JPH0826794A - Production of cement - Google Patents
Production of cementInfo
- Publication number
- JPH0826794A JPH0826794A JP6182944A JP18294494A JPH0826794A JP H0826794 A JPH0826794 A JP H0826794A JP 6182944 A JP6182944 A JP 6182944A JP 18294494 A JP18294494 A JP 18294494A JP H0826794 A JPH0826794 A JP H0826794A
- Authority
- JP
- Japan
- Prior art keywords
- cement
- composition
- concrete
- crushed
- mortar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/246—Cements from oil shales, residues or waste other than slag from waste building materials, e.g. waste asbestos-cement products, demolition waste
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
- C04B7/42—Active ingredients added before, or during, the burning process
- C04B7/421—Inorganic materials
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、セメントの製造方法、
特にモルタルやコンクリ−ト廃材から再生セメントを製
造する方法に関する。FIELD OF THE INVENTION The present invention relates to a method for producing cement,
In particular, it relates to a method for producing recycled cement from mortar and concrete waste materials.
【０００２】[0002]
【従来の技術】近年、道路や橋梁、上下水道、住宅等の
社会資本の整備や、ビルや工場等の高層化や大型化に伴
い、その建設土木工事に付随して発生する建設廃材は膨
大な量となっており、今後益々増加することが予想され
ている。特に、建設廃材のうち発生量が多いコンクリ−
ト廃材に関しては、その一部が路盤やアスファルト舗装
等の床材、あるいは山間部や海面の埋め立て用材料とし
て再利用されているものの、大部分はそのまま廃棄され
ているのが現状である。しかし、廃棄処理地の不足や遠
隔化、あるいはその管理等、廃材の処理に関する諸問題
が発生し、環境汚染とも関連して大きな社会問題となっ
ている。2. Description of the Related Art In recent years, with the development of social capital such as roads, bridges, water and sewage systems, housing, etc., as well as the rise and increase in size of buildings and factories, the amount of construction waste that accompanies the construction works has been enormous. However, it is expected that it will increase more and more in the future. In particular, concrete that produces a large amount of construction waste
Regarding waste materials, some of them are reused as floor materials for roadbeds, asphalt pavements, etc., or as landfill materials for mountains and the sea surface, but most of them are currently discarded. However, various problems related to the disposal of waste materials such as shortage of waste disposal sites, remoteization, or management thereof have become a major social problem in connection with environmental pollution.
【０００３】そこで、環境保護や省資源の面から、コン
クリ−ト廃材を有効に再利用する方法が強く望まれてお
り、これまでにも各種の方法が提案されている。例え
ば、特開昭５３−１２６０２８号広報には、コンクリ−
ト廃材を粉砕して角を落とし、水洗乾燥後に樹脂系乳剤
で表面処理したものを、セメントや砂と混合して石材と
して加工する方法が開示されている。Therefore, from the viewpoint of environmental protection and resource saving, there is a strong demand for a method for effectively recycling concrete waste materials, and various methods have been proposed so far. For example, in the publication of JP-A-53-126028, the concrete
A method is disclosed in which waste materials are crushed to remove horns, washed with water and dried, and then surface-treated with a resin emulsion, and mixed with cement or sand to be processed into stone materials.
【０００４】[0004]
【発明が解決しようとする課題】記述したようにコンク
リ−ト廃材は、一部が路盤やアスファルト舗装等の床材
として再利用されているものの、その大部分は山間部や
海面の埋め立て用材料として利用されているだけであ
り、その利用範囲も狭く、付加価値も高いものではな
い。As described above, although some concrete waste materials are reused as floor materials for roadbeds, asphalt pavements, etc., most of them are landfill materials for mountains and sea surfaces. It is only used as a product, its range of use is narrow, and its added value is not high.
【０００５】本発明は、モルタルやコンクリ−ト廃材を
再生セメントに転化してモルタルやコンクリ−ト生成用
原料とすることにより、その利用範囲を広げると同時に
付加価値を高めることを目的とするものである。It is an object of the present invention to expand the range of use and increase added value by converting mortar and concrete waste materials into recycled cement to obtain raw materials for mortar and concrete production. Is.
【０００６】[0006]
【課題を解決するための手段】本発明者らは、モルタル
やコンクリ−ト廃材の再生に関する前記課題を解決すべ
く鋭意研究を重ねた結果、廃材破砕物から新たなセメン
トに転化できることを見いだし、本発明を完成するに至
った。即ち、前記課題は、（１）モルタル・コンクリ−
ト廃材を粉砕し、これをセメント原料の一部として焼成
すること、（２）モルタル・コンクリ−ト廃材を粉砕す
るとともに組成調整し、これをセメント原料として焼成
すること、（３）モルタル・コンクリ−ト廃材を粉砕す
るとともに組成調整し、これをセメント原料として焼成
した焼結体（クリンカ−）を他のセメントと混合使用す
ること、（４）組成調整に当たり、石灰質成分、ケイ酸
質成分、アルミナ質成分、鉄質成分の少なくとも一つ以
上を添加することを特徴とするセメントの製造方法によ
り解決することができる。[Means for Solving the Problems] As a result of intensive studies to solve the above-mentioned problems concerning the regeneration of mortar and concrete waste materials, the present inventors have found that waste material crushed materials can be converted into new cement, The present invention has been completed. That is, the above-mentioned problems are (1) mortar concrete
(2) crushing the waste materials to be crushed and firing it as a part of the cement raw material; (2) crushing the mortar concrete waste material and adjusting the composition, and firing it as the cement raw material; (3) mortar concrete -To crush the waste material and adjust the composition, and mix and use a sintered body (clinker) obtained by firing this as a cement raw material with other cement. (4) In adjusting the composition, a calcareous component, a siliceous component, This can be solved by a method for producing cement, which is characterized by adding at least one of an alumina component and an iron component.
【０００７】以下に、本発明に係るセメントの製造方法
を詳細に説明する。回収モルタルやコンクリ−ト廃材を
公知の粉砕機により破砕する。この粉砕物はセメントの
水和物及び骨材の混合物から構成されるが、骨材は川
砂、山砂、海砂の他、最近は石灰石骨材、人工骨材等種
々雑多な物が使用され、初期のＣａＯ／ＳｉＯ2モル比
が異なる他、モルタルやコンクリ−ト廃材の種類により
バラツキも大きい。The method for producing cement according to the present invention will be described in detail below. The recovered mortar and concrete waste materials are crushed by a known crusher. This pulverized product is composed of a mixture of cement hydrate and aggregate, but recently various other substances such as river sand, mountain sand, sea sand, limestone aggregate and artificial aggregate are used. The initial CaO / SiO 2 molar ratio is different, and the variation is large depending on the type of mortar and concrete waste.
【０００８】そこで、市販のポルトランドセメントに比
べてＣａＯ／ＳｉＯ2モル比が低下している場合が多
く、主として石灰石粉末等の石灰質成分を添加してＣａ
Ｏ／ＳｉＯ2モル比の調整を行う。このＣａＯ／ＳｉＯ2
モル比の最適値は、セメント水和物の組成や廃材の材令
（経時日数）によって異なるが、２．０〜５．０の範
囲、望ましくは２．３〜３．０の範囲、更に望ましくは
２．７〜２．９の範囲に設定されることが望ましい。Ｃ
ａＯ量が多くなると水和熱や硬化体の膨張が大きくな
り、逆にモル比が小さくなるとセメント組成がＣ2Ｓ側
にシフトして石英成分が多く晶析し、いずれの場合もコ
ンクリ−トの機械的強度を低下させる要因となる。Therefore, the CaO / SiO 2 molar ratio is often lower than that of commercially available Portland cement, and Ca is mainly added by adding calcareous components such as limestone powder.
The O / SiO 2 molar ratio is adjusted. This CaO / SiO 2
The optimum value of the molar ratio varies depending on the composition of the cement hydrate and the age of the waste material (the number of days elapsed), but is in the range of 2.0 to 5.0, preferably 2.3 to 3.0, and more preferably Is preferably set in the range of 2.7 to 2.9. C
When the amount of aO increases, the heat of hydration and expansion of the hardened product increase, and conversely, when the molar ratio decreases, the cement composition shifts to the C 2 S side and a large amount of quartz component crystallizes, and in either case, the concrete Cause a decrease in the mechanical strength of.
【０００９】また、モルタルやコンクリ−ト廃材の種類
によっては、ＣａＯ分が多く含有されている場合があ
る。この場合は、石灰石の代わりに粘土やケイ石、ケイ
砂等のケイ酸質成分を添加してＣａＯ／ＳｉＯ2モル比
の調整を行う。更に、粘土やスラグ、フライアッシュ、
銅ガラミやＡｌ（ＯＨ）3やＦｅ（ＯＨ）3等のアルミナ
質成分や鉄質成分等を添加して、Ａｌ2Ｏ3やＦｅ2Ｏ3等
のセメント成分の組成調整を行い、ＣａＯ／（ＳｉＯ2
＋Ａｌ2Ｏ3＋Ｆｅ2Ｏ3）モル比として２．０〜５．０、
望ましくは２．２〜３．０の範囲として、出来るだけ市
販のポルトランドセメントの化学組成に近づけることが
望ましい。このモル比調整済粉砕物を、１０００〜１４
５０℃、好ましくは１３５０〜１４５０℃の高温で１〜
４時間焼成して、再生セメントクリンカ−を生成する。Further, depending on the type of mortar or concrete waste material, a large amount of CaO may be contained. In this case, a CaO / SiO 2 molar ratio is adjusted by adding a siliceous component such as clay, silica stone, and silica sand instead of limestone. Furthermore, clay, slag, fly ash,
The composition of the cement components such as Al 2 O 3 and Fe 2 O 3 is adjusted by adding alumina components such as copper burrs and Al (OH) 3 and Fe (OH) 3 and iron components, and CaO / (SiO 2
+ Al 2 O 3 + Fe 2 O 3 ) molar ratio of 2.0 to 5.0,
Desirably, the range of 2.2 to 3.0 is set as close as possible to the chemical composition of commercially available Portland cement. The pulverized product with the adjusted molar ratio is 1000 to 14
1 at a high temperature of 50 ° C, preferably 1350 to 1450 ° C
Bake for 4 hours to produce a recycled cement clinker.
【００１０】この再生セメントクリンカ−に、凝結調整
剤として重量比で数％程度、例えば１〜５重量％の二水
石膏を添加した後、ボ−ルミル等により粉砕して再生セ
メントを生成する。この時の再生セメントクリンカ−の
粉砕状態は、ブレ−ン比表面積で２７００ｃｍ2／ｇ程
度以上が望ましい。また、モルタルやコンクリ−ト廃材
の粉砕物は、これを組成調整し、あるいは組成調整する
ことなく、既存のセメント製造プラントにおいてセメン
ト原料の一部として１５％程度以下添加、焼成してセメ
ントを製造することも可能である。A few% by weight, for example 1 to 5% by weight, of gypsum dihydrate is added to the recycled cement clinker as a coagulation modifier and then crushed by a ball mill or the like to produce recycled cement. At this time, the crushed state of the recycled cement clinker is preferably about 2700 cm 2 / g or more in terms of the specific surface area of the brain. In addition, crushed mortar and concrete waste materials are either adjusted in composition or, without adjusting the composition, added in an existing cement manufacturing plant at a rate of about 15% or less as a part of cement raw material and fired to produce cement. It is also possible to do so.
【００１１】以上説明したように、本発明によると、モ
ルタルやコンクリ−ト廃材から新たなセメントを再生す
ることができるため、コンクリ−ト廃材の有効利用に加
えて、その付加価値を高めることが出来る。As described above, according to the present invention, since new cement can be regenerated from mortar and concrete waste material, the added value can be increased in addition to the effective use of concrete waste material. I can.
【００１２】[0012]
【実施例】本発明に係るコンクリ−ト廃材の処理方法に
関して、実施例を基により詳細に説明する。但し、本発
明は以下に記載される実施例に限定されずに、種々の変
更が可能である。 〔実施例１〕２０年経過した建築物の改修工事現場から
採取した天然川砂を骨材としたコンクリ−ト廃材を、１
００μｍ以下に粉砕した。この粉砕物をＪＩＳ Ｒ ５
２０２に準拠して化学分析を行った。分析結果を表１−
（１）に示す。表１−（１）から明らかなように骨材成
分よりＣａＯ／ＳｉＯ2モル比は、０．２１２程度にま
で低下しており、Ｘ線解析を行ったところ石英のピ−ク
が大きく認められた。この粉砕物に石灰石粉末及びフラ
イアッシュ粉末を添加して、ＣａＯ／ＳｉＯ2モル比を
２．８に調整した後、１４５０℃で１時間焼成して再生
セメントクリンカ−を得た。得られた再生セメントクリ
ンカ−の化学分析値（ＪＩＳ Ｒ ５２０２に準拠）を
表２に示す。表２には比較のために普通ポルトランドセ
メントの化学分析値を併記するが、同表から本発明によ
る再生セメントクリンカ−は普通ポルトランドセメント
に比し、ＣａＯ及びＳｉＯ2をやや多く含むが、略め同
一の組成である。EXAMPLES The method for treating concrete waste material according to the present invention will be described in detail based on examples. However, the present invention is not limited to the examples described below, and various modifications can be made. [Example 1] A concrete waste material containing natural river sand as an aggregate, which was collected from a building repair work site 20 years old
It was crushed to a size of 00 μm or less. This crushed product is JIS R 5
Chemical analysis was performed according to 202. The analysis results are shown in Table 1-
It shows in (1). As is clear from Table 1- (1), the CaO / SiO 2 molar ratio was reduced to about 0.212 compared with the aggregate component, and when X-ray analysis was performed, a large peak of quartz was recognized. It was Limestone powder and fly ash powder were added to this crushed product to adjust the CaO / SiO 2 molar ratio to 2.8, and then the mixture was fired at 1450 ° C. for 1 hour to obtain a recycled cement clinker. Table 2 shows the chemical analysis values (according to JIS R 5202) of the obtained recycled cement clinker. Table 2 also shows chemical analysis values of ordinary Portland cement for comparison. From the same table, the recycled cement clinker according to the present invention contains CaO and SiO 2 in a relatively large amount as compared with ordinary Portland cement, but is omitted. It has the same composition.
【００１３】再生セメントクリンカ−に二水石膏（脱硫
石膏）を再生セメントクリンカ−に対して３重量％添加
し、これをスチ−ルボ−ルミルを用いてブレ−ン値３５
００ｃｍ3／ｇにまで粉砕して再生セメントを得た。得
られた再生セメントをＪＩＳ Ｒ ５２０１に準拠して
凝結及び強度試験を実施し、普通ポルトランドセメント
との比較検討を行った。Gypsum dihydrate (desulfurized gypsum) was added to the recycled cement clinker in an amount of 3% by weight based on the recycled cement clinker, and this was blown with a steel ball mill to a brain value of 35.
The recycled cement was obtained by crushing to a size of 00 cm 3 / g. The obtained regenerated cement was subjected to a setting and strength test in accordance with JIS R 5201, and a comparative study with ordinary Portland cement was carried out.
【００１４】標準軟度のペ−ストを作成するための水／
セメント混合比は、普通ポルトランドセメントが０．２
７であったのに対し、再生セメントでは０．２８であっ
た。また、凝結時間に関しては普通ポルトランドセメン
トは、始発９０分及び終結１５０分であったのに対し
て、再生セメントは始発８５分及び終結１５０分であっ
た。尚、両者ともに偽凝結は起こらなかった。Water for making a paste of standard softness /
The cement mixing ratio is 0.2 for ordinary Portland cement.
It was 7 while it was 0.28 in the recycled cement. Regarding the setting time, the ordinary Portland cement had a starting time of 90 minutes and a finishing time of 150 minutes, whereas the regenerated cement had a starting time of 85 minutes and a finishing time of 150 minutes. Neither of them caused false condensation.
【００１５】このように、再生セメントは、普通ポルト
ランドセメントと同様の凝結特性を示すことが確認され
た。また、再生セメント及び普通ポルトランドセメント
について、セメント／標準砂重量比０．５及びセメント
／水重量比０．６５の割合で配合してモルタルを作成
し、圧縮強度を測定した。２８日圧縮強度を比較する
と、普通ポルトランドセメントが約３８５ｋｇｆ／ｃｍ
2であるのに対し、再生セメントは約１６０ｋｇｆ／ｃ
ｍ2であり、普通ポルトランドセメントの１／３〜１／
２であった。As described above, it was confirmed that the regenerated cement exhibits the setting property similar to that of the ordinary Portland cement. Reclaimed cement and ordinary Portland cement were mixed at a cement / standard sand weight ratio of 0.5 and a cement / water weight ratio of 0.65 to prepare mortar, and the compressive strength was measured. Comparing the 28-day compressive strength, normal Portland cement is about 385 kgf / cm
2 , whereas recycled cement is about 160 kgf / c
m 2 which is 1/3 to 1/1 of that of ordinary Portland cement
It was 2.
【００１６】そこで、前記コンクリ−ト廃材粉末に、粘
土、ケイ石、銅ガラミ粉末をそれぞれ添加し、ＣａＯ／
（ＳｉＯ2＋Ａｌ2Ｏ3＋Ｆｅ2Ｏ3）モル比が２．４７に
なるように普通ポルトランドセメントのモル比２．４４
に近づけたところ、２８日圧縮強度が約３６０ｋｇｆ／
ｃｍ2にまで増加した。また、再生セメントと普通ポル
トランドセメントとを同量の割合で混合してモルタルを
作成したところ、２８日圧縮強度が約３７５ｋｇｆ／ｃ
ｍ2にまで増加した。 〔実施例２〕普通ポルトランドセメントと豊浦ケイ石標
準砂（３００μｍ以上１％、１０６μｍ以上９５％）
を、セメント／標準砂重量比０．５及びセメント／水重
量比０．６５の割合で配合して作成したセメント−ケイ
石系モルタル（材令１年）を、実施例１と同様に粉砕し
て、化学分析を行った。分析結果を表１−（２）に併記
する。実施例１と同様に、ＣａＯ／ＳｉＯ2モル比は
０．３１４まで低下しているのが確認された。この粉砕
物に、石灰石粉末（関東化学（株）製）と各種フライア
ッシュを添加してＣａＯ／ＳｉＯ2モル比を２．７に調
整した後、１４５０℃で１時間焼成して再生セメントク
リンカ−を得た。得られた再生セメントクリンカ−を、
実施例１と同様の化学分析を行った。分析結果を、表２
に併記する。Therefore, clay, silica stone, and copper lice powder are added to the concrete waste material powder, respectively, and CaO /
The molar ratio of ordinary Portland cement is 2.44 so that the molar ratio of (SiO 2 + Al 2 O 3 + Fe 2 O 3 ) is 2.47.
, The 28-day compressive strength was about 360 kgf /
increased to cm 2 . Moreover, when mortar was prepared by mixing recycled cement and ordinary Portland cement in the same ratio, the 28-day compressive strength was about 375 kgf / c.
up to m 2 . Example 2 Normal Portland cement and Toyoura silica stone standard sand (300 μm or more 1%, 106 μm or more 95%)
Cement-silica mortar (age 1 year) prepared by blending the above in a ratio of cement / standard sand weight ratio 0.5 and cement / water weight ratio 0.65 was crushed in the same manner as in Example 1. Then, a chemical analysis was performed. The analysis results are also shown in Table 1- (2). As in Example 1, it was confirmed that the CaO / SiO 2 molar ratio had dropped to 0.314. Limestone powder (manufactured by Kanto Kagaku Co., Ltd.) and various fly ash were added to this crushed product to adjust the CaO / SiO 2 molar ratio to 2.7, and then the mixture was fired at 1450 ° C. for 1 hour to regenerate cement clinker. Got The regenerated cement clinker obtained was
The same chemical analysis as in Example 1 was performed. The analysis results are shown in Table 2.
Also described in.
【００１７】再生セメントクリンカ−を、実施例１と同
様にして再生セメントを生成し、この再生セメントをも
とにモルタルを作成して同様の強度試験を行った。２８
日圧縮強度は、約２９０ｋｇｆ／ｃｍ2であり、ポルト
ランドセメントの２／３程度の強度を示した。 〔実施例３〕異なる各地の建築物改修工事現場から採取
した材令、使用骨材が雑多に混在するコンクリ−ト廃材
を、実施例１と同様に粉砕して化学分析を行った。分析
結果を、表１−（３）に併記する。この破砕物に石灰石
粉末を添加して、ＣａＯ／ＳｉＯ2モル比を２．７４に
調整した後、１４５０℃で１時間焼成して再生セメント
クリンカ−を得た。得られた再生セメントクリンカ−
を、実施例１と同様に化学分析を行った。分析結果を、
表２に併記する。Regenerated cement clinker was produced in the same manner as in Example 1, and mortar was prepared based on this regenerated cement and the same strength test was conducted. 28
The daily compressive strength was about 290 kgf / cm 2 , which was about 2/3 that of Portland cement. [Example 3] Concrete waste materials, which were mixed in various ages and aggregates used, collected from different sites of building repair work were ground and subjected to chemical analysis in the same manner as in Example 1. The analysis results are also shown in Table 1- (3). Limestone powder was added to this crushed product to adjust the CaO / SiO 2 molar ratio to 2.74, and then the mixture was fired at 1450 ° C. for 1 hour to obtain a recycled cement clinker. Obtained recycled cement clinker
Was subjected to a chemical analysis in the same manner as in Example 1. Analysis results
It is also shown in Table 2.
【００１８】再生セメントクリンカ−を、実施例１と同
様にして再生セメントを生成し、この再生セメントをも
とにモルタルを作成して同様の強度試験を行った。２８
日圧縮強度は、約２７５ｋｇｆ／ｃｍ2であった。そこ
で、実施例１と同様にコンクリ−ト廃材の粉末に、石灰
石粉末に加えて、フライアッシュ、粘土、ケイ石、銅ガ
ラミ粉末をそれぞれ添加してＣａＯ／（ＳｉＯ2＋Ａｌ2
Ｏ3＋Ｆｅ2Ｏ3）モル比の成分調整を行ったところ、４
１１ｋｇｆ／ｃｍ2の圧縮強度を得た。Regenerated cement clinker was produced in the same manner as in Example 1, and mortar was prepared based on this regenerated cement and the same strength test was conducted. 28
The daily compressive strength was about 275 kgf / cm 2 . Then, in the same manner as in Example 1, in addition to limestone powder, fly ash, clay, silica stone, and copper lice powder were added to the powder of concrete waste material, and CaO / (SiO 2 + Al 2
When the components of O 3 + Fe 2 O 3 ) molar ratio were adjusted, 4
A compressive strength of 11 kgf / cm 2 was obtained.
【００１９】[0019]
【表１】 [Table 1]
【００２０】[0020]
【表２】 [Table 2]
【００２１】[0021]
【発明の効果】以上説明したとおり、本発明に係るセメ
ントの製造方法は、種々雑多な骨材成分を含むモルタル
やコンクリ−ト廃材から新たなセメントとして再生する
ものであり、それらの使用範囲が広がり、付加価値も高
いものとなる。また、再生されるセメントの品質も良好
であり、コンクリ−トとした場合に実用的な強度が得ら
れる。As described above, the method for producing cement according to the present invention is to regenerate a new cement from mortar or concrete waste material containing various aggregate components, and the range of use thereof is Spread and high added value. In addition, the quality of the recycled cement is good, and when it is made into a concrete, a practical strength can be obtained.
Claims (4)
これをセメント原料の一部として焼成することを特徴と
するセメントの製造方法。1. A mortar concrete waste material is crushed,
A method for producing cement, which comprises firing this as a part of a cement raw material.
とともに組成調整し、これをセメント原料として焼成す
ることを特徴とするセメントの製造方法。2. A method for producing cement, which comprises crushing a mortar concrete waste material, adjusting the composition thereof, and firing the mortar concrete waste material as a cement raw material.
とともに組成調整し、これをセメント原料として焼成し
た焼結体（クリンカ−）を他のセメントと混合使用する
ことを特徴とするセメントの製造方法。3. A method for producing a cement, characterized in that a mortar concrete waste material is pulverized and its composition is adjusted, and a sintered body (clinker) obtained by firing the mortar concrete waste material as a cement raw material is mixed with another cement. .
質成分、アルミ質成分、鉄質成分の少なくとも一つ以上
を添加することを特徴とする請求項２もしくは請求項３
に記載のセメントの製造方法。4. The composition according to claim 2 or 3, wherein at least one of a calcareous component, a siliceous component, an aluminous component, and a ferrous component is added in adjusting the composition.
The method for producing the cement according to 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6182944A JPH0826794A (en) | 1994-07-12 | 1994-07-12 | Production of cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6182944A JPH0826794A (en) | 1994-07-12 | 1994-07-12 | Production of cement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0826794A true JPH0826794A (en) | 1996-01-30 |
Family
ID=16127102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6182944A Pending JPH0826794A (en) | 1994-07-12 | 1994-07-12 | Production of cement |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0826794A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2741615A1 (en) * | 1995-11-29 | 1997-05-30 | Commissariat Energie Atomique | Hydraulic binder production |
| JP2004315360A (en) * | 2003-03-31 | 2004-11-11 | Mie Prefecture | Method for manufacturing hydraulic material utilizing waste material of ceramic-based building material |
| WO2006059718A1 (en) | 2004-12-03 | 2006-06-08 | Mitsubishi Materials Corporation | Cement clinker and process for producing the same |
| KR100597621B1 (en) * | 2005-03-04 | 2006-07-10 | 한국후라이애쉬시멘트공업(주) | Admixture using waste-concrete powder and mortar comprising the same |
| JP2012006812A (en) * | 2010-06-28 | 2012-01-12 | Tokyo Institute Of Technology | Regenerated cement raw material and regenerated cement composition using the same |
| WO2021164798A1 (en) * | 2020-02-20 | 2021-08-26 | ERC-TECH a.s. | Blended cement |
| CN116023048A (en) * | 2023-03-28 | 2023-04-28 | 湖南创速新材料有限公司 | Cement clinker and method for preparing cement by using same |
-
1994
- 1994-07-12 JP JP6182944A patent/JPH0826794A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2741615A1 (en) * | 1995-11-29 | 1997-05-30 | Commissariat Energie Atomique | Hydraulic binder production |
| JP2004315360A (en) * | 2003-03-31 | 2004-11-11 | Mie Prefecture | Method for manufacturing hydraulic material utilizing waste material of ceramic-based building material |
| JP4565126B2 (en) * | 2003-03-31 | 2010-10-20 | 三重県 | Method for producing hydraulic materials using waste materials from ceramics building materials |
| WO2006059718A1 (en) | 2004-12-03 | 2006-06-08 | Mitsubishi Materials Corporation | Cement clinker and process for producing the same |
| KR100597621B1 (en) * | 2005-03-04 | 2006-07-10 | 한국후라이애쉬시멘트공업(주) | Admixture using waste-concrete powder and mortar comprising the same |
| JP2012006812A (en) * | 2010-06-28 | 2012-01-12 | Tokyo Institute Of Technology | Regenerated cement raw material and regenerated cement composition using the same |
| WO2021164798A1 (en) * | 2020-02-20 | 2021-08-26 | ERC-TECH a.s. | Blended cement |
| CN116023048A (en) * | 2023-03-28 | 2023-04-28 | 湖南创速新材料有限公司 | Cement clinker and method for preparing cement by using same |
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