JP2014019586A - Paste composition and mortar composition - Google Patents

Paste composition and mortar composition Download PDF

Info

Publication number
JP2014019586A
JP2014019586A JP2012156844A JP2012156844A JP2014019586A JP 2014019586 A JP2014019586 A JP 2014019586A JP 2012156844 A JP2012156844 A JP 2012156844A JP 2012156844 A JP2012156844 A JP 2012156844A JP 2014019586 A JP2014019586 A JP 2014019586A
Authority
JP
Japan
Prior art keywords
mass
paste composition
cement
powder
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.)
Granted
Application number
JP2012156844A
Other languages
Japanese (ja)
Other versions
JP6063159B2 (en
Inventor
Takayoshi Hirata
隆祥 平田
Yoshikazu Ishizeki
嘉一 石関
Koji Tamataki
浩司 玉滝
Koichiro Yoshida
浩一郎 吉田
Hirokazu Kiriyama
宏和 桐山
Original Assignee
Ube Ind Ltd
宇部興産株式会社
Ohbayashi Corp
株式会社大林組
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
Application filed by Ube Ind Ltd, 宇部興産株式会社, Ohbayashi Corp, 株式会社大林組 filed Critical Ube Ind Ltd
Priority to JP2012156844A priority Critical patent/JP6063159B2/en
Publication of JP2014019586A publication Critical patent/JP2014019586A/en
Application granted granted Critical
Publication of JP6063159B2 publication Critical patent/JP6063159B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Abstract

PROBLEM TO BE SOLVED: To provide a paste composition capable of exhibiting high compressive strength early only with a curing at a room temperature and reducing self shrinkage strain while having high toughness.SOLUTION: A paste composition contains cement, silica fume, water, water-reducing agent, antifoamer, expansive additive, an inorganic fine powder and a high tensile strength fiber. The cement contains 40.0 to 75.0 mass% of CS and less than 2.7 mass% of CA and has a residue after 45 μm sieve of less than 25.0 mass%, the inorganic fine powder contains at least one kind of fine powders selected from a group consisting of a limestone powder, a silicate pigment, a crushed stone powder and a slag powder, and a mixture contains 86 to 100 mass% of particles having a particle size of 0.15 mm or less and 70 mass% or more of particles having the particle size of 0.075 mm or less when the inorganic fine powder is mixed.

Description

本発明は、ペースト組成物及びモルタル組成物に関する。   The present invention relates to a paste composition and a mortar composition.

近年、構造部材の軽量化、鉄筋使用量の削減などの要求に伴い、150N/mm以上の圧縮強度を発現し、しかも曲げ強度の高い超高強度コンクリートが提案されている。これらのコンクリートでは、セメント、ポゾラン質微粉末、骨材、高性能減水剤、金属繊維が使用され、熱養生によって超高強度化が図られている(特許文献1及び2参照)。また、引張応力下で擬似ひずみ硬化(初期ひびわれ発生後に引張応力が上昇する挙動)を示し、変形が増大してもひび割れ幅の抑制機能を有する、高じん性の繊維補強セメント複合材料が提案されている(特許文献3参照)。このセメント複合材料では、ポリビニルアルコール等の有機短繊維によって、高じん性化が図られている。 In recent years, ultra-high-strength concrete that exhibits a compressive strength of 150 N / mm 2 or more and high bending strength has been proposed in accordance with demands for reducing the weight of structural members and reducing the amount of reinforcing bars used. In these concretes, cement, pozzolanic fine powder, aggregate, high-performance water reducing agent, and metal fiber are used, and ultrahigh strength is achieved by heat curing (see Patent Documents 1 and 2). Also proposed is a highly tough fiber-reinforced cement composite that exhibits pseudo-strain hardening under tensile stress (a behavior in which tensile stress increases after initial cracking) and has a function of suppressing crack width even when deformation increases. (See Patent Document 3). In this cement composite material, high toughness is achieved by organic short fibers such as polyvinyl alcohol.

特開2001−181004号公報JP 2001-181004 A 特開2006−298679号公報JP 2006-298679 A 特開2007−126317号公報JP 2007-126317 A

しかしながら、超高強度コンクリートを熱養生する場合は、工場で型枠を使用して製造するため、建設現場までの製品の運搬が必要である。また、コンクリート製品の形状や大きさは、使用する型枠や養生装置の形状により制約を受けるため、超高強度コンクリートの設計の自由度が制限される。一方、擬似ひずみ硬化特性を示す高じん性セメント系材料は、現場施工が可能であるが、圧縮及び引張強度は通常のコンクリートと同程度である。このため、熱養生が不要であり、現場施工が可能な、高じん性かつ高強度の材料が求められている。また、構造物の耐久性、長寿命化、高品質化などの観点から、コンクリートの収縮は小さいほうが望ましい。そのため、上記材料には、自己収縮によるひずみを低減することが求められている。   However, when heat-curing ultra-high-strength concrete, it is necessary to transport the product to the construction site because it is manufactured using a formwork at the factory. Moreover, since the shape and size of the concrete product are restricted by the formwork used and the shape of the curing device, the degree of freedom in designing ultra-high-strength concrete is limited. On the other hand, a highly tough cement-based material exhibiting pseudo-strain hardening characteristics can be applied on-site, but its compressive and tensile strength is comparable to that of ordinary concrete. For this reason, there is a need for a highly tough and high strength material that does not require heat curing and can be applied on site. In addition, it is desirable that the shrinkage of the concrete is small from the viewpoint of the durability, long life, and high quality of the structure. Therefore, the material is required to reduce strain due to self-shrinkage.

そこで本発明は、高じん性を有しつつ、常温養生のみで早期に高い圧縮強度を発現でき、かつ、自己収縮ひずみを低減できる、ペースト組成物及びモルタル組成物を提供することを目的とする。   Then, this invention aims at providing the paste composition and mortar composition which can express high compressive strength at an early stage only by normal temperature curing, and can reduce self-shrinkage strain, while having high toughness. .

本発明者らは、上記の課題を解決すべく鋭意検討した結果、特定の鉱物組成及び粒度分布を有するセメントと特定の粒度を有する無機質微粉末を、シリカフューム、水、減水剤、消泡剤、膨張材及び高張力繊維と組み合わせることにより、高じん性を有しつつ、熱養生しなくともペースト組成物及びモルタル組成物の強度を向上でき、かつ、自己収縮ひずみを低減できることを見出し、本発明を完成するに至った。   As a result of intensive studies to solve the above-mentioned problems, the inventors of the present invention obtained a cement having a specific mineral composition and particle size distribution and an inorganic fine powder having a specific particle size by combining silica fume, water, a water reducing agent, an antifoaming agent, It has been found that by combining with an expansion material and high-tensile fibers, the strength of the paste composition and the mortar composition can be improved without self-curing while having high toughness, and the self-shrinkage strain can be reduced. It came to complete.

すなわち本発明は、セメントと、シリカフュームと、水と、減水剤と、消泡剤と、膨張材と、無機質微粉末と、高張力繊維とを含み、セメントは、CSを40.0〜75.0質量%及びCAを2.7質量%未満含有し、かつ、45μmふるい残分が25.0質量%未満であり、無機質微粉末が、石灰石粉、珪石粉、砕石粉及びスラグ粉からなる群より選ばれる少なくとも1種の微粉末を含有し、無機質微粉末を混合したときに、その混合物は、粒径0.15mm以下の粒群を86〜100質量%、かつ、粒径0.075mm以下の粒群を70質量%以上含有する、ペースト組成物を提供する。このようなペースト組成物は、高じん性を有しつつ、常温養生のみで早期に高い圧縮強度を発現でき、かつ、自己収縮ひずみを低減できる。 That is, the present invention includes cement, silica fume, water, water reducing agent, antifoaming agent, expansion material, inorganic fine powder, and high-tensile fiber, and the cement contains C 3 S of 40.0 to 75.0% by mass and less than 2.7% by mass of C 3 A, and 45 μm sieve residue is less than 25.0% by mass, and the fine inorganic powder is limestone powder, quartzite powder, crushed stone powder and slag When at least one kind of fine powder selected from the group consisting of powder is contained, and the inorganic fine powder is mixed, the mixture contains 86 to 100% by mass of a particle group having a particle size of 0.15 mm or less, and a particle size A paste composition containing 70% by mass or more of a particle group of 0.075 mm or less is provided. Such a paste composition has high toughness, can express high compressive strength at an early stage only by normal temperature curing, and can reduce self-shrinkage strain.

無機質微粉末のブレーン比表面積が3000〜5000cm/gであると、ペースト組成物の流動性を向上できる。また、本発明のペースト組成物は、セメント及びシリカフュームの合計量100質量部に対して、無機質微粉末を10〜60質量部含むことにより、組成物の流動性が更に向上し、施工性により優れたものとなる。 The fluidity | liquidity of a paste composition can be improved as the brane specific surface area of an inorganic fine powder is 3000-5000 cm < 2 > / g. In addition, the paste composition of the present invention contains 10 to 60 parts by mass of inorganic fine powder with respect to 100 parts by mass of the total amount of cement and silica fume, so that the fluidity of the composition is further improved and the workability is excellent. It will be.

シリカフュームの平均粒子径が0.05〜2.0μmであると、ペースト組成物の強度を更に向上できる。そして、本発明のペースト組成物は、セメント及びシリカフュームの合計量を基準として、シリカフュームを3〜30質量%含むことが好ましい。   The intensity | strength of a paste composition can further be improved as the average particle diameter of a silica fume is 0.05-2.0 micrometers. And it is preferable that the paste composition of this invention contains 3-30 mass% of silica fume on the basis of the total amount of a cement and a silica fume.

本発明のペースト組成物は、セメント及びシリカフュームの合計量100質量部に対して、水を10〜25質量部、減水剤を0.5〜6.0質量部含むことが好ましい。これにより、ペースト組成物の強度がより一層向上する。   The paste composition of the present invention preferably contains 10 to 25 parts by mass of water and 0.5 to 6.0 parts by mass of a water reducing agent with respect to 100 parts by mass of the total amount of cement and silica fume. Thereby, the intensity | strength of a paste composition improves further.

本発明のペースト組成物において、高張力繊維は、引張強度が100〜10000N/mm、アスペクト比が40〜250であり、ペースト組成物に対する含有率が外割りで0.3〜5.0体積%であることによって、高いじん性と高い圧縮強度及び引張強度を得やすくなる。また、上記高張力繊維は、金属繊維、炭素繊維及びアラミド繊維からなる群より選ばれる1種以上の繊維であると、ペースト組成物の強度をより一層向上できる。 In the paste composition of the present invention, the high-tensile fiber has a tensile strength of 100 to 10000 N / mm 2 , an aspect ratio of 40 to 250, and an external content of 0.3 to 5.0 volume with respect to the paste composition. %, It becomes easy to obtain high toughness and high compressive strength and tensile strength. Moreover, the said high tension fiber can further improve the intensity | strength of a paste composition as it is 1 or more types of fibers chosen from the group which consists of a metal fiber, carbon fiber, and an aramid fiber.

膨張材の含有量は、5〜40kg/mであれば、ペースト組成物の自己収縮ひずみを低減しやすくなる。 If content of an expansion | swelling material is 5-40 kg / m < 3 >, it will become easy to reduce the self contraction distortion of a paste composition.

また、本発明は、上述したペースト組成物と、細骨材とを含むモルタル組成物を提供する。このようなモルタル組成物も、高じん性を有しつつ、常温養生のみで早期に高い圧縮強度を発現でき、かつ、自己収縮ひずみを低減できる。   Moreover, this invention provides the mortar composition containing the paste composition mentioned above and a fine aggregate. Such a mortar composition also has high toughness, can exhibit high compressive strength at an early stage only by room temperature curing, and can reduce self-shrinkage strain.

本発明によれば、高じん性を有しつつ、常温養生のみで早期に高い圧縮強度を発現でき、かつ、自己収縮ひずみを低減できる、ペースト組成物及びモルタル組成物を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, it can provide the paste composition and mortar composition which can express high compressive strength at an early stage only by normal temperature curing, and can reduce a self-shrinkage strain, while having high toughness.

実施例1〜9及び比較例1〜3の組成物の材齢182日後における自己収縮ひずみを表すグラフである。It is a graph showing the self-shrinking distortion after 182 days of age of the compositions of Examples 1-9 and Comparative Examples 1-3.

以下、本発明に係るペースト組成物及びモルタル組成物の好適な実施形態について説明するが、本発明は以下の実施形態に限定されるものではない。   Hereinafter, although suitable embodiment of the paste composition and mortar composition which concern on this invention is described, this invention is not limited to the following embodiment.

(ペースト組成物)
本実施形態のペースト組成物は、セメントと、シリカフュームと、水と、減水剤と、消泡剤と、膨張材と、無機質微粉末と、高張力繊維とを含むものである。
(Paste composition)
The paste composition of this embodiment contains cement, silica fume, water, a water reducing agent, an antifoaming agent, an expansion material, an inorganic fine powder, and high-tensile fiber.

セメントの鉱物組成は、CS量が40.0〜75.0質量%であり、CA量が2.7質量%未満である。セメントのCS量は、好ましくは45.0〜73.0質量%、より好ましくは48.0〜70.0質量%であり、更に好ましくは50.0〜68.0質量%である。CA量は好ましくは2.3質量%未満であり、より好ましくは2.1質量%未満であり、更に好ましくは1.9質量%未満である。CS量が40.0質量%未満では圧縮強度が低くなる傾向があり、75.0質量%を超えるとセメントの焼成自体が困難となる傾向がある。また、CA量が2.7質量%以上では流動性が悪くなる。なお、CA量の下限値は特に限定されないが、0.1質量%程度である。 As for the mineral composition of the cement, the amount of C 3 S is 40.0 to 75.0% by mass, and the amount of C 3 A is less than 2.7% by mass. The amount of C 3 S in the cement is preferably 45.0 to 73.0% by mass, more preferably 48.0 to 70.0% by mass, and still more preferably 50.0 to 68.0% by mass. The amount of C 3 A is preferably less than 2.3% by mass, more preferably less than 2.1% by mass, and even more preferably less than 1.9% by mass. If the amount of C 3 S is less than 40.0% by mass, the compressive strength tends to be low, and if it exceeds 75.0% by mass, the cement itself tends to be difficult to fire. Further, when the amount of C 3 A is 2.7% by mass or more, the fluidity is deteriorated. In addition, the lower limit of the amount of C 3 A is not particularly limited, but is about 0.1% by mass.

また、セメントのCS量は好ましくは9.5〜40.0質量%であり、より好ましくは10.0〜35.0質量%であり、更に好ましくは12.0〜30.0質量%である。CAF量は好ましくは9.0〜18.0質量%、より好ましくは10.0〜15.0質量%であり、更に好ましくは11.0〜15.0質量%である。このようなセメントの鉱物組成の範囲であれば、ペースト組成物の高い圧縮強度及び高い流動性を確保しやすくなる。 The C 2 S amount of the cement is preferably 9.5 to 40.0% by mass, more preferably 10.0 to 35.0% by mass, and still more preferably 12.0 to 30.0% by mass. It is. The amount of C 4 AF is preferably 9.0 to 18.0% by mass, more preferably 10.0 to 15.0% by mass, and still more preferably 11.0 to 15.0% by mass. If it is the range of the mineral composition of such a cement, it will become easy to ensure the high compressive strength and high fluidity | liquidity of a paste composition.

また、セメントの粒度は、45μmふるい残分の上限は、25.0質量%未満であり、好ましくは20.0質量%であり、より好ましくは18.0質量%であり、更に好ましくは15.0質量%である。45μmふるい残分の下限は0.0質量%であり、好ましくは1.0質量%であり、より好ましくは2.0質量%であり、更に好ましくは3.0質量%である。セメントの粒度がこの範囲であれば、高い圧縮強度を確保でき、また、このセメントを使用して調製したスラリーは適度な粘性があるため、繊維を添加した場合には、十分な分散性が確保できる。   The upper limit of the 45 μm sieve residue of the cement particle size is less than 25.0% by mass, preferably 20.0% by mass, more preferably 18.0% by mass, and even more preferably 15. 0% by mass. The lower limit of the 45 μm sieve residue is 0.0% by mass, preferably 1.0% by mass, more preferably 2.0% by mass, and even more preferably 3.0% by mass. If the particle size of the cement is within this range, high compressive strength can be secured, and the slurry prepared using this cement has an appropriate viscosity, so that sufficient dispersibility is secured when fibers are added. it can.

セメントのブレーン比表面積は、好ましくは2500〜4800cm/g、より好ましくは2800〜4000cm/g、更に好ましくは3000〜3600cm/gであり、特に好ましくは3200〜3500cm/gである。セメントのブレーン比表面積が2500cm/g未満ではペースト組成物の強度が低くなる傾向があり、4800cm/gを超えると低水セメント比での流動性が低下する傾向にある。 The brane specific surface area of the cement is preferably 2500 to 4800 cm 2 / g, more preferably 2800 to 4000 cm 2 / g, still more preferably 3000 to 3600 cm 2 / g, and particularly preferably 3200 to 3500 cm 2 / g. When the brane specific surface area of the cement is less than 2500 cm 2 / g, the strength of the paste composition tends to be low, and when it exceeds 4800 cm 2 / g, the fluidity at a low water cement ratio tends to be lowered.

本実施形態に係るセメントの製造にあたっては、通常のセメントと特に異なる操作を行う必要はない。上記セメントは、石灰石、珪石、スラグ、石炭灰、建設発生土、高炉ダスト等の原料の調合を目標とする鉱物組成に応じて変え、実機キルンで焼成した後、得られたクリンカーに石膏を加えて所定の粒度に粉砕することによって製造することができる。焼成するキルンには、一般的なNSPキルンやSPキルン等を使用することができ、粉砕には一般的なボールミル等の粉砕機が使用可能である。また、必要に応じて、2種以上のセメントを混合することもできる。   In manufacturing the cement according to the present embodiment, it is not necessary to perform an operation different from that of normal cement. The cement is changed according to the target mineral composition such as limestone, silica, slag, coal ash, construction generated soil, blast furnace dust, etc., fired in the actual kiln, gypsum added to the obtained clinker And can be manufactured by pulverizing to a predetermined particle size. A general NSP kiln, SP kiln, or the like can be used for the kiln to be fired, and a general pulverizer such as a ball mill can be used for pulverization. Moreover, 2 or more types of cement can also be mixed as needed.

シリカフュームは、金属シリコン、フェロシリコン、電融ジルコニア等を製造する際に発生する排ガス中のダストを集塵して得られる副産物であり、主成分は、アルカリ溶液中で溶解する非晶質のSiOである。シリカフュームの平均粒子径は、好ましくは0.05〜2.0μm、より好ましくは0.10〜1.5μm、更に好ましくは0.18〜0.28μm、特に好ましくは0.20〜0.28μmである。このようなシリカフュームを用いることで、ペースト組成物の高い圧縮強度及び高い流動性を確保しやすくなる。 Silica fume is a by-product obtained by collecting dust in the exhaust gas generated when producing metal silicon, ferrosilicon, fused zirconia, etc., and the main component is amorphous SiO dissolved in an alkaline solution. 2 . The average particle size of silica fume is preferably 0.05 to 2.0 μm, more preferably 0.10 to 1.5 μm, still more preferably 0.18 to 0.28 μm, and particularly preferably 0.20 to 0.28 μm. is there. By using such silica fume, it becomes easy to ensure high compressive strength and high fluidity of the paste composition.

本実施形態のペースト組成物において、セメント及びシリカフュームの合計量を基準として、シリカフュームを、好ましくは3〜30質量%、より好ましくは5〜20質量%、更に好ましくは10〜18質量%、特に好ましくは10〜15質量%含む。また、ペースト組成物1m当たりのシリカフュームの単位量は、好ましくは36〜360kg/m、より好ましくは61〜242kg/m、更に好ましくは121〜218kg/mである。 In the paste composition of the present embodiment, the silica fume is preferably 3 to 30% by mass, more preferably 5 to 20% by mass, still more preferably 10 to 18% by mass, particularly preferably based on the total amount of cement and silica fume. 10 to 15% by mass. The unit amount of silica fume per 1 m 3 of the paste composition is preferably 36 to 360 kg / m 3 , more preferably 61 to 242 kg / m 3 , and still more preferably 121 to 218 kg / m 3 .

減水剤としては、リグニン系、ナフタレンスルホン酸系、アミノスルホン酸系、ポリカルボン酸系の減水剤、高性能減水剤、高性能AE減水剤等を使用することができる。低水セメント比での流動性確保の観点から、減水剤として、ポリカルボン酸系の減水剤、高性能減水剤又は高性能AE減水剤を用いることが好ましく、ポリカルボン酸系の高性能減水剤を用いることがより好ましい。本実施形態に係るペースト組成物は、セメントとシリカフュームの合量100質量部に対して、減水剤を好ましくは0.5〜6.0質量部、より好ましくは1.0〜4.0質量部、更に好ましくは1.8〜3.0質量部、特に好ましくは2.0〜3.0質量部含む。また、ペースト組成物1m当たりの減水剤の単位量は、好ましくは6〜83kg/m、より好ましくは13〜55kg/m、更に好ましくは18〜42kg/mである。 As the water reducing agent, lignin-based, naphthalenesulfonic acid-based, aminosulfonic acid-based, polycarboxylic acid-based water reducing agents, high-performance water reducing agents, high-performance AE water reducing agents, and the like can be used. From the viewpoint of ensuring fluidity at a low water cement ratio, it is preferable to use a polycarboxylic acid-based water reducing agent, a high-performance water reducing agent or a high-performance AE water reducing agent as the water reducing agent, and a polycarboxylic acid-based high-performance water reducing agent. It is more preferable to use In the paste composition according to this embodiment, the water reducing agent is preferably 0.5 to 6.0 parts by mass, more preferably 1.0 to 4.0 parts by mass with respect to 100 parts by mass of the total amount of cement and silica fume. More preferably, it contains 1.8 to 3.0 parts by mass, particularly preferably 2.0 to 3.0 parts by mass. Moreover, the unit amount of the water reducing agent per 1 m 3 of the paste composition is preferably 6 to 83 kg / m 3 , more preferably 13 to 55 kg / m 3 , and still more preferably 18 to 42 kg / m 3 .

消泡剤としては、特殊非イオン配合型界面活性剤、ポリアルキレン誘導体、疎水性シリカ、ポリエーテル系等が挙げられる。この場合、セメントとシリカフュームの合量100質量部に対して、消泡剤を好ましくは0.01〜2.0質量部、より好ましくは0.02〜1.5質量部、更に好ましくは0.03〜1.0質量部含む。また、ペースト組成物1m当たりの消泡剤の単位量は、好ましくは0.10〜28kg/m、より好ましくは0.20〜21kg/m、更に好ましくは0.40〜14kg/mである。 Examples of antifoaming agents include special nonionic compounding surfactants, polyalkylene derivatives, hydrophobic silica, and polyethers. In this case, the antifoaming agent is preferably 0.01 to 2.0 parts by weight, more preferably 0.02 to 1.5 parts by weight, and still more preferably 0.000 parts by weight with respect to 100 parts by weight of the total amount of cement and silica fume. Including 03 to 1.0 parts by mass. The unit amount of the antifoaming agent per 1 m 3 of the paste composition is preferably 0.10 to 28 kg / m 3 , more preferably 0.20 to 21 kg / m 3 , and still more preferably 0.40 to 14 kg / m. 3 .

膨張材としては、金属粉、カルシウムサルフォアルミネート(CSA系)及びCaOを主成分とする石灰系などの膨張材を使用することができる。カルシウムサルフォアルミネート系膨張材としては、アウインを挙げることができ、特にエリントガイトを生成する膨張材が好ましい。石灰系膨張材としては、生石灰、生石灰―石膏混合系及び仮焼ドロマイト等を挙げることができ、中でも生石灰及び/又は生石灰―石膏混合系が好ましい。これらの膨張材は1種を単独で、又は2種以上を併用して使用することができる。   As the expansion material, metal powder, calcium sulfoaluminate (CSA type), and a lime type expansion material mainly composed of CaO can be used. An example of the calcium sulfoaluminate-based expansion material is Auin, and in particular, an expansion material that generates elintite is preferable. Examples of the lime-based expansion material include quick lime, quick lime-gypsum mixed system, and calcined dolomite, among which quick lime and / or quick lime-gypsum mixed system are preferable. These expanding materials can be used alone or in combination of two or more.

膨張材の含有量は、ペースト組成物1m当たり、好ましくは5〜40kg、より好ましくは10〜35kg、更に好ましくは15〜35kg、特に好ましくは20〜35kgである。含有量が少ないと膨張性に寄与せず、含有量が多いと過剰膨張するため、好ましくない。 The content of the expansion material is preferably 5 to 40 kg, more preferably 10 to 35 kg, still more preferably 15 to 35 kg, and particularly preferably 20 to 35 kg per 1 m 3 of the paste composition. When the content is small, it does not contribute to the expansibility, and when the content is large, it is excessively expanded, which is not preferable.

無機質微粉末としては、石灰石粉、珪石粉、砕石粉、スラグ粉等の微粉末を使用することができる。無機質微粉末は、石灰石粉、珪石粉、砕石粉、スラグ粉等をブレーン比表面積が2500cm/g以上となるまで粉砕又は分級した微粉末であり、ペースト組成物の流動性を改善することできる。無機質微粉末のブレーン比表面積は3000〜5000cm/gであることが好ましく、3200〜4500cm/gであることがより好ましく、3400〜4300cm/gであることが更に好ましく、3600〜4300cm/gであることが特に好ましい。 As the inorganic fine powder, fine powder such as limestone powder, quartzite powder, crushed stone powder, and slag powder can be used. The fine inorganic powder is a fine powder obtained by pulverizing or classifying limestone powder, silica powder, crushed stone powder, slag powder, etc. until the Blaine specific surface area is 2500 cm 2 / g or more, and can improve the fluidity of the paste composition. . Preferably Blaine specific surface area of the powder inorganic fine powder is 3000~5000cm 2 / g, more preferably 3200~4500cm 2 / g, more preferably in a 3400~4300cm 2 / g, 3600~4300cm 2 / G is particularly preferable.

本実施形態に係る無機質微粉末を混合したときに、その混合物は、粒径0.15mm以下の粒群を86〜100質量%、かつ、粒径0.075mm以下の粒群を70質量%以上含有する。粒径0.15mm以下の粒群は、好ましくは88〜100質量%、より好ましくは90〜100質量%、更に好ましくは92〜100質量%含まれる。粒径0.15mm以下の粒群が85質量%より少ないと、繊維が絡みやすく、均一に分散せず、硬化体が不均一になるおそれがある。また、粒径0.075mm以下の粒群は、好ましくは75質量%以上、より好ましくは80質量%以上、さらに好ましくは85質量%以上含まれる。粒径0.075mm以下の粒群が70質量%より少ないと、繊維が絡みやすくファイバーボールができやすくなる恐れがある。   When the inorganic fine powder according to the present embodiment is mixed, the mixture is composed of 86 to 100% by mass of a particle group having a particle size of 0.15 mm or less, and 70% by mass or more of a particle group having a particle size of 0.075 mm or less. contains. The particle group having a particle size of 0.15 mm or less is preferably contained in an amount of 88 to 100% by mass, more preferably 90 to 100% by mass, and still more preferably 92 to 100% by mass. If the particle group having a particle size of 0.15 mm or less is less than 85% by mass, the fibers are easily entangled, and are not uniformly dispersed, and the cured product may be non-uniform. Moreover, the particle group having a particle size of 0.075 mm or less is preferably contained by 75% by mass or more, more preferably 80% by mass or more, and further preferably 85% by mass or more. If the number of particles having a particle size of 0.075 mm or less is less than 70% by mass, fibers may be easily entangled and a fiber ball may be easily formed.

本実施形態に係る無機質微粉末は、セメント及びシリカフュームの合計量100質量部に対して、10〜60質量部含むことが好ましく、より好ましくは20〜60質量部、更に好ましくは30〜60質量部、特に好ましくは40〜60質量部である。セメント及びシリカフュームの合計量100質量部に対し、無機質微粉末が10質量部未満又は60質量部より多いと、流動性が悪くなる傾向にある。   The inorganic fine powder according to this embodiment preferably contains 10 to 60 parts by mass, more preferably 20 to 60 parts by mass, and still more preferably 30 to 60 parts by mass with respect to 100 parts by mass of the total amount of cement and silica fume. Especially preferably, it is 40-60 mass parts. When the amount of inorganic fine powder is less than 10 parts by mass or more than 60 parts by mass with respect to 100 parts by mass of the total amount of cement and silica fume, the fluidity tends to deteriorate.

高張力繊維としては、金属繊維、炭素繊維、アラミド繊維等が挙げられる。金属繊維として、鋼繊維、ステンレス繊維、アモルファス合金繊維等を使用することができる。高張力繊維の繊維径は0.05〜1.20mmが好ましく、0.08〜0.70mmがより好ましく、0.10〜0.35mmが更に好ましく、0.12〜0.20mmが特に好ましい。高張力繊維の繊維長は3〜60mmが好ましく、5〜35mmがより好ましく、7〜20mmが更に好ましく、9〜15mmが特に好ましい。高張力繊維のアスペクト比(繊維長/繊維径)は40〜250が好ましく、50〜200がより好ましく、60〜170が更に好ましく、70〜140が特に好ましい。高張力繊維の引張強度は100〜10000N/mmが好ましく、500〜5000N/mmより好ましく、2000〜3000N/mmが更に好ましく、1500〜2500N/mmが特に好ましい。高張力繊維の密度は、1〜20g/cmが好ましく、3〜15g/cmがより好ましく、5〜10g/cmが更に好ましい。このような高張力繊維を用いることで、ペースト組成物に高いじん性、高い圧縮強度、高い引張強度及び高い流動性を付与しやすくなる。 Examples of the high-tensile fiber include metal fiber, carbon fiber, and aramid fiber. As the metal fiber, steel fiber, stainless steel fiber, amorphous alloy fiber, or the like can be used. The fiber diameter of the high-tensile fiber is preferably 0.05 to 1.20 mm, more preferably 0.08 to 0.70 mm, still more preferably 0.10 to 0.35 mm, and particularly preferably 0.12 to 0.20 mm. The fiber length of the high-tensile fiber is preferably 3 to 60 mm, more preferably 5 to 35 mm, still more preferably 7 to 20 mm, and particularly preferably 9 to 15 mm. The aspect ratio (fiber length / fiber diameter) of the high-tensile fiber is preferably 40 to 250, more preferably 50 to 200, still more preferably 60 to 170, and particularly preferably 70 to 140. The tensile strength of the high strength fiber is preferably 100~10000N / mm 2, preferably from 500~5000N / mm 2, more preferably 2000~3000N / mm 2, 1500~2500N / mm 2 is particularly preferred. The density of high-tensile fibers, preferably from 1 to 20 g / cm 3, more preferably 3 to 15 g / cm 3, more preferably 5 to 10 g / cm 3. By using such a high tension fiber, it becomes easy to impart high toughness, high compressive strength, high tensile strength and high fluidity to the paste composition.

本実施形態に係るペースト組成物は、ペースト組成物に対して外割りで(すなわち、ペースト組成物における、高張力繊維を除いた組成物100体積%に対して)高張力繊維を好ましくは0.3〜5.0体積%、より好ましくは0.5〜4.0体積%、更に好ましくは1.0〜2.5体積%、特に好ましくは1.5〜2.5体積%含むことによって、高いじん性が得られやすくなる。なお、5.0体積%を超えるとペースト組成物の練混ぜが困難になる場合がある。また、ペースト組成物1mに対する高張力繊維の配合量は、好ましくは23〜393kg、より好ましくは39〜314kg、更に好ましくは79〜196kgである。 The paste composition according to the present embodiment preferably has a high-strength fiber of 0.00% on an external basis with respect to the paste composition (that is, with respect to 100% by volume of the composition excluding the high-tensile fiber in the paste composition). By containing 3 to 5.0% by volume, more preferably 0.5 to 4.0% by volume, still more preferably 1.0 to 2.5% by volume, particularly preferably 1.5 to 2.5% by volume, High toughness is easily obtained. In addition, when it exceeds 5.0 volume%, kneading | mixing of a paste composition may become difficult. The amount of high-tensile fibers of the paste composition 1 m 3 is preferably 23~393Kg, more preferably 39~314Kg, more preferably 79~196Kg.

また、本実施形態に係るペースト組成物は、セメントとシリカフュームの合量100質量部に対して、水を好ましくは10〜25質量部、より好ましくは12〜20質量部、更に好ましくは13〜18質量部、特に好ましくは15〜18質量部含む。ペースト組成物1m当たりの単位水量は、好ましくは137〜344kg/m、より好ましくは165〜275kg/m、更に好ましくは178〜248kg/mである。 Moreover, the paste composition according to the present embodiment is preferably 10 to 25 parts by mass, more preferably 12 to 20 parts by mass, and still more preferably 13 to 18 parts by mass of water with respect to 100 parts by mass of the total amount of cement and silica fume. Part by mass, particularly preferably 15 to 18 parts by mass is included. The unit water amount per 1 m 3 of the paste composition is preferably 137 to 344 kg / m 3 , more preferably 165 to 275 kg / m 3 , and still more preferably 178 to 248 kg / m 3 .

本実施形態に係るペースト組成物には、必要に応じて、収縮低減剤、凝結促進剤、凝結遅延剤、増粘剤、ガラス繊維、合成樹脂粉末、ポリマーエマルジョン、ポリマーディスパージョン等を1種以上添加してもよい。   The paste composition according to this embodiment includes one or more shrinkage reducing agents, setting accelerators, setting retarders, thickeners, glass fibers, synthetic resin powders, polymer emulsions, polymer dispersions, and the like as necessary. It may be added.

(モルタル組成物)
本実施形態のモルタル組成物は、上述した本実施形態のペースト組成物と細骨材を含むものである。
(Mortar composition)
The mortar composition of the present embodiment includes the paste composition of the present embodiment and the fine aggregate described above.

細骨材としては、特に制限されないが、川砂、陸砂、海砂、砕砂、珪砂、石灰石骨材、高炉スラグ細骨材、フェロニッケルスラグ細骨材、銅スラグ細骨材、電気炉酸化スラグ細骨材等を使用することができる。なお、細骨材の粒度は、10mmふるいを全部通り、5mmふるいを85質量%以上通過するものが好ましい。   The fine aggregate is not particularly limited, but river sand, land sand, sea sand, crushed sand, quartz sand, limestone aggregate, blast furnace slag fine aggregate, ferronickel slag fine aggregate, copper slag fine aggregate, electric furnace oxidation slag Fine aggregates can be used. The fine aggregate preferably has a particle size of passing through a 10 mm sieve and passing through a 5 mm sieve by 85% by mass or more.

細骨材と無機質微粉末の混合物は、粒径0.15mm以下の粒群を40〜80質量%、好ましくは45〜80質量%含み、より好ましくは50〜75質量%含む。また、上記混合物は、粒径0.075mm以下の粒群を30〜80質量%、好ましくは35〜70質量%含み、より好ましくは40〜65質量%含む。無機質微粉末の含有量が30質量%以下では、スラリーの粘性が低すぎるため高張力繊維が十分に分散しない恐れがある。   The mixture of fine aggregate and inorganic fine powder contains 40 to 80% by mass, preferably 45 to 80% by mass, and more preferably 50 to 75% by mass of a particle group having a particle size of 0.15 mm or less. Moreover, the said mixture contains 30-80 mass% of particle groups with a particle size of 0.075 mm or less, Preferably it contains 35-70 mass%, More preferably, it contains 40-65 mass%. When the content of the inorganic fine powder is 30% by mass or less, since the viscosity of the slurry is too low, the high tension fiber may not be sufficiently dispersed.

細骨材と無機質微粉末の混合物は、セメント及びシリカフュームの合計量100質量部に対して、細骨材を10〜60質量部、無機質微粉末を10〜60質量部含むことが好ましく、細骨材を15〜30質量部、無機質微粉末を15〜30質量部含むことがより好ましく、細骨材を20〜30質量部、無機質微粉末を20〜30質量部含むことが更に好ましい。また、モルタル組成物1m当たりの細骨材及び無機質微粉末の混合物の単位量は、好ましくは140〜980kg/m、より好ましくは300〜900kg/m、更に好ましくは600〜900kg/mである。 The mixture of fine aggregate and inorganic fine powder preferably contains 10 to 60 parts by mass of fine aggregate and 10 to 60 parts by mass of inorganic fine powder with respect to 100 parts by mass of the total amount of cement and silica fume. More preferably, the material contains 15-30 parts by mass, the inorganic fine powder 15-30 parts by mass, the fine aggregate 20-30 parts by mass, and the inorganic fine powder 20-30 parts by mass. The unit amount of the mixture of fine aggregate and inorganic fine powder per 1 m 3 of the mortar composition is preferably 140 to 980 kg / m 3 , more preferably 300 to 900 kg / m 3 , still more preferably 600 to 900 kg / m. 3 .

さらに、上記実施形態に係るモルタル組成物に、粗骨材を適量組み合わせることにより、コンクリートを調製してもよい。粗骨材の量や、水の量は、目標圧縮強度、じん性、目標スランプに応じて適時変えればよい。粗骨材としては、砂利、砕石、石灰石骨材、高炉スラグ粗骨材、電気炉酸化スラグ粗骨材等を使用することができる。また、5mmの篩いに85質量%以上留まる粗骨材がより好ましい。   Furthermore, concrete may be prepared by combining an appropriate amount of coarse aggregate with the mortar composition according to the above embodiment. The amount of coarse aggregate and the amount of water may be changed as appropriate according to the target compressive strength, toughness, and target slump. As the coarse aggregate, gravel, crushed stone, limestone aggregate, blast furnace slag coarse aggregate, electric furnace oxidized slag coarse aggregate and the like can be used. Moreover, the coarse aggregate which stays 85 mass% or more on a 5 mm sieve is more preferable.

本実施形態に係るペースト組成物又はモルタル組成物の製造方法は、特に限定されないが、水、減水剤及び高張力繊維(有機繊維を配合する場合は有機繊維も)以外の材料の一部又は全部を予め混合しておき、次に、水、減水剤を添加してミキサに入れて練り混ぜることによって製造することが好ましい。また、繊維材料は、ペースト組成物またはモルタル組成物を製造した後にミキサに添加し、更に練り混ぜることが好ましい。モルタル組成物の練混ぜに使用するミキサは特に限定されず、モルタル用ミキサ、二軸強制練りミキサ、パン型ミキサ、グラウトミキサ等を使用することができる。   Although the manufacturing method of the paste composition or mortar composition which concerns on this embodiment is not specifically limited, A part or all of materials other than water, a water reducing agent, and a high tension fiber (When an organic fiber is mix | blended also an organic fiber) It is preferable to prepare by mixing in advance and then adding water and a water reducing agent, mixing in a mixer. The fiber material is preferably added to the mixer after the paste composition or mortar composition is produced, and further kneaded. The mixer used for kneading the mortar composition is not particularly limited, and a mortar mixer, a biaxial forced kneading mixer, a pan-type mixer, a grout mixer, and the like can be used.

上記実施形態におけるペースト組成物又はモルタル組成物は、高強度が求められるPC梁、高耐久性パネル、ブロック耐震壁などに有効である。また、高張力繊維を添加することによって、橋梁等の鉄筋量を減らすことが可能となる。さらに、橋梁の補修・補強等にも有効である。   The paste composition or mortar composition in the above embodiment is effective for PC beams, high durability panels, block earthquake resistant walls and the like that require high strength. Moreover, it becomes possible to reduce the amount of reinforcing bars, such as a bridge, by adding a high tension fiber. It is also effective for repairing and reinforcing bridges.

以上、本実施形態のペースト組成物及びモルタル組成物によれば、高じん性を有しつつ、常温養生のみで早期に高い圧縮強度を発現でき、かつ、自己収縮ひずみを低減できる。   As mentioned above, according to the paste composition and mortar composition of this embodiment, while having high toughness, high compressive strength can be expressed at an early stage only by normal temperature curing, and self-shrinkage strain can be reduced.

以下、実施例及び比較例を挙げて本発明の内容をより具体的に説明する。なお、本発明は下記実施例に限定されるものではない。   Hereinafter, the contents of the present invention will be described more specifically with reference to examples and comparative examples. In addition, this invention is not limited to the following Example.

[使用材料の準備]
実施例及び比較例のペースト組成物又はモルタル組成物を作製するために、以下に示す材料を準備した。
[Preparation of materials used]
In order to prepare paste compositions or mortar compositions of Examples and Comparative Examples, the following materials were prepared.

(1)セメント(C):
石灰石、珪石、スラグ、石炭灰、建設発生土、銅ガラミ等の原料を調合し、キルンで焼成した後、石膏を加えて粉砕することにより、ポルトランドセメントを調製した。得られたセメントの化学成分を、JIS R 5202‐2010「セメントの化学分析方法」に従って測定し、鉱物組成を下記のボーグ式により算出した。得られたセメントの鉱物組成を表1に示す。
S量=(4.07×CaO)−(7.60×SiO)−(6.72×Al)−(1.43×Fe)−(2.85×SO
S量=(2.87×SiO)−(0.754×CS)
A量=(2.65×Al)−(1.69×Fe
AF量=3.04×Fe
(1) Cement (C):
Portland cement was prepared by blending raw materials such as limestone, silica stone, slag, coal ash, construction generated soil, copper gravel, etc., calcining with kiln, adding gypsum and grinding. The chemical components of the obtained cement were measured according to JIS R 5202-2010 “Cement chemical analysis method”, and the mineral composition was calculated by the following Borg equation. The mineral composition of the obtained cement is shown in Table 1.
C 3 S amount = (4.07 × CaO) − (7.60 × SiO 2 ) − (6.72 × Al 2 O 3 ) − (1.43 × Fe 2 O 3 ) − (2.85 × SO 3 )
C 2 S amount = (2.87 × SiO 2 ) − (0.754 × C 3 S)
C 3 A amount = (2.65 × Al 2 O 3 ) − (1.69 × Fe 2 O 3 )
C 4 AF amount = 3.04 × Fe 2 O 3

また、得られたセメントの45μmふるい残分を、セメント協会標準試験方法 JCAS K−02「45μm網ふるいによるセメントの粉末度試験方法」に準じて測定した。また、ブレーン比表面積をJIS R 5201−1997「セメントの物理試験方法」に準じて測定した。結果を表1に示す。   Moreover, the 45-micrometer sieve residue of the obtained cement was measured according to Cement Association standard test method JCAS K-02 "The test method of the fineness of the cement by a 45-micrometer mesh sieve". Further, the specific surface area of the brane was measured according to JIS R 5201-1997 “Physical Test Method for Cement”. The results are shown in Table 1.

(2)シリカフューム(SF):平均粒子径0.24μm
シリカフュームの平均粒子径は、レーザー回折/散乱式粒子径分布測定装置(堀場製作所製、商品名「LA−950V2」)を用いて測定した粒子径分布より、粒子径−通過分積算%曲線を算出し、粒子径−通過分積算%曲線より通過分積算が50体積%となる粒子径を求めた。試料分散媒は0.2%ヘキサメタリン酸ナトリウム水溶液を用い、測定前に出力600Wのホモジナイザーにて10分間分散処理した。粒度分布の演算はMie散乱理論に従った。粒子屈折率は1.45−0.00i、溶媒屈折率は1.333とした。各粒度の通過分積算(体積%)を表2に示す。
(2) Silica fume (SF): average particle size 0.24 μm
The average particle size of silica fume is calculated from a particle size distribution measured using a laser diffraction / scattering particle size distribution measuring device (trade name “LA-950V2” manufactured by Horiba, Ltd.), and a particle size-passage integrated% curve is calculated. Then, the particle diameter at which the accumulated amount of the passage was 50% by volume was determined from the particle diameter-accumulated amount of passage% curve. A 0.2% sodium hexametaphosphate aqueous solution was used as a sample dispersion medium, and the sample was dispersed for 10 minutes with a homogenizer with an output of 600 W before measurement. The calculation of the particle size distribution followed Mie scattering theory. The particle refractive index was 1.45-0.00i, and the solvent refractive index was 1.333. Table 2 shows the accumulated amount (volume%) of each particle size.

(3)無機質微粉末
(A)珪石粉:密度2.62g/cm、ブレーン比表面積3820cm/g
(B)石灰石微粉末:密度2.71g/cm、ブレーン比表面積4280cm/g
(3) Inorganic fine powder (A) Silica powder: density 2.62 g / cm 3 , Blaine specific surface area 3820 cm 2 / g
(B) Limestone fine powder: density 2.71 g / cm 3 , Blaine specific surface area 4280 cm 2 / g

(4)細骨材
砕砂:密度2.62g/cm、粗粒率2.80
(4) Fine aggregate Crushed sand: density 2.62 g / cm 3 , coarse particle ratio 2.80

上記無機質微粉末及び細骨材の粒度を、JIS A 1102−2006「骨材のふるい分け試験方法」を参考として測定した。次いで、無機質微粉末、又は無機質微粉末と細骨材を混合して所定の粒度になるように調整した。結果を表3に示す。   The particle sizes of the inorganic fine powder and the fine aggregate were measured with reference to JIS A 1102-2006 “Aggregate Screening Test Method”. Subsequently, the inorganic fine powder, or the inorganic fine powder and the fine aggregate were mixed to adjust to a predetermined particle size. The results are shown in Table 3.

(5)減水剤:ポリカルボン酸系高性能減水剤(固形分濃度25質量%)
(6)消泡剤:特殊非イオン配合型界面活性剤
消泡剤中のPOP、POE及びアルキル鎖の構造単位のモル比を表4に示す。
(5) Water reducing agent: polycarboxylic acid-based high-performance water reducing agent (solid content concentration 25% by mass)
(6) Antifoaming agent: special nonionic compounding type surfactant Table 4 shows the molar ratio of the structural units of POP, POE and alkyl chain in the antifoaming agent.

(7)膨張材:市販3銘柄(A、B、C)を使用した。なお、銘柄AはN−EX(商品名;太平洋マテリアル社製、石灰系膨張材)、銘柄Bはハイパーエクスパン(商品名;太平洋マテリアル社製、石灰系膨張材)、銘柄CはパワーCSA(商品名;電気化学工業社製、カルシウムサルフォアルミネート系膨張材)である。 (7) Expansion material: Three commercially available brands (A, B, C) were used. Brand A is N-EX (trade name; manufactured by Taiheiyo Materials Co., Ltd., lime-based expansion material), Brand B is Hyper Expand (trade name; Taiheiyo Materials Co., Ltd., lime-based expansion material), and Brand C is Power CSA ( Product name; manufactured by Denki Kagaku Kogyo Co., Ltd., calcium sulfoaluminate-based expansion material).

(8)高張力繊維:鋼繊維(東京製綱社製、商品名「CW9416」)、密度:7.87g/cm、繊維径0.16mm、繊維長13mm、アスペクト比81.25、引張強度2200N/mm
(9)練混ぜ水(W):上水道水
(8) High tensile fiber: Steel fiber (trade name “CW9416”, manufactured by Tokyo Tsuna Co., Ltd.), density: 7.87 g / cm 3 , fiber diameter 0.16 mm, fiber length 13 mm, aspect ratio 81.25, tensile strength 2200 N / mm 2
(9) Mixing water (W): Tap water

[ペースト組成物又はモルタル組成物の作製]
ペースト組成物又はモルタル組成物の作製を、表5の配合組成に基づき、以下の通りに行った。
[Preparation of paste composition or mortar composition]
Preparation of the paste composition or the mortar composition was performed as follows based on the formulation composition of Table 5.

セメント、膨張材、シリカフューム、消泡剤、無機質微粉末および細骨材をコンクリート用二軸ミキサに加え、30秒間撹拌した。次に、減水剤を含む練混ぜ水をミキサ内に投入して10分間撹拌し、さらに、鋼繊維を投入して3分間撹拌し、実施例1〜6及び比較例1〜2のペースト組成物、並びに、実施例7〜9及び比較例3のモルタル組成物を作製した。   Cement, expansion material, silica fume, antifoaming agent, fine inorganic powder and fine aggregate were added to the concrete biaxial mixer and stirred for 30 seconds. Next, the mixing water containing the water reducing agent is put into the mixer and stirred for 10 minutes, and further, the steel fibers are added and stirred for 3 minutes, and the paste compositions of Examples 1 to 6 and Comparative Examples 1 and 2 are used. And the mortar composition of Examples 7-9 and the comparative example 3 was produced.

[ペースト組成物又はモルタル組成物の評価]
(1)フレッシュ性状
(試験方法)
実施例1〜6及び比較例1〜2のペースト組成物、並びに、実施例7〜9及び比較例3のモルタル組成物を用いて、スランプフローを測定した。スランプフローは、JIS A 1150−2007「コンクリートのスランプフロー試験方法」に準じ、測定した。
[Evaluation of Paste Composition or Mortar Composition]
(1) Fresh properties (test method)
The slump flow was measured using the paste compositions of Examples 1 to 6 and Comparative Examples 1 and 2, and the mortar compositions of Examples 7 to 9 and Comparative Example 3. The slump flow was measured according to JIS A 1150-2007 “Concrete slump flow test method”.

(2)強度試験
実施例1〜6及び比較例1〜2のペースト組成物、並びに、実施例7〜9及び比較例3のモルタル組成物を用いて、JIS A 1132−2006「コンクリートの強度試験用供試体の作り方」に準じて5cm×10cmの円柱供試体を作製し、JIS A 1108−2006「コンクリートの圧縮強度試験方法」に準じて圧縮強度試験を行った。供試体は試験材齢まで20℃で水中養生した。
(2) Strength Test Using the paste compositions of Examples 1 to 6 and Comparative Examples 1 to 2 and the mortar compositions of Examples 7 to 9 and Comparative Example 3, JIS A 1132-2006 “Concrete Strength Test 5 cm × 10 cm cylindrical specimens were produced according to “How to make specimens for use”, and a compressive strength test was conducted according to JIS A 1108-2006 “Concrete compressive strength test method”. The specimen was cured in water at 20 ° C. until the test material age.

(3)自己収縮
実施例1〜6及び比較例1〜2のペースト組成物、並びに、実施例7〜9及び比較例3のモルタル組成物を、埋込型ゲージ(東京測器研究所製)を中心に配した10×10×40cm型枠(鋼製)に打設し、自己収縮ひずみを計測した。なお、型枠面内側にはスチレンボードとポリテトラフルオロエチレンシートを配し、ペーストまたはモルタルが拘束を受けない状態で測定を行い、測定終了までは封緘状態を保った。
(3) Self-shrinkage The paste compositions of Examples 1 to 6 and Comparative Examples 1 and 2, and the mortar compositions of Examples 7 to 9 and Comparative Example 3 were embedded gauges (manufactured by Tokyo Sokki Kenkyujo). Was placed in a 10 × 10 × 40 cm formwork (made of steel) placed at the center, and the self-shrinkage strain was measured. In addition, a styrene board and a polytetrafluoroethylene sheet were arranged on the inner side of the mold surface, and measurement was performed in a state where the paste or mortar was not restrained, and the sealed state was maintained until the measurement was completed.

(評価結果)
表6に、スランプフロー試験、圧縮強度試験及び自己収縮測定の結果を示す。また、実施例1〜6及び比較例1〜2のペースト組成物、並びに、実施例7〜9及び比較例3のモルタル組成物の材齢182日後における自己収縮ひずみを図1に示す。
(Evaluation results)
Table 6 shows the results of the slump flow test, the compressive strength test, and the self-shrinkage measurement. Moreover, the self-shrinkage distortion | strain after 182 days of age of the paste composition of Examples 1-6 and Comparative Examples 1-2 and the mortar composition of Examples 7-9 and Comparative Example 3 is shown in FIG.

表6に示すとおり、実施例1〜9では、スランプフロー及び圧縮強度が良好であり、自己収縮ひずみも小さくなった。   As shown in Table 6, in Examples 1 to 9, the slump flow and the compressive strength were good, and the self-shrinkage strain was also small.

これに対し、比較例1〜3では、自己収縮ひずみが大きくなった。   On the other hand, in Comparative Examples 1 to 3, the self-shrinkage strain was increased.

Claims (10)

セメントと、シリカフュームと、水と、減水剤と、消泡剤と、膨張材と、無機質微粉末と、高張力繊維とを含むペースト組成物であって、
前記セメントは、CSを40.0〜75.0質量%及びCAを2.7質量%未満含有し、かつ、45μmふるい残分が25.0質量%未満であり、
前記無機質微粉末が、石灰石粉、珪石粉、砕石粉及びスラグ粉からなる群より選ばれる少なくとも1種の微粉末を含有し、
前記無機質微粉末を混合したときに、その混合物は、粒径0.15mm以下の粒群を86〜100質量%、かつ、粒径0.075mm以下の粒群を70質量%以上含有する、ペースト組成物。
A paste composition comprising cement, silica fume, water, a water reducing agent, an antifoaming agent, an expansion material, an inorganic fine powder, and a high-tensile fiber,
The cement contains 40.0-75.0% by mass of C 3 S and less than 2.7% by mass of C 3 A, and a 45 μm sieve residue is less than 25.0% by mass,
The inorganic fine powder contains at least one fine powder selected from the group consisting of limestone powder, quartzite powder, crushed stone powder, and slag powder;
When the inorganic fine powder is mixed, the mixture contains 86-100% by mass of particle groups having a particle size of 0.15 mm or less and 70% by mass or more of particle groups having a particle size of 0.075 mm or less. Composition.
前記無機質微粉末のブレーン比表面積が3000〜5000cm/gである、請求項1に記載のペースト組成物。 The paste composition according to claim 1, wherein the inorganic fine powder has a Blaine specific surface area of 3000 to 5000 cm 2 / g. 前記セメント及び前記シリカフュームの合計量100質量部に対して、前記無機質微粉末を10〜60質量部含む、請求項1又は2に記載のペースト組成物。   The paste composition according to claim 1 or 2, comprising 10 to 60 parts by mass of the inorganic fine powder with respect to 100 parts by mass of the total amount of the cement and the silica fume. 前記シリカフュームの平均粒子径が0.05〜2.0μmである、請求項1〜3のいずれか1項に記載のペースト組成物。   The paste composition according to any one of claims 1 to 3, wherein an average particle size of the silica fume is 0.05 to 2.0 µm. 前記セメント及び前記シリカフュームの合計量を基準として、前記シリカフュームを3〜30質量%含む、請求項1〜4のいずれか1項に記載のペースト組成物。   The paste composition according to any one of claims 1 to 4, comprising 3 to 30% by mass of the silica fume based on a total amount of the cement and the silica fume. 前記セメント及び前記シリカフュームの合計量100質量部に対して、前記水を10〜25質量部、前記減水剤を0.5〜6.0質量部含む、請求項1〜5のいずれか1項に記載のペースト組成物。   In any one of Claims 1-5 containing 10-25 mass parts of said water and 0.5-6.0 mass parts of said water reducing agents with respect to 100 mass parts of total amounts of the said cement and the said silica fume. The paste composition as described. 前記高張力繊維は、引張強度が100〜10000N/mm、アスペクト比が40〜250であり、前記ペースト組成物に対する含有率が0.3〜5.0体積%である、請求項1〜6のいずれか1項に記載のペースト組成物。 The high-strength fiber has a tensile strength of 100 to 10000 N / mm 2 , an aspect ratio of 40 to 250, and a content of 0.3 to 5.0% by volume with respect to the paste composition. The paste composition according to any one of the above. 前記高張力繊維は、金属繊維、炭素繊維及びアラミド繊維からなる群より選ばれる1種以上の繊維である、請求項1〜7のいずれか1項に記載のペースト組成物。   The paste composition according to any one of claims 1 to 7, wherein the high-tensile fibers are one or more fibers selected from the group consisting of metal fibers, carbon fibers, and aramid fibers. 前記膨張材の含有量が5〜40kg/mである、請求項1〜8のいずれか1項に記載のペースト組成物。 The paste composition according to any one of claims 1 to 8, wherein the content of the expansion material is 5 to 40 kg / m 3 . 請求項1〜9のいずれか1項記載のペースト組成物と、細骨材とを含むモルタル組成物。
The mortar composition containing the paste composition of any one of Claims 1-9, and a fine aggregate.
JP2012156844A 2012-07-12 2012-07-12 Paste composition Active JP6063159B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2012156844A JP6063159B2 (en) 2012-07-12 2012-07-12 Paste composition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2012156844A JP6063159B2 (en) 2012-07-12 2012-07-12 Paste composition

Publications (2)

Publication Number Publication Date
JP2014019586A true JP2014019586A (en) 2014-02-03
JP6063159B2 JP6063159B2 (en) 2017-01-18

Family

ID=50194900

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2012156844A Active JP6063159B2 (en) 2012-07-12 2012-07-12 Paste composition

Country Status (1)

Country Link
JP (1) JP6063159B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016211160A (en) * 2015-04-30 2016-12-15 株式会社大林組 Spray method for fiber-reinforced material

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06100338A (en) * 1992-09-18 1994-04-12 Mitsubishi Materials Corp Highly fluid cement
JPH1160316A (en) * 1997-08-20 1999-03-02 Sumitomo Osaka Cement Co Ltd High strength non-shrinkable mortar composition
JPH11130508A (en) * 1997-10-30 1999-05-18 Taiheiyo Cement Corp Cement-based composition and its hardened body
JP2000143313A (en) * 1998-11-10 2000-05-23 Taiheiyo Cement Corp Cement additive and cement composition
JP2002338323A (en) * 2001-03-08 2002-11-27 Taiheiyo Cement Corp Hydraulic composition
JP2005067945A (en) * 2003-08-22 2005-03-17 Ps Mitsubishi Construction Co Ltd Super-high strength high toughness mortar
JP2008214147A (en) * 2007-03-06 2008-09-18 Ube Ind Ltd Cement composition for highly flowable concrete and highly flowable concrete composition
JP2011042534A (en) * 2009-08-21 2011-03-03 Ohbayashi Corp High toughness-high strength mortar composition

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06100338A (en) * 1992-09-18 1994-04-12 Mitsubishi Materials Corp Highly fluid cement
JPH1160316A (en) * 1997-08-20 1999-03-02 Sumitomo Osaka Cement Co Ltd High strength non-shrinkable mortar composition
JPH11130508A (en) * 1997-10-30 1999-05-18 Taiheiyo Cement Corp Cement-based composition and its hardened body
JP2000143313A (en) * 1998-11-10 2000-05-23 Taiheiyo Cement Corp Cement additive and cement composition
JP2002338323A (en) * 2001-03-08 2002-11-27 Taiheiyo Cement Corp Hydraulic composition
JP2005067945A (en) * 2003-08-22 2005-03-17 Ps Mitsubishi Construction Co Ltd Super-high strength high toughness mortar
JP2008214147A (en) * 2007-03-06 2008-09-18 Ube Ind Ltd Cement composition for highly flowable concrete and highly flowable concrete composition
JP2011042534A (en) * 2009-08-21 2011-03-03 Ohbayashi Corp High toughness-high strength mortar composition

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
コンクリート便覧, vol. 第二版, JPN6016022960, 1996, pages 478 - 479, ISSN: 0003339976 *
コンクリート混和材料ハンドブック, JPN6016006055, 2004, pages 78 - 90, ISSN: 0003260576 *
コンクリート混和材料ハンドブック, JPN6016022962, 2004, pages 469, ISSN: 0003339977 *
鶴田昌宏他: "細骨材の一部を石灰石微粉末で置換したコンクリートの諸物性", コンクリート工学年次論文集, vol. 26, no. 1, JPN6016022965, 2004, pages 99 - 104, ISSN: 0003339978 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016211160A (en) * 2015-04-30 2016-12-15 株式会社大林組 Spray method for fiber-reinforced material

Also Published As

Publication number Publication date
JP6063159B2 (en) 2017-01-18

Similar Documents

Publication Publication Date Title
Memon et al. Effect of silica fume on the fresh and hardened properties of fly ash-based self-compacting geopolymer concrete
JP5336300B2 (en) High toughness and high strength mortar composition
JP6022747B2 (en) High strength mortar composition
JP2018104287A (en) High-strength cement mortar composition
JP5702608B2 (en) High strength mortar composition
JP6205843B2 (en) High-strength cement paste composition and method for producing high-strength cement paste hardened body
Karthikeyan et al. Application on partial substitute of cement by bentonite in concrete
JP6031281B2 (en) Paste composition
JP5863253B2 (en) High toughness and high strength mortar composition
JP5735288B2 (en) High strength paste composition
JP6023488B2 (en) Paste composition
Ghrici et al. Influence of limestone dust and natural pozzolan on engineering properties of self-compacting repair mortars
JP6063159B2 (en) Paste composition
JP6012290B2 (en) High toughness and high strength mortar composition
JP5997807B2 (en) High strength mortar composition
JP5592807B2 (en) High toughness and high strength mortar composition
JP5612504B2 (en) High strength mortar composition
JP5815250B2 (en) Mortar composition
JP5592806B2 (en) High toughness and high strength mortar composition
JP5731848B2 (en) High strength paste composition
JP5768092B2 (en) High toughness and high strength mortar composition
JP6072873B2 (en) Mortar composition
Srishaila et al. Influence of fly ash and silica fumes on rheology and mechanical properties of Self Compacting Concrete
Jaya et al. A Comparative Study between Reactive Powder Concrete and High Performance Concrete
Narasimha Prasad et al. Effect of Microfines on the Mechanical Properties of Cement Mortar and Concrete

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20150427

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20160212

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20160223

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20160422

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20160621

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20160916

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20160920

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20161024

A911 Transfer to examiner for re-examination before appeal (zenchi)

Free format text: JAPANESE INTERMEDIATE CODE: A911

Effective date: 20161115

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20161213

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20161216

R150 Certificate of patent or registration of utility model

Ref document number: 6063159

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250