JP2803561B2 - Lightweight concrete product and method of manufacturing the same - Google Patents

Lightweight concrete product and method of manufacturing the same

Info

Publication number
JP2803561B2
JP2803561B2 JP6043028A JP4302894A JP2803561B2 JP 2803561 B2 JP2803561 B2 JP 2803561B2 JP 6043028 A JP6043028 A JP 6043028A JP 4302894 A JP4302894 A JP 4302894A JP 2803561 B2 JP2803561 B2 JP 2803561B2
Authority
JP
Japan
Prior art keywords
weight
cured
quicklime
cement
cao
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 - Lifetime
Application number
JP6043028A
Other languages
Japanese (ja)
Other versions
JPH07101787A (en
Inventor
道子 川上
純夫 柴田
孝次 川本
博 深谷
豊 古川
Original Assignee
住友金属鉱山株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to JP5-151107 priority Critical
Priority to JP15110793 priority
Application filed by 住友金属鉱山株式会社 filed Critical 住友金属鉱山株式会社
Priority to JP6043028A priority patent/JP2803561B2/en
Publication of JPH07101787A publication Critical patent/JPH07101787A/en
Application granted granted Critical
Publication of JP2803561B2 publication Critical patent/JP2803561B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【0001】[0001]
【産業上の利用分野】本発明は軽量で高強度のコンクリ
ート製品及びその製造方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lightweight and high-strength concrete product and a method for producing the same.
【0002】[0002]
【従来の技術】水蒸気養生軽量気泡コンクリート(AL
C)は、かさ比重0.5〜0.6程度で圧縮強度40〜5
0kg/cm2のものが建築物の床材、壁材、外壁材と
して一般に用いられている。建物の外壁は、風圧に耐え
る必要があり、例えば20階では対風圧強度は計算上6
00kg/cm2程度であることが必要で、これを考慮
すると、圧縮強度200kg/cm2以上のものが必要
とされる。このため、ALCは外壁材としては、圧縮強
度の点から9階建てまでの中低層の建物に用いられる。
これ以上の高層階には、圧縮強度が300kg/cm2
の軽量骨材を用いた一種人工軽量コンクリート材を基材
とするプレキャストコンクリートカーテンウォール(P
CCW)が用いられている。しかし、このPCCWはか
さ比重が1.8〜2.2である。この場合、建物全体に占
める壁の重さが30〜40重量%となる。壁材として上
記強度を有しつつ、かさ比重の小さいものが得られれば
建物を従来より安価に建設出来る。
2. Description of the Related Art Steam-cured lightweight cellular concrete (AL)
C) has a bulk specific gravity of about 0.5 to 0.6 and a compressive strength of 40 to 5
A material having a weight of 0 kg / cm 2 is generally used as a floor material, a wall material, and an outer wall material of a building. The outer wall of the building must withstand wind pressure.
It requires a 00kg / cm 2 or so, considering this is required that the compression strength 200 kg / cm 2 or more. For this reason, ALC is used as an outer wall material for low-rise buildings of 9 stories from the point of compressive strength.
For higher floors higher than this, the compressive strength is 300 kg / cm 2
Precast concrete curtain wall (P type) made of a kind of artificial lightweight concrete using lightweight aggregate
CCW) is used. However, this PCCW has a bulk specific gravity of 1.8 to 2.2. In this case, the weight of the wall occupying the whole building is 30 to 40% by weight. If a material having the above strength and a small bulk specific gravity can be obtained as a wall material, a building can be constructed at lower cost than before.
【0003】[0003]
【発明が解決しようとする課題】本発明はかさ比重がP
CCWより小さく0.7〜1.5で圧縮強度200kg/
cm2以上のコンクリート製品を提供することを課題と
する。又、製造する製品の寸法を大きくし、補強用鉄筋
を配筋した場合に、原料スラリーの注入から硬化までの
間に亀裂の発生を防止出来る軽量コンクリート製品の製
造方法を提供することである。
SUMMARY OF THE INVENTION The present invention has a bulk specific gravity of P
0.7 to 1.5 smaller than CCW and compressive strength 200kg /
An object of the present invention is to provide a concrete product of cm 2 or more. Another object of the present invention is to provide a method of manufacturing a lightweight concrete product which can prevent cracks from being injected to hardening of a raw material slurry when the size of a product to be manufactured is increased and reinforcing bars are arranged.
【0004】[0004]
【課題を解決するための手段】本発明は、CaO/Si
2モル比が0.35〜1.2で、トバモライトとケイ酸
カルシウム水和物を主体とし細孔直径が100μm以下
で細孔容積が35〜70%であり、かさ比重が0.7〜
1.5、圧縮強度200kg/cm2以上である軽量コン
クリート製品。
SUMMARY OF THE INVENTION The present invention provides a CaO / Si
O 2 molar ratio is 0.35 to 1.2, mainly composed of tobermorite and calcium silicate hydrate, pore diameter is 100 μm or less, pore volume is 35 to 70%, and bulk specific gravity is 0.7 to
1.5. Lightweight concrete products with a compressive strength of 200 kg / cm 2 or more.
【0005】及びケイ酸質原料粉末と、セメントと消石
灰又は生石灰を含む石灰質原料粉末とを、CaO/Si
2モル比が0.35〜1.2、セメントは全固形分中6
〜20重量%、生石灰と消石灰又は生石灰のうちの生石
灰を、CaO換算で計算して100重量%−5×(セメ
ント重量%)=Y重量%以上となるように配合し、該配
合粉末100重量部当たり50〜80重量部の水を加え
て混合し発泡剤を含有しないスラリーを形成し、このス
ラリーを型枠内に注入して硬化させ、該硬化体を高温高
圧水蒸気養生する軽量コンクリート製品の製造方法にあ
る。
[0005] A siliceous raw material powder, and a calcareous raw material powder containing cement and slaked lime or quick lime are mixed with CaO / Si
O 2 molar ratio 0.35 to 1.2, cement is 6% of total solids
-20% by weight, quicklime and slaked lime or quicklime among quicklime are blended so as to be 100% by weight-5 × (cement% by weight) = Y% by weight or more in terms of CaO conversion. 50 to 80 parts by weight of water per part is added and mixed to form a slurry containing no foaming agent, and the slurry is poured into a mold and cured, and the cured product is cured with a high-temperature and high-pressure steam. In the manufacturing method.
【0006】[0006]
【作用】本発明コンクリート製品において、CaO/S
iO2モル比を0.35〜1.2とするのは、トバモライ
トとケイ酸カルシウム水和物を主体とするコンクリート
を構成するために必要であり、この両者が同時に存在す
る場合に所望の強度が得られるからである。トバモライ
ト以外の結晶が生成すると強度低下の原因となる。未反
応のケイ石や消石灰は少量であれば、含まれていても差
し支えない。
In the concrete product of the present invention, CaO / S
The iO 2 molar ratio of 0.35 to 1.2 is necessary to construct a concrete mainly composed of tobermorite and calcium silicate hydrate, and a desired strength is required when both are present at the same time. Is obtained. The generation of crystals other than tobermorite causes a decrease in strength. Unreacted silica and slaked lime may be contained in small amounts.
【0007】本発明コンクリート製品において、細孔直
径を100μm以下とするのは、細孔直径がこれより大
きいと、細孔容積を70%以下にすることが困難とな
り、圧縮強度を200kg/cm2以上とすることが出
来ないことによる。細孔容積を35%未満にすると圧縮
強度は大きく増加するが、かさ比重を1.5以下とする
ことが出来ないことによる。かさ比重が0.7未満では
圧縮強度を200kg/cm2以上に出来ないからであ
る。
In the concrete product of the present invention, the pore diameter is set to 100 μm or less. If the pore diameter is larger than this, it is difficult to reduce the pore volume to 70% or less, and the compressive strength is 200 kg / cm 2. This is due to the fact that the above cannot be done. When the pore volume is less than 35%, the compressive strength is greatly increased, but the bulk specific gravity cannot be reduced to 1.5 or less. If the bulk specific gravity is less than 0.7, the compressive strength cannot be increased to 200 kg / cm 2 or more.
【0008】本発明のコンクリート製品の製造方法にお
いて、CaO/SiO2モル比を0.35〜1.2とする
のは、トバモライトとケイ酸カルシウム水和物を主体と
するコンクリートが得られるようにするためである。
0.35未満では強度発現に寄与するトバモライトが生
成しにくくなり、1.2を超えるとトバモライトから強
度の低いゾノライトへの変化が起こり強度が低下するよ
うになる。又、この変化は比較的速やかな為、最適養生
時間の幅が狭くなり、この時間の制御が困難となるから
である。
In the method for producing a concrete product of the present invention, the CaO / SiO 2 molar ratio is set to 0.35 to 1.2 so as to obtain a concrete mainly composed of tobermorite and calcium silicate hydrate. To do that.
If it is less than 0.35, tobermorite which contributes to the development of strength is difficult to be produced, and if it exceeds 1.2, tobermorite changes to low-strength zonolite and the strength decreases. Further, since this change is relatively quick, the range of the optimum curing time is narrowed, and it becomes difficult to control this time.
【0009】本発明のコンクリート製品の製造方法にお
いて、セメントを少なくとも全固形分中6〜20重量%
となるようにするのは、6重量%未満では、オートクレ
ーブ養生前の硬化体の強度が低く壊れ易いため取り扱い
が困難となり、20重量%を超えると、得られたコンク
リート製品に欠けが生じ易くなるからである。
[0009] In the method for producing a concrete product of the present invention, the cement is used in an amount of at least 6 to 20% by weight of the total solid content.
When the content is less than 6% by weight, the cured product before curing in an autoclave is low in strength and easily broken due to low strength, and when the content exceeds 20% by weight, the obtained concrete product tends to be chipped. Because.
【0010】生石灰と消石灰又は生石灰のうちの生石灰
を、CaO換算で計算して100重量%−5×(セメン
ト重量%)=Y重量%以上となるように配合するのは、
生石灰がY重量%未満であると、原料スラリーの硬化中
に生ケーキに亀裂を生ずるからである。生石灰の使用量
をY重量%以上とし、CaO/SiO2モル比と、ポル
トランドセメントの使用比率によって決まる石灰質原料
粉末の使用量の上限まで生石灰を使用することが出来
る。生石灰の使用量を増加しても生ケーキの亀裂発生は
無いが、マイクロポアーが減少してかさ比重が増加す
る。更に生石灰の水和反応熱が増加して原料スラリー又
は硬化中の生ケーキ温度が上昇して、場合によっては1
00℃以上に達し、原料スラリー又は硬化中の生ケーキ
が突沸を起こして飛散することがある。この突沸に対し
て原料混練時の水の温度を下げる調整が必要となるし、
混練初期のスラリー温度を下げ過ぎると、スラリーがブ
リージングを起こし、水と固体が分離することがあるた
め、生石灰の使用量を必要最少限とするのが好ましい。
In order to mix quick lime and slaked lime or quick lime among quick limes in such a manner as to be 100% by weight−5 × (cement% by weight) = Y% by weight or more in terms of CaO,
This is because if the amount of quicklime is less than Y wt%, cracks occur in the raw cake during curing of the raw material slurry. The amount of quicklime is Y wt% or more, CaO / and SiO 2 molar ratio, it may be used quicklime to the upper limit of the amount of calcareous material powder determined by using the ratio of the Portland cement. Even if the amount of quicklime used is increased, there is no crack in the raw cake, but the micropores decrease and the bulk specific gravity increases. Further, the heat of hydration reaction of quicklime increases, and the temperature of raw slurry or raw cake during hardening increases, and in some cases, 1
When the temperature reaches 00 ° C. or higher, the raw slurry or the raw cake being cured may be bumped and scattered. For this bumping, it is necessary to adjust the temperature of water at the time of mixing the raw materials,
If the temperature of the slurry in the initial stage of kneading is excessively lowered, the slurry may cause breathing, and water and solids may be separated. Therefore, it is preferable that the amount of quicklime used is minimized.
【0011】本発明のコンクリート製品の製造方法にお
いて、配合粉末100重量部当たり50〜80重量部の
水を使用するのは、50重量部未満では、トバモライト
が充分に成長しないので、強度が得られず、トバモライ
トの生成により過剰となった反応に直接寄与しない水の
蒸発により形成される細孔の容積が少なくなってかさ比
重が本発明の範囲より大きくなるからである。又、80
重量部を超えると、スラリー中の固形分が沈降し易くな
り均一な硬化体が得られなくなるからである。
In the method for producing a concrete product of the present invention, 50 to 80 parts by weight of water is used per 100 parts by weight of the compounded powder. If the amount is less than 50 parts by weight, tobermorite does not grow sufficiently, so that strength is obtained. This is because the volume of pores formed by the evaporation of water that does not directly contribute to the excess reaction due to the generation of tobermorite decreases, and the bulk specific gravity becomes larger than the range of the present invention. Also, 80
If the amount exceeds the weight part, the solid content in the slurry tends to settle, and a uniform cured product cannot be obtained.
【0012】本発明のコンクリート製品の製造方法にお
いて、スラリーに発泡剤を含有せしめないのは、発泡剤
を含有せしめると、直径0.2mm以上の細孔や大きな
気孔が生じて製品強度が低下し所望強度の製品が得られ
なくなるからである。
In the method for producing a concrete product of the present invention, the reason why the foaming agent is not contained in the slurry is that when the foaming agent is contained, pores having a diameter of 0.2 mm or more and large pores are generated, and the product strength is reduced. This is because a product having the desired strength cannot be obtained.
【0013】本発明のコンクリート製品の製造方法にお
いては、スラリーの硬化時間を短縮するために、スラリ
ーの温度を30〜70℃とし、型枠に注入して所定時間
(50℃では約10時間)静置し、セメント水和物を生
成させて硬化させ、型枠から硬化体を取り出し、オート
クレーブに挿入し高温の飽和水蒸気をオートクレーブに
注入して徐々に加熱し、180〜190℃程度、約10
〜12気圧の水蒸気中に数〜数十時間保持し、セメント
水和物を繊維状のケイ酸カルシウム水和物(CSH)に
変化せしめると共に、その一部をトバモライトに変化せ
しめる。この時、CSHとトバモライトが適当な比率と
なった時に、強度が最大となる。トバモライトがゾノラ
イトに変化し始めると、強度が低下し始めるので、最適
な養生時間と温度は、配合に応じて実験により求めるの
がよい。
In the method for producing a concrete product of the present invention, in order to shorten the hardening time of the slurry, the temperature of the slurry is set to 30 to 70 ° C., and the slurry is poured into a mold for a predetermined time (about 10 hours at 50 ° C.). The mixture was allowed to stand, a cement hydrate was formed and cured, the cured product was taken out of the mold, inserted into an autoclave, and high-temperature saturated steam was injected into the autoclave and gradually heated.
It is kept in water vapor at 1212 atm for several to several tens of hours to convert cement hydrate to fibrous calcium silicate hydrate (CSH) and part of it to tobermorite. At this time, when CSH and tobermorite have an appropriate ratio, the strength becomes maximum. When tobermorite begins to change to zonolite, the strength begins to decrease, so the optimal curing time and temperature should be determined experimentally according to the formulation.
【0014】尚、原料配合物中に、ALCの配合の場合
と同様に石膏(CaSO4)を加えると、消石灰と同様
に固形分の沈降を防止する効果がある。しかし過剰に添
加すると硬化体の強度を低下させるので、外割りで7重
量%(内割りで6.5重量%)以下、通常内割りで3重
量%前後添加するのがよい。石膏は無水石膏、半水石
膏、二水石膏でもよい。
When gypsum (CaSO 4 ) is added to the raw material mixture in the same manner as in the case of ALC, there is an effect of preventing solid content from settling similarly to slaked lime. However, if added excessively, the strength of the cured product is reduced. Therefore, it is preferable to add 7% by weight (6.5% by weight in the inner part), usually about 3% by weight in the inner part. The gypsum may be anhydrous gypsum, hemihydrate gypsum or gypsum.
【0015】[0015]
【実施例】SiO2を22重量%,CaOを64重量%
含む普通ポルトランドセメントと、CaOを90重量%
含む生石灰と、CaOを75.8重量%含む消石灰と、
SiO2分93重量%で平均粒径20μm程度のケイ石
粉末と、これらの合計に対する3重量%の二水石膏を混
合し、これらの全原料粉に対して水を添加しスラリーと
して、このスラリーを40℃に加熱して離型剤を塗布し
鉄筋を配置しないJIS R5201のモルタル強度試
験用の10×10×40cmの型枠に注入し、湿度80
%、温度50℃の雰囲気で10時間置いて硬化させた。
この硬化体を脱型して圧縮強度を調べた。又、型枠に鉄
筋を配置したこと以外は上記と同様にして得られる硬化
体を脱型して亀裂の有無を調べた。
EXAMPLE 22% by weight of SiO 2 and 64% by weight of CaO
90% by weight of ordinary Portland cement containing CaO
Containing quicklime and slaked lime containing 75.8% by weight of CaO;
Silica powder having an SiO 2 content of 93% by weight and an average particle size of about 20 μm and gypsum dihydrate of 3% by weight based on the total thereof were mixed, and water was added to all of the raw material powders to form a slurry. Is heated to 40 ° C., a mold release agent is applied, and a reinforcing bar is not provided. The mold is poured into a 10 × 10 × 40 cm mold for mortar strength test according to JIS R5201, and a humidity of 80
% For 10 hours in a 50 ° C. atmosphere.
The cured product was removed from the mold and the compression strength was examined. Further, the cured product obtained in the same manner as described above except that the reinforcing bar was disposed on the mold was demolded and examined for cracks.
【0016】鉄筋を配置しない脱型した硬化体をオート
クレーブに入れ、水蒸気養生を所定時間行い、供試用コ
ンクリート片を得た。かさ比重は、供試片を105℃の
乾燥機中で重量が変化しなくなるまで置いてから求めた
重量から算出し、圧縮強度はJIS R5201(セメ
ントの物理試験法)の中に規定されている油圧式ベンジ
ュラムダイナモメーター圧縮試験機を用いて4×4cm
の面積に80kg/secの割合で荷重を掛けて行っ
た。細孔容積は供試片を軽く粉砕し、篩を用いて直径2
mm〜250μmに分級し、105℃の乾燥機に2時間
放置して乾燥させたものをデシケーター中で放冷したも
のを用い、水銀圧入法を用いて測定した。その製造条件
を表1に、製造結果を表2に示す。又、鉄筋を配置して
得られる製品の角の欠けの有無を調べた。
The demolded cured product without the reinforcing bar was placed in an autoclave and subjected to steam curing for a predetermined time to obtain a concrete piece for test. The bulk specific gravity is calculated from the weight obtained after placing the test piece in a dryer at 105 ° C. until the weight no longer changes, and the compressive strength is specified in JIS R5201 (physical test method for cement). 4 × 4cm using hydraulic bend ram dynamometer compression tester
Was applied at a rate of 80 kg / sec. The pore volume was determined by crushing the test piece lightly and
The particles were classified into mm to 250 μm, left standing in a dryer at 105 ° C. for 2 hours, dried, and allowed to cool in a desiccator, and were measured by a mercury intrusion method. The production conditions are shown in Table 1 and the production results are shown in Table 2. Further, the product obtained by disposing the reinforcing bars was checked for the presence of chipped corners.
【0017】[0017]
【表1】 原料配合(重量%) 計算上 (1) Y 水 水熱 水熱 C セメ ケイ 生石 消 の生石 ÷ / 処理 処理 / ント 石 灰 石 灰 (2) % 粉 温度 時間 S (1) 灰 (2) (℃) (H) 1 0.35 6 73.1 20.9 0 20.9 100 70 0.51 180 45 2 0.35 8 72.6 13.6 7.7 19.4 70 60 0.74 180 45 3 0.35 10 72 12.6 7.1 18 70 50 0.69 180 45 4 0.35 12 71.5 16.5 0 16.5 100 60 0.56 180 45 5 0.35 14 70.9 10.6 5.9 15.1 70 70 0.58 190 30 6 0.35 16 70.4 2.7 14.4 13.6 20 20 0.77 190 30 7 0.35 18 69.8 12.2 0 12.2 100 10 0.65 190 30 8 0.6 6 61.7 25.8 8.6 32.3 80 70 0.65 180 7 9 0.6 8 61.2 24.6 8.2 30.8 80 60 0.62 180 7 10 0.6 10 60.6 14.7 19.4 29.4 50 50 0.70 180 7 11 0.6 12 60.1 16.7 14.8 27.9 60 40 0.60 180 5 12 0.6 14 59.6 21.1 7 26.4 80 30 0.52 180 5 13 0.6 16 59 17.5 9.9 25 70 20 0.72 180 5 14 0.6 18 58.5 4.7 24.8 23.5 20 10 0.77 180 5 15 1.2 6 44.8 39.4 13 49.2 80 70 0.62 180 7 16 1.2 8 44.3 38.2 12.6 47.7 80 60 0.65 180 7 17 1.2 10 43.7 32.4 18.4 46.3 70 50 0.58 180 5 18 1.2 12 43.2 17.9 35.5 44.8 40 40 0.66 180 5 19 1.2 14 42.7 30.3 17.2 43.3 70 30 0.70 180 3 20 1.2 16 42.2 41.8 0 41.8 100 20 0.65 180 3 21 1.2 18 41.7 32.2 10.7 40.3 80 10 0.79 180 3 [Table 1] Raw material composition (% by weight) Calculated (1) Y water Hydrothermal Hydrothermal C Semekei Raw stone of raw stone ÷ / Treatment treatment / Thing Lime Lime Lime (2)% Powder Temperature Time S (1) Ash (2) (° C) (H) 1 0.35 6 73.1 20.9 0 20.9 100 70 0.51 180 45 2 0.35 8 72.6 13.6 7.7 19.4 70 60 0.74 180 45 3 0.35 10 72 12.6 7.1 18 70 50 0.69 180 45 4 0.35 12 71.5 16.5 0 16.5 100 60 0.56 180 45 5 0.35 14 70.9 10.6 5.9 15.1 70 70 0.58 190 30 6 0.35 16 70.4 2.7 14.4 13.6 20 20 0.77 190 30 7 0.35 18 69.8 12.2 0 12.2 100 10 0.65 190 30 8 0.6 6 61.7 25.8 8.6 32.3 80 70 0.65 180 7 9 0.6 8 61.2 24.6 8.2 30.8 80 60 0.62 180 7 10 0.6 10 60.6 14.7 19.4 29.4 50 50 0.70 180 7 11 0.6 12 60.1 16.7 14.8 27.9 60 40 0.60 180 5 12 0.6 14 59.6 21.1 7 26.4 80 30 0.52 180 5 13 0.6 16 59 17.5 9.9 25 70 20 0.72 180 5 14 0.6 18 58.5 4.7 24.8 23.5 20 10 0.77 180 5 15 1.2 6 44.8 39.4 13 49.2 80 70 0.62 180 7 16 1.2 8 44.3 38.2 12.6 47.7 80 60 0.65 180 7 17 1.2 10 43.7 32.4 18.4 46.3 70 50 0.58 180 5 18 1.2 12 43.2 17.9 35.5 44.8 40 40 0.66 180 5 19 1.2 14 42.7 30.3 17.2 43.3 70 30 0.70 180 3 20 1.2 16 42.2 41.8 0 41.8 100 20 0.65 180 3 21 1.2 18 41.7 32.2 10.7 40.3 80 10 0.79 180 Three
【0018】[0018]
【表2】 NO かさ比重 製品圧縮強度 細孔容積 硬化体圧縮強度 (kg/cm2) (体積%) (kg/cm2) 1 1.12 180 42 3.01 2 1.13 230 40 4.02 3 1.18 200 45 4.85 4 1.20 250 42 5.82 5 1.22 280 43 6.50 6 1.26 300 41 7.37 7 1.28 330 40 8.24 8 0.98 350 53 3.44 9 1.00 380 54 4.00 10 1.03 460 52 5.27 11 1.06 430 50 5.74 12 1.10 500 49 7.01 13 1.12 580 47 7.59 14 1.17 560 47 8.66 15 0.70 300 72 3.66 16 0.73 320 70 4.53 17 0.76 350 65 5.30 18 0.80 390 63 6.38 19 0.82 390 64 7.25 20 0.87 420 61 8.02 21 0.91 450 60 8.89 [Table 2] NO bulk specific gravity Product compressive strength Pore volume Cured product compressive strength (kg / cm 2 ) (vol%) (kg / cm 2 ) 1 1.12 180 42 3.01 2 1.13 230 40 4.02 3 1.18 200 45 4.85 4 1.20 250 42 5.82 5 1.22 280 43 6.50 6 1.26 300 41 7.37 7 1.28 330 40 8.24 8 0.98 350 53 3.44 9 1.00 380 54 4.00 10 1.03 460 52 5.27 11 1.06 430 50 5.74 12 1.10 500 49 7.01 13 1.12 580 47 7.59 14 1.17 560 47 8.66 15 0.70 300 72 3.66 16 0.73 320 70 4.53 17 0.76 350 65 5.30 18 0.80 390 63 6.38 19 0.82 390 64 7.25 20 0.87 420 61 8.02 21 0.91 450 60 8.89
【0019】 上記実施例では硬化体に亀裂が
生じたり、製品に欠けが生じたりする事なく製造出来
た。
In the above example, the cured product could be produced without cracking or chipping of the product.
【0020】[0020]
【発明の効果】本発明によれば、9〜20階建ての建物
の外壁として用いることのできる、かさ比重がPCCW
より小さい0.7〜1.5で、圧縮強度200kg/cm
2以上のコンクリート製品を確実に提供することができ
る。
According to the present invention, the specific gravity of PCCW which can be used as the outer wall of a 9 to 20 storey building can be used.
0.7 to 1.5 smaller, 200 kg / cm compressive strength
Two or more concrete products can be reliably provided.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭58−125654(JP,A) (58)調査した分野(Int.Cl.6,DB名) C04B 38/00 302 C04B 28/18 C04B 22:06────────────────────────────────────────────────── (5) References JP-A-58-125654 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) C04B 38/00 302 C04B 28/18 C04B 22 : 06

Claims (2)

    (57)【特許請求の範囲】(57) [Claims]
  1. 【請求項1】 CaO/SiO2モル比が0.35〜1.
    2で、トバモライトとケイ酸カルシウム水和物を主体と
    し細孔直径が100μm以下で細孔容積が35〜70%
    であり、かさ比重が0.7〜1.5、圧縮強度200kg
    /cm2以上である軽量コンクリート製品。
    1. The method according to claim 1, wherein the molar ratio of CaO / SiO 2 is 0.35-1.
    2, the main component is tobermorite and calcium silicate hydrate, the pore diameter is 100 μm or less, and the pore volume is 35 to 70%.
    With a bulk specific gravity of 0.7 to 1.5 and a compressive strength of 200 kg
    / Cm 2 or more lightweight concrete products.
  2. 【請求項2】 ケイ酸質原料粉末と、セメントと消石灰
    又は生石灰を含む石灰質原料粉末とを、CaO/SiO
    2モル比が0.35〜1.2、セメントは全固形分中6〜
    20重量%、生石灰と消石灰又は生石灰のうちの生石灰
    を、CaO換算で計算して100重量%−5×(セメン
    ト重量%)=Y重量%以上となるように配合し、該配合
    粉末100重量部当たり50〜80重量部の水を加えて
    混合し発泡剤を含有しないスラリーを形成し、このスラ
    リーを型枠内に注入して硬化させ、該硬化体を高温高圧
    水蒸気養生する軽量コンクリート製品の製造方法。
    2. A method in which a siliceous raw material powder and a calcareous raw material powder containing cement and slaked lime or quick lime are mixed with CaO / SiO.
    2 mole ratio is 0.35 to 1.2, cement is 6 to 6 in total solids
    20% by weight, quicklime and slaked lime or quicklime among quicklime are blended so as to be 100% by weight-5 × (cement% by weight) = Y% by weight or more in terms of CaO conversion, and 100 parts by weight of the blended powder 50 to 80 parts by weight of water are added and mixed to form a slurry containing no foaming agent, and this slurry is poured into a mold and cured, and the cured product is cured at a high temperature and a high pressure to produce a lightweight concrete product. Method.
JP6043028A 1993-05-28 1994-02-17 Lightweight concrete product and method of manufacturing the same Expired - Lifetime JP2803561B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP5-151107 1993-05-28
JP15110793 1993-05-28
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JP2803561B2 true JP2803561B2 (en) 1998-09-24

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPP650198A0 (en) * 1998-10-14 1998-11-05 James Hardie International Finance B.V. Cement formulation
KR100568932B1 (en) * 2002-08-20 2006-04-07 한국후라이애쉬시멘트공업(주) Composition of Lightweight / Foamed Concrete and Method of Making Same
JP2007131488A (en) * 2005-11-10 2007-05-31 Tokyo Institute Of Technology Calcium silicate hydrate solidification product and its synthesis method
CN101967052B (en) * 2010-09-15 2013-09-11 广东新元素板业有限公司 Process for manufacturing high-strength low-density asbestos fiber-free enhanced silicate plate

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58125654A (en) * 1982-01-20 1983-07-26 Masayoshi Aoki Manufacture of calcium silicate group building material

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