JP2003286062A - Dry type premix mortar composition - Google Patents
Dry type premix mortar compositionInfo
- Publication number
- JP2003286062A JP2003286062A JP2002093009A JP2002093009A JP2003286062A JP 2003286062 A JP2003286062 A JP 2003286062A JP 2002093009 A JP2002093009 A JP 2002093009A JP 2002093009 A JP2002093009 A JP 2002093009A JP 2003286062 A JP2003286062 A JP 2003286062A
- Authority
- JP
- Japan
- Prior art keywords
- sand
- blast furnace
- furnace slag
- mortar composition
- fine aggregate
- 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
Links
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】本発明は細骨材として高炉ス
ラグ加工砂を用いた新規なドライ型プレミックスモルタ
ル組成物に関するものである。TECHNICAL FIELD The present invention relates to a novel dry type premix mortar composition using blast furnace slag processed sand as fine aggregate.
【０００２】[0002]
【従来の技術】セメントモルタルは、セメントに細骨材
として砂を配合し、水を加え混練して調製されたもの
で、細骨材の砂をセメントペーストで凝結、接合して強
度を発生させる作用を有している。このセメントモルタ
ルには、水２５〜３０質量％を含む堅練モルタルと、水
６０〜７０質量％を含む柔練モルタルがあるが、水を加
える前のドライ型のものがいわゆるプレミックスモルタ
ルである。2. Description of the Related Art Cement mortar is prepared by blending cement with sand as fine aggregate, adding water and kneading, and the sand of fine aggregate is condensed and cemented with cement paste to generate strength. Has an effect. This cement mortar includes hard mortar containing 25 to 30% by mass of water and soft mortar containing 60 to 70% by mass of water. A dry type before adding water is a so-called premix mortar. .
【０００３】このドライ型プレミックスモルタルに細骨
材として配合する砂は、一般に川砂、海砂、山砂などの
天然砂を粒度調整したもの、又は摩砕加工し、粒度調整
したものが用いられ、主としてタイル下地材、タイル張
付材、目地材などとして使用されている。The sand to be added to this dry type premix mortar as fine aggregate is generally natural sand such as river sand, sea sand or mountain sand whose particle size has been adjusted or which has been subjected to grinding and particle size adjustment. , Is mainly used as a tile base material, a tile adhering material, and a joint material.
【０００４】ところで、近年、自然環境保護の観点か
ら、天然砂の採取は制限され、それとともにその供給量
は漸次減少の傾向があるため、それに代るべき細骨材の
供給源の開拓が要望されている。By the way, in recent years, from the viewpoint of protecting the natural environment, the collection of natural sand is restricted, and the supply amount thereof tends to decrease gradually. Therefore, it is desired to develop a supply source of fine aggregates to replace it. Has been done.
【０００５】一方、鉄鋼生産時に副生する高炉スラグに
ついての実用化研究が行われ、これまでに埋立材、路盤
材などの建設、土木用資材として利用することの外、溶
融スラグを水や空気により急冷したのち粒度調整したも
のをコンクリート用細骨材として使用することも提案さ
れているが、単に粒度調整するだけでは、粒子形状が角
張ったものになり、モルタルに配合した場合、作業性低
下の原因となるため、ドライ型プレミックスの細骨材と
して天然砂の代りに用いることはできなかった。On the other hand, practical studies have been conducted on blast furnace slag produced as a by-product during steel production, and the molten slag has been used not only for construction of landfill materials, roadbed materials and civil engineering materials, but also for water and air. Although it has been proposed to use a fine aggregate for concrete after quenching with the above method as a fine aggregate for concrete, just adjusting the grain size results in an angular particle shape, and when blended in a mortar, workability decreases. Therefore, it could not be used as a fine aggregate of dry type premix instead of natural sand.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、このような
実情に鑑み、高炉スラグの粗砕物を自生摩砕して、粒度
調整とともに、粒形改善を行って、天然砂に匹敵する物
性を備えた高炉スラグ加工砂を製造し、これを用いて新
規なドライ型プレミックスモルタル組成物を提供するこ
とを目的としてなされたものである。SUMMARY OF THE INVENTION In view of the above situation, the present invention self-mills a crushed blast furnace slag to improve the grain size and improve the grain shape to obtain physical properties comparable to natural sand. It was made for the purpose of producing the provided blast furnace slag processed sand and providing a new dry type premix mortar composition using the sand.
【０００７】[0007]
【課題を解決するための手段】本発明者らは、ドライ型
プレミックスモルタルに配合する細骨材として、天然砂
と代替可能な高炉スラグ砂を開発するために鋭意研究を
重ねた結果、所定の見掛け比重をもち、所定の粒度範囲
内に分級された高炉スラグを原料として用い、これを破
砕して得た粗砕物を、自生摩砕すなわち生成した粒子同
士を擦り合わせて摩砕し、心円率及び実積率を向上させ
ることにより天然砂に匹敵する物性をもち、プレミック
スモルタルの細骨材として使用可能な高炉スラグ加工砂
が得られることを見出し、この知見に基づいて本発明を
なすに至った。Means for Solving the Problems As a result of intensive studies to develop blast furnace slag sand that can replace natural sand as a fine aggregate to be mixed with dry type premix mortar, the present inventors The crushed blast furnace slag, which has an apparent specific gravity of 3 and is classified as a raw material, is used as a raw material. It has been found that a blast furnace slag processed sand that can be used as a fine aggregate of premix mortar can be obtained with physical properties comparable to natural sand by improving the circularity and the actual volume, and the present invention is based on this finding. It came to eggplant.
【０００８】すなわち、本発明は、セメント成分及び細
骨材からなるプレミックスモルタル組成物において、細
骨材として、見掛け比重２．２０以上で粒径２．５ｍｍ
以下の高炉スラグ粗砕物を自生摩砕処理して得られる、
心円率７０％以上、実積率５５％以上の高炉スラグ加工
砂を用いることを特徴とするドライ型プレミックスモル
タル組成物を提供するものである。That is, the present invention relates to a premix mortar composition comprising a cement component and fine aggregate, and as the fine aggregate, an apparent specific gravity of 2.20 or more and a particle diameter of 2.5 mm.
Obtained by autogenous grinding of the following blast furnace slag coarsely crushed products,
A dry premix mortar composition characterized by using blast-furnace slag processed sand having a core ratio of 70% or more and an actual volume ratio of 55% or more.
【０００９】[0009]
【発明の実施の形態】本発明のドライ型プレミックスモ
ルタル組成物は、セメント成分と細骨材としての高炉ス
ラグ加工砂からなっている。このセメント成分は、従来
の細骨材として天然砂を用いたドライ型プレミックスモ
ルタル組成物におけるセメント成分と同じであり、特に
制限はない。このようなセメント成分としては、例え
ば、ポルトランドセメント、高炉セメント、シリカセメ
ント、フライアッシュセメントのほか、白色セメントや
アルミナセメントのような特殊セメントなどがある。こ
れらのセメント成分は、通常平均粒径２０μｍ、好まし
くは１０μｍの粉末として用いられる。このセメント成
分は、所望に応じ強度の強化及び成形後の長さ変化の抑
制のためにセッコウを含ませることができる。この際の
セッコウの配合割合は、セメント成分の質量に基づき
０．１〜１０質量％、好ましくは１〜５質量％の範囲内
で選ばれる。BEST MODE FOR CARRYING OUT THE INVENTION The dry type premix mortar composition of the present invention comprises a cement component and blast furnace slag processed sand as fine aggregate. This cement component is the same as the cement component in the conventional dry type premix mortar composition using natural sand as fine aggregate, and is not particularly limited. Examples of such cement components include portland cement, blast furnace cement, silica cement, fly ash cement, and special cement such as white cement and alumina cement. These cement components are usually used as a powder having an average particle size of 20 μm, preferably 10 μm. The cement component may optionally contain gypsum for strengthening strength and suppressing length changes after molding. The mixing ratio of gypsum at this time is selected within the range of 0.1 to 10% by mass, preferably 1 to 5% by mass based on the mass of the cement component.
【００１０】次に、セメント成分に細骨材として配合さ
れる高炉スラグ加工砂は、天然砂の場合と同等又はそれ
以上の品質を保証するためには、心円率７０％以上、実
積率５５％以上、好ましくは６０％以上のものでなけれ
ばならない。このような高炉スラグ加工砂は、高炉スラ
グを破砕して得た、見掛け比重２．２０以上、好ましく
は２．４０以上で、粒径２．５ｍｍ以下の高炉スラグ粗
砕物を原料として用いる。この破砕は、例えばジョーク
ラッシャー、ジャイレトリークラッシャー、ドッジクラ
ッシャー、エッジランナー、ハンマーミル、ディスクク
ラッシャー、ロータリークラッシャー、ボールミル、コ
ニカルミル、アトリションミルなどを用いて行うことが
できるが、ロール間隙を変えることにより、粒度範囲を
容易に調整しうるという点でダブルロールクラッシャー
を用いるのが有利である。Next, the blast-furnace slag-processed sand, which is added to the cement component as fine aggregate, has a core ratio of 70% or more and an actual volume ratio in order to guarantee quality equal to or higher than that of natural sand. It should be above 55%, preferably above 60%. Such blast-furnace slag-processed sand is obtained by crushing blast-furnace slag and having a specific gravity of 2.20 or more, preferably 2.40 or more, and a crushed blast-furnace slag having a particle diameter of 2.5 mm or less is used as a raw material. This crushing can be performed by using, for example, a jaw crusher, a gyratory crusher, a dodge crusher, an edge runner, a hammer mill, a disc crusher, a rotary crusher, a ball mill, a conical mill, an attrition mill, etc., but changing the roll gap. Therefore, it is advantageous to use the double roll crusher in that the particle size range can be easily adjusted.
【００１１】この際、原料として見掛け比重２．２０以
上の高炉スラグ粗砕物を用いることが必要であり、これ
よりも低い見掛け比重のものを用いると、心円率や実積
率を天然砂に匹敵する程度まで高めることができない。
このような原料としては、例えば高炉から排出される溶
融スラグを水で急冷して得られる高炉水砕スラグや高炉
から排出される溶融スラグを徐冷して得られる高炉徐冷
スラグの粗砕物を挙げることができる。At this time, it is necessary to use a blast furnace slag coarsely crushed material having an apparent specific gravity of 2.20 or more as a raw material. It cannot be raised to a comparable level.
As such a raw material, for example, a blast furnace granulated slag obtained by quenching molten slag discharged from a blast furnace with water or a blast furnace slowly cooled slag obtained by gradually cooling molten slag discharged from a blast furnace is used. Can be mentioned.
【００１２】この高炉スラグ粗砕物は、次に自生摩砕処
理して、心円率７０％以上、実積率５５％以上に加工さ
れる。この自生摩砕処理は、例えば円筒状の回転式摺動
摩砕機を用い、高炉スラグ粒子同士を擦り合わせて摩砕
することにより行われる。この際、原料の高炉スラグは
含水率２〜９質量％、好ましくは３〜４質量％の湿潤状
態で行うのが、より摩砕効率を高めることができるので
好ましい。含水率が２質量％未満の乾燥状態では十分な
摩砕効果が得られないし、また含水率が５質量％を超え
ると粒子表面が水膜で覆われ、粒子同士の擦り合わせが
妨害される。This blast furnace slag coarsely crushed product is then subjected to self-grinding to be processed so that the eccentricity is 70% or more and the actual volume ratio is 55% or more. This self-grinding treatment is performed, for example, by using a cylindrical rotary sliding mill to rub and ground the blast furnace slag particles. At this time, it is preferable that the raw material blast furnace slag is carried out in a wet state having a water content of 2 to 9% by mass, preferably 3 to 4% by mass because the milling efficiency can be further enhanced. When the water content is less than 2% by mass, a sufficient grinding effect cannot be obtained, and when the water content exceeds 5% by mass, the surface of the particles is covered with a water film and the rubbing of the particles is disturbed.
【００１３】本発明においては、このようにして得られ
る心円率７０％以上、実積率５５％以上の高炉スラグ加
工砂を用いることが必要である。この心円率は、コンピ
ューターマイクロスコープを用いて粒子投撮図の同一粒
径のもの１０個について面積（Ａｍｍ2）及び最大径
（Ｌｍｍ）測定し、以下の式により求めることができ
る。
Ａｍｍ2を心円とした半径Ｒ（ｍｍ）＝√Ａ／√π
心円率（％）＝Ｒ／０．５Ｌ×１００
また、実積率は、ＪＩＳ Ａ１１１１の規定に従い、高
炉スラグ加工砂を、直径１４０ｍｍ、高さ１３０ｍｍの
円筒容器に充填し、高炉スラグ加工砂の全体積（Ｖ）が
容器の全体積（Ｖ´）に占める割合（％）を求めること
によって得られる。In the present invention, it is necessary to use the blast-furnace slag-processed sand thus obtained, which has a circularity of 70% or more and an actual volume of 55% or more. This eccentricity can be determined by the following formula by measuring the area (Amm 2 ) and maximum diameter (Lmm) of 10 particles having the same particle size in the projection image of the particles using a computer microscope. Radius R (mm) with Amm 2 as the center circle = √A / √π Center circle ratio (%) = R / 0.5L × 100 Further, the actual volume ratio is in accordance with JIS A1111, and the blast furnace slag processing sand is It is obtained by filling a cylindrical container having a diameter of 140 mm and a height of 130 mm and determining the ratio (%) of the total volume (V) of blast furnace slag processed sand to the total volume (V ′) of the container.
【００１４】本発明のドライ型プレミックスモルタル組
成物におけるセメント成分と高炉スラグ加工砂との混合
割合は、従来の天然砂を細骨材として用いた場合と全く
同じであり、特に変える必要はない。すなわち、セメン
ト成分に対し、高炉スラグ加工砂を質量比で０．１ない
し１０、好ましくは１ないし５の範囲内で選ばれる。ま
た、本発明のドライ型プレミックスモルタル組成物に
は、所望に応じ、従来のドライ型プレミックスモルタル
組成物に慣用されている添加成分、例えばエチレン−酢
酸ビニルポリ酢酸ビニル加水分解物、メチルセルロー
ス、カルボキシメチルセルロースなどの高分子物質、生
石灰、雲母、シラス、蛇紋岩、明ばん石、カオリンクレ
ー、セピオライト、ドロマイト、石灰石、ウォラストナ
イトなどの無機物質、パルプ、合成繊維のような繊維補
強材、顔料を含有させることができる。The mixing ratio of the cement component and the blast-furnace slag-processed sand in the dry type premix mortar composition of the present invention is exactly the same as when conventional natural sand is used as fine aggregate, and does not need to be particularly changed. . That is, the blast furnace slag processed sand is selected in a mass ratio of 0.1 to 10, preferably 1 to 5, with respect to the cement component. Further, the dry type premix mortar composition of the present invention, if desired, additional components conventionally used in conventional dry type premix mortar compositions, for example, ethylene-vinyl acetate polyvinyl acetate hydrolyzate, methylcellulose, carboxy. Polymeric substances such as methylcellulose, quicklime, mica, shirasu, serpentine, albite, kaolin clay, sepiolite, dolomite, limestone, inorganic substances such as wollastonite, fiber, fiber reinforcement such as synthetic fiber, pigment Can be included.
【００１５】本発明のドライ型プレミックスモルタル組
成物は、従来の天然砂を細骨材として用いたものと全く
同様に水を加え、水２５〜７０質量％を含むモルタルと
して各種用途に供することができる。The dry type premix mortar composition of the present invention is added to water in the same manner as in the case of using conventional natural sand as fine aggregate, and is used for various purposes as a mortar containing 25 to 70% by mass of water. You can
【００１６】[0016]
【実施例】次に実施例により本発明をさらに詳細に説明
する。EXAMPLES The present invention will be described in more detail with reference to examples.
【００１７】参考例１
見掛け比重２．２６、粒径範囲０．０１〜２．５ｍｍの
炉前水砕スラグ（Ａ）及び見掛け比重２．５１、粒径範
囲０．０１〜２．５ｍｍの炉前水砕スラグ（Ｂ）の各２
０ｋｇを、円筒状の回転式摺動摩砕機（直径６００ｍ
ｍ、高さ２００ｍｍ、回転速度２０００ｒｐｍ）に装入
し、滞留時間５分間で連続的に自生摩砕処理した。この
ようにして得た高炉スラグ加工砂の見掛け比重、実積
率、心円率を表１に示す。Reference Example 1 Pre-furnace granulated slag (A) having an apparent specific gravity of 2.26 and a particle size range of 0.01 to 2.5 mm and a furnace having an apparent specific gravity of 2.51 and a particle size range of 0.01 to 2.5 mm 2 for each of previous granulated slag (B)
0kg to a cylindrical rotary sliding mill (diameter 600m
m, height 200 mm, rotation speed 2000 rpm), and continuously self-milling with a residence time of 5 minutes. Table 1 shows the apparent specific gravity, actual volume ratio, and concentricity of the blast furnace slag processed sand thus obtained.
【００１８】[0018]
【表１】 [Table 1]
【００１９】この表から明らかなように、高炉スラグの
見掛け比重、実積率、心円率はいずれも自生摩砕処理に
より向上し、天然砂の物性に近付いている。As is clear from this table, the apparent specific gravity, actual volume ratio, and eccentricity of the blast furnace slag are all improved by self-milling treatment, and are close to the physical properties of natural sand.
【００２０】参考例２
見掛け比重２．７６、粒径範囲０．３〜５ｍｍ、実積率
５６．６％、心円率７６．１％の高炉水砕スラグを、乾
燥状態及び水含有率３質量％のダブルロールクラッシャ
ーにより破砕したのち、参考例１と同じ円筒状の回転式
摺動摩砕機を用いて、自生摩砕処理した。このようにし
て得た高炉スラグ加工砂の見掛け比重、実積率及び心円
率を、処理前の高炉スラグのそれらとともに表２に示
す。Reference Example 2 Blast-furnace granulated slag having an apparent specific gravity of 2.76, a particle size range of 0.3 to 5 mm, an actual volume ratio of 56.6%, and a eccentricity of 76.1% was dried and the water content was 3 After crushing with a mass% double roll crusher, it was self-milled using the same cylindrical rotary sliding mill as in Reference Example 1. Table 2 shows the apparent specific gravity, actual volume ratio, and circularity of the blast furnace slag processed sand thus obtained, together with those of the blast furnace slag before treatment.
【００２１】[0021]
【表２】 [Table 2]
【００２２】この表から分るように、自生摩砕処理によ
り乾燥状態、湿潤状態のいずれにおいても、実積率は６
０％を超え、湿潤状態の場合は、さらに６５％以上に向
上している。As can be seen from this table, the actual volume ratio is 6 in both the dry state and the wet state due to the self-milling treatment.
It exceeds 0%, and in the wet state, it is further improved to 65% or more.
【００２３】参考例３
見掛け比重２．７１、粒径範囲０．０１〜２．５ｍｍ、
実積率５８．７％、心円率（平均）７３．９の高炉徐冷
スラグを、参考例１と同じ円筒状の回転式摺動摩砕機を
用いて、自生摩砕処理した。このようにして見掛け比重
２．８０、粒径範囲０．１５〜２．５ｍｍ、実積率６
６．５％、心円率（平均）９３．４％の高炉スラグ加工
砂を得た。Reference Example 3 Apparent specific gravity 2.71, particle size range 0.01 to 2.5 mm,
The slowly cooled blast furnace slag with a real volume ratio of 58.7% and a eccentricity (average) of 73.9 was self-milled using the same cylindrical rotary sliding mill as in Reference Example 1. In this way, the apparent specific gravity is 2.80, the particle size range is 0.15 to 2.5 mm, and the actual volume ratio is 6.
Blast-furnace slag processed sand with 6.5% and circularity (average) of 93.4% was obtained.
【００２４】実施例１
参考例１で得た炉前水砕スラグ（Ａ）の摩砕処理物を普
通ポルトランドセメント（三井鉱山セメント社製）にセ
メント１：加工スラグ２の質量比で配合して、ドライ型
プレミックスモルタル組成を調製した。次いで、これに
セメントの質量の１／２に相当する水を加えて混練り
し、供試体（４０×４０×１６０ｍｍ）を作成した。こ
のようにして得た供試体について、ＪＩＳ Ｒ５２０１
従って曲げ試験を行った。その結果を図１にＡとして示
す。なお、図１には、比較のために細骨粒として標準砂
（ＪＩＳ Ｒ５２０１）を用いた場合の結果をＢとして
示した。また、この供試体について、２８日後の長さ変
化率を求めたところ、−０．０９％で標準砂の場合の−
０．０７％に比べ、若干大きかった。Example 1 The ground product of the granulated slag (A) before furnace obtained in Reference Example 1 was mixed with ordinary Portland cement (manufactured by Mitsui Mining Cement Co., Ltd.) in a mass ratio of cement 1: processed slag 2. A dry type premix mortar composition was prepared. Next, water corresponding to ½ of the mass of cement was added and kneaded to prepare a test piece (40 × 40 × 160 mm). Regarding the specimen thus obtained, JIS R5201
Therefore, a bending test was performed. The result is shown as A in FIG. In FIG. 1, the result when standard sand (JIS R5201) is used as fine bone particles is shown as B for comparison. In addition, when the rate of change in length after 28 days was calculated for this test piece, it was -0.09%, which was
It was slightly larger than 0.07%.
【００２５】比較例１
参考例１で用いた炉前水砕スラグの未処理物を、摩砕処
理物の代りに用いてドライ型プレミックスモルタル組成
物を調製し、実施例１と同様の試験を行った。その結果
を図１にＣとして示す。この図から分るように、自生摩
砕処理した見掛け比重２．２０以上、粒径２．５ｍｍ以
下、心円率７０％以上、実積率５５％以上の高炉スラグ
加工砂を細骨粒として用いると、天然砂を用いた場合に
匹敵若しくはそれ以上の品質のドライ型プレミックスモ
ルタル組成物を得ることができる。Comparative Example 1 A dry premixed mortar composition was prepared by using the untreated pre-furnace granulated slag used in Reference Example 1 instead of the milled product, and the same test as in Example 1 was conducted. I went. The result is shown as C in FIG. As can be seen from this figure, blast-furnace slag processed sand with apparent specific gravity of 2.20 or more, particle diameter of 2.5 mm or less, eccentricity of 70% or more, and actual volume of 55% or more is treated as fine bone particles. When used, it is possible to obtain a dry premix mortar composition having a quality equal to or higher than that when natural sand is used.
【００２６】実施例２〜９
参考例３で得た高炉スラグ加工砂と普通ポルトランドセ
メント（三井鉱山セメント社製）と無水セッコウとを、
表３に示す量（ｇ）で混合し、ドライ型プレミックスモ
ルタル組成物各２０００ｇを調製した。Examples 2 to 9 Blast furnace slag processed sand obtained in Reference Example 3, ordinary Portland cement (manufactured by Mitsui Mining Cement Co., Ltd.) and anhydrous gypsum were used.
The amounts (g) shown in Table 3 were mixed to prepare 2000 g of each dry type premix mortar composition.
【００２７】[0027]
【表３】 [Table 3]
【００２８】次に、これらの組成物に水２９５〜３５０
ｇを加えて、フロー値約１９０に統一したモルタルペー
ストを調製した。これらのモルタルペーストを用い、Ｊ
ＩＳＲ５２０１に従い、断面４０ｍｍ平方、長さ１６０
ｍｍの供試体を作成し、２８日間養生した。このように
して得た供試体の長さ変化率、曲げ強さ及び圧縮強さの
経時的測定値を表４に示す。なお、この表から分るよう
に、高炉スラグ砂の割合が、セメント成分よりも多い場
合には、セッコウをセメント成分に５質量％以上配合し
て機械的強度を補強することが必要である。Next, these compositions were mixed with water 295-350.
g was added to prepare a mortar paste having a flow value of about 190. Using these mortar paste, J
Section 40 mm square, length 160 according to ISR5201
mm specimens were prepared and cured for 28 days. Table 4 shows the time-dependent measurement values of the rate of change in length, bending strength, and compressive strength of the specimen thus obtained. As can be seen from this table, when the proportion of blast furnace slag sand is higher than the cement component, it is necessary to mix gypsum with the cement component in an amount of 5% by mass or more to reinforce the mechanical strength.
【００２９】比較例２
参考例３で得た高炉スラグ加工砂の代りに、参考例３で
原料として用いた未処理の高炉徐冷スラグ砂を用い、実
施例１と同様にしてドライ型プレミックスモルタル組成
物２０００ｇを調製し、実施例１と同様にして試験片を
作成し、２８日間養生した。このようにして得た供試体
の長さ変化率、曲げ強さ、圧縮強さの経時的測定値を表
４に示す。このものは、天然砂を用いた場合に匹敵する
物性を有するが、作業性が著しく悪かった。Comparative Example 2 In place of the blast furnace slag processed sand obtained in Reference Example 3, untreated blast furnace slowly cooled slag sand used as a raw material in Reference Example 3 was used, and dry type premix was carried out in the same manner as in Example 1. 2000 g of a mortar composition was prepared, a test piece was prepared in the same manner as in Example 1, and aged for 28 days. Table 4 shows the time-dependent measurement values of the rate of change in length, bending strength, and compressive strength of the test piece thus obtained. This product has physical properties comparable to those of natural sand, but its workability was extremely poor.
【００３０】[0030]
【表４】 [Table 4]
【００３１】[0031]
【発明の効果】本発明によれば、天然砂の代りに高炉ス
ラグ加工砂を用い、天然砂を用いた場合に匹敵する品質
をもち、作業性の良好なドライ型プレミックスモルタル
組成物が得られる。INDUSTRIAL APPLICABILITY According to the present invention, a dry premix mortar composition having qualities comparable to the case of using natural sand and good workability is obtained by using blast furnace slag processed sand instead of natural sand. To be
【図１】 実施例１及び比較例１における供試体の曲げ
強さの経時変化を示すグラフ。FIG. 1 is a graph showing changes with time in bending strength of specimens in Example 1 and Comparative Example 1.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 下川 裕士 福岡県飯塚市本町15−３ (72)発明者 城塚 秀敏 福岡県嘉穂郡穂波町大字秋松943 ア・ ラ・モードＡ201 (72)発明者 木村 邦夫 佐賀県鳥栖市宿町字野々下807番地１ 独 立行政法人産業技術総合研究所九州センタ ー内 Ｆターム(参考） 4G012 MB23 PA29 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Hiroshi Shimokawa 15-3 Honmachi, Iizuka City, Fukuoka Prefecture (72) Inventor Hidetoshi Jozuka 943 Akimatsu, Honami-cho, Kaho-gun, Fukuoka Prefecture La Mode A201 (72) Inventor Kunio Kimura 807 Nonoshita, Yadomachi, Tosu City, Saga, Germany National Institute of Advanced Industrial Science and Technology Kyushu Center -In F-term (reference) 4G012 MB23 PA29
Claims (4)
ックスモルタル組成物において、細骨材として、見掛け
比重２．２０以上で粒径２．５ｍｍ以下の高炉スラグ粗
砕物を自生摩砕処理して得られる、心円率７０％以上、
実積率５５％以上の高炉スラグ加工砂を用いることを特
徴とするドライ型プレミックスモルタル組成物。1. A premixed mortar composition comprising a cement component and fine aggregate, which is obtained by subjecting a blast furnace slag coarse crushed product having an apparent specific gravity of 2.20 or more and a particle size of 2.5 mm or less to finely crushed as a fine aggregate. 70% or more of the circularity obtained,
A dry type premix mortar composition characterized by using blast-furnace slag processed sand having a real volume ratio of 55% or more.
及び高炉徐冷スラグ砂の中から選ばれた少なくとも１種
の加工砂である請求項１記載のドライ型プレミックスモ
ルタル組成物。2. The dry premix mortar composition according to claim 1, wherein the blast furnace slag processed sand is at least one kind of processed sand selected from blast furnace granulated slag sand and blast furnace slowly cooled slag sand.
の混合割合が質量比で０．１ないし１０の範囲にある請
求項１又は２記載のドライ型プレミックスモルタル組成
物。3. The dry premix mortar composition according to claim 1 or 2, wherein the mixing ratio of the blast furnace slag processed sand to the cement component is in the range of 0.1 to 10 in mass ratio.
０質量％を含む請求項１、２又は３記載のドライ型プレ
ミックスモルタル組成物。4. Gypsum 0.1 to 1 with respect to the cement component
The dry premix mortar composition according to claim 1, 2 or 3, containing 0% by mass.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012116703A (en) * | 2010-11-30 | 2012-06-21 | Taiheiyo Materials Corp | Cement composition |
| KR101202025B1 (en) * | 2012-06-14 | 2012-11-16 | 화인미셀공업(주) | Mortar composition by using blast furnance air cooled slag |
| KR20160113882A (en) * | 2015-03-23 | 2016-10-04 | 신명탑건설(주) | Dry mortar composition comprising blast furnace slag |
-
2002
- 2002-03-28 JP JP2002093009A patent/JP3774418B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012116703A (en) * | 2010-11-30 | 2012-06-21 | Taiheiyo Materials Corp | Cement composition |
| KR101202025B1 (en) * | 2012-06-14 | 2012-11-16 | 화인미셀공업(주) | Mortar composition by using blast furnance air cooled slag |
| KR20160113882A (en) * | 2015-03-23 | 2016-10-04 | 신명탑건설(주) | Dry mortar composition comprising blast furnace slag |
| KR101720212B1 (en) * | 2015-03-23 | 2017-03-27 | 신명탑건설(주) | Dry mortar composition comprising blast furnace slag |
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