DE2031109A1 - Quicklime treated with flocculant - based on polyacrylic material gives stronger sand-lime bricks - Google Patents
Quicklime treated with flocculant - based on polyacrylic material gives stronger sand-lime bricksInfo
- Publication number
- DE2031109A1 DE2031109A1 DE19702031109 DE2031109A DE2031109A1 DE 2031109 A1 DE2031109 A1 DE 2031109A1 DE 19702031109 DE19702031109 DE 19702031109 DE 2031109 A DE2031109 A DE 2031109A DE 2031109 A1 DE2031109 A1 DE 2031109A1
- Authority
- DE
- Germany
- Prior art keywords
- quicklime
- lime
- sand
- flocculant
- active
- 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
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 239000000292 calcium oxide Substances 0.000 title claims abstract description 15
- 235000012255 calcium oxide Nutrition 0.000 title claims abstract description 15
- 239000011455 calcium-silicate brick Substances 0.000 title abstract description 8
- 239000000463 material Substances 0.000 title 1
- 239000000654 additive Substances 0.000 claims abstract description 10
- 230000000996 additive effect Effects 0.000 claims abstract description 7
- 239000008394 flocculating agent Substances 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 4
- 238000012986 modification Methods 0.000 claims description 3
- 230000004048 modification Effects 0.000 claims description 3
- 229920002401 polyacrylamide Polymers 0.000 claims description 3
- 229920002125 Sokalan® Polymers 0.000 claims description 2
- 229920000058 polyacrylate Polymers 0.000 claims description 2
- 150000003856 quaternary ammonium compounds Chemical class 0.000 claims description 2
- 239000004480 active ingredient Substances 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 150000008040 ionic compounds Chemical class 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000004571 lime Substances 0.000 abstract description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract description 3
- 235000011941 Tilia x europaea Nutrition 0.000 abstract description 3
- 125000002091 cationic group Chemical group 0.000 abstract description 3
- 125000000129 anionic group Chemical group 0.000 abstract description 2
- 239000004567 concrete Substances 0.000 abstract description 2
- 239000011431 lime mortar Substances 0.000 abstract description 2
- 241000518994 Conta Species 0.000 abstract 1
- 239000000470 constituent Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 230000036571 hydration Effects 0.000 description 3
- 238000006703 hydration reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 235000011116 calcium hydroxide Nutrition 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229920002873 Polyethylenimine Polymers 0.000 description 1
- 229920006318 anionic polymer Polymers 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 235000012241 calcium silicate Nutrition 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 230000035558 fertility Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229920000193 polymethacrylate Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/10—Lime cements or magnesium oxide cements
-
- 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
- C04B2/00—Lime, magnesia or dolomite
- C04B2/02—Lime
- C04B2/04—Slaking
- C04B2/06—Slaking with addition of substances, e.g. hydrophobic agents ; Slaking in the presence of other compounds
-
- 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)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
Description
Zusatzmittel zur Modifizierun von Branntkalk für die Herstellun von Kalksandsteinen und dergleichen Zur Herstellung von Kalksandsteinen wird üblicherweise feingemahlener Branntkalk verwendet, der, bereits mehr oder weniger intensiv mit dem Sand vermischt, durch Zugabe von Wasser gelöscht wird. Der Löschvorgang setzt im Mischer ein und wird während einer Zwischenlagerung in einem Silo oder einem Reaktor zu Ende geführt. Die abgelöschte, erdfeuchte Kalk-Sand-Mischung wird in Pressen zu dem gewünschten Steinformat gepresst. Die Rohlinge gelangen anschliessend in die Härtekessel (Autoklaven), in denen sie in wenigen Stunden unter einem hohen Wasserdampfdruck von 10 bis 15 atü gehärtet werden. Diesem Dampfdruck entsprechen Temperaturen von 180 bis 2000 C.Additive for the modification of quicklime for the production of Sand-lime bricks and the like For the production of sand-lime bricks is usually finely ground quicklime used, which, already more or less intensively with mixed with the sand, is extinguished by adding water. The deletion process continues in the mixer and is stored in a silo or a Reactor completed. The quenched, earth-moist lime-sand mixture is in Pressing pressed into the desired brick format. The blanks then arrive in the hardening kettle (autoclave), in which they are under a high temperature in a few hours Water vapor pressure of 10 to 15 atmospheres can be hardened. Corresponding to this vapor pressure Temperatures from 180 to 2000 C.
Bei den bisher bekannten Verfahren zur Herstellung von Kalksandsteinen ist der Hydratationsvorgang des Branntkalks häufig unvollständig und ungleichmässig. Das Nachlöschen der nicht völlig abgelöschten Anteile führt in den Rohlingen zu GeSUgestörungen, wodurch Verformungen, Risse und Aussprengungen entstehen können. In the previously known processes for the production of sand-lime bricks the hydration process of quicklime is often incomplete and uneven. The subsequent erasure of the not completely erased portions leads to the blanks GeSU disturbances, which can result in deformations, cracks and splintering.
Darüber hinaus ist es vielfach erwünscht, die DruckSestigkeit der Steine vor und nach dem Härten zu verbessern, was oft nur durch Erhöhung des Kalkgehaltes in der Kalksandsteinrohmasse möglich ist. In addition, it is often desirable to improve the pressure resistance of the To improve stones before and after hardening, what often just through An increase in the lime content in the raw sand-lime block is possible.
Es wurde nun gefunden, dass die Rohlingsstandfestigkeit und die Festigkeit der Kalksandsteine nach dem Härten bedeutend verbessert werden kann, wenn in der Kßlk-Sand-Masse ein Branntkalk Verwendung findet der mit einer wässrigen Lösung von Triäthanolamin oder Äthylenglykol und hochmolehularen, wasserlöslichen, chemischen Verbindungen, die als sogenannte Flockungsmittel bekannt sind, vermahlen wird. It has now been found that the blank stability and strength the sand-lime bricks can be significantly improved after hardening if in the Kßlk-Sand-Masse a quicklime is used with an aqueous solution of triethanolamine or ethylene glycol and high-molecular, water-soluble, chemical Compounds known as so-called flocculants is ground.
Es gibt eine grosse Anzahl solcher wasserlöslicher polymerer Flockungsmittel, deren Molekül linear, verzweigt oder vernetzt sein kann, und die anionischen, kationischen oder nicht ionogenen Charakter haben.There are a large number of such water-soluble polymeric flocculants, whose molecule can be linear, branched or crosslinked, and the anionic, cationic or non-ionic in character.
Demgemäss ist Gegenstand der Erfindung ein Zusatzmittel zur Modifizierung von Branntkalk, das dadurch gekennzeichnet ist dass es als wirksame Bestandteile wasserlösliches hochpn1ere, anionaktive, kationaktive und/oder nichtionogene Flockungsmittel enthält. Als anionische Polymere kommen in erster Linie Polyacrylate und Polymethacrylate in Betracht, während als nichtionogene Verbindungen Polyacrylamide eingesetzt werden können. Yon den kationaktiven Flockungsmitteln eignen sich insbesondere Polyacrylsäuren, die mit quaternären Ammoniumverbindungen verestert sind, in hervorragender Weise für diese Zwecke. Accordingly, the subject matter of the invention is an additive for modification of quicklime, which is characterized by the fact that it is an effective ingredient water-soluble highly powdery, anion-active, cation-active and / or non-ionic flocculants contains. The anionic polymers are primarily polyacrylates and polymethacrylates into consideration, while polyacrylamides are used as nonionic compounds can. Of the cationic flocculants, polyacrylic acids are particularly suitable, which are esterified with quaternary ammonium compounds in an excellent way for these purposes.
Erfindungsgemäss kann das Zusatzmittel wie folgt zusammangesetzt sein: 30 % Triäthanolamin, 10 % eines teilweise verseiften Polyacrylamids oder eines hochmolekularen PolyEthylenimins, 60 % Wasser. According to the invention, the additive can be composed as follows be: 30% triethanolamine, 10% of a partially saponified polyacrylamide or one high molecular weight PolyEthylenimine, 60% water.
Wird ein Branntkalk mit 0,05 bis 0,1 ß dieser Lösung (bezogen aus das Mahlgut) vermahlen, dann entsteht ein Bindemittßln mit dem sich Kalksandsteine herstellen lassen, deren Rohlingsstandfestigkeit verbessert und deren Druckfestigkeit um 20 bis 70 % gesteigert wird.If a quicklime with 0.05 to 0.1 ß of this solution (based on the millbase), then a binding agent is created with which sand-lime bricks are bonded can be produced, their blank stability improved and their compressive strength is increased by 20 to 70%.
Die Erfindung wird anhand einiger 3beispiele erläutert: Beispiele 1.) Null-Versuch: Branntkalk ohne Zusatzmittel vermahlen: Es wurde Sand mit einer spezifischen Oberfläche von 200 cm2/g, bestehend aus 66 Gew. - RAG 0,2 bis o,6 mm der Quarzwerke Frechen bei Köln und 54 Gew.-% Quarzmehl, Mahlung 1, der Quarzwerke Dörentrup, mit 7 Gew.-% Branntkalk (ohne Zusatzmittel vermahlen) vermischt und mit einer zum Ablöschen des Kalkes ausreichenden Menge Wasser versehen. The invention is illustrated by means of a few 3 examples: Examples 1.) Zero test: grinding quicklime without additives: sand was made with a specific surface of 200 cm2 / g, consisting of 66 wt. - RAG 0.2 to 0.6 mm from Quarzwerke Frechen near Cologne and 54% by weight quartz powder, grinding 1, from Quarzwerke Dörentrup, with 7 wt .-% quicklime (ground without additives) and mixed with a sufficient amount of water to extinguish the lime.
Diese Mischung wurde eine Stunde lang bei 4 atü Sattdampfdruck abgelöscht; nach dem Ablöschen wurde der Feuchtigkeitsgehalt kontrolliert und die Rohmasse auf eine Pressfeuchte von 5 ffi eingestellt. This mixture was quenched for one hour at 4 atmospheres saturated steam pressure; After the quenching, the moisture content was checked and the raw mass was increased set a press moisture of 5 ffi.
2.) DasRohgemisch hatte die gleiche Zusammensetzung wie unter 1: Es wurde ein Branntkalk verwendet, der mit 0,05 % des erfindungsgemässen Zusatzmittels vermahlen wurde. 2.) The raw mixture had the same composition as under 1: A quicklime was used which contained 0.05% of the additive according to the invention was ground.
Die Kalksandsteine aus Versuch 2 hatten nach der Autoklavbehandlung gegenüber denen aus Versuch 1 eine um etwa 25 % höhere Druckfestigkeit. Die Biegezugfestigkeit wurde sn etwa 35 % erhöht. Als Ursache der Festigkeitssteigerung wurde festgestellt, dass ein mit dem erfindungsgemässen Zusatzmittel vermahlener Branntkalk eine höhere Hydratationsgeschwindigkeit aufweist, wodurch schliesslich Calciumhydroxyd kristalle mit grosser spezifischer Oberfläche entstehen. Die Ursache der Erhöhung der Hydratationsgeschwindigkeit konnte nicht mit Sicherheit geklärt werden, wahrscheinlich sind katalytische Effekte wirksam. After the autoclave treatment, the sand-lime bricks from Experiment 2 had about 25% higher compressive strength than those from Experiment 1. The flexural strength was increased by about 35%. The cause of the increase in strength was found to be that quicklime ground with the additive according to the invention has a higher rate of hydration, which ultimately results in calcium hydroxide crystals with a large specific surface area. The cause of the increase in the rate of hydration could not be clarified with certainty; catalytic effects are likely to be effective.
Auch bei der Gasbetonherstellung, bei der durch Verwendung von Branntkalk und anschliessender Autoklavbehandlung Calciumhydrosilikate gebildet werden, ergeben sich beachtliche Festigkeitssteigerungen. Also in the production of aerated concrete, with the use of quicklime and subsequent autoclave treatment calcium hydrosilicates are formed considerable increases in strength.
Kalkmörtel, die Kalkhydrat enthalten, das durch Löschen von mit dem Zusatzmittel vermahlenen Branntkalk hergestellt wurde, zeichnen sich durch grössere Ergiebigkeit und Plastizität aus. Lime mortars that contain hydrated lime, which is obtained by removing with the Additives milled quicklime were made, are characterized by larger Fertility and plasticity.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19702031109 DE2031109A1 (en) | 1970-06-24 | 1970-06-24 | Quicklime treated with flocculant - based on polyacrylic material gives stronger sand-lime bricks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19702031109 DE2031109A1 (en) | 1970-06-24 | 1970-06-24 | Quicklime treated with flocculant - based on polyacrylic material gives stronger sand-lime bricks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2031109A1 true DE2031109A1 (en) | 1971-12-30 |
Family
ID=5774774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19702031109 Pending DE2031109A1 (en) | 1970-06-24 | 1970-06-24 | Quicklime treated with flocculant - based on polyacrylic material gives stronger sand-lime bricks |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE2031109A1 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0313483A1 (en) * | 1987-10-23 | 1989-04-26 | Coatex S.A. | Grinding agent for lime to enhance its reactivity |
| WO1992009528A1 (en) * | 1990-11-21 | 1992-06-11 | Lhoist Recherche Et Developpement S.A. | Method for preparing calcium and/or magnesium hydroxide, and use thereof |
| BE1004609A5 (en) * | 1990-11-21 | 1992-12-22 | Lhoist Rech & Dev Sa | Calcium and/or magnesium hydroxide mixture, preparation method and use ofsame |
| US5173279A (en) * | 1990-11-21 | 1992-12-22 | Lhoist Recherche Et Developpement S.A. | Method and composition for treating flue or exhaust gases utilizing modified calcium hydroxide |
| US5275650A (en) * | 1987-10-23 | 1994-01-04 | Coatex S.A. | Agent for grinding lime to augment its reactivity |
| WO1997006116A1 (en) * | 1995-08-08 | 1997-02-20 | W.R. Grace & Co.-Conn. | Roll press grinding aid for granulated blast furnace slag |
| WO1997039991A1 (en) * | 1996-04-24 | 1997-10-30 | Yabashi Industries Co., Ltd. | Process for producing calcium hydroxide |
| US5705141A (en) * | 1990-11-21 | 1998-01-06 | Lhoist Researche Et Developpement S.A. | Calcium and/or magnesium hydroxide, and preparation and use thereof |
| WO2005056741A1 (en) | 2003-12-13 | 2005-06-23 | Henkel Kommanditgesellschaft Auf Aktien | Adhesion inhibition of micro organisms by non-ionic surfactants |
-
1970
- 1970-06-24 DE DE19702031109 patent/DE2031109A1/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2622127A1 (en) * | 1987-10-23 | 1989-04-28 | Coatex Sa | AGENT FOR GRINDING LIME FOR INCREASING REACTIVITY |
| US5275650A (en) * | 1987-10-23 | 1994-01-04 | Coatex S.A. | Agent for grinding lime to augment its reactivity |
| EP0313483A1 (en) * | 1987-10-23 | 1989-04-26 | Coatex S.A. | Grinding agent for lime to enhance its reactivity |
| WO1992009528A1 (en) * | 1990-11-21 | 1992-06-11 | Lhoist Recherche Et Developpement S.A. | Method for preparing calcium and/or magnesium hydroxide, and use thereof |
| BE1004609A5 (en) * | 1990-11-21 | 1992-12-22 | Lhoist Rech & Dev Sa | Calcium and/or magnesium hydroxide mixture, preparation method and use ofsame |
| US5173279A (en) * | 1990-11-21 | 1992-12-22 | Lhoist Recherche Et Developpement S.A. | Method and composition for treating flue or exhaust gases utilizing modified calcium hydroxide |
| TR27963A (en) * | 1990-11-21 | 1995-11-13 | Lhoist Rech & Dev Sa | Calcium and / or magnesium hydroxide, obtainable and used. |
| US5705141A (en) * | 1990-11-21 | 1998-01-06 | Lhoist Researche Et Developpement S.A. | Calcium and/or magnesium hydroxide, and preparation and use thereof |
| US5977224A (en) * | 1995-08-08 | 1999-11-02 | W.R. Grace & Co.-Conn. | Roll press grinding aid for granulated blast furnace slag |
| WO1997006116A1 (en) * | 1995-08-08 | 1997-02-20 | W.R. Grace & Co.-Conn. | Roll press grinding aid for granulated blast furnace slag |
| US5720796A (en) * | 1995-08-08 | 1998-02-24 | W. R. Grace & Co.-Conn. | Process of using roll press grinding aid for granulated blast furnace slag |
| WO1997039991A1 (en) * | 1996-04-24 | 1997-10-30 | Yabashi Industries Co., Ltd. | Process for producing calcium hydroxide |
| CN1092615C (en) * | 1996-04-24 | 2002-10-16 | 矢桥工业株式会社 | Process for producing clacium hydroxide |
| WO2005056741A1 (en) | 2003-12-13 | 2005-06-23 | Henkel Kommanditgesellschaft Auf Aktien | Adhesion inhibition of micro organisms by non-ionic surfactants |
| EP1692250B1 (en) * | 2003-12-13 | 2009-07-29 | Henkel AG & Co. KGaA | Adhesion inhibition of micro organisms by non-ionic surfactants |
| US7910647B2 (en) | 2003-12-13 | 2011-03-22 | Henkel Ag & Co. Kgaa | Adhesion inhibition of microorganisms by non-ionic surfactants |
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