so strict construction management is required.
Furthermore, it had no effect on the third objective.
第３の真空ポンプで真空吸引する方法は、コンクリート
（２）中の余剰の水をマット（５）を通過させて吸い取
り排出するものであり、吸水効果とともに、大気圧を加
圧することで第２図の特性図からも明らかなように高強
度のコンクリートを得ることができるが、以後の養生に
ついては前記第１または第２の養生方法を併用する必要
があり、準備が大がかりであり、費用も高いため、一般
的な方法ではなかった。The third method of vacuum suction using a vacuum pump is to pass the excess water in the concrete (2) through the mat (5) and suck it out. As is clear from the characteristic diagram in the figure, high-strength concrete can be obtained, but for subsequent curing it is necessary to use the first or second curing method in combination, which requires extensive preparation and costs. It was not a common method because it was expensive.
第４の減水剤や流動化剤を混線時に混入する方法は、厳
重な計量管理が必要であり、計量ミスは勿論、現物の締
め固めの程度によっては目的とする効果が得られないこ
とがあり、しかもコストが高くなるという問題があった
。The method of mixing a fourth water reducer or superplasticizer at the time of crosstalk requires strict measurement control, and the desired effect may not be obtained depending on the degree of compaction of the actual material as well as measurement errors. However, there was a problem in that the cost was high.
「問題点を解決するための手段」 □ ・本発明は以
上のような問題点を解決するためになされたもので、セ
メント、水、砂利等を混練したコンクリートを型枠に打
設し、この打設した凝結前のコンクリートの表面に高分
子吸水剤を散布し、凝結前のコンクリート内部の水分を
吸収して水セメント比を低くし、かつ吸水ゲル化した高
分子吸水剤膜で凝結後のコンクリートの表面を湿潤状態
に保持するようにしたものである。高分子吸水剤には増
量剤を添加し、これを噴霧器によってより均一にコンク
リートの全表面に散布する。"Means for Solving the Problems" □ - The present invention was made to solve the above problems, and consists of pouring concrete mixed with cement, water, gravel, etc. into a formwork, and A polymeric water-absorbing agent is sprinkled on the surface of poured concrete before setting, absorbing the moisture inside the concrete before setting, lowering the water-cement ratio, and using a polymeric water-absorbing agent film that absorbs water and becomes a gel to absorb moisture inside the concrete before setting. It is designed to keep the concrete surface moist. A bulking agent is added to the polymeric water absorbing agent, and this is distributed more uniformly over the entire surface of the concrete using a sprayer.
「作用」
コンクリートの硬化現象は、セメントと水が適当な湿度
のもとに化学的な水和作用をなすことによるものである
が、その強度は水セメント比が小さい程大きい。しかる
に、打設時は、作業性の向上のため余分な水を含んでい
るとしても、打設直後に高分子吸水剤で吸水して強度を
高める。凝結の開始後数日から数ケ月にわたり硬化を続
行するが、この硬化中の水和作用に必要な水分を補充す
る必要がある。しかるに、高分子吸水剤は当初吸水膨潤
した寒天状の膜によりコンクリートの表面を湿潤状態に
保持する。この膜はコンクリート自身の発熱や太陽熱で
水分を放出して養生期間は常に湿潤状態を保持する。``Function'' The hardening phenomenon of concrete is due to the chemical hydration of cement and water under appropriate humidity, and its strength increases as the water-cement ratio decreases. However, even if extra water is included during pouring to improve workability, the water is absorbed by the polymeric water-absorbing agent immediately after pouring to increase strength. After the onset of setting, curing continues for several days to several months, and it is necessary to replenish the water necessary for hydration during this curing. However, the polymeric water-absorbing agent initially maintains the concrete surface in a moist state by forming an agar-like film that swells upon absorption of water. This membrane releases moisture through the concrete's own heat generation and solar heat, keeping it constantly moist during the curing period.
「実施例」 以下、本発明の実施例を図面により説明する。"Example" Embodiments of the present invention will be described below with reference to the drawings.
第１図において、（］）は型枠で、この型枠（１）内に
、砂利、砂、セメント、水等を混練したコンクリート（
２）が打設される。このとき、水セメント比は打設時に
取扱い易いように、高目に設定してもよい。コンクリー
ト（２）を打設し、まだ固まらないうちに、型枠（１）
に接していないコンクリート（２）の表面に、吸水膨潤
性を有する高分子吸水剤（７）を被覆する。この高分子
吸水剤（７）は、具体的には、ビニルアルコール／アク
リル酸共重合体を主成分とするもので、純水で５００〜
７００倍、０．９％のＮａＣＱ水溶液で４０〜６０倍の
吸水能を有し、吸水状態ではゲル強度を保ち保水能を有
するものである。この高分子吸水剤（７）は、１５０〜
２５０μの粉体であって、わずかな使用量で大きな吸水
能力を有するから、コンクリート（２）の表面を均一に
被覆する場合は適当な粉体の増量材と混合して噴霧器に
よって散布することが望ましい。In Figure 1, (]) is a formwork, and inside this formwork (1), concrete (
2) is poured. At this time, the water-cement ratio may be set high for ease of handling during pouring. After pouring the concrete (2), and before it hardens, place the formwork (1)
The surface of the concrete (2) that is not in contact with the concrete (2) is coated with a polymer water-absorbing agent (7) having water-absorbing and swelling properties. Specifically, this polymeric water absorbing agent (7) is mainly composed of vinyl alcohol/acrylic acid copolymer, and has a molecular weight of 500 to 500% in pure water.
It has a water absorption capacity of 700 times and 40 to 60 times that of a 0.9% NaCQ aqueous solution, and maintains gel strength and water retention capacity in the water absorption state. This polymeric water absorbing agent (7) has a molecular weight of 150~
It is a powder of 250μ and has a large water absorption capacity with a small amount of use, so if you want to uniformly coat the surface of concrete (2), you can mix it with an appropriate powder filler and spray it with a sprayer. desirable.
この高分子吸水剤（７）は、コンクリート（２）の中の
水分であって、硬化時の水和作用に必要な水分を残して
吸収する。つまり、コンクリート（２）の凝結に不要な
内部の余剰の水まで毛細管現象で高分子吸水剤（７）が
瞬時に吸湿してしまうので、この高分子吸水剤（７）は
ゲル化して寒天状の厚さ１〜数ｍｍの膜を形成する。This polymeric water absorbing agent (7) absorbs the moisture in the concrete (2), leaving only the moisture necessary for hydration during hardening. In other words, the polymeric water-absorbing agent (7) instantly absorbs moisture through capillary action, even the excess water inside that is not needed for the concrete (2) to set, so this polymeric water-absorbing agent (7) gels and becomes agar-like. A film with a thickness of 1 to several mm is formed.
コンクリート（２）は凝結を開始してからさらに数日か
ら数ケ月にわたり硬化を続行するため、水和作用に必要
な水分を補強する必要がある。しかるに、当初吸水膨潤
した寒天状の高分子吸水剤（７）の膜は１．蒸発するこ
となく保水しているので、コンクリート（２）の表面を
湿潤状態に保持する役目をなす。この高分子吸水剤（７
）の膜は、コンクリート自身の発熱や太陽熱によっであ
る程度の水分を放出する。養生期間が数日の場合は硬化
時の発熱で当初に保水した水分を放出するので充分湿潤
状態を保持する。しかし、長期間の養生を必要とす＝７
−
る場合には、ときどき散水することによって、再び吸水
して湿潤状態を保持することができる。また、コンクリ
ート（２）の凝結初期に、コンクリート自身の発熱、風
、太陽熱などを受伐乾燥、収縮してひび割れが生じ易い
が吸水した寒天状の膜でコンクリート（２）の表面を保
護し、ひび割れを防止する。Since concrete (2) continues to harden for several days to several months after it starts setting, it is necessary to reinforce the water necessary for hydration. However, the film of the agar-like polymeric water-absorbing agent (7) that initially swelled after absorbing water was 1. Since it retains water without evaporating, it plays a role in keeping the surface of concrete (2) moist. This polymeric water absorbing agent (7
) membrane releases a certain amount of moisture due to the concrete's own heat generation and solar heat. If the curing period is several days, the heat generated during curing will release the water initially retained, so it will remain sufficiently moist. However, it requires long-term curing = 7
- If the soil is wet, it can be re-absorbed and kept moist by sprinkling with water from time to time. In addition, during the initial setting of concrete (2), the surface of concrete (2) is protected by an agar-like film that absorbs water, although it tends to dry, shrink, and crack due to the concrete's own heat generation, wind, and solar heat. Prevent cracks.
従来の方法と本発明の方法による試験の結果はつぎの通
りである。The results of tests using the conventional method and the method of the present invention are as follows.
標準供試体：直径１５ｃｍＸ高さ３０ｃ＋ｎの円柱体（
最大砂利４０ｍｍ）
この試験結果からも明らかなように、吸水剤散布前と散
布後では、圧縮強度が約５．３〜６．４％上昇した。Standard specimen: Cylindrical body with a diameter of 15 cm and a height of 30 cm + n (
(Maximum gravel: 40 mm) As is clear from the test results, the compressive strength increased by about 5.3 to 6.4% before and after the water absorbing agent was sprayed.
なお、試験対象のコンクリートは、低スランプ−８＝
でセメント量の少ない貧配合のダム用コンクリートにあ
ったために強度増加が上述程度にとどまつだが、一般用
のスランプ１０〜２Ｑｃ＋ｎの富配合の場合には、さら
に大きな強度増加が期待できる。 １
つぎに、高分子吸水剤（７）の適正使用量について検討
する。The concrete tested was a dam concrete with a low slump -8= and a poor mix with a small amount of cement, so the increase in strength remained at the above level, but in the case of a rich mix with a general slump of 10~2Qc+n. An even greater increase in strength can be expected. 1
Next, the appropriate amount of the polymeric water absorbing agent (7) to be used will be discussed.
前記試験に用いた標準供試体の使用水量は、１０８ ｋ
ｇ ／ ｒｒｉ’であり、これを標準供試体（直径１５
ｃ＋ｎＸ高さ３０ｃｍ）の体積に換算するとω＝１０．
８ｋｇ／ ｍ Ｘ ０．００５３信＝５７２ｇの使用水
量となる。The amount of water used for the standard specimen used in the above test was 108 k
g/rri', and this is used as a standard specimen (diameter 15
ω=10.
8kg/m x 0.0053cm = 572g of water usage.
一方、高分子吸水剤（７）の吸水能力は純水で５００〜
７００倍といわれており、アルカリ分による吸水能力低
下はあっても高分子吸水剤（７）の散、布量１ｇで全使
用水量の５７２ｇに近い水分を吸い込むことができる能
力がある。実際にはコンクリート中にかなり・の水分が
残されていることを考え合せると、実際の高分子吸水剤
（７）の使用量は１ｇ以下で十分といえる。このことは
、試験結果において使用量１ｇと３名との間に強度上の
有意差がないことからもわかる。On the other hand, the water absorption capacity of the polymeric water absorbing agent (7) is 500 ~
It is said to be 700 times more absorbent, and even though the water absorption capacity is reduced due to alkaline content, it has the ability to absorb water close to 572g of the total amount of water used with 1g of cloth and spraying the polymeric water absorbing agent (7). Considering that a considerable amount of water is actually left in concrete, it can be said that 1 g or less of the polymeric water absorbing agent (7) is actually sufficient. This can be seen from the fact that in the test results, there was no significant difference in strength between the amount used by 1 g and 3 people.
したがって、実際の使用水量により異なるが近似的に、
単位面積当りの使用量（Δω）は次式のように算定でき
る。Therefore, although it depends on the actual amount of water used, approximately:
The amount used per unit area (Δω) can be calculated as follows.
＝５０ｇ／ボ
このことから、ボ当り約５０ｇの高分子吸水剤（７）を
散布すればよい。=50g/bore Therefore, about 50g of the polymeric water absorbing agent (7) should be sprayed per pot.
つぎに、増量材の必要性について説明する。前述の通り
、吸水剤の使用量（八〇）は、ｍ′当り約５０ｇとわず
かであり、その嵩は通常のコツプの半分以下程度であり
、これを均等に散布し、むらが生じぬようにする必要が
ある。また、乾燥後の撤去時に剥し易いように連結材と
しての役目もあった方が良い。このような目的を達成で
きる増量材としては高分子吸水剤の吸水能力を低下させ
ない物質（強酸性や強アルカリ性でないもの）であれば
よい。増量材自身もある程度の吸水能力があればなお良
い。例として、パルプ、繊維（綿くず、化学繊維等）な
どの他、砂、石粉等の鉱物粉末が用い＝１１−
られる。Next, the necessity of filler material will be explained. As mentioned above, the amount of water absorbing agent used (80) is only about 50g per m', and its bulk is less than half that of a normal pot. It is necessary to It is also better if it also serves as a connecting material so that it can be easily peeled off when removed after drying. The filler that can achieve this purpose may be any substance (not strongly acidic or strongly alkaline) that does not reduce the water absorbing ability of the polymeric water absorbing agent. It is better if the filler itself has a certain amount of water absorption capacity. Examples include pulp, fibers (cotton waste, chemical fibers, etc.), and mineral powders such as sand and stone powder.
また、この増量材の混合量は散布状況が目視で確認でき
、むらが生じない程度の増量範囲であればよい。具体的
には高分子吸水剤（７）の３〜１００倍（重量比）程度
と考えられる。Further, the mixing amount of the bulking agent may be within a range that allows for visual confirmation of the dispersion status and does not cause unevenness. Specifically, it is thought to be about 3 to 100 times (weight ratio) that of the polymeric water absorbing agent (7).
本発明は平板状のコンクリートに粉末の高分子吸水剤を
散布することを主眼としている。しかし、壁状コンクリ
ートに応用することもできる。具体的には第３図に示す
ように、型枠（１）のコンクリート（２）と接する内側
面に予め石けん液のような型枠剥離剤としての付着物質
を塗付してその上に粉末状の高分子吸水剤（７）を吹き
つける。その後。The main objective of the present invention is to spray a powdered polymeric water absorbing agent onto a flat concrete plate. However, it can also be applied to concrete walls. Specifically, as shown in Figure 3, an adhesion substance such as soap solution as a formwork release agent is applied in advance to the inner surface of the formwork (1) in contact with the concrete (2), and then powder is applied on top of it. Spray the polymeric water absorbing agent (7). after that.
コンクリート（２）を型枠（１）内に打設することによ
ってコンクリート（２）内の水分を吸い込んで強度を増
大させることができる。By pouring the concrete (2) into the formwork (1), water in the concrete (2) can be absorbed to increase its strength.
「発明の効果」
本発明は上述のような方法を採用したのでっぎのような
効果を有する。"Effects of the Invention" The present invention employs the method described above and has significant effects.
（１）コンクリート打設時に水セメント比が高くできる
ので取扱い作業性にすぐれている。(1) The water-cement ratio can be increased during concrete placement, resulting in excellent handling and workability.
（２）打設後は瞬時に吸水するのでコンクリートの強度
が増大する。(2) After pouring, water is instantly absorbed, increasing the strength of concrete.
（３）大がかりな設備を必要とせず噴霧器程度で済むの
でコストが安い。(3) Cost is low because large-scale equipment is not required and only a sprayer is required.
（４）養生期間中は、コンクリートの発熱で吸水した水
分を放出して硬化に必要な湿潤さを保持でき、養生時の
散水、シートの被覆作業等を要しない。(4) During the curing period, the moisture absorbed by the heat generated by the concrete is released and the moisture necessary for hardening can be maintained, so watering during curing, covering with sheets, etc. are not required.
第１図は本発明によるコンクリートの養生方法を説明す
るための説明図、第２図はコンクリートの圧縮強度の特
性図、第３図は本発明の他の実施例を説明するための説
明図、第４図は従来の第１方法の説明図、第５図は従来
の第２方法の説明図、第６図は従来の第３方法の説明図
である。
（１）・・・型枠、（２）・・・コンクリート、（３）
・・・シート、（４）・・・膜養生剤、（５）・・・真
空マット、（６）・・・パネル、（７）・・・高分子吸
水剤。
出願人 株式会社建機エンジニャリング算 １ 霞
（Ｃ／Ｗ）
第 ４ 閃
茅 ５ 閾
一再獣２FIG. 1 is an explanatory diagram for explaining the concrete curing method according to the present invention, FIG. 2 is a characteristic diagram of compressive strength of concrete, and FIG. 3 is an explanatory diagram for explaining another embodiment of the present invention. FIG. 4 is an explanatory diagram of the first conventional method, FIG. 5 is an explanatory diagram of the second conventional method, and FIG. 6 is an explanatory diagram of the third conventional method. (1)...Formwork, (2)...Concrete, (3)
... Sheet, (4) ... Membrane curing agent, (5) ... Vacuum mat, (6) ... Panel, (7) ... Polymer water absorbing agent. Applicant Construction Machinery Engineering Co., Ltd. 1 Kasumi (C/W) 4th Senka 5 Threshold Ichi Saijuu 2
Claims (4)
打設し、この打設した凝結前のコンクリートの表面を高
分子吸水剤で被覆し、凝結前のコンクリート内部の水分
を吸収して水セメント比を低くし、かつ吸水ゲル化した
高分子吸水剤膜で凝結後のコンクリートの表面を湿潤状
態に保持するようにしたことを特徴とするコンクリート
の養生方法。(1) Concrete mixed with cement, water, gravel, etc. is poured, and the surface of the poured concrete before setting is coated with a polymeric water-absorbing agent, which absorbs the moisture inside the concrete before setting, making it water cement. A concrete curing method characterized by lowering the ratio and keeping the surface of concrete in a wet state after setting with a polymeric water-absorbing agent film that absorbs water and becomes a gel.
によつてより均一にコンクリートの全表面に散布するよ
うにした特許請求の範囲第１項記載のコンクリートの養
生方法。(2) A method for curing concrete according to claim 1, wherein an extender is added to the polymeric water absorbing agent, and the extender is sprayed more uniformly over the entire surface of the concrete using a sprayer.
内側面に付着せしめてなる特許請求の範囲第１項記載の
コンクリートの養生方法。(3) The method for curing concrete according to claim 1, wherein the polymeric water-absorbing agent is attached to the inner surface of a formwork for pouring concrete.
布した後散布付着せしめてなる特許請求の範囲第３項記
載のコンクリートの養生方法。(4) The method for curing concrete according to claim 3, wherein the polymeric water absorbing agent is sprayed onto the inner surface of the formwork after being coated with an adhesion substance in advance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7982785A JPS61236668A (en) | 1985-04-15 | 1985-04-15 | Method of curing concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7982785A JPS61236668A (en) | 1985-04-15 | 1985-04-15 | Method of curing concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61236668A true JPS61236668A (en) | 1986-10-21 |
Family
ID=13701042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7982785A Pending JPS61236668A (en) | 1985-04-15 | 1985-04-15 | Method of curing concrete |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61236668A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05139865A (en) * | 1991-01-14 | 1993-06-08 | Tokuhito Shibata | Improving material for simultaneous suppression of toxic alkali-gas or the like of cement and prevention of cracking or the like and method for improvement |
| JP2012176870A (en) * | 2011-02-28 | 2012-09-13 | Tokai Univ | Method for curing concrete |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57140385A (en) * | 1981-02-18 | 1982-08-30 | Japan National Railway | Concrete curing mat and concrete constructing process |
-
1985
- 1985-04-15 JP JP7982785A patent/JPS61236668A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57140385A (en) * | 1981-02-18 | 1982-08-30 | Japan National Railway | Concrete curing mat and concrete constructing process |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05139865A (en) * | 1991-01-14 | 1993-06-08 | Tokuhito Shibata | Improving material for simultaneous suppression of toxic alkali-gas or the like of cement and prevention of cracking or the like and method for improvement |
| JP2012176870A (en) * | 2011-02-28 | 2012-09-13 | Tokai Univ | Method for curing concrete |
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