JP2005119885A - High strength mortar composition - Google Patents
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- JP2005119885A JP2005119885A JP2003353319A JP2003353319A JP2005119885A JP 2005119885 A JP2005119885 A JP 2005119885A JP 2003353319 A JP2003353319 A JP 2003353319A JP 2003353319 A JP2003353319 A JP 2003353319A JP 2005119885 A JP2005119885 A JP 2005119885A
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- 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
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
Description
本発明は、少量の水で練り混ぜても流動性が高く、且つ硬化すると高強度モルタルが得られるモルタル組成物に関するものである。 The present invention relates to a mortar composition that has high fluidity even when kneaded with a small amount of water, and can obtain a high-strength mortar when cured.
近年、建築物の超高層化、大規模化及び複雑化の傾向が進み、これらの建築物を建築する等のために、圧縮強度が８０Ｎ／ｍｍ2以上の高強度モルタルが求められている。モルタルの強度を増大するための従来の方法としては、モルタル中の水のセメントに対する重量比、すなわち水セメント比を低減していくことが最も簡便な方法である。しかしながら、この水セメント比を低減すると、低減に伴って流動性が著しく低下してしまい、モルタル強度の向上が得られても、実際の作業性が著しく悪化するという問題があった。一方、コンクリートの強度を高める方法として、セメントクリンカー骨材を衝撃破砕してから粒度調整をして使用することが知られている（特許文献１）。しかし、単に該セメントクリンカー骨材を用いただけでは、コンクリートの強度は得られるものの、モルタルの流動性は得られない。更に、セメント、高炉スラグ微粉末等のセメント系無機粉体及び球状スラグ骨材等を用いて高強度モルタル組成物を得る方法が知られている（特許文献２）。しかしながら、この方法で用いる球状スラグ骨材は、高温溶融スラグを風冷処理して製造する特殊なものであって、汎用的ではない。 In recent years, there has been a tendency for buildings to become super high-rise, large-scale, and complicated, and high-strength mortar with a compressive strength of 80 N / mm 2 or more is required to construct these buildings. As a conventional method for increasing the strength of the mortar, the simplest method is to reduce the weight ratio of water to cement in the mortar, that is, the water cement ratio. However, when the water cement ratio is reduced, the fluidity is remarkably lowered with the reduction, and there is a problem that the actual workability is remarkably deteriorated even if the improvement of the mortar strength is obtained. On the other hand, as a method for increasing the strength of concrete, it is known to use the cement clinker aggregate after impact crushing and adjusting the particle size (Patent Document 1). However, merely using the cement clinker aggregate can provide the strength of the concrete but not the fluidity of the mortar. Furthermore, a method of obtaining a high-strength mortar composition using cement-based inorganic powder such as cement and blast furnace slag fine powder and spherical slag aggregate is known (Patent Document 2). However, the spherical slag aggregate used in this method is a special one produced by subjecting high-temperature molten slag to air cooling, and is not general-purpose.
本発明の目的は、容易に入手できる原材料を用いて、低い水セメント比で製造しても流動性が高く、且つ硬化体の材齢２８日における圧縮強度が８０Ｎ／ｍｍ2以上の高強度モルタルが得られるモルタル組成物を提供することにある。 The object of the present invention is to provide a high-strength mortar having a high fluidity even when manufactured at a low water-cement ratio, using raw materials that are readily available, and having a compressive strength at 28 days of age of the cured product of 80 N / mm 2 or more. Is to provide a mortar composition.
本発明者は、低い水セメント比でも流動性がよく、且つその硬化体が高強度であるモルタル組成物を鋭意研究したところ、セメントと粒状セメントクリンカー並びに減水剤、超微粉又は特定の骨材を含有するモルタル組成物が、上記課題を悉く解決することを見出し、本発明を完成した。 The present inventor has intensively studied a mortar composition having good fluidity even at a low water cement ratio and having a high strength as a hardened body. The present inventors have found that the mortar composition to be contained solves the above problems.
すなわち、本発明は、次の成分（Ａ）、（Ｂ）並びに（Ｃ）：
（Ａ）セメント、
（Ｂ）粒状セメントクリンカー、並びに
（Ｃ）減水剤、超微粉及び比重２．７以上の骨材から選ばれる1種又は２種以上
を含有することを特徴とするモルタル組成物を提供するものである。
That is, the present invention includes the following components (A), (B) and (C):
(A) cement,
A mortar composition comprising (B) a granular cement clinker, and (C) one or more selected from a water reducing agent, ultrafine powder and an aggregate having a specific gravity of 2.7 or more is provided. is there.
本発明のモルタル組成物を用いると、水セメント比が低い場合においても流動性が高く、且つその硬化体の材齢２８日における圧縮強度が８０Ｎ／ｍｍ2以上という高い強度を有し、更に骨材等の材料分離を起こさないモルタルが得られる。本発明のモルタル組成物は、高強度が要求されるグラウトモルタル、高強度のセルフレベリング材、高強度のモルタル板等に好適に使用することができる。また、更に膨張材を併用すると、高強度の無収縮グラウトモルタルとして好適に使用することができる。 When the mortar composition of the present invention is used, even when the water-cement ratio is low, the fluidity is high, and the cured product has a high strength of 80 N / mm 2 or more at the age of 28 days. Mortar that does not cause separation of materials such as wood can be obtained. The mortar composition of the present invention can be suitably used for grout mortars requiring high strength, high strength self-leveling materials, high strength mortar plates, and the like. Further, when an expansion material is used in combination, it can be suitably used as a high-strength non-shrink grout mortar.
本発明で使用する成分（Ａ）のセメントとしては、普通、早強、超早強、低熱及び中庸熱等の各種ポルトランドセメント、並びにこれらポルトランドセメントに、フライアッシュ、高炉スラグ、シリカ、石灰石微粉末等を混合した各種混合セメント等が挙げられる。更に、カルシウムアルミネート、カルシウムサルホアルミネート、アルミノ珪酸カルシウム、或いはこれらの酸化カルシウム及び／又は酸化アルミニウムの一部がアルカリ金属酸化物、カルシウム以外のアルカリ土類金属酸化物、酸化ケイ素、酸化チタン、酸化鉄、アルカリ金属ハロゲン化物、アルカリ土類金属ハロゲン化物、アルカリ金属硫酸塩又はアルカリ土類金属硫酸塩等と置換又はこれらが少量固溶した物質を主成分とする急硬セメントも使用することができる。また、上記ポルトランドセメント、混合セメント、急硬セメントを併用することもできる。 As the cement of the component (A) used in the present invention, various portland cements such as ordinary, early strength, ultra-early strength, low heat and moderate heat, and fly ash, blast furnace slag, silica, limestone fine powder, etc. Various mixed cements in which etc. are mixed. Furthermore, calcium aluminate, calcium sulfoaluminate, calcium aluminosilicate, or a part of these calcium oxide and / or aluminum oxide is an alkali metal oxide, an alkaline earth metal oxide other than calcium, silicon oxide, titanium oxide, It is also possible to use a hardened cement whose main component is a substance in which iron oxide, alkali metal halide, alkaline earth metal halide, alkali metal sulfate or alkaline earth metal sulfate is substituted or a small amount thereof is dissolved. it can. Moreover, the above-mentioned Portland cement, mixed cement, and quick-hardening cement can be used in combination.
本発明で使用する成分（Ｂ）の粒状セメントクリンカーは、鉱物を主体とした原料物質が加熱により一部又は全部が溶融、冷却して塊状となった水硬性を有する塊状物である。この水硬性塊状物の原料物質としては、例えば、ポルトランドセメント、アルミナセメント、膨張セメント、急硬セメント、エコセメント、その他特殊セメント等の原料となるセメントクリンカーが挙げられる。 The granular cement clinker of the component (B) used in the present invention is a massive material having hydraulic properties in which a raw material mainly composed of mineral is partially or entirely melted and cooled by heating to become a massive shape. Examples of the raw material for the hydraulic block include cement clinker which is a raw material for Portland cement, alumina cement, expanded cement, rapid hardening cement, eco cement, and other special cements.
本発明の粒状セメントクリンカーとしては、この水硬性塊状物をそのまま使用、該塊状物を破砕して得られるものを使用又は破砕しない該塊状物と該塊状物を破砕したものを併用してもよい。塊状物を破砕して得られた粒状セメントクリンカーは、塊状物内部の多孔質部分や亀裂等の脆弱な部分が破壊されて、強度上、欠陥の少ない粒状セメントクリンカーが得られ、モルタルの強度が高くなるので好適である。
塊状物の破砕手段としては、遠心力衝撃破砕機、高圧ローラーミル、ハンマークラッシャー、インパクトクラッシャー等の破砕機が使用できる。
As the granular cement clinker of the present invention, this hydraulic block may be used as it is, the block obtained by crushing the block, or a block obtained by crushing the block and a block obtained by crushing the block may be used in combination. . In the granular cement clinker obtained by crushing the lump, the porous part inside the lump and fragile parts such as cracks are destroyed, resulting in a granular cement clinker with few defects in strength and the strength of the mortar. Since it becomes high, it is suitable.
As a mass crushing means, crushing machines such as a centrifugal impact crusher, a high-pressure roller mill, a hammer crusher, and an impact crusher can be used.
粒状セメントクリンカーの粒径は０．６ｍｍを超え４ｍｍ以下、更に０．６ｍｍを超え２．５ｍｍ以下、特に０．６ｍｍを超え２ｍｍ以下であるのが好ましい。０．６ｍｍ以下の粒径のものは、添加によりモルタルの流動性が極度に低下するので、好ましい流動性を得るための練り混ぜ水量が多く必要なため、添加してもモルタルが高強度にならない場合がある。４ｍｍを超えるものは、小間隙への充填性に支障を生じる場合があるため好ましくない。ここで、粒径は、ＪＩＳ Ａ １１０２−１９９９（骨材のふるい分け試験方法）に従って測定した値を用いる。 The particle size of the granular cement clinker is preferably more than 0.6 mm and less than 4 mm, more preferably more than 0.6 mm and less than 2.5 mm, particularly preferably more than 0.6 mm and less than 2 mm. When the particle size is 0.6 mm or less, the flowability of the mortar is extremely reduced by the addition, so a large amount of kneading water is required to obtain a preferable fluidity, so even if added, the mortar does not become high strength. There is a case. Those exceeding 4 mm are not preferable because they may impede the filling of small gaps. Here, the value measured according to JIS A 1102-1999 (Aggregate screening test method) is used as the particle size.
粒状セメントクリンカーは、骨材の全部又は一部として使用することができるが、含有量はモルタル組成物の全骨材１００重量部中の少なくとも２０重量部以上、特に４０〜８０重量部であることが好ましい。２０重量部未満では強度発現の点で充分な効果が得られない場合がある。
また、粒状セメントクリンカーは、セメント１００重量部に対して、２０〜３００重量部、更に５０〜１００重量部、特に５０〜２５０重量部であるのが好ましい。２０重量部未満では強度が充分得られない場合がある。また、３００重量部を超えると流動性が得られない場合がある。
The granular cement clinker can be used as the whole or a part of the aggregate, but the content is at least 20 parts by weight, particularly 40 to 80 parts by weight, in 100 parts by weight of the total aggregate of the mortar composition. Is preferred. If it is less than 20 parts by weight, a sufficient effect may not be obtained in terms of strength development.
The granular cement clinker is preferably 20 to 300 parts by weight, more preferably 50 to 100 parts by weight, and particularly preferably 50 to 250 parts by weight with respect to 100 parts by weight of cement. If it is less than 20 parts by weight, sufficient strength may not be obtained. Moreover, when it exceeds 300 weight part, fluidity | liquidity may not be acquired.
本発明で使用する成分（Ｃ）は、減水剤、超微粉及び比重２．７以上の骨材から選ばれる１種又は２種以上である。これらは、成分（Ｂ）と相俟って、水と練り混ぜた際のモルタルの流動性を改善する。 Component (C) used in the present invention is one or more selected from a water reducing agent, ultrafine powder, and an aggregate having a specific gravity of 2.7 or more. These, together with component (B), improve the fluidity of the mortar when kneaded with water.
成分（Ｃ）の減水剤は、一般に使用される減水剤の他に、ＡＥ減水剤、高性能減水剤、高性能ＡＥ減水剤、流動化剤等と呼ばれているものを含むものである。減水剤の成分は、特に限定されるものでなく、例えば、β−ナフタレンスルホン酸ホルムアルデヒド縮合物の塩、メラミンスルホン酸ホルムアルデヒド縮合物の塩、リグニンスルホン酸塩及びポリカルボン酸塩等が挙げられる。減水剤としては、モルタルの流動性保持の点でβ−ナフタレンスルホン酸ホルムアルデヒド縮合物の塩を主成分とするものが好ましい。
減水剤の形態は、粉末及び液体のものがあるがどちらを用いてもよく、また両者を併用してもよい。
本発明のモルタル組成物中の減水剤の含有量は、セメント及び超微粉の合計重量１００重量部に対し、減水剤が減水剤成分として０．１〜４重量部、特に１〜３重量部であるのが好ましい。０．１重量部未満では減水剤を添加してもモルタルの流動性が向上効果が充分でない場合がある。２重量部を超えて使用すると混練時に連行される空気量が多くなり材料分離し易くなる傾向があるため好ましくない。
The water reducing agent of component (C) includes what is called an AE water reducing agent, a high performance water reducing agent, a high performance AE water reducing agent, a fluidizing agent and the like in addition to a commonly used water reducing agent. The component of the water reducing agent is not particularly limited, and examples thereof include a salt of β-naphthalene sulfonic acid formaldehyde condensate, a salt of melamine sulfonic acid formaldehyde condensate, lignin sulfonate, and polycarboxylate. As a water reducing agent, the thing which has the salt of (beta) -naphthalenesulfonic acid formaldehyde condensate as a main component from the point of the fluidity | liquidity maintenance of a mortar is preferable.
The form of the water reducing agent may be either powder or liquid, but either one may be used, or both may be used in combination.
The content of the water reducing agent in the mortar composition of the present invention is such that the water reducing agent is 0.1 to 4 parts by weight, particularly 1 to 3 parts by weight, as a water reducing agent component, with respect to 100 parts by weight of the total weight of cement and ultrafine powder. Preferably there is. If the amount is less than 0.1 part by weight, the effect of improving the fluidity of the mortar may not be sufficient even if a water reducing agent is added. If the amount exceeds 2 parts by weight, the amount of air entrained during kneading tends to increase and the material tends to be separated, which is not preferable.
成分（Ｃ）の超微粉は、平均粒径１．０μｍ以下の粉末であって、成分的な制限は特にないが、水に易溶性のものは適当でない。具体的には、シリコン、シリコン合金、ジルコニアを製造する際に副生するシリカ質ダスト（シリカフューム）、フライアッシュ、炭酸カルシウム微粉末、シリカゾル、酸化チタン、高炉スラグ微粉末等が挙げられる。これらのうち、一般にシリカ質ダスト（シリカフューム）は、その平均粒径が１．０μｍ以下であり粉砕等をする必要がないので本発明の成分（Ｃ）の超微粉として好適である。ここで、粒径は電子顕微鏡法で測定した値を使用する。
本発明のモルタル組成物中の超微粉の含有量は、セメント及び超微粉の合計重量１００重量部中に、３〜２０重量部、更に５〜２０重量部であるのが流動性及び圧縮強度の点から好ましい。
The ultrafine powder of component (C) is a powder having an average particle size of 1.0 μm or less, and there is no particular limitation on the components, but those that are readily soluble in water are not suitable. Specific examples include siliceous dust (silica fume), fly ash, calcium carbonate fine powder, silica sol, titanium oxide, and blast furnace slag fine powder that are by-produced when producing silicon, silicon alloys, and zirconia. Of these, siliceous dust (silica fume) is generally suitable as the ultrafine powder of the component (C) of the present invention because it has an average particle size of 1.0 μm or less and does not need to be pulverized. Here, the value measured by electron microscopy is used for the particle size.
The content of the ultrafine powder in the mortar composition of the present invention is 3 to 20 parts by weight, and further 5 to 20 parts by weight of the total weight of cement and ultrafine powder is 100 parts by weight. It is preferable from the point.
成分（Ｃ）の比重２．７以上の骨材（以下、重量骨材と記載する場合がある）としては、比重２．７以上のものであれば、特に制限されるものではなく、例えばステンレス鋼粉末（比重７．８）、鉄粒（比重７．０〜８．０）、磁鉄鉱（比重４．５〜５．２）、クロマイト（ＦｅＯ・Ｃｒ2Ｏ3：比重４．２〜４．８）、赤鉄鉱（比重４．０〜５．３）、砂鉄（比重４．０〜５．０）、バライト（重晶石、比重４〜４．７）、スピネル（ＭｇＡｌ2Ｏ4：比重３．５８）、電気炉酸化スラグ（比重３．１〜４．５）、カンラン岩（比重３．０〜３．３）、褐鉄鉱（比重２．７〜４．０）、転炉スラグ（比重２．７〜３．５）等が挙げられる。
重量骨材としては、比重が３．０〜５．０であるものがモルタルの流動性改善、且つ材料分離がし難い点で好ましい。
更に、粒径を０．１５ｍｍを超え０．６ｍｍ以下に調整して用いることで、重量骨材がモルタル中に均一に分散し易く、且つモルタルの流動性が増大するので好ましい。この粒径はＪＩＳ Ａ １１０２−１９９９（骨材のふるい分け試験方法）に従って測定した値である。粗粒率が２．０〜３．０の重量骨材を使用するのが、モルタルの流動性改善の点で好ましい。
The aggregate of component (C) having a specific gravity of 2.7 or higher (hereinafter sometimes referred to as heavy aggregate) is not particularly limited as long as it has a specific gravity of 2.7 or higher. steel powder (specific gravity 7.8), iron particles (specific gravity 7.0 to 8.0), magnetite (specific gravity 4.5 to 5.2), chromite (FeO · Cr 2 O 3: specific gravity from 4.2 to 4. 8), hematite (specific gravity 4.0 to 5.3), iron sand (specific gravity 4.0 to 5.0), barite (barite, specific gravity 4 to 4.7), spinel (MgAl 2 O 4 : specific gravity) 3.58), electric furnace oxidation slag (specific gravity 3.1-4.5), peridotite (specific gravity 3.0-3.3), limonite (specific gravity 2.7-4.0), converter slag (specific gravity) 2.7 to 3.5).
As the heavy aggregate, one having a specific gravity of 3.0 to 5.0 is preferable in terms of improving the fluidity of the mortar and hardly separating the material.
Furthermore, it is preferable to adjust the particle size to more than 0.15 mm and not more than 0.6 mm because the heavy aggregate is easily dispersed uniformly in the mortar and the fluidity of the mortar is increased. This particle size is a value measured according to JIS A 1102-1999 (Aggregate Screening Test Method). It is preferable to use a heavy aggregate having a coarse particle ratio of 2.0 to 3.0 in terms of improving the flowability of the mortar.
本発明のモルタル組成物中の重量骨材の含有量は、上記粒状セメントクリンカーを含む全骨材１００重量部中の８０重量部以下、更に２０〜６０重量部、特に４０〜５０重量部であることが好ましい。８０重量部を超えて使用すると、上記粒状セメントクリンカーの含有量が全骨材１００重量部中の２０重量部を下回るので充分な強度が得られない場合がある。 The content of the heavy aggregate in the mortar composition of the present invention is 80 parts by weight or less, more preferably 20 to 60 parts by weight, particularly 40 to 50 parts by weight in 100 parts by weight of the total aggregate including the granular cement clinker. It is preferable. When the amount exceeds 80 parts by weight, the content of the granular cement clinker is less than 20 parts by weight in 100 parts by weight of the total aggregate, so that sufficient strength may not be obtained.
成分（Ｃ）としては、減水剤、超微粉及び重量骨材から選ばれる１種又は２種以上が用いられるが、減水剤及び重量骨材を併用するのがより好ましく、減水剤、超微粉及び重量骨材の３者を併用するのが特に好ましい。 As the component (C), one or more selected from a water reducing agent, ultrafine powder and heavy aggregate is used, but it is more preferable to use a water reducing agent and heavy aggregate in combination, and a water reducing agent, ultrafine powder and It is particularly preferable to use a combination of three heavy aggregates.
本発明のモルタル組成物は、水を添加して使用する。添加する水の量はセメント及び超微粉の合計重量１００重量部に対し、２０〜４０重量部、特に２０〜３８重量部であるのが好ましい。２０重量部未満では流動性が低く、４０重量部を超えると充分な強度が得られない場合がある。 The mortar composition of the present invention is used after adding water. The amount of water to be added is preferably 20 to 40 parts by weight, particularly 20 to 38 parts by weight, based on 100 parts by weight of the total weight of cement and ultrafine powder. If it is less than 20 parts by weight, the fluidity is low, and if it exceeds 40 parts by weight, sufficient strength may not be obtained.
本発明のモルタル組成物に膨張材を併用すると、高強度の無収縮グラウトモルタル得られ好ましい。
本発明で使用する膨張材としては、生石灰や、生石灰とエーライト、カルシウムアルミノフェライト、カルシウムフェライト、アウイン、フッ化カルシウム、無水石膏等の群から選ばれる鉱物の１種又は２種以上を主要な鉱物として含有するものが挙げられる。市販のカルシウムサルフォアルミネート系や石灰系膨張材も使用することができる。
本発明のモルタル組成物中の膨張材の含有量は、セメント１００重量部に対して、０．５〜２０重量部、更に１〜１０重量部、特に１〜５重量部であることが、モルタル強度及び無収縮性の点で好ましい。
When an expansion material is used in combination with the mortar composition of the present invention, a high-strength non-shrink grout mortar is preferably obtained.
As the expansion material used in the present invention, one or more kinds of minerals selected from the group of quicklime, quicklime and alite, calcium aluminoferrite, calcium ferrite, auin, calcium fluoride, anhydrous gypsum and the like are mainly used. What is contained as a mineral is mentioned. Commercially available calcium sulfoaluminate or lime-based expansion materials can also be used.
The content of the expansion material in the mortar composition of the present invention is 0.5 to 20 parts by weight, more preferably 1 to 10 parts by weight, and particularly 1 to 5 parts by weight with respect to 100 parts by weight of cement. It is preferable in terms of strength and no shrinkage.
本発明の高強度モルタル組成物には、更に、本発明の効果をそこなわない範囲で必要に応じて、通常使用される成分、例えば増粘剤、収縮低減剤、硬化促進材、硬化遅延材、保水剤、セメント用ポリマー、消泡剤、発泡剤、防水剤、防錆剤、顔料、繊維、撥水剤、白華防止剤等の１種又は２種以上を併用してもよい。 The high-strength mortar composition of the present invention further includes components that are usually used as necessary within a range not detracting from the effects of the present invention, such as thickeners, shrinkage reducing agents, curing accelerators, and retarders. , Water retaining agents, polymers for cement, antifoaming agents, foaming agents, waterproofing agents, rust preventive agents, pigments, fibers, water repellents, whitening prevention agents and the like may be used in combination.
以下に、本発明について実施例を挙げて更に詳しく説明するが、本発明はこれらの実施例に限定されるものではない。 Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.
参考例：粒状セメントクリンカーの製造
普通ポルトランドセメントクリンカーを遠心力衝撃粉砕機により破砕し、ＪＩＳ Ｚ ８８０１（試験用篩い）に規定する公称目開き６００μｍ、１．１８ｍｍ、２．３６ｍｍの金属製網ふるいによりふるい分けを行い、粒径０．６を超え１．１８ｍｍ以下の粒状セメントクリンカーを作製した。
Reference Example: Production of Granular Cement Clinker Ordinary Portland cement clinker was crushed with a centrifugal impact crusher, and a metal mesh sieve with nominal openings of 600 μm, 1.18 mm and 2.36 mm as defined in JIS Z 8801 (test sieve). Thus, a granular cement clinker having a particle size of more than 0.6 and not more than 1.18 mm was produced.
実施例１〜１７
参考例で製造された粒状セメントクリンカー、普通ポルトランドセメント（太平洋セメント社製）、高性能減水剤（β−ナフタレンスルホン酸ホルムアルデヒド縮合物塩系高性能減水剤：花王社製「マイティー１００」）、（シリカ質ダスト（シリカフューム：シムコア社製）、石灰系膨張材（生石灰とエーライトを主要鉱物とする膨張材：太平洋マテリアル社製「太平洋エクスパン」）、クロマイト骨材（比重４．７，粗粒率Ｆ．Ｍ．＝２．３７，粒径；０．１５ｍｍを超え０．６ｍｍ以下）、カンラン岩骨材（比重３．２８，粗粒率Ｆ．Ｍ．＝２．８４、粒径；０．１５ｍｍを超え０．６ｍｍ以下）、石灰石砕砂（比重２．６，粗粒率Ｆ．Ｍ．＝２．７０）を使用し、表１に示す配合組成でモルタルを作製し、品質試験を実施した。
なお、表１中の値は、セメント及び超微粉の合計重量１００重量部に対する重量部である。
Examples 1-17
Granular cement clinker manufactured in Reference Example, ordinary Portland cement (manufactured by Taiheiyo Cement), high-performance water reducing agent (β-naphthalenesulfonic acid formaldehyde condensate salt type high-performance water reducing agent: “Mighty 100” manufactured by Kao Corporation), ( Silica dust (silica fume: manufactured by Simcore), lime-based expanded material (expanded material containing quick lime and alite as main minerals: “Pacific Expan” manufactured by Taiheiyo Materials), chromite aggregate (specific gravity 4.7, coarse particle ratio FM = 2.37, particle size; more than 0.15 mm and not more than 0.6 mm), peridotite aggregate (specific gravity 3.28, coarse particle rate FM = 2.84, particle size; 15 mm to 0.6 mm or less), limestone crushed sand (specific gravity 2.6, coarse particle rate FM = 2.70), mortar was prepared with the composition shown in Table 1, and the quality test was performed. .
The values in Table 1 are parts by weight relative to 100 parts by weight of the total weight of cement and ultrafine powder.
試験例 モルタルの品質試験
以下の方法で測定した品質試験の結果を表２に示す。
＜品質試験方法＞
フロー値： ＪＩＳ Ｒ ５２０１−１９９７（セメントの物理試験方法）１１．フロー
試験に準じて、１５回の落下運動を行わないでフロー値を測定した。
圧縮強度： 土木学会基準ＪＳＣＥ−Ｆ ５４１−１９９９（充てんモルタルの圧縮強度
試験方法）に従って、材齢２８日における圧縮強度を測定した。
膨張率： 土木学会基準ＪＳＣＥ−Ｆ５４２−１９９９（充てんモルタルのブリーディン
グ率および膨張率試験方法）に準じて、温度２０℃、湿度６０％における材齢１日の膨張率を測定した。
ブリーディング率： 土木学会基準ＪＳＣＥ−Ｆ５４２−１９９９（充てんモルタルのブ
リーディング率および膨張率試験方法）に従って、最終ブリーディング率を測定した。
Test Example Mortar Quality Test Table 2 shows the results of the quality test measured by the following method.
<Quality test method>
Flow value: JIS R 5201-1997 (physical test method for cement) 11. According to the flow test, the flow value was measured without performing 15 drop motions.
Compressive strength: Compressive strength at a material age of 28 days was measured according to JSCE-F 541-1999 (Method for testing compressive strength of filled mortar).
Expansion rate: According to the Japan Society of Civil Engineers JSCE-F542-1999 (filling mortar bleeding rate and expansion rate test method), the daily expansion rate at a temperature of 20 ° C. and a humidity of 60% was measured.
Bleeding rate: The final bleeding rate was measured according to Japan Society of Civil Engineers standard JSCE-F542-1999 (Bleeding rate and expansion rate test method of filled mortar).
本発明のモルタル組成物は、練り混ぜ直後のモルタルのフロー値が２００ｍｍ以上と高い流動性及び材齢２８日の圧縮強度が８０Ｎ／ｍｍ2以上と高い強度を有し、且つブリーディングが無い。 The mortar composition of the present invention has a flowability of mortar immediately after kneading as high as 200 mm or higher, a compressive strength at 28 days of age as high as 80 N / mm 2 or more, and no bleeding.
Claims (6)
（Ａ）セメント、
（Ｂ）粒状セメントクリンカー、並びに
（Ｃ）減水剤、超微粉及び比重２．７以上の骨材から選ばれる1種又は２種以上
を含有することを特徴とするモルタル組成物。 The following components (A), (B) and (C):
(A) cement,
A mortar composition comprising (B) a granular cement clinker, and (C) one or more selected from a water reducing agent, an ultrafine powder, and an aggregate having a specific gravity of 2.7 or more.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007161507A (en) * | 2005-12-12 | 2007-06-28 | Taiheiyo Material Kk | Highly durable cross-section repairing material |
| JP2008094679A (en) * | 2006-10-13 | 2008-04-24 | Denki Kagaku Kogyo Kk | Grout composition and grout material using the same |
| KR101054858B1 (en) | 2009-06-17 | 2011-08-05 | 주식회사 동진산업 | Manufacturing method of eco-friendly dry cement mortar and eco-friendly dry cement mortar manufactured |
| JP2013147391A (en) * | 2012-01-20 | 2013-08-01 | Taiheiyo Cement Corp | Cement composition and cement-based hardened body |
| JP2018068238A (en) * | 2016-11-01 | 2018-05-10 | デンカ株式会社 | Weed-proof material and method of using the same |
| JP2021147276A (en) * | 2020-03-19 | 2021-09-27 | 太平洋セメント株式会社 | Concrete composition |
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| CN105198336A (en) * | 2015-11-17 | 2015-12-30 | 广西云燕特种水泥建材有限公司 | Seashore building cement resisting strong wind and big waves |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007161507A (en) * | 2005-12-12 | 2007-06-28 | Taiheiyo Material Kk | Highly durable cross-section repairing material |
| JP2008094679A (en) * | 2006-10-13 | 2008-04-24 | Denki Kagaku Kogyo Kk | Grout composition and grout material using the same |
| JP4538438B2 (en) * | 2006-10-13 | 2010-09-08 | 電気化学工業株式会社 | Grout composition and grout material using the same |
| KR101054858B1 (en) | 2009-06-17 | 2011-08-05 | 주식회사 동진산업 | Manufacturing method of eco-friendly dry cement mortar and eco-friendly dry cement mortar manufactured |
| JP2013147391A (en) * | 2012-01-20 | 2013-08-01 | Taiheiyo Cement Corp | Cement composition and cement-based hardened body |
| JP2018068238A (en) * | 2016-11-01 | 2018-05-10 | デンカ株式会社 | Weed-proof material and method of using the same |
| JP2021147276A (en) * | 2020-03-19 | 2021-09-27 | 太平洋セメント株式会社 | Concrete composition |
| JP7392946B2 (en) | 2020-03-19 | 2023-12-06 | 太平洋セメント株式会社 | concrete composition |
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