JPH0197605A - Method of enhancing surface strength of lightweight foamed concrete - Google Patents
Method of enhancing surface strength of lightweight foamed concreteInfo
- Publication number
- JPH0197605A JPH0197605A JP25389387A JP25389387A JPH0197605A JP H0197605 A JPH0197605 A JP H0197605A JP 25389387 A JP25389387 A JP 25389387A JP 25389387 A JP25389387 A JP 25389387A JP H0197605 A JPH0197605 A JP H0197605A
- Authority
- JP
- Japan
- Prior art keywords
- defoamer
- concrete
- foam
- lightweight
- surface 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 6
- 239000011381 foam concrete Substances 0.000 title claims description 13
- 230000002708 enhancing effect Effects 0.000 title 1
- 238000005507 spraying Methods 0.000 claims abstract description 9
- 239000002518 antifoaming agent Substances 0.000 claims description 17
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 239000004567 concrete Substances 0.000 abstract description 22
- 239000006260 foam Substances 0.000 abstract description 10
- 239000004570 mortar (masonry) Substances 0.000 abstract description 8
- 230000001681 protective effect Effects 0.000 abstract description 5
- 150000001875 compounds Chemical class 0.000 abstract description 3
- 150000002148 esters Chemical class 0.000 abstract description 2
- 229910052710 silicon Inorganic materials 0.000 abstract description 2
- 239000013530 defoamer Substances 0.000 abstract 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract 1
- 150000001408 amides Chemical class 0.000 abstract 1
- 239000012530 fluid Substances 0.000 abstract 1
- 238000010422 painting Methods 0.000 abstract 1
- 239000011347 resin Substances 0.000 abstract 1
- 229920005989 resin Polymers 0.000 abstract 1
- 239000010703 silicon Substances 0.000 abstract 1
- -1 polymethylsiloxane Polymers 0.000 description 6
- 239000004568 cement Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- YIWUKEYIRIRTPP-UHFFFAOYSA-N 2-ethylhexan-1-ol Chemical compound CCCCC(CC)CO YIWUKEYIRIRTPP-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- 229920001451 polypropylene glycol Polymers 0.000 description 2
- 229920002050 silicone resin Polymers 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- JNYAEWCLZODPBN-JGWLITMVSA-N (2r,3r,4s)-2-[(1r)-1,2-dihydroxyethyl]oxolane-3,4-diol Chemical compound OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O JNYAEWCLZODPBN-JGWLITMVSA-N 0.000 description 1
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 1
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 1
- XZIIFPSPUDAGJM-UHFFFAOYSA-N 6-chloro-2-n,2-n-diethylpyrimidine-2,4-diamine Chemical compound CCN(CC)C1=NC(N)=CC(Cl)=N1 XZIIFPSPUDAGJM-UHFFFAOYSA-N 0.000 description 1
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 1
- 241000251468 Actinopterygii Species 0.000 description 1
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 1
- 239000005642 Oleic acid Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000004205 dimethyl polysiloxane Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- 239000006072 paste Substances 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229940035044 sorbitan monolaurate Drugs 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Producing Shaped Articles From Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、表面強度の優れた軽量気泡コンクリートに関
するものであり、土木、建築さらには窯業等の分野にお
ける断熱材、耐火材又は吸音材等の製造に利用できるも
のである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to lightweight cellular concrete with excellent surface strength, and is useful as a heat insulating material, fireproof material, sound absorbing material, etc. in fields such as civil engineering, architecture, and ceramics. It can be used for manufacturing.
ト
未硬化状態にあるセメントペー炊モルタル又はコンクリ
ートを起泡剤の添加により発泡せしめ、これを硬化させ
ることによって気泡を含む軽量のペースト、モルタル又
はコンクリート成型体（以下軽量気泡コンクリートとい
う）が製造されている。A lightweight paste, mortar or concrete molded body containing air bubbles (hereinafter referred to as lightweight cellular concrete) is produced by foaming uncured cement paste mortar or concrete by adding a foaming agent and curing it. ing.
この軽量気泡コンクリートは、その表面が非常ちもろく
、且つ欠は昌いため、表面が何かに触れると、その箇所
が粉状にくずれたり、跡が残ったりする欠点があるので
、その硬化後の表面に保護モルタルをコテ塗りしたり（
例えば、特開昭４８−５７４２７号公報）、また、表面
を積層加圧成形したり（例えば、特開昭４９−６００９
号公報）して強化することが知られている。This lightweight aerated concrete has a very fragile surface and many cracks, so when the surface touches something, it crumbles into powder or leaves marks. Troweling protective mortar on the surface (
For example, Japanese Patent Application Laid-open No. 48-57427), and the surface may be laminated and pressure molded (for example, Japanese Patent Application Laid-Open No. 49-6009).
It is known that it can be strengthened by
しかしながら、従来の方法では、軽量気泡コンクリート
と保護モルタル層とが一体化していないため、接着面が
弱く、且つ少しでも衝撃が加わると保護モルタル層がひ
びわれしたり、はがれ落ちたりする問題点があった。However, in the conventional method, the lightweight cellular concrete and the protective mortar layer are not integrated, so the adhesive surface is weak, and the protective mortar layer can crack or peel off if even the slightest impact is applied. Ta.
このため、軽量気泡コンクリートの平板を成型し、これ
をプレハブ等の部材として使用する際に、著しくその商
品価値を下げているのが実情であった。For this reason, when a flat plate of lightweight aerated concrete is molded and used as a member of a prefabricated product, the commercial value of the concrete is significantly lowered.
本発明者らは、これらの問題点を解決し、表面強度の優
れた軽量気泡コンクリートを提供することを目的として
種々研究した結果、未硬化状態にある軽量気泡コンクリ
ート表面に消泡剤を存在させることによって、軽量気泡
コンクリートの表面強度が著しく向上することを知見し
て本発明を完成した。As a result of various studies aimed at solving these problems and providing lightweight aerated concrete with excellent surface strength, the present inventors discovered that an antifoaming agent is present on the surface of lightweight aerated concrete in an uncured state. The present invention was completed based on the finding that the surface strength of lightweight cellular concrete can be significantly improved by doing so.
本発明は、未硬化状態にある軽量気泡コンクリートの表
面に消泡剤を塗布、噴霧又は滴下し、破泡させることを
特徴とする軽量気泡コンクリートの表面強度増大法であ
る。The present invention is a method for increasing the surface strength of lightweight cellular concrete, which is characterized by coating, spraying, or dropping an antifoaming agent on the surface of uncured lightweight cellular concrete to break the foam.
以下、本発明の詳細な説明する。The present invention will be explained in detail below.
本発明における消泡剤としては、一般に市販されている
ポリメチルシロキサン若しくはポリジメチルシロキサン
等のシリコン樹脂系、２−エチルヘキサノール、オレイ
ン酸若しくはポリプロピレングリコール等の有機極性化
合物系、ソルビタンモノラウリン酸エステル若しくはソ
ルビタントリオレイン酸エステル等のエステル化合物系
、アシル化ポリアミド等のアミド化合物系、その他、鉱
物油系又は金属塩系等がある。The antifoaming agents used in the present invention include generally commercially available silicone resins such as polymethylsiloxane or polydimethylsiloxane, organic polar compounds such as 2-ethylhexanol, oleic acid, or polypropylene glycol, and sorbitan monolaurate or sorbitan. There are ester compounds such as trioleic acid ester, amide compounds such as acylated polyamide, mineral oils, metal salts, and the like.
特に、種別には関係なく、未硬化状態にある軽量気泡コ
ンクリートの表面に該消泡剤を塗布、噴霧又は滴下する
ことによって消泡すると共に、表面をコテやヘラ等でな
でることにより破泡効果があればよい。In particular, irrespective of the type, the antifoaming agent can be applied, sprayed, or dropped onto the surface of uncured lightweight aerated concrete to defoam, and the foam can be broken by stroking the surface with a trowel or spatula. It would be good if there was.
消泡剤を塗布、噴霧又は滴下する時期は、軽量気泡コン
クリートが未硬化状態にある時であり、未硬化状態とは
、軽量気泡コンクリートの流動性がまだある時点から表
面をコテやヘラ等でなでることにより破泡することがで
きる時点までの状態をいう。The time to apply, spray, or drop the antifoaming agent is when the lightweight aerated concrete is in an uncured state, and the uncured state means that the surface of the lightweight aerated concrete should be coated with a trowel, spatula, etc. from the time when the lightweight aerated concrete still has fluidity. This refers to the state up to the point where the bubbles can be broken by stroking.
消泡剤の塗布、噴霧又は滴下には、該消泡剤を水に溶解
して濃度書替０．０１〜３０重量％の水溶液とし、該水
溶液を軽量気泡コンクＩＪ −ト表面上に、一般に行な
われている方法で刷毛塗りしたり、スプレーで噴霧した
り、又は直接滴下したりすればよい。When applying, spraying, or dropping an antifoaming agent, the antifoaming agent is dissolved in water to make an aqueous solution with a concentration of 0.01 to 30% by weight, and the aqueous solution is generally applied onto the surface of a lightweight foam concrete IJ. It can be applied by brushing, spraying, or dropping directly using conventional methods.
他の実施態様としては、消泡剤をセメントペーストやモ
ルタル等に含有せしめて塗布することも有効な方法であ
る。As another embodiment, it is also an effective method to incorporate an antifoaming agent into cement paste, mortar, etc. and apply it.
消泡剤の効果は種類によって異なるので、消泡剤の塗布
、噴霧又は滴下に際しての使用量は特に限定できないが
、軽量気泡コンクリート表面の泡をなくすためには、軽
量気泡コンクリ−）１ｒｄ当り、シリコン樹脂系では０
．３〜３ｇ、有機極性化合物系では０．５〜３ｇ１工ス
テル化合物系では１〜５ｇ１アミド化合物系では１〜５
ｇが好ましい。Since the effect of antifoaming agents differs depending on the type, the amount used when applying, spraying, or dropping antifoaming agents cannot be particularly limited, but in order to eliminate foam on the surface of lightweight cellular concrete, 0 for silicone resin systems
．． 3-3g, 0.5-3g for organic polar compounds, 1-5g for ester compounds, 1-5g for amide compounds.
g is preferred.
軽量気泡コンクリート表面の泡を破泡させるためには、
軽量気泡コンクリートの流動性がまだある時点で消泡剤
を塗布、噴霧又は滴下すればよいが、破泡後の表面を均
一に仕上げるには、セメントが少しゲル化し、軽量気泡
コンクリートの流動性が失なわれた時点で該消泡剤を塗
布、噴霧又は滴下し、コテ、ヘラ、ブラシ又はローラー
等で破泡しながら転圧するのが最も効果的である。In order to break the bubbles on the surface of lightweight aerated concrete,
Antifoaming agents can be applied, sprayed, or dropped while the lightweight aerated concrete still has fluidity, but in order to achieve a uniform surface finish after the foam breaks, it is necessary to apply the antifoaming agent when the cement has gelled a little and the fluidity of the lightweight aerated concrete has decreased. It is most effective to apply, spray or drop the antifoaming agent at the point where it is lost, and to roll it under pressure while breaking the bubbles with a trowel, spatula, brush or roller.
この時、消泡剤を塗布、噴霧又は滴下した後に、乾いた
砂等を散布すると、ベタツキがなくなり、作業性の面か
らも有効な手段である。At this time, spraying dry sand or the like after applying, spraying or dropping the antifoaming agent eliminates stickiness and is an effective means from the viewpoint of workability.
軽量気泡コンクリート表面の破泡の程度は、目的に応じ
て破泡すればよいが、表面から２〜３ ｃｍの厚さで破
泡すれば強固な面が得られる。The degree of foam rupture on the surface of lightweight cellular concrete may depend on the purpose, but a strong surface can be obtained if the foam is ruptured at a thickness of 2 to 3 cm from the surface.
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 explained in more detail with reference to Examples.
尚、実施例中に記載の部及び％は重量基準である。Incidentally, parts and percentages described in the examples are based on weight.
実施例１
急硬性セメント１００部、粉末珪石１００部及び凝結調
節剤０．３部に水１００部を混入攪拌してスラリーを製
造した。Example 1 100 parts of water was mixed with 100 parts of rapid hardening cement, 100 parts of powdered silica stone, and 0.3 parts of a setting regulator and stirred to prepare a slurry.
該スラリーに対し起泡剤（ハマノ工業社製フォーミック
スＣＩＩ） １部を添加して気泡を混入し、容重０．
７２ ｇ ／ｃｃの軽量気泡コンクリートを製造し、１
６Ｘ１６Ｘ１６ｃｍ型枠に流し込んだ。該軽量（東芝シ
リコン社製ＴＳＡ−７７０）１％溶液３ｇをスプレーに
より噴霧し、表面をヘラでなでながら、破泡し、約３Ｃ
Ｏ１低（した。To the slurry, 1 part of a foaming agent (Formix CII manufactured by Hamano Kogyo Co., Ltd.) was added to mix air bubbles, and the volume was reduced to 0.
72 g/cc lightweight aerated concrete was produced and 1
It was poured into a 6x16x16cm formwork. Spray 3 g of the lightweight (TSA-770, manufactured by Toshiba Silicon Co., Ltd.) 1% solution and stroke the surface with a spatula to break the bubbles and leave about 3C.
O1 low (did.
７時間後、オートクレーブに移し、昇温速度４０℃／ｈ
ｒ最高圧力１０ｋｇ／ｃ＋Ｊ、温度１８０℃で８時間蒸
気養生を行なった。蒸気養生直後、圧縮強度を測定した
ところ５２ ｋｇｆ／ＣｆＡであった。After 7 hours, transfer to an autoclave and increase temperature at 40°C/h.
Steam curing was performed for 8 hours at a maximum pressure of 10 kg/c+J and a temperature of 180°C. Immediately after steam curing, the compressive strength was measured and found to be 52 kgf/CfA.
この軽量気泡コンクリートの表面強度を調べるために、
直径６ｃＩ１１、重さ４００ｇの硬球を５０ｃｍの高さ
から繰り返し落下させたところ、第１表に示すように、
試験１ｌｋＬ１〜３の平均は１１回の硬球落下でひびわ
れが発生した。In order to investigate the surface strength of this lightweight aerated concrete,
When a hard ball with a diameter of 6cI11 and a weight of 400g was repeatedly dropped from a height of 50cm, as shown in Table 1,
On average for Test 1lkL1-3, cracks occurred after 11 hard balls were dropped.
また、比較のため、消泡剤を噴霧しないで、そのかわり
にセメントモルタルを厚さ３〔にコテ塗りした以外は全
く同じ条件で製造した軽量気泡コンクリートの表面強度
は、第１表に示すように、試験隘４〜６の平均２回の硬
球落下でひびわれが発生した。For comparison, the surface strength of lightweight aerated concrete produced under exactly the same conditions except that no antifoaming agent was sprayed and instead cement mortar was troweled to a thickness of 3 [thickness] was as shown in Table 1. In addition, cracks occurred when the hard ball was dropped an average of two times in test areas 4 to 6.
また、接着面からセメントモルタルが剥落した。In addition, the cement mortar peeled off from the adhesive surface.
第１表
※ 直径６Ｃ１１、重さ４００ｇの硬球を５０ｃ１１１
の高さから繰り返し落下させ、ひび割れ発生までの硬球
落下回数で表面強度を示した。Table 1 * A hard ball with a diameter of 6C11 and a weight of 400g is 50c111.
The surface strength was measured by the number of times a hard ball was dropped until cracks appeared.
実施例２
実施例１で製造した軽量気泡コンクリートを系消泡剤と
してポリプロピレングリコール１％溶液、（東邦化学工
業社製プロナール５０２）Ｉｇを軽量気泡コンクリート
表面に刷毛塗り（試験魚７〜９）、噴ｍ（試験ＮＩＩＬ
１０〜１２）及び滴下（試験阻１３〜１５）した後、表
面をヘラでなでながら破泡し、約３３低くした。以下、
実施例１と同様に試験を行なった。試験結果を第２表に
示す。Example 2 A 1% solution of polypropylene glycol (pronal 502 manufactured by Toho Chemical Industry Co., Ltd.) Ig was applied with a brush to the surface of the lightweight aerated concrete (test fish 7 to 9) using the lightweight aerated concrete produced in Example 1 as a defoaming agent. injection m (test NIIL
10 to 12) and dropping (test samples 13 to 15), the foam was broken by stroking the surface with a spatula to lower the temperature to about 33. below,
The test was conducted in the same manner as in Example 1. The test results are shown in Table 2.
第２表
〔発明の効果〕
本発明の軽量気泡コンクリートの表面強度増大法によれ
ば、コンクリートの表面強度が著しく増大するため、表
面が欠けたり、くずれたり、又は傷ついたすせず、しか
も従来の様な保護モルタルとの接着面がないため、表面
剥落はない。Table 2 [Effects of the Invention] According to the method for increasing the surface strength of lightweight cellular concrete of the present invention, the surface strength of concrete is significantly increased. There is no surface peeling because there is no adhesive surface with protective mortar such as.
Claims (1)
を塗布、噴霧又は滴下し、破泡させることを特徴とする
軽量気泡コンクリートの表面強度増大法。A method for increasing the surface strength of lightweight cellular concrete, which is characterized by coating, spraying or dropping an antifoaming agent on the surface of lightweight cellular concrete in an uncured state to break the bubbles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25389387A JPH0197605A (en) | 1987-10-09 | 1987-10-09 | Method of enhancing surface strength of lightweight foamed concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25389387A JPH0197605A (en) | 1987-10-09 | 1987-10-09 | Method of enhancing surface strength of lightweight foamed concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0197605A true JPH0197605A (en) | 1989-04-17 |
Family
ID=17257564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25389387A Pending JPH0197605A (en) | 1987-10-09 | 1987-10-09 | Method of enhancing surface strength of lightweight foamed concrete |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0197605A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2013057753A1 (en) * | 2011-10-18 | 2015-04-02 | トヨタ自動車株式会社 | High pressure gas tank manufacturing method and manufacturing apparatus thereof |
| JP2016183075A (en) * | 2015-03-26 | 2016-10-20 | 住友大阪セメント株式会社 | Method for production of porous concrete |
-
1987
- 1987-10-09 JP JP25389387A patent/JPH0197605A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2013057753A1 (en) * | 2011-10-18 | 2015-04-02 | トヨタ自動車株式会社 | High pressure gas tank manufacturing method and manufacturing apparatus thereof |
| US9233489B2 (en) | 2011-10-18 | 2016-01-12 | Toyota Jidosha Kabushiki Kaisha | Manufacturing method and manufacturing apparatus of high-pressure gas tank |
| JP2016183075A (en) * | 2015-03-26 | 2016-10-20 | 住友大阪セメント株式会社 | Method for production of porous concrete |
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