JPH0212911B2 - - Google Patents
Info
- Publication number
- JPH0212911B2 JPH0212911B2 JP20428286A JP20428286A JPH0212911B2 JP H0212911 B2 JPH0212911 B2 JP H0212911B2 JP 20428286 A JP20428286 A JP 20428286A JP 20428286 A JP20428286 A JP 20428286A JP H0212911 B2 JPH0212911 B2 JP H0212911B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- lightweight
- hardening
- mortar
- hardening accelerator
- 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
Links
- 239000004570 mortar (masonry) Substances 0.000 claims description 21
- 239000000203 mixture Substances 0.000 claims description 12
- 229940037003 alum Drugs 0.000 claims description 8
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 7
- 239000000920 calcium hydroxide Substances 0.000 claims description 7
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 7
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 7
- 239000004575 stone Substances 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052925 anhydrite Inorganic materials 0.000 claims description 5
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 5
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 claims description 3
- 239000011398 Portland cement Substances 0.000 claims description 3
- 239000002270 dispersing agent Substances 0.000 claims description 3
- 239000002562 thickening agent Substances 0.000 claims description 3
- 239000003607 modifier Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 description 9
- 238000009472 formulation Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000002156 mixing Methods 0.000 description 6
- 239000004568 cement Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000010451 perlite Substances 0.000 description 4
- 235000019362 perlite Nutrition 0.000 description 4
- 239000004567 concrete Substances 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 229910000288 alkali metal carbonate Inorganic materials 0.000 description 2
- 150000008041 alkali metal carbonates Chemical class 0.000 description 2
- 235000011126 aluminium potassium sulphate Nutrition 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005562 fading Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- GJPYYNMJTJNYTO-UHFFFAOYSA-J sodium aluminium sulfate Chemical compound [Na+].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GJPYYNMJTJNYTO-UHFFFAOYSA-J 0.000 description 2
- 235000011127 sodium aluminium sulphate Nutrition 0.000 description 2
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 239000001856 Ethyl cellulose Substances 0.000 description 1
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
- 241000221535 Pucciniales Species 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 229910052782 aluminium Inorganic materials 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
- 239000002585 base Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 150000001860 citric acid derivatives Chemical class 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 235000019325 ethyl cellulose Nutrition 0.000 description 1
- 229920001249 ethyl cellulose Polymers 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 235000010981 methylcellulose Nutrition 0.000 description 1
- KVBGVZZKJNLNJU-UHFFFAOYSA-M naphthalene-2-sulfonate Chemical compound C1=CC=CC2=CC(S(=O)(=O)[O-])=CC=C21 KVBGVZZKJNLNJU-UHFFFAOYSA-M 0.000 description 1
- 239000005332 obsidian Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 229940072033 potash Drugs 0.000 description 1
- GRLPQNLYRHEGIJ-UHFFFAOYSA-J potassium aluminium sulfate Chemical compound [Al+3].[K+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GRLPQNLYRHEGIJ-UHFFFAOYSA-J 0.000 description 1
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 1
- 239000008262 pumice Substances 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229910001388 sodium aluminate Inorganic materials 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
- HVTHJRMZXBWFNE-UHFFFAOYSA-J sodium zincate Chemical compound [OH-].[OH-].[OH-].[OH-].[Na+].[Na+].[Zn+2] HVTHJRMZXBWFNE-UHFFFAOYSA-J 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 150000003892 tartrate salts Chemical class 0.000 description 1
- 239000010455 vermiculite Substances 0.000 description 1
- 229910052902 vermiculite Inorganic materials 0.000 description 1
- 235000019354 vermiculite Nutrition 0.000 description 1
Landscapes
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Working Measures On Existing Buildindgs (AREA)
Description
イ 産業上の利用分野
本発明は、軽量部材やその補修材として用いる
軽量モルタルに関するものである。
ロ 従来技術
従来の軽量モルタルは、硬化時間が長くしかも
硬化するまでに沈降または収縮現象を起こし、ク
ラツクの発生を生じていた。特に、従来の軽量モ
ルタルを軽量コンクリート等軽量部材の補修に使
用する場合には、その補修箇所の吸水処理がより
十分でないと、下地材の吸水による補修モルタル
の「ヤセ」による亀裂がモルタル自体に発生す
る。この「ヤセ」現象は、場合によつては数％も
の長さ変化を示す場合がある。このために、軽量
モルタルに代えて通常の水和性膨張材を使用して
前記亀裂の防止を行おうとする試みがあるが、そ
の場合には膨張材を大量に使用しなくてはなら
ず、加えて後日に影響を及ぼす未水和の膨張材が
残る欠点もある。
特に、オートクレーブ養生した軽量コンクリー
ト（ALC）パネルの取り付け用フツクボルト穴
を「ヤセ」現象を生ずることなく、一度の充填作
業で仕上げる充填補修材は、その出現を強く待ち
望まれていたが、今日に至るも未だその出現は皆
無の状態である。
一方硬化時間を短縮する目的で、硬化促進剤と
して例えば塩化カルシユームを加えて硬化を早め
ることも行われているが、補強鉄筋の錆の問題や
乾燥後ひび割れを起こす等の問題があり、又硬化
速度も十分でない欠点があつた。
更に急結剤、例えばアルミン酸ソーダを使用す
ると、添加量の変動により凝結時間、初期強度が
急変する上に、凝結が早過ぎて作業が困難であ
り、ねり殺しにより強度劣化などの問題があつ
た。又〓焼ミヨウバン石と水硬性石コウによるセ
メントの凝結硬化促進方法（特公昭51−47169号）
は、その促進効果が十分でなく、〓焼ミヨウバン
石、消石灰およびアルカリ金属の炭酸塩を用いた
方法（特開昭61−31371号）は、ねり殺しによる
強度劣化の問題や、硬化促進剤の成分であるアル
カリ金属の炭酸塩や消石灰の質や、それらの量に
よつては、硬化速度が大きく変動する問題があ
る。
ハ 発明が解決しようとする問題点
従つて、上記のように従来の軽量モルタルは
「ヤセ」、補強鉄筋の錆、硬化時間の短縮効果が不
十分、作業性の困難さ、強度劣化、硬化速度が大
きく変動する等の数多くの問題点があつた。そこ
で本発明者らは、これらの問題を解決すべく、軽
量モルタルの打設及び補修ならびに充填などの作
業性を良好にし、３分以上任意の時間に凝結硬化
し、更に終結（JISビカー針テスト）の時間内で
のねり殺しであれば、その終結時間に、ほとんど
影響を及ぼさない軽量モルタルを提供することを
目的とした。
ニ 問題を解決するための手段
本発明は前記問題点に着目してなされたもの
で、その要点は〓焼ミヨウバン石を基本とする硬
化促進剤に金属アルミ粉末を組合せ使用すること
により、軽量モルタルの作業性がよく、十分なる
凝結促進と長期強度を増進し、かつ収縮を原因と
する亀裂を解消することにある。
かかる目的を達成する本発明の構成は、次の通
りである。即ち軽量骨材としては、目的とする軽
量モルタルの嵩比重に応じてその量を加減する。
軽量骨材の例として、パーライト（黒曜岩系、真
珠岩系）、〓焼ひる石、抗火石、その他の天然軽
石、並びにALCの破砕物などが使用できる。ポ
ルトランドセメントは、普通、白色、早強などの
各種ポルトランドセメントが使用できる。その配
合量は、所要強度や嵩比重によつて異なるが、50
〜80重量％が好ましい量である。硬化促進剤は〓
焼ミヨウバン石30〜70重量％、消石灰20〜70重量
％、亜硝酸塩３〜10重量％及び型無水石コウ又
は半水石コウ１〜３重量％よりなり、その配合量
は３〜20重量％が好ましい。この硬化促進の特徴
は、凝結硬化の促進のみならず初期強度の増進お
よび長期強度を損なわないことである。増粘剤と
しては、メチルセルロース、ポリエチレンオキサ
ド、エチルセルロース等が用いられる。その配合
料は、0.1〜0.2重量％が好ましい。分散剤として
は、メラミンスルホン酸塩、βナフタリンスルホ
ン酸塩等が使用できる。その配合量は、0.05〜
0.60重量％が好ましい。凝結調整剤としては、必
要に応じてクエン酸塩、酒石酸塩等のオキシカル
ボン酸の塩が使用できる。その配合量は、0.05〜
0.20重量％が好ましい。更に軽量モルタルの性質
によつて鉱物質の粉末及び繊維類を加えることが
できる。その鉱物質の粉末としては、珪石、高炉
スラグ、転炉スラグ、フライアツシユ、及びシリ
カヒユーム、天然ポゾランや着色のための顔料な
どがある。その配合量は、２〜40重量％が好まし
い。
尚上記の〓焼ミヨウバン石とは、例えば我が国
において産出するカリミヨウバン石とソーダミヨ
ウバン石が混合したカリ・ソーダミヨウバン石を
600〜700℃程度に〓焼したものを所定の粉末度
（BL′値＝4000cm2／ｇ程度）に粉砕したものであ
る。
ホ 作 用
本発明による軽量モルタルは、水比0.35〜0.70
で水を加え混練すると、水比およびセメント量並
びに硬化促進剤量に応じて、３分以上任意の時間
に凝結をすることができる。これはセメント成分
と硬化剤成分とが反応した結果、ヒドロスルホア
ルミン酸カルシウム（いわゆるエトリンジヤイト
の形成）による硬化促進と考えられる。又混合さ
れたアルミ粉末がアルカリ成分と反応することに
よつて、強力な膨張作用を示し亀裂を防ぐのであ
る。そしてモルタルの練り殺しをしてもほぼ正常
な凝結の終結を示し、強度も損なわれることがな
いという大きな特徴がある。おそらくこの現象は
アルミ粉末が徐々に反応し、その反応物が凝結に
作用することにより、ほぼ正常な終結を示すもの
と考えられる。
ヘ 発明の効果
本発明による軽量モルタルは、従来の軽量モル
タルにはかつて見られなかつた特徴として任意の
硬化時間と殆ど問題にならない極めて僅かな収縮
性、及び練り殺しをしても凝結が正常な終結を示
すなどの大きな特徴がある。これらの大きな特徴
により、ALCパネルの割れ、欠けに対する一般
的補修材、並びにパネル取り付け用フツクボルト
の穴埋め用充填補修材として使用が可能なばかり
でなく、さらにPC部材の軽量素材として利用す
ることが可能である。ここに任意の硬化時間と
は、硬化促進剤を構成する〓焼ミヨウバン石、消
石灰、亜硝酸塩及び型無水石コウ又は半水石コ
ウの混合割合を変更することで硬化時間を任意時
間に変更することができることを意味する。
ト 実施例
実施例 １
表−１に示す配合物を各々水比50％になるよう
に水を加え、モルタルミキサーで混合しその練り
上がつたモルタルの硬化時間、可使時間、材令
1d、28dの圧縮強度及び収縮率を測定した。この
結果は、表−２に示され、それによると、硬化促
進剤を用いた配合２〜４は硬化時間が短縮され、
初期強度も大きく、しかもほとんど収縮しないこ
とがわかる。
B. Field of Industrial Application The present invention relates to lightweight mortar used as lightweight members and their repair materials. B. Prior Art Conventional lightweight mortar takes a long time to harden and also causes settling or shrinkage before hardening, resulting in cracks. In particular, when using conventional lightweight mortar to repair lightweight components such as lightweight concrete, if the water absorption treatment of the repaired area is not sufficient, cracks may occur in the mortar itself due to "sagging" of the repaired mortar due to water absorption by the base material. Occur. This "fading" phenomenon may show a change in length of several percent in some cases. For this reason, attempts have been made to prevent the above cracks by using a normal hydratable expanding material instead of lightweight mortar, but in that case, a large amount of expanding material must be used. In addition, there is also the disadvantage that unhydrated swelling material remains which will have an effect later on. In particular, the appearance of a filling repair material that can finish the hook bolt holes for attaching autoclave-cured lightweight concrete (ALC) panels in a single filling operation without causing the "fading" phenomenon has been eagerly awaited, but to date However, it has not yet appeared. On the other hand, in order to shorten the curing time, hardening has been accelerated by adding calcium chloride as a hardening accelerator, but this has problems such as rusting of reinforcing bars and cracking after drying. It also had the drawback of not being fast enough. Furthermore, if an accelerating agent such as sodium aluminate is used, the setting time and initial strength will change rapidly due to changes in the amount added, and the setting will be too rapid, making work difficult, and there will be problems such as strength deterioration due to stiffness. Ta. Also: Method for accelerating setting and hardening of cement using calcined alum stone and hydraulic plaster (Special Publication No. 51-47169)
However, the method using calcined alum, slaked lime, and alkali metal carbonate (Japanese Patent Application Laid-open No. 31371/1983) has problems with strength deterioration due to pounding and problems with hardening accelerators. There is a problem in that the curing speed varies greatly depending on the quality and amount of the alkali metal carbonate and slaked lime that are the ingredients. C. Problems to be Solved by the Invention Therefore, as mentioned above, conventional lightweight mortar "fades", rusts on reinforcing bars, insufficient effect in shortening hardening time, difficulty in workability, strength deterioration, and hardening speed. There were many problems such as large fluctuations in the Therefore, in order to solve these problems, the present inventors improved the workability of placing, repairing, and filling lightweight mortar, allowed it to set and harden in any time of 3 minutes or more, and further completed (JIS Vicat needle test) ) The aim is to provide a lightweight mortar that has almost no effect on the completion time of the kneading process. D. Means for Solving the Problems The present invention has been made by focusing on the above-mentioned problems. It has good workability, promotes sufficient setting and long-term strength, and eliminates cracks caused by shrinkage. The structure of the present invention that achieves this object is as follows. That is, the amount of lightweight aggregate is adjusted depending on the bulk specific gravity of the intended lightweight mortar.
Examples of lightweight aggregates that can be used include perlite (obsidian type, perlite type), calcined vermiculite, anti-firestone, other natural pumice stones, and crushed ALC. Various types of Portland cement can be used, such as ordinary, white, and early-strength Portland cement. The blending amount varies depending on the required strength and bulk specific gravity, but 50
~80% by weight is the preferred amount. The curing accelerator is
It consists of 30-70% by weight of burnt alum, 20-70% by weight of slaked lime, 3-10% by weight of nitrite, and 1-3% by weight of type anhydrite or hemihydrate, and the blending amount is 3-20% by weight. preferable. The feature of this hardening acceleration is that it not only accelerates setting and hardening but also increases initial strength and does not impair long-term strength. As the thickener, methyl cellulose, polyethylene oxide, ethyl cellulose, etc. are used. The compounding amount is preferably 0.1 to 0.2% by weight. As the dispersant, melamine sulfonate, β-naphthalene sulfonate, etc. can be used. Its blending amount is 0.05~
0.60% by weight is preferred. As the setting modifier, salts of oxycarboxylic acids such as citrates and tartrates can be used as required. Its blending amount is 0.05~
0.20% by weight is preferred. Furthermore, depending on the nature of the lightweight mortar, mineral powders and fibers can be added. The mineral powders include silica, blast furnace slag, converter slag, fly ash, silica hume, natural pozzolan, and pigments for coloring. The blending amount is preferably 2 to 40% by weight. Incidentally, the above-mentioned burnt alum stone refers to potash/soda alum stone, which is a mixture of potash alum stone and soda alum stone produced in Japan, for example.
It is calcined at about 600 to 700°C and pulverized to a predetermined powder degree (BL' value=about 4000 cm 2 /g). The lightweight mortar according to the present invention has a water ratio of 0.35 to 0.70.
When water is added and kneaded, the mixture can be set for any time of 3 minutes or more, depending on the water ratio, amount of cement, and amount of hardening accelerator. This is considered to be due to the reaction between the cement component and the hardening agent component, which accelerates hardening due to calcium hydrosulfoaluminate (formation of so-called ettringite). In addition, the mixed aluminum powder reacts with the alkaline component, exhibiting a strong expansion effect and preventing cracks. Another major feature is that even if the mortar is kneaded to death, it shows almost normal coagulation and does not lose its strength. This phenomenon is probably due to the gradual reaction of the aluminum powder and the reaction product acting on the coagulation, resulting in a nearly normal conclusion. F. Effects of the Invention The lightweight mortar of the present invention has features that have never been seen in conventional lightweight mortars, such as extremely slight shrinkage that hardly causes any problems with any hardening time, and normal setting even after kneading. It has major characteristics such as indicating the end. Due to these major features, it can be used not only as a general repair material for cracks and chips in ALC panels, and as a filler repair material for filling holes in panel mounting hook bolts, but also as a lightweight material for PC components. It is. Here, the arbitrary curing time means that the curing time can be changed to an arbitrary time by changing the mixing ratio of calcined alum, slaked lime, nitrite, and type anhydrite or hemihydrate that constitute the curing accelerator. It means that you can. Example Example 1 Water was added to each of the formulations shown in Table 1 so that the water ratio was 50%, and the mixture was mixed in a mortar mixer.
The compressive strength and shrinkage rate at 1d and 28d were measured. The results are shown in Table 2, which shows that formulations 2 to 4 using a curing accelerator shortened the curing time;
It can be seen that the initial strength is high and there is almost no shrinkage.
【表】【table】
【表】
尚この配合に使用した材料は白色セメント−小
野田セメント製、パーライト(A)−三井金属製、パ
ーライト(D)−昭和化学製、アルミ粉末−大和アル
ミ製、マポローズ（増粘剤）−松本油脂製、メル
メント（分散剤）−昭和電工製、を各々使用した。
又この時に用いた硬化促進剤は、〓焼ミヨウバン
石64重量％、消石灰30重量％、亜硝酸ソーダ５重
量％、型無水石コウ１重量％よりなるものであ
る。
実施例 ２
表−３に示す実施配合と比較配合とで各々水比
50％でハンドミキサー（東芝製）を用いて混練し
た。この軽量モルタルを軽量気泡コンクリート
（小野田エー、エル、シー製ALC）に径10cmφ、
深さ２cmの穴をあけ、この穴に予め酢酸ビニール
エマルジヨン液を10倍に希釈した液を塗り、乾燥
した後にこの穴に埋め込み盛り上げた。その結
果、実施配合のモルタルは、15分後に硬化し、30
分後にナイフで平らに削り仕上げすることができ
た。後日、仕上げたモルタル面を観察したが、亀
裂はなく、非常によく一体化されていた。一方、
比較配合は、８時間程度で硬化し、後日の観察で
も亀裂や沈下が観察された。
尚この実施配合に用いた硬化促進剤は、〓焼ミ
ヨウバン石74重量％、消石灰20重量％、亜鉛酸ソ
ーダ５重量％、型無水石コウ１重量％よりなる
ものである。[Table] The materials used in this formulation are white cement - manufactured by Onoda Cement, perlite (A) - manufactured by Mitsui Kinzoku, perlite (D) - manufactured by Showa Kagaku, aluminum powder - manufactured by Daiwa Aluminum, Maporose (thickener) - Matsumoto Yushi Co., Ltd. and Melment (dispersant) - Showa Denko Co., Ltd. were used.
The hardening accelerator used at this time consisted of 64% by weight of calcined alum, 30% by weight of slaked lime, 5% by weight of sodium nitrite, and 1% by weight of type anhydrite. Example 2 The water ratio of the practical formulation and comparative formulation shown in Table 3
It was mixed at 50% using a hand mixer (manufactured by Toshiba). This lightweight mortar is applied to lightweight aerated concrete (ALC manufactured by Onoda A, L, C) with a diameter of 10 cmφ.
A hole with a depth of 2 cm was made, and a 10-fold diluted vinyl acetate emulsion solution was applied to the hole, and after drying, it was filled into the hole and raised. As a result, the mortar with the working formulation hardened after 15 minutes and after 30 minutes.
After a few minutes, I was able to scrape it flat with a knife. Later, when I observed the finished mortar surface, there were no cracks and it was very well integrated. on the other hand,
The comparative formulation cured in about 8 hours, and cracks and subsidence were observed even when observed at a later date. The hardening accelerator used in this practical formulation consisted of 74% by weight of calcined alum, 20% by weight of slaked lime, 5% by weight of sodium zincate, and 1% by weight of type anhydrite.
Claims (1)
促進剤、増粘剤、分散剤、必要に応じて凝結調整
剤を加えた軽量モルタルにおいて、前記硬化促進
剤として、〓焼ミヨウバン石30〜70重量％、消石
灰20〜70重量％、亜硝酸塩３〜10重量％、及び
型無水石コウ又は半水石コウ１〜３重量％を混合
してなる混合物を用い、その硬化促進剤を３〜20
重量％添加すると共に、アルミ粉末を0.01〜0.03
重量％添加したことを特徴とする軽量モルタル。1. In a lightweight mortar containing a lightweight aggregate, Portland cement, a hardening accelerator, a thickener, a dispersant, and if necessary a setting modifier, as the hardening accelerator, 30 to 70% by weight of calcined alum stone, A mixture of 20 to 70% by weight of slaked lime, 3 to 10% by weight of nitrite, and 1 to 3% by weight of type anhydrite or hemihydrate is used, and 3 to 20% of the hardening accelerator is used.
Add aluminum powder at 0.01 to 0.03% by weight
A lightweight mortar characterized by the addition of % by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20428286A JPS6360175A (en) | 1986-08-29 | 1986-08-29 | Lightweight mortar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20428286A JPS6360175A (en) | 1986-08-29 | 1986-08-29 | Lightweight mortar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6360175A JPS6360175A (en) | 1988-03-16 |
| JPH0212911B2 true JPH0212911B2 (en) | 1990-03-29 |
Family
ID=16487900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20428286A Granted JPS6360175A (en) | 1986-08-29 | 1986-08-29 | Lightweight mortar |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6360175A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0948648A (en) * | 1995-08-07 | 1997-02-18 | Sumitomo Metal Mining Co Ltd | Repairing mortar |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0676693B2 (en) * | 1988-07-19 | 1994-09-28 | 不動建設株式会社 | Lightweight embankment material for underwater construction |
| JP2711240B2 (en) * | 1995-12-28 | 1998-02-10 | ナカ工業株式会社 | Floor panel |
| DE102005033454A1 (en) * | 2005-07-18 | 2007-01-25 | Construction Research & Technology Gmbh | Use of an organic additive for the production of aerated concrete |
-
1986
- 1986-08-29 JP JP20428286A patent/JPS6360175A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0948648A (en) * | 1995-08-07 | 1997-02-18 | Sumitomo Metal Mining Co Ltd | Repairing mortar |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6360175A (en) | 1988-03-16 |
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