JP5024669B2 - Cement grinding aid - Google Patents
Cement grinding aid Download PDFInfo
- Publication number
- JP5024669B2 JP5024669B2 JP2007250353A JP2007250353A JP5024669B2 JP 5024669 B2 JP5024669 B2 JP 5024669B2 JP 2007250353 A JP2007250353 A JP 2007250353A JP 2007250353 A JP2007250353 A JP 2007250353A JP 5024669 B2 JP5024669 B2 JP 5024669B2
- Authority
- JP
- Japan
- Prior art keywords
- cement
- diethylene glycol
- grinding aid
- strength
- ethylene glycol
- 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.)
- Active
Links
Images
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
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/48—Clinker treatment
- C04B7/52—Grinding ; After-treatment of ground cement
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/52—Grinding aids; Additives added during grinding
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Disintegrating Or Milling (AREA)
Description
本発明は、セメントの粉砕助剤に関する。
The present invention relates to a grinding aid for cement.
セメント工場において、セメント原料、セメントクリンカー、又はセメント製品等を粉砕する際には、その粉砕効率の向上を目的として粉砕助剤が添加されている。
該粉砕助剤としては、比較的安価で且つ粉砕効率に優れるという点、更には、該粉砕助剤が添加されたセメントの強度発現性が良好である等の観点から、従来、ジエチレングリコールの採用が検討されている（比特許文献１）。
In a cement factory, when a cement raw material, a cement clinker, a cement product, or the like is pulverized, a pulverization aid is added for the purpose of improving the pulverization efficiency.
Conventionally, diethylene glycol has been adopted as the grinding aid from the viewpoints of being relatively inexpensive and excellent in grinding efficiency, and from the viewpoint of good strength development of the cement to which the grinding aid is added. It has been studied (Comparative Patent Document 1).
しかしながら、ジエチレングリコールはエチレングリコールの製造に際して副生成物として得られていたことから、従来、比較的安価に入手することが可能であったが、該エチレングリコールの製造技術の進歩により副生成物の生成量が減少し、近年、入手が困難な状況となり、価格も上昇する傾向にある。 However, since diethylene glycol was obtained as a by-product in the production of ethylene glycol, it was conventionally possible to obtain it relatively inexpensively. In recent years, the amount has decreased, and it has become difficult to obtain, and the price has also increased.
また、本発明者らが鋭意研究した結果、該ジエチレングリコールが残存したセメントは残存しないセメントと比較して、初期強度の増進効果はあるものの、長期強度が低下する場合があることが見出された。 Further, as a result of intensive studies by the present inventors, it has been found that the cement in which the diethylene glycol remains has an effect of increasing the initial strength but may decrease the long-term strength, compared with a cement that does not remain. .
そこで、本発明は、ジエチレングリコールを用いた場合のセメント粉砕効率、及び得られたセメントの初期強度増進効果を維持しつつ、さらに、得られたセメントの長期強度の低下を防止しうるようなセメント粉砕助剤を提供することを一の課題とする。
Accordingly, the present invention provides a cement grinding that can prevent the deterioration of the long-term strength of the obtained cement while maintaining the cement grinding efficiency when diethylene glycol is used and the effect of increasing the initial strength of the obtained cement. One object is to provide an auxiliary agent.
本発明者らが鋭意研究したところ、ジエチレングリコールに所定割合のエチレングリコールを混合することにより、ジエチレングリコールによる破砕効率や初期強度増進効果を維持しつつ、しかも長期強度の低下を防止しうること見出し、本発明を完成するに至った。即ち、本発明は、エチレングリコールとジエチレングリコールとが、３０：７０〜７０：３０の質量比で配合されてなり、前記エチレングリコール及び前記ジエチレングリコールの合計含有量が、９０質量％以上であることを特徴とするセメント粉砕助剤を提供する。
As a result of diligent research by the present inventors, it has been found that by mixing a predetermined proportion of ethylene glycol with diethylene glycol, it is possible to maintain the crushing efficiency and initial strength enhancement effect of diethylene glycol, and to prevent a decrease in long-term strength. The invention has been completed. That is, the present invention, ethylene glycol and diethylene glycol is 30: 70 to 70: formulated with 30 weight ratio of Ri Na, the total content of the ethylene glycol and the diethylene glycol, the 90 mass% or more A cement grinding aid is provided.
本発明に係るセメント粉砕助剤によれば、ジエチレングリコールの使用量が減少しているにもかかわらず、ジエチレングリコールのみを用いた際のセメントの粉砕効率と同程度の粉砕効率が得られ、且つジエチレングリコールのみを用いて粉砕することによって得られたセメントの初期強度増進効果が維持され、しかも、長期強度低減を防止することが可能となる。
また、エチレングリコールは、ジエチレングリコールよりも流通量が多く且つ安価であるため、ジエチレングリコール単体を用いた場合と比較して、セメントの製造コストを低減しうるという効果がある。
According to a cement grinding aids of the present invention, despite the use of diethylene glycol is reduced, diethylene only cement grinding efficiency comparable grinding efficiency of the time of using the resulting, and diethylene only The effect of increasing the initial strength of the cement obtained by pulverizing with the use of is maintained, and it is possible to prevent a long-term strength reduction.
In addition, since ethylene glycol has a larger circulation amount and is less expensive than diethylene glycol, there is an effect that the manufacturing cost of cement can be reduced as compared with the case where diethylene glycol is used alone.
本発明に係るセメント粉砕助剤は、エチレングリコールとジエチレングリコールとが、３０：７０〜７０：３０の質量比で配合されたものである。斯かる範囲よりもエチレングリコールが多くなると、セメントの粉砕効率や初期強度増進効果が低下してしまい、逆に、斯かる範囲よりもエチレングリコールが少なくなると、セメントの長期強度が低下してしまう。
エチレングリコールとジエチレングリコールの質量比は、好ましくは４０：６０〜６０：４０であり、特に好ましくは４５：５５〜５５：４５である。
The cement grinding aid according to the present invention is a blend of ethylene glycol and diethylene glycol in a mass ratio of 30:70 to 70:30. If the amount of ethylene glycol is larger than this range, the cement grinding efficiency and the effect of increasing the initial strength are lowered. Conversely, if the amount of ethylene glycol is smaller than this range, the long-term strength of the cement is lowered.
The mass ratio of ethylene glycol to diethylene glycol is preferably 40:60 to 60:40, and particularly preferably 45:55 to 55:45.
また、本発明に係るセメント粉砕助剤は、エチレングリコール及びジエチレングリコールの合計含有量が、９０質量％以上となるように構成される。エチレングリコール及びジエチレングリコールの合計含有量が、９０質量％以上であるため、粉砕効率の改善効果がより一層顕著になるという効果がある。
Further, a cement grinding aids of the present invention, the total content of e Chi glycol and diethylene glycol is configured to be 90 mass% or more. The total content of ethylene glycol and diethylene glycol, since it is 90 mass% or more, there is an effect that improvement of flour砕効rate becomes much more remarkable.
本発明に係るセメント粉砕助剤の添加量は、従来のセメント粉砕助剤と同様であり、例えばセメントクリンカーを粉砕する場合、該セメントクリンカー１００質量部に対して０．０１〜０．０６質量部の範囲とすることができる。 The addition amount of the cement grinding aid according to the present invention is the same as that of the conventional cement grinding aid. Range.
また、セメントの粉砕方法の一形態としては、エチレングリコールとジエチレングリコールとを、３０：７０〜７０：３０の質量比で添加した状態でセメントの粉砕を行うものである。
これらエチレングリコール及びジエチレングリコールの添加は、セメントの粉砕時又は粉砕前に行うことができ、両者を同時に添加してもよく、あるいは別々に添加してもよい。
Moreover , as one form of the cement grinding method , cement grinding is performed in a state where ethylene glycol and diethylene glycol are added at a mass ratio of 30:70 to 70:30.
These ethylene glycol and diethylene glycol can be added at the time of pulverization of the cement or before pulverization, and both may be added simultaneously or separately.
セメントの粉砕手段については特に限定されず、従来公知の手段を採用することができる。 The cement grinding means is not particularly limited, and conventionally known means can be employed.
（セメントの粉砕試験）
普通ポルトランドセメントクリンカー７ｋｇと、二水石膏２５０ｇと、下記表１に示した配合の粉砕助剤２．１ｇ（セメントクリンカー１００質量部に対して０．０３質量部）とをボールミルに入れて粉砕し、粉砕時間と粉末度（ブレーン比表面積）との関係を求めた。結果を表１及び図１に示す。
(Cement grinding test)
7 kg of ordinary Portland cement clinker, 250 g of dihydrate gypsum, and 2.1 g of a grinding aid blended as shown in Table 1 below (0.03 parts by mass with respect to 100 parts by mass of cement clinker) were pulverized in a ball mill. The relationship between pulverization time and fineness (Blaine specific surface area) was determined. The results are shown in Table 1 and FIG.
表１及び図１によれば、エチレングリコールとジエチレングリコールとを混合して添加した実施例１の場合には、添加しない比較例１と比べて粉砕効率が向上しているだけでなく、それぞれを単独で添加した比較例２及び３と比較しても、僅かながら粉砕効率が向上していることが認められる。 According to Table 1 and FIG. 1, in the case of Example 1 in which ethylene glycol and diethylene glycol were mixed and added, not only the pulverization efficiency was improved as compared with Comparative Example 1 in which ethylene glycol and diethylene glycol were added, but each of them was used alone. Even when compared with Comparative Examples 2 and 3 added in Step 3, it is recognized that the grinding efficiency is slightly improved.
（強度発現試験）
次に、下記表２に示した粉砕助剤を普通ポルトランドセメントに添加し、ＪＩＳ Ｒ ５２０１「セメントの物理試験方法」に規定された試験方法に基づき、水量２７．８％で調製したセメントペーストについて、始発時間および終結時間、並びに材齢３日、７日及び２８日における圧縮強さを測定した。結果を下記表２に示す。
(Strength expression test)
Next, a cement paste prepared by adding the grinding aid shown in Table 2 below to ordinary Portland cement and preparing a water amount of 27.8% based on the test method specified in JIS R 5201 “Physical Test Method for Cement”. The initial and final times, and the compressive strength at the age of 3 days, 7 days and 28 days were measured. The results are shown in Table 2 below.
表２によれば、ジエチレングリコールのみを粉砕助剤として使用した比較例２では、粉砕助剤を添加しない比較例１と比較して、初期強度（３日強度）の増進が図られるが、長期強度（２８日強度）が低下していることが認められる。また、エチレングリコールのみを粉砕助剤として使用した比較例３では、長期強度（２８日強度）の増進が図られるが、初期強度（３日強度）の増進効果が小さいことが認められる。
これに対し、エチレングリコールとジエチレングリコールとの混合物を粉砕助剤として使用した実施例１〜３では、粉砕助剤を添加しない比較例１と比較して初期強度（３日強度）の増進が図られるとともに、併せて長期強度（２８日強度）の増進効果も発揮されていることが認められる。
According to Table 2, in Comparative Example 2 in which only diethylene glycol was used as a grinding aid, the initial strength (three-day strength) was increased as compared with Comparative Example 1 in which no grinding aid was added. It can be seen that the (28 day strength) is reduced. Further, in Comparative Example 3 in which only ethylene glycol is used as a grinding aid, the long-term strength (28-day strength) is improved, but it is recognized that the effect of increasing the initial strength (3-day strength) is small.
On the other hand, in Examples 1 to 3 where a mixture of ethylene glycol and diethylene glycol was used as a grinding aid, the initial strength (three-day strength) was increased as compared with Comparative Example 1 in which no grinding aid was added. At the same time, it is recognized that a long-term strength (28-day strength) enhancement effect is also exhibited.
また、何れの実施例でも、凝結時間については比較例１とほぼ同様であり、凝結に悪影響を及ぼすことなく、上述のような強度増進効果を発揮しうることが認められる。 In any of the examples, the setting time is almost the same as that of Comparative Example 1, and it is recognized that the above-described strength enhancement effect can be exhibited without adversely affecting the setting.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007250353A JP5024669B2 (en) | 2007-09-27 | 2007-09-27 | Cement grinding aid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007250353A JP5024669B2 (en) | 2007-09-27 | 2007-09-27 | Cement grinding aid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2009078953A JP2009078953A (en) | 2009-04-16 |
| JP5024669B2 true JP5024669B2 (en) | 2012-09-12 |
Family
ID=40654004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2007250353A Active JP5024669B2 (en) | 2007-09-27 | 2007-09-27 | Cement grinding aid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP5024669B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103253876B (en) * | 2013-04-25 | 2016-02-10 | 南京工业大学 | Activated grinding aid for steel slag micropowder and preparation method thereof |
| CN112851177B (en) * | 2021-03-27 | 2022-04-26 | 唐山冀东水泥外加剂有限责任公司 | Cement grinding aid and cement using same |
| CN113358524B (en) * | 2021-05-28 | 2023-02-07 | 北京工业大学 | Method for evaluating grinding assisting effect of cement raw material grinding aid |
| CN115893907B (en) * | 2022-12-31 | 2024-08-06 | 卫辉市春江水泥有限公司 | Composite cement grinding aid and preparation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2622920B2 (en) * | 1992-09-02 | 1997-06-25 | 日本セメント株式会社 | Method for suppressing dust generation of cement or lime |
| JP4661121B2 (en) * | 2003-08-08 | 2011-03-30 | 宇部興産株式会社 | Cement manufacturing method |
| JP2005060203A (en) * | 2003-08-20 | 2005-03-10 | Denki Kagaku Kogyo Kk | Alumina cement composition and monolithic refractory using the same |
-
2007
- 2007-09-27 JP JP2007250353A patent/JP5024669B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2009078953A (en) | 2009-04-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1558542B1 (en) | A method for grinding cement comprising amine-containing cement processing additives | |
| MX2008013906A (en) | Low cement concrete. | |
| JP2017210398A (en) | Cement grinding aid and method for producing cement composition using the same | |
| EP2700622A1 (en) | Cement clinker, method for manufacturing same and cement composition | |
| JP7341366B2 (en) | Cement composition and its manufacturing method | |
| JP2016088768A (en) | Cement composition and manufacturing method therefor | |
| JP5024669B2 (en) | Cement grinding aid | |
| JP2016088767A (en) | Cement composition and manufacturing method therefor | |
| KR20130087240A (en) | Activator for high volume slag cement, high volume slag cement composition containing the activator and process of the cement | |
| JP2016005997A (en) | Cement composition and manufacturing method thereof | |
| CN110668716A (en) | Composite cement and preparation method thereof | |
| KR101856380B1 (en) | Concrete Composition Using Utilizing Liquid Activator | |
| JP7369849B2 (en) | cement composition | |
| JP2014196220A (en) | Coal ash-mixed cement, and preparation method thereof | |
| JP5759801B2 (en) | Method for producing hydraulic powder | |
| JP6022340B2 (en) | Method for producing hydraulic powder | |
| JP2019014640A (en) | Cement additive material and cement composition | |
| TWI438168B (en) | A compound mineral admixture with multiple functions applied to the concrete cement material | |
| KR20150022189A (en) | Concrete binder and Process thereof | |
| JP6885835B2 (en) | Cement additive and cement composition | |
| JP2019011214A (en) | Cement additive and cement composition | |
| CN110922072A (en) | Cement preparation method | |
| JP2012126620A (en) | Method for producing hydraulic powder | |
| JP5932472B2 (en) | Method for producing curable composition | |
| JP6278478B2 (en) | Cement composition and concrete |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20100129 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20110727 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20110805 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20110928 |
|
| 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: 20120525 |
|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20120607 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20150629 Year of fee payment: 3 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 5024669 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 Free format text: JAPANESE INTERMEDIATE CODE: R150 |