JPS6327311B2 - - Google Patents
Info
- Publication number
- JPS6327311B2 JPS6327311B2 JP58231250A JP23125083A JPS6327311B2 JP S6327311 B2 JPS6327311 B2 JP S6327311B2 JP 58231250 A JP58231250 A JP 58231250A JP 23125083 A JP23125083 A JP 23125083A JP S6327311 B2 JPS6327311 B2 JP S6327311B2
- Authority
- JP
- Japan
- Prior art keywords
- ratio
- aggregate
- concrete
- cement
- lightweight
- 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
Landscapes
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
Description
従来の人工軽量骨材を使用したコンクリートは
細骨材率が40〜50％程度（容積比）であつて、気
乾比重の軽量化限度は1.5位である。
一方、軽量化を図る意味で考えられる砂なしコ
ンクリートと呼称されるものは、細骨材を用いな
い。このコンクリートは適正な水セメント比が極
く限られた範囲内にあり、締固めは自重によるも
ので、機械的な振動を与えるとペーストが分離
し、また圧縮強度が150Kg／cm2以上は期待できず、
附着強度も低い。
本発明はこのような実情に鑑みて提案されたも
ので、水セメント比が28〜37％、セメントが75〜
100部（容積比）、粗骨材が575〜650部（容積比）、
細骨材率が４〜９％（容積比）であつて、気乾比
重が1.3以下になるように構成されたことを特徴
とするおこし状の軽量コンクリートに係るもので
ある。
本発明に係るおこし状軽量コンクリートは従来
の砂なしコンクリートと相違して、４〜９％の細
骨材率の細骨材が使用されているので、圧縮強度
及び附着強度が夫々210Kg／cm2以上並に100Kg／cm2
以上で気乾比重1.3以下のコンクリートが特別な
装置なしで得られる。
本発明において細骨材率が９％を超えるとコン
クリートの比重が大になり、且つ細骨材が均等に
分散できず、コンクリート中に「す」が生じ、強
度を低減せしめる惧れがある。また細骨材率が４
％より小になると、圧縮強度が不足する。
従つて本発明においては細骨率を４〜９％とし
たものであつて、５％程度が最適である。
次に本発明において水セメント比を28〜37％と
したのは、少ないセメント量でコンクリートの圧
縮強度を大ならしめるとともに、コンクリートの
比重を低減せしめるものである。而して水セメン
ト比が28％より小なるときはセメントの十分な水
和反応が行なわれず、比重の大きなセメントが残
留してしまい、均質なコンクリートが得られな
い。また水セメント比が37％より大きくなるとモ
ルタル量が不足し、圧縮強度が小になる。
このように本発明によれば細骨材率が極端に少
なく、水セメント比選定の選択幅が砂なしコンク
リートに比して広く、水セメント比を極端に低く
することが可能であり、市販の軽量骨材を用いて
気乾比重1.3以下、圧縮強度210Kg／cm2以上、附着
強度100Kg／cm2以上のおこし状軽量コンクリート
が特別な装置なしで得られるものであり、本発明
のおこし状軽量コンクリートは軽量、断熱、遮音
の目的に応じて適用でき、軽量カーテンウオー
ル、断熱若しくは遮音壁材料に使用される。なお
防音効果を主体として考える場合には、壁の片面
を下塗りしておくものである。
以下本発明を実施例について説明する。
早強セメント 285Kg
細骨材 33.4 62Kg
粗骨材 634.6 895Kg
細骨材率 ５％
水セメント比 35％
増量剤 400
流動化剤 2500c.c.
（註１） 骨材は人工軽量骨材ビルトン（商品
名：膨張頁岩を焼成粉砕したもの、住友金属鉱
山株式会社製造）を使用した。
（註２） 増量材はパーライトＣ種を軽詰状態で
使用した。
（註３） 流動化剤はマイテイFD（商品名：ナフ
タリンスルフオン酸塩を主成分とする界面活性
剤（花王石鹸株式会社製造）を使用した。流動
化剤は水セメント比を少なくし、しかも粗骨材
を囲繞するモルタル量を或る程度均等にするた
めに使用した。
（註４） 容積は絶対容積、重量は表乾重量であ
る。粗骨材は表乾状態で用いた。
なお本発明に係る軽量コンクリートをつくるの
に使用される骨材の量について説明する。
骨材は、その容積中に空〓を有し、その量を示
すのに空〓率を用いる。そして空〓率と反対につ
まり具合を示す値が実積率となる。
実積率＝単位重量／比重×100
前掲実施例に示された細骨材および粗骨材は、
膨張頁岩を焼成しなる人工軽量骨材ビルトン（商
品名）であり、実積率は細骨材が57.5〜58.5％、
粗骨材が60.0〜64.0％である。ここでの実施例で
は、粗骨材がコンクリート中に示す容積は63.46
％であり、粗骨材の実積率とほぼ同値である。
骨材は、粒度分布の条件により実積率が変るも
のであり、実積率を越す量を用いるのは不可能で
ある。粗骨材の用い方により実積率は変る。
本発明の軽量コンクリートは、実積率とほぼ同
値の粗骨材を用いるのが先ず必要である。
なお骨材としてはこの他、例えば前記ビルトン
と同様に膨脹頁岩を焼成した人工軽量骨材メサラ
イト（商品名：三井金属鉱業株式会社）が使用さ
れる。次にその実積率を示す。
Concrete using conventional artificial lightweight aggregate has a fine aggregate ratio of about 40 to 50% (volume ratio), and the weight reduction limit of air-dry specific gravity is about 1.5. On the other hand, sandless concrete, which is considered to be lighter in weight, does not use fine aggregate. The appropriate water-cement ratio for this concrete is within a very limited range, compaction is based on its own weight, the paste separates when mechanical vibration is applied, and a compressive strength of 150 kg/cm 2 or more is expected. I can't do it,
Adhesion strength is also low. The present invention was proposed in view of these circumstances, and the water-cement ratio is 28-37% and the cement is 75-37%.
100 parts (volume ratio), coarse aggregate 575-650 parts (volume ratio),
This invention relates to a raised lightweight concrete characterized by having a fine aggregate ratio of 4 to 9% (volume ratio) and having an air-dried specific gravity of 1.3 or less. Unlike conventional sandless concrete, the raised lightweight concrete according to the present invention uses fine aggregate with a fine aggregate ratio of 4 to 9%, so its compressive strength and adhesion strength are 210 Kg/cm 2 respectively. Above average 100Kg/cm 2
With the above steps, concrete with an air-dry specific gravity of 1.3 or less can be obtained without any special equipment. In the present invention, if the fine aggregate ratio exceeds 9%, the specific gravity of the concrete becomes large, and the fine aggregate cannot be evenly dispersed, causing "s" to occur in the concrete, which may reduce the strength. Also, the fine aggregate ratio is 4
If it is smaller than %, the compressive strength will be insufficient. Therefore, in the present invention, the fine bone ratio is set at 4 to 9%, and approximately 5% is optimal. Next, in the present invention, the water-cement ratio is set to 28 to 37% in order to increase the compressive strength of concrete with a small amount of cement and to reduce the specific gravity of concrete. If the water-cement ratio is less than 28%, sufficient hydration reaction of cement will not take place, and cement with a high specific gravity will remain, making it impossible to obtain homogeneous concrete. Furthermore, if the water-cement ratio is greater than 37%, the amount of mortar will be insufficient and the compressive strength will be low. As described above, according to the present invention, the fine aggregate ratio is extremely low, the selection range for selecting the water-cement ratio is wider than that of sandless concrete, and the water-cement ratio can be made extremely low. A raised lightweight concrete having an air-dry specific gravity of 1.3 or less, a compressive strength of 210 kg/cm 2 or more, and an adhesion strength of 100 kg/cm 2 or more can be obtained using lightweight aggregate without any special equipment, and the raised lightweight concrete of the present invention Concrete can be applied for lightweight, thermal, and sound insulation purposes, and is used for lightweight curtain walls, thermal insulation, or sound insulation wall materials. If the main consideration is soundproofing, one side of the wall should be primed. The present invention will be described below with reference to Examples. Early strength cement 285Kg Fine aggregate 33.4 62Kg Coarse aggregate 634.6 895Kg Fine aggregate ratio 5% Water-cement ratio 35% Bulking agent 400 Superplasticizer 2500c.c. (Note 1) The aggregate is artificial lightweight aggregate Bilton (product name) : Expanded shale calcined and crushed (manufactured by Sumitomo Metal Mining Co., Ltd.) was used. (Note 2) Perlite C type was used as the filler in a lightly packed state. (Note 3) The fluidizing agent used was Mighty FD (trade name: a surfactant whose main component is naphthalene sulfonate (manufactured by Kao Soap Co., Ltd.).The fluidizing agent was designed to reduce the water-to-cement ratio. It was used to make the amount of mortar surrounding the coarse aggregate even to some extent. (Note 4) Volume is absolute volume, weight is surface dry weight. Coarse aggregate was used in a surface dry state. The amount of aggregate used to make the lightweight concrete according to the invention will be explained. Aggregate has voids in its volume, and the void ratio is used to indicate the amount. On the contrary, the value indicating the degree of clogging is the actual area ratio. Actual area ratio = unit weight / specific gravity × 100 The fine aggregate and coarse aggregate shown in the above example are:
Bilton (trade name) is an artificial lightweight aggregate made from calcined expanded shale, and the actual area ratio is 57.5 to 58.5% fine aggregate.
Coarse aggregate is 60.0-64.0%. In this example, the volume of coarse aggregate in concrete is 63.46
%, which is almost the same value as the actual area ratio of coarse aggregate. The actual area ratio of aggregate changes depending on the particle size distribution conditions, and it is impossible to use an amount exceeding the actual area ratio. The actual area ratio varies depending on how the coarse aggregate is used. In the lightweight concrete of the present invention, it is first necessary to use coarse aggregate of approximately the same value as the actual area ratio. In addition, as the aggregate, for example, the artificial lightweight aggregate Mesalite (trade name: Mitsui Mining & Mining Co., Ltd.), which is made of calcined expanded shale like the above-mentioned biltong, is used. Next, the actual area rate is shown.
【表】
もし、メサライトで、本発明に係る軽量コンク
リートをつくると、粗骨材の量は600前後にな
り、細骨材率は４〜９％になる。
なお本発明で使用される粗骨材、細骨材は前記
実施例の他、現在使用されている人工軽量骨材は
すべて使用されるものである。
次に前記実施例で用いたビルトン細骨材および
ビルトン粗骨材の粒度を示す。[Table] If the lightweight concrete according to the present invention is made from mesalite, the amount of coarse aggregate will be around 600, and the percentage of fine aggregate will be 4 to 9%. In addition to the coarse aggregates and fine aggregates used in the present invention, in addition to the above-mentioned examples, all currently used artificial lightweight aggregates can be used. Next, the particle sizes of the biltong fine aggregate and biltong coarse aggregate used in the above examples are shown.
【表】
なお参考値として人工軽量骨材メサライト（前
掲）の粒度を示す。）[Table] The particle size of the artificial lightweight aggregate Mesalite (listed above) is shown as a reference value. )
【表】
以上の配合例で得られたおこし状軽量コンクリ
ートの特性を挙げる。
スランプ 0.4cm
気乾比重 1.272
（註） スランプは通常のコンクリートのスラン
プ値とは異なり、施工性はあるが崩れるので、
締固めには注意を要する。
次に前記おきし状軽量コンクリートの強度試験
結果を挙げる。
(A) 養生条件 標準
材令１日 圧縮 128Kg／cm2
材令 １週 圧縮 174〃
曲げ 30〃
材令 ４週 圧縮 213〃
曲げ 33〃
附着 100〃
(B) 養生条件 蒸気
材令 １日 圧縮 171Kg／cm2
材令 １週 圧縮 206〃
曲げ 22〃
材令 ４週 圧縮 226〃
曲げ 21Kg／cm2
上記のようにして得られたおこし状軽量コンク
リートはその乾燥収縮が普通コンクリートに比し
て可成り小で、収縮速度は非常に速い。また熱伝
導率は普通コンクリートに比して著しく小であ
り、更にこのコンクリートの壁は片面を不塗りす
ると防音効果が生じ、更にまたこのコンクリート
は通常の現場条件で打設できる。
以上本発明を実施例について説明したが、本発
明は勿論このような実施例にだけ局限されるもの
ではなく、本発明の精神を逸脱しない範囲内で
種々の設計の改変を施しうるものである。[Table] The properties of the raised lightweight concrete obtained with the above mixing examples are listed. Slump 0.4cm Air-dried specific gravity 1.272 (Note) Slump is different from the slump value of ordinary concrete, and although it has workability, it will collapse.
Care must be taken when compacting. Next, the strength test results of the above-mentioned wedge-shaped lightweight concrete will be listed. (A) Curing conditions Standard material age 1 day Compression 128Kg/cm 2 material age 1 week Compression 174〃 Bending 30〃 Material age 4 weeks Compression 213〃 Bending 33〃 Attachment 100〃 (B) Curing conditions Steam material age 1 day Compression 171Kg /cm 2 Material age 1 week Compression 206〃 Bending 22〃 Material age 4 weeks Compression 226〃 Bending 21Kg/cm 2 The drying shrinkage of the raised lightweight concrete obtained as described above is considerably higher than that of ordinary concrete. It is small and shrinks very quickly. Furthermore, the thermal conductivity is significantly lower than that of ordinary concrete, furthermore, this concrete wall has a soundproofing effect when one side is left uncoated, and furthermore, this concrete can be poured under normal site conditions. Although the present invention has been described above with reference to embodiments, the present invention is, of course, not limited to these embodiments, and can be modified in various ways without departing from the spirit of the invention. .
Claims (1)
100部（容積比）、粗骨材が575〜650部（容積比）、
細骨材率が４〜９％（容積比）であつて、気乾比
重が1.3以下になるように構成されたことを特徴
とするおこし状の軽量コンクリート。1 Water-cement ratio is 28~37%, cement is 75~
100 parts (volume ratio), coarse aggregate 575-650 parts (volume ratio),
A raised lightweight concrete characterized by having a fine aggregate ratio of 4 to 9% (volume ratio) and having an air-dried specific gravity of 1.3 or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23125083A JPS60127279A (en) | 1983-12-09 | 1983-12-09 | Foamed lightweight concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23125083A JPS60127279A (en) | 1983-12-09 | 1983-12-09 | Foamed lightweight concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60127279A JPS60127279A (en) | 1985-07-06 |
| JPS6327311B2 true JPS6327311B2 (en) | 1988-06-02 |
Family
ID=16920670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23125083A Granted JPS60127279A (en) | 1983-12-09 | 1983-12-09 | Foamed lightweight concrete |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60127279A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63265879A (en) * | 1987-04-21 | 1988-11-02 | Fujita Corp | Manufacturing method of concrete products |
| JP2002240722A (en) * | 2000-12-13 | 2002-08-28 | Kawajun Co Ltd | Tray rack board |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5649868B2 (en) * | 1972-08-25 | 1981-11-25 | ||
| JPS5312859U (en) * | 1976-07-13 | 1978-02-02 | ||
| JPS5638547A (en) * | 1979-09-07 | 1981-04-13 | Hitachi Ltd | Variable venturi type carburetor |
-
1983
- 1983-12-09 JP JP23125083A patent/JPS60127279A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60127279A (en) | 1985-07-06 |
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