JP2002068817A - Lightweight concrete composition - Google Patents
Lightweight concrete compositionInfo
- Publication number
- JP2002068817A JP2002068817A JP2000266749A JP2000266749A JP2002068817A JP 2002068817 A JP2002068817 A JP 2002068817A JP 2000266749 A JP2000266749 A JP 2000266749A JP 2000266749 A JP2000266749 A JP 2000266749A JP 2002068817 A JP2002068817 A JP 2002068817A
- Authority
- JP
- Japan
- Prior art keywords
- aggregate
- lightweight
- lightweight concrete
- cement
- concrete composition
- 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 abstract description 38
- 239000000203 mixture Substances 0.000 title claims abstract description 15
- 239000004568 cement Substances 0.000 claims abstract description 29
- 239000000843 powder Substances 0.000 claims abstract description 25
- 230000003068 static effect Effects 0.000 claims abstract description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- 235000019738 Limestone Nutrition 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 4
- 239000006028 limestone Substances 0.000 claims description 4
- 239000011513 prestressed concrete Substances 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 239000010881 fly ash Substances 0.000 claims description 3
- 229910021487 silica fume Inorganic materials 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000011398 Portland cement Substances 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 2
- 239000011400 blast furnace cement Substances 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、骨材に人工軽量骨
材を用いた軽量コンクリートにおいて、普通骨材を用い
た場合よりも水セメント比を低くせず(セメント量を多
くせず)に、必要強度および静弾性係数を満たすことが
できる軽量コンクリート組成物に関する。BACKGROUND OF THE INVENTION The present invention relates to a lightweight concrete using artificial lightweight aggregate as an aggregate without reducing the water-cement ratio (without increasing the amount of cement) as compared with a case using ordinary aggregate. , A lightweight concrete composition capable of satisfying required strength and static elastic modulus.
【０００２】[0002]
【従来の技術】コンクリートを軽量化するために骨材の
全部または一部に人工軽量骨材を用いた軽量コンクリー
トが従来から知られている。この軽量コンクリートは普
通コンクリートに比べて一般に圧縮強度および静弾性係
数がやや低い傾向がある。そこで、土木用や建築用の構
造材料として軽量コンクリートを用いる場合、必要とさ
れる圧縮強度や静弾性係数を満たすために、コンクリー
トの配合設計の際に普通骨材用いたコンクリートよりも
水セメント比を低くする傾向があった。このため単位量
あたりのセメント量が多くなり、経済性を損い、また、
セメントの水和熱が大きくなるためひび割れ等の懸念が
増すなどの問題があった。2. Description of the Related Art Lightweight concrete using artificial lightweight aggregate for all or a part of the aggregate to reduce the weight of concrete has been known. This lightweight concrete generally has a slightly lower compressive strength and a lower static modulus than ordinary concrete. Therefore, when lightweight concrete is used as a structural material for civil engineering or construction, in order to satisfy the required compressive strength and static elasticity coefficient, the water-cement ratio is lower than that of ordinary aggregate when concrete is mixed. Tended to be lower. For this reason, the amount of cement per unit amount increases, impairing economic efficiency,
There has been a problem that the heat of hydration of the cement is increased and the fear of cracking is increased.
【０００３】[0003]
【発明が解決しようとする課題】本発明は軽量コンクリ
ート組成物におけるこのような問題を解決したものであ
り、普通骨材を用いた場合と同程度の水セメント比にお
いて、必要強度および静弾性係数を満たすことができる
軽量コンクリート組成物を提供するものである。SUMMARY OF THE INVENTION The present invention solves such a problem in a lightweight concrete composition, and requires a required strength and a static elastic modulus at a water-cement ratio approximately equal to that in the case of using ordinary aggregate. It is intended to provide a lightweight concrete composition capable of satisfying the following conditions.
【０００４】すなわち、本発明は、（１）骨材の全部ま
たは一部に人工軽量骨材を用いた軽量コンクリートにお
いて、水セメント比４０〜４５％の範囲で、無機粉末を
細骨材に対して５〜３０％、セメントに対して１０〜４
０％の割合で加えることにより、４７N/mm2以上の圧縮
強度と２２kN/mm2以上の静弾性係数を有するようにした
ことを特徴とする軽量コンクリート組成物に関する。[0004] That is, the present invention provides (1) a lightweight concrete using artificial lightweight aggregate for all or a part of the aggregate, wherein the inorganic powder is added to the fine aggregate in a water cement ratio of 40 to 45%. 5 to 30%, 10 to 4 for cement
By adding in a proportion of 0% relates to lightweight concrete composition characterized in that it has to have a 47N / mm 2 or more compression strength and 22Kn / mm 2 or more static elastic modulus.
【０００５】本発明の軽量コンクリート組成物は、
（２）無機粉末が石灰石微粉末、珪石微粉末、高炉スラ
グ微粉末、フライアッシュ、またはシリカフュームであ
るもの、（３）土木用または建築用の軽量プレストレス
トコンクリート部材として用いられるものを含む。[0005] The lightweight concrete composition of the present invention comprises:
(2) those in which the inorganic powder is limestone fine powder, silica stone fine powder, blast furnace slag fine powder, fly ash, or silica fume; and (3) those used as lightweight prestressed concrete members for civil engineering or construction.
【０００６】[0006]
【発明の実施の形態】以下、本発明を実施形態に基づい
て詳細に説明する。なお、特に示さない限り％は質量％
である。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments. In addition,% is mass% unless otherwise indicated.
It is.
【０００７】一般に、プレストレスト構造部材に用いら
れるコンクリートは、設計強度４０N/mm2以上(実強度４
７N/mm2以上)、静弾性係数２０kN/mm2以上(実測値２２k
N/mm 2以上)であることが求められる。本発明の軽量コン
クリート組成物は、骨材の全部または一部に人工軽量骨
材を用いた軽量コンクリートにおいて、水セメント比４
０〜４５％の範囲で、無機粉末を細骨材に対して５〜３
０％、セメントに対して１０〜４０％の割合で加えるこ
とにより、４７N/mm2以上の圧縮強度と２２kN/mm2以上
の静弾性係数を有するようにしたことを特徴とするもの
である。[0007] Generally, used for prestressed structural members
Concrete has a design strength of 40 N / mmTwo(Actual strength 4
7N / mmTwoAbove), static elasticity coefficient 20 kN / mmTwoAbove (measured value 22k
N / mm TwoAbove). The lightweight component of the present invention
The cleat composition contains artificial light bone on all or part of the aggregate.
Of lightweight cement using water-cement
In the range of 0 to 45%, the inorganic powder is added to the fine aggregate in an amount of 5 to 3%.
0%, 10-40% of cement
And 47N / mmTwoAbove compressive strength and 22kN / mmTwothat's all
Characterized by having a static modulus of elasticity of
It is.
【０００８】本発明に係る軽量コンクリート組成物の水
セメント比は４０〜４５％の範囲である。水セメント比
が４０％より低いと、単位量あたりのセメント量が多く
なるので本発明の目的に適さず、またフレッシュコンク
リートの流動性が低下する。また、水セメント比が４５
％より大きいと単位量あたりのセメント量が少ないので
必要な圧縮強度および静弾性係数を得るのが難しくな
る。[0008] The water cement ratio of the lightweight concrete composition according to the present invention is in the range of 40 to 45%. If the water-cement ratio is lower than 40%, the amount of cement per unit amount increases, which is not suitable for the purpose of the present invention, and the fluidity of fresh concrete is reduced. In addition, the water cement ratio is 45
%, The amount of cement per unit amount is small, so that it is difficult to obtain the required compressive strength and static elastic modulus.
【０００９】本発明の軽量コンクリート組成物は、無機
混和材として無機粉末を加えたものである。無機粉末の
添加量は、細骨材に対して５〜３０％、セメントに対し
て１０〜４０％の割合となる量である。無機粉末の添加
量がこれより少ないとコンクリートの圧縮強度および静
弾性係数を高める効果が乏しい。一方、無機粉末の添加
量がこれより多いとコンクリートの粉体量が過剰にな
り、骨材の最適な粒度分布を損なうと共にフレッシュコ
ンクリートが粉っぽくなり、流動性が低下するので好ま
しくない。The lightweight concrete composition of the present invention is obtained by adding an inorganic powder as an inorganic admixture. The amount of the inorganic powder to be added is 5 to 30% based on the fine aggregate and 10 to 40% based on the cement. If the amount of the inorganic powder is less than this, the effect of increasing the compressive strength and static elastic modulus of the concrete is poor. On the other hand, when the addition amount of the inorganic powder is larger than this, the amount of the concrete powder becomes excessive, which impairs the optimal particle size distribution of the aggregate, and also makes the fresh concrete powdery, which is not preferable because the fluidity is reduced.
【００１０】無機粉末としては石灰石微粉末、珪石微粉
末、高炉スラグ微粉末、フライアッシュ、またはシリカ
フューム等を用いることができる。なお、好ましくは石
灰石微粉末が良い。無機粉末の粒度は限定されず、一般
には比表面積２,０００〜２５０,０００cm2/g程度であ
ればよい。As the inorganic powder, limestone fine powder, silica stone fine powder, blast furnace slag fine powder, fly ash, silica fume or the like can be used. Note that limestone fine powder is preferable. The particle size of the inorganic powder is not limited, and generally, the specific surface area may be about 2,000 to 250,000 cm 2 / g.
【００１１】人工軽量骨材としては、例えば、本出願人
の商品に係る低吸水性の高強度造粒型人工軽量骨材（商
品名アサノスーパライト：太平洋セメント社製品）など
が好適である。人工軽量骨材の使用量は通常の軽量コン
クリートにおいて使用される量であれば良い。細骨材は
人工軽量骨材あるいは陸砂などの普通骨材を用いること
ができる。粗骨材と細骨材の量比も特に限定されない。As the artificial lightweight aggregate, for example, a low-water-absorbing, high-strength, granulated artificial lightweight aggregate (trade name: Asano Superite: a product of Taiheiyo Cement Corporation) according to the product of the present applicant is suitable. The amount of artificial lightweight aggregate used may be any amount used in ordinary lightweight concrete. As the fine aggregate, an ordinary lightweight aggregate such as artificial lightweight aggregate or land sand can be used. The ratio of the amount of coarse aggregate to fine aggregate is not particularly limited.
【００１２】本発明の軽量コンクリートに用いるセメン
トとしては、普通ポルトランドセメントや早強ポルトラ
ンドセメントなどのポルトランドセメント、高炉セメン
ト、シリカセメント等の混合セメントなどを用いること
ができる。セメントの他に必要に応じて各種の混和剤を
用いることができる。例えば、各種の高性能減水剤や高
性能ＡＥ減水剤、ＡＥ助剤などを用いることができる。As the cement used for the lightweight concrete of the present invention, portland cement such as ordinary portland cement and early-strength portland cement, and mixed cement such as blast furnace cement and silica cement can be used. Various admixtures can be used as needed in addition to cement. For example, various high performance water reducing agents, high performance AE water reducing agents, AE auxiliaries and the like can be used.
【００１３】[0013]
【実施例】以下、本発明を実施例によって具体的に示
す。なお、これらの例は本発明の実施範囲を限定するも
のではない。EXAMPLES The present invention will be specifically described below with reference to examples. These examples do not limit the scope of the present invention.
【００１４】実施例１ 表１に示す材料を用い、表２に示す配合割合に従って軽
量コンクリートを製造した（表１の細骨材、粗骨材、高
性能ＡＥ減水剤およびＡＥ助剤は商品名）。この軽量コ
ンクリートについて、水中養生２８日の圧縮強度(JIS A
1108準拠)および静弾性係数(JSCE-G502準拠)を測定し
た。この結果を表２に示した。また、図１にこの結果と
共に、水セメント比５０％および３５％の例を示した。
表２および図１に示すように、水セメント比４０〜４５
において、無機粉末の添加量が本発明の範囲より少ない
比較例１,２,４,５は圧縮強度および静弾性係数の何れ
も基準（圧縮強度４７N/mm2以上、静弾性係数２２kN/mm
2以上）に達しない。無機粉末の添加量が本発明の範囲
を上回る比較例３,６はフレッシュコンクリートが粉っ
ぽくなり流動性が低下するので作業性が劣る。なお、水
セメント比５０の比較例７、８は何れも圧縮強度および
静弾性係数が基準に満たない。一方、本発明の範囲内の
実施例１〜８は何れも圧縮強度および静弾性係数が基準
を上回り、かつフレッシュコンクリートの流動性も良好
である。 Example 1 Lightweight concrete was manufactured using the materials shown in Table 1 in accordance with the mixing ratios shown in Table 2 (fine aggregates, coarse aggregates, high-performance AE water reducing agents and AE auxiliaries in Table 1 are trade names). ). About this lightweight concrete, compressive strength (JIS A
1108) and static elastic modulus (based on JSCE-G502). The results are shown in Table 2. FIG. 1 shows examples of the water cement ratio of 50% and 35% together with the results.
As shown in Table 2 and FIG.
In Comparative Examples 1, 2, 4, and 5 in which the amount of the inorganic powder added was less than the range of the present invention, both the compressive strength and the static elastic modulus were standard (compressive strength of 47 N / mm 2 or more, static elastic modulus of 22 kN / mm
2 or more). In Comparative Examples 3 and 6 in which the amount of the inorganic powder added exceeds the range of the present invention, the workability is inferior because the fresh concrete becomes powdery and the fluidity decreases. In each of Comparative Examples 7 and 8 having a water-cement ratio of 50, the compressive strength and the static modulus of elasticity are below the standards. On the other hand, in Examples 1 to 8 within the scope of the present invention, the compressive strength and the static elastic modulus are all higher than the standards, and the fluidity of the fresh concrete is good.
【００１５】[0015]
【表１】 [Table 1]
【００１６】[0016]
【表２】 [Table 2]
【００１７】[0017]
【発明の効果】以上のように、本発明の軽量コンクリー
ト組成物は普通骨材を用いた場合と同水準の水セメント
比の範囲で、プレストレスト構造用コンクリートとして
必要な圧縮強度と静弾性係数を満たすことができる。従
って、土木用および建築用の軽量プレストレストコンク
リート(ＰＣ)材料として特に好適である。As described above, the lightweight concrete composition of the present invention has a compressive strength and a static elastic modulus required for prestressed structural concrete within the same water-cement ratio range as that when ordinary aggregate is used. Can be satisfied. Therefore, it is particularly suitable as a lightweight prestressed concrete (PC) material for civil engineering and construction.
【図面の簡単な説明】[Brief description of the drawings]
【図１】 実施例１の結果を示すグラフFIG. 1 is a graph showing the results of Example 1.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ０４Ｂ 18:14 Ｃ０４Ｂ 18:14 Ｚ 14:06 14:06 Ｚ 14:28） 14:28） 111:40 111:40 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) C04B 18:14 C04B 18:14 Z 14:06 14:06 Z 14:28) 14:28) 111: 40 111: 40
Claims (3)
用いた軽量コンクリートにおいて、水セメント比４０〜
４５％の範囲で、無機粉末を細骨材に対して５〜３０
％、セメントに対して１０〜４０％の割合で加えること
により、４７N/mm2以上の圧縮強度と２２kN/mm2以上の
静弾性係数を有するようにしたことを特徴とする軽量コ
ンクリート組成物。The present invention relates to a lightweight concrete using artificial lightweight aggregate for all or a part of the aggregate.
In the range of 45%, the inorganic powder is added to the fine aggregate in an amount of 5 to 30%.
%, By adding in a proportion of 10-40% with respect to the cement, lightweight concrete composition characterized in that it has to have a 47N / mm 2 or more compression strength and 22Kn / mm 2 or more static elastic modulus.
高炉スラグ微粉末、フライアッシュ、またはシリカフュ
ームである請求項１の軽量コンクリート組成物。2. The method according to claim 1, wherein the inorganic powder is limestone fine powder, silica stone fine powder,
The lightweight concrete composition according to claim 1, which is blast furnace slag fine powder, fly ash, or silica fume.
トコンクリート部材として用いられる請求項１、または
２の軽量コンクリート組成物。3. The lightweight concrete composition according to claim 1, which is used as a lightweight prestressed concrete member for civil engineering or construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000266749A JP2002068817A (en) | 2000-09-04 | 2000-09-04 | Lightweight concrete composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000266749A JP2002068817A (en) | 2000-09-04 | 2000-09-04 | Lightweight concrete composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002068817A true JP2002068817A (en) | 2002-03-08 |
Family
ID=18753787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000266749A Pending JP2002068817A (en) | 2000-09-04 | 2000-09-04 | Lightweight concrete composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002068817A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1247952A1 (en) | 2001-04-03 | 2002-10-09 | Nissan Motor Co., Ltd. | Exhaust gas purifying system |
| KR101048669B1 (en) * | 2007-01-31 | 2011-07-12 | (주)두영티앤에스 | Repair mortar and tunnel repair method using the same |
| CN102432249A (en) * | 2011-09-30 | 2012-05-02 | 广东东鹏陶瓷股份有限公司 | Anti-static composite concrete and preparation method thereof |
| JP2019064872A (en) * | 2017-10-02 | 2019-04-25 | 川田建設株式会社 | Fiber reinforced lightweight concrete |
-
2000
- 2000-09-04 JP JP2000266749A patent/JP2002068817A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1247952A1 (en) | 2001-04-03 | 2002-10-09 | Nissan Motor Co., Ltd. | Exhaust gas purifying system |
| KR101048669B1 (en) * | 2007-01-31 | 2011-07-12 | (주)두영티앤에스 | Repair mortar and tunnel repair method using the same |
| CN102432249A (en) * | 2011-09-30 | 2012-05-02 | 广东东鹏陶瓷股份有限公司 | Anti-static composite concrete and preparation method thereof |
| JP2019064872A (en) * | 2017-10-02 | 2019-04-25 | 川田建設株式会社 | Fiber reinforced lightweight concrete |
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