DE2911038C2 - Process for the production of high-strength, dense aggregates for road construction or for normal concrete from clayey-silicate raw materials - Google Patents
Process for the production of high-strength, dense aggregates for road construction or for normal concrete from clayey-silicate raw materialsInfo
- Publication number
- DE2911038C2 DE2911038C2 DE19792911038 DE2911038A DE2911038C2 DE 2911038 C2 DE2911038 C2 DE 2911038C2 DE 19792911038 DE19792911038 DE 19792911038 DE 2911038 A DE2911038 A DE 2911038A DE 2911038 C2 DE2911038 C2 DE 2911038C2
- Authority
- DE
- Germany
- Prior art keywords
- raw materials
- clayey
- strength
- road construction
- production
- 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.)
- Expired
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
- C04B33/00—Clay-wares
- C04B33/32—Burning methods
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/04—Heat treatment
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/10—Coherent pavings made in situ made of road-metal and binders of road-metal and cement or like binders
- E01C7/14—Concrete paving
- E01C7/142—Mixtures or their components, e.g. aggregate
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Dispersion Chemistry (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing Of Solid Wastes (AREA)
- Road Paving Structures (AREA)
Description
2020th
Die Erfindung betrifft ein Verfahren zur Herstellung von hochfesten, dichten Zuschlagstoffen für den Straßenbau odei für Normalbeton aus tonig-silikatischen Rohstoffen, die agglomeriert und gesintert werden.The invention relates to a method for producing high-strength, dense aggregates for road construction odei for normal concrete made from clayey-silicate raw materials that are agglomerated and sintered.
Aus der DE-OS 22 00 287 ist ein Verfahren zur Herstellung eines Straßenbaumaterials durch Sintern eines unreinen Bauxites bekannt. Dabei wird der Bauxit in einer bestimmten Korngröße abgesiebt, dann agglomeriert und anschließend schonend gesintert. Um ein entsprechend dichtes Material zu erhalten, muß der übliche Rohbauxit in der Regel zunächst sogar noch gemahlen werden, bevor er durch Sieben in einer bestimmten Korngröße zur Verfügung steht, die geeignet ist, nach einem Knetvorgang oder einem Extrudieren durch Brennen in den Endzustand gebracht zu werden. Nach wie vor weisen derartige Materialien ungünstige Endwerte auf, was im wesentlichen auf besondere Maßnahmen zum Austreiben der zu großen Feuchtigkeit zurückzuführen ist.From DE-OS 22 00 287 a method for producing a road construction material by sintering a known to be impure bauxites. The bauxite is sieved off in a certain grain size, then agglomerated and then gently sintered. In order to obtain a suitably dense material, the usual one must be used Raw bauxite usually has to be ground before it is sieved in a certain way Grain size is available that is suitable after a kneading process or an extrusion through Burning to be brought to the final state. Such materials still show unfavorable final values on, which is essentially due to special measures to drive out the excessive moisture is.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zu schaffen, nach dem aus tonig-silikatischen Rohstoffen hochfeste, dichte Zuschlagstoffe für den Straßenbau oder für Normalbeton herzustellen sind.The invention is based on the object of creating a method according to which from clayey-silicate Raw materials high-strength, dense aggregates for road construction or normal concrete are to be produced.
Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Rohstoffe auf eine Restfeuchte von 5 bis 6 Ge\v.-% vorgetrocknet, anschließend einem Preßdruck von etwa 0,068 N/mm2 unterworfen und dann gesintert werden.The object is achieved according to the invention in that the raw materials are pre-dried to a residual moisture content of 5 to 6% by volume, then subjected to a pressure of about 0.068 N / mm 2 and then sintered.
Mit einem derartigen Verfahren werden somit hochverdichtete Formlinge erzeugt, die in Vebindung mit der gezielt niedrig angesetzten Materialfeuchte anschließend thermisch so behandelt werden können, daß sie ein Endprodukt mit einer dichten Außenschale, hoher Festigkeit und geringer Wasseraufnahme darstellen, das vorteilhaft im Straßenbau und auch für die Herstellung von Normalbeton verwendet werden kann. Aufgrund der besonderen Vorbehandlung des Ausgangsproduktes ist auch eine schockartige Materialbeanspruchung insbesondere durch Hitze möglich, weil das hochverdichtete Rohgut eine wesentlich höhere mechanische und auch thermische Beanspruchung zuläßt. Damit können Ofeneinheiten beispielsweise mit Schubrosten zum Einsatz kommen, welche die keramische Behandlung des körnigen Gutes bis zur Sinterung und Bildung einer Schmelze auf der Kornoberfläche ermöglichen.With such a method, highly compressed moldings are thus produced, which in conjunction with the targeted low material moisture can then be thermally treated so that they a The end product with a tight outer shell, high strength and low water absorption is the can be used advantageously in road construction and also for the production of normal concrete. Because of The special pretreatment of the starting product is also a shock-like material stress possible in particular through heat, because the highly compressed raw material has a much higher mechanical and also allows thermal stress. This allows furnace units with sliding grates for example Use come, which the ceramic treatment of the granular material up to the sintering and formation of a Allow melt on the grain surface.
Nach einer zweckmäßigen Ausbildung der ErfindungAccording to an expedient embodiment of the invention
4545
50 ist vorgesehen, daß Ton, Lehm o.a. tonig-silikatische Rohstoffe verwendet werden. Derartige Materialien werden in solchen Gebieten vorgefunden, wo die für die Herstellung der genannten Zuschläge erforderlichen Gesteine nicht vorhanden sind. Insbesondere in Schwimmlandgebieten, Niederungen an der Küste, Unterläufen von Flüssen und Gebieten rein alluvialen Aufbaues können derartige Materialien abgebaut werden und dann gemäß dem erfindungsgemäßen Verfahren vorteilhaft zu entsprechenden Zuschlagen verarbeitet werden. Das so hergestellte Korn des Zuschlagstoffes weist insbesondere eine hohe Abriebfestigkcii und nur eine geringe Wasseraufnahme auf. 50 it is provided that clay, loam or similar clay-silicate raw materials are used. Such materials are found in areas where the rocks required for the production of the aggregates mentioned are not available. Such materials can be mined in particular in swimming-land areas, lowlands on the coast, lower reaches of rivers and areas with a purely alluvial structure and then advantageously processed into corresponding aggregates according to the method according to the invention. The aggregate grain produced in this way has, in particular, high abrasion resistance and only low water absorption.
Ein einwandfrei körniges Gut auch bei hohen Temperaturen während des Brennprozesses ist gewährleistet, wenn gemäß der Erfindung das Brenngut während des kurzen Brennprozesses mechanisch beansprucht wird. Ein Zusammenbacken des erbrannten und mit Schmelze versehenen Kornes wird so wirksam verhindert.A perfectly granular product is guaranteed even at high temperatures during the firing process, if, according to the invention, the material to be fired is mechanically stressed during the short firing process. This effectively prevents the burnt and melted grain from caking.
Die Erfindung zeichnet sich dadurch aus, daß durch die vorgeschlagene besondere Herstellung des für den eigentlichen Brennprozeß benötigten Rohgutes ein Ausgangsstoff bereitgestellt werden kann, der bei der Herstellung keramischer oder keramisierter Zuschläge einen wesentlich geringeren apparativen Aufwand erfordert und die Möglichkeit gibt, rationell arbeitende Brennvorrichtungen und Ofeneinheiten wie z. B. Brennofen mit einem beweglichen Rost su verwenden. Das nach dem erfindungsgemäßen Verfahren hergestellte Gut ist ein hochfester und dichter Zuschlagstoff und kann wie erläutert für den Straßenbau und auch als Zuschlagstoff für Normalbeton verwendet werden.The invention is characterized in that the proposed special production for the actual burning process required raw material a starting material can be provided, which in the Manufacture of ceramic or ceramized aggregates requires significantly less equipment and gives the opportunity to work efficiently Firing devices and furnace units such as B. Use a kiln with a movable grate see below. That Good produced by the process according to the invention is a high-strength and dense aggregate and can be used as explained for road construction and also as an aggregate for normal concrete.
Über praktische Versuche konnten die geschilderten Eigenschaften bestätigt werden.The properties described were able to be confirmed through practical tests.
Das unter betrieblichen Bedingungen eines Schubrostofens erbrannte Gut, hergestellt in unterschiedlichen Temperaturbereichen der Hitzeeinwirkung, erbrachte folgende Kennwerte:The goods burned under the operating conditions of a sliding grate furnace, produced in different Temperature ranges of the heat effect, produced the following characteristic values:
Rohdichte des Materials:Raw density of the material:
— gesintertes Fertiggut — Brikettform,
schwarz- sintered finished product - briquette form,
black
— gebranntes Fertiggut — Brikettform,
rot- burned finished goods - briquette form,
Red
Wasseraufnahme des gesinterten
Fertiggutes maximal
Betonmischungen mit gesintertem
Fertiggut, schwarzes MaterialWater absorption of the sintered
Finished goods maximum
Concrete mixes with sintered
Finished good, black material
— B 35, Konsistenz K2, Sieblinie AS32 - B 35, consistency K 2 , grading curve AS 32
2,05 g/cm' 5,0 Gew.-%2.05 g / cm ' 5.0 wt%
0,550.55
Zement:
Zuschlag:Cement:
Surcharge:
Wasser:
Wasser:Water:
Water:
Frischbetonrohdichte:
Betonwürfel:Fresh concrete density:
Concrete cubes:
315 kg315 kg
1443 kg(16,1% Natursand,1443 kg (16.1% natural sand,
0,4 mm zugesetzt)0.4 mm added)
172 kg172 kg
61 kg (Aufnahmewasser des61 kg (receiving water of the
Zuschlages)Surcharge)
1,99 g/cm3 1.99 g / cm 3
20 χ 20 χ 20 cm20 χ 20 χ 20 cm
Rohdichte: i. M. 2,02g/cni'Density: i. M. 2.02g / cni '
Druckfestigkeit: i. M. 46,20 N/mm2 Compressive strength: i. M. 46.20 N / mm 2
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19792911038 DE2911038C2 (en) | 1979-03-21 | 1979-03-21 | Process for the production of high-strength, dense aggregates for road construction or for normal concrete from clayey-silicate raw materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19792911038 DE2911038C2 (en) | 1979-03-21 | 1979-03-21 | Process for the production of high-strength, dense aggregates for road construction or for normal concrete from clayey-silicate raw materials |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE2911038A1 DE2911038A1 (en) | 1980-09-25 |
| DE2911038C2 true DE2911038C2 (en) | 1986-03-06 |
Family
ID=6065988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19792911038 Expired DE2911038C2 (en) | 1979-03-21 | 1979-03-21 | Process for the production of high-strength, dense aggregates for road construction or for normal concrete from clayey-silicate raw materials |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE2911038C2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3429506A1 (en) * | 1984-08-10 | 1986-02-20 | Thyssen Industrie Ag, 4300 Essen | Process for the ceramisation of tailings |
| CN112374823A (en) * | 2020-10-27 | 2021-02-19 | 国网甘肃省电力公司经济技术研究院 | High-substitution-rate lightweight aggregate concrete for frozen soil area and preparation method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1019240B (en) * | 1952-03-28 | 1957-11-07 | Kanium Corp | Process for the production of inflated, hollow spherical, thin-walled particles |
| US3844808A (en) * | 1971-01-04 | 1974-10-29 | Ass Portland Cement | Synthetic aggregates made from impure bauxite |
-
1979
- 1979-03-21 DE DE19792911038 patent/DE2911038C2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2911038A1 (en) | 1980-09-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2918564A1 (en) | Refractory materials containing a mixed crystal with spinel structure | |
| DE2335146A1 (en) | PROCESS FOR MANUFACTURING CERAMIC FOAM | |
| DE3326599A1 (en) | Process and production of light concrete bricks, breeze blocks and hollow breeze blocks from ceramicised bituminous coal dressing wastes | |
| DE3306423C2 (en) | ||
| DE2911038C2 (en) | Process for the production of high-strength, dense aggregates for road construction or for normal concrete from clayey-silicate raw materials | |
| DE2729696A1 (en) | PROCESS FOR MANUFACTURING MINERAL WOOL PRODUCTION | |
| DE2200002A1 (en) | Heterogeneous mixtures with high melting points | |
| DE1471217C2 (en) | Basic refractory materials in the form of molded bodies made of magnesium oxide and chrome ore | |
| DE849073C (en) | Process for the production of components | |
| DE1571614A1 (en) | Refractory bricks and processes for their manufacture | |
| DE2718469C2 (en) | Ceramic insulating bricks and processes for their manufacture | |
| DE3210140C2 (en) | Process and its application for the production of forsterite stones with low density and low thermal conductivity | |
| DE1646837C2 (en) | Process for the production of refractory, in particular unfired, magnesite chrome and chrome magnesite bricks | |
| DE1471227B2 (en) | BASIC REFRACTORY PRODUCT AND PROCESS FOR ITS MANUFACTURING | |
| DE2307734A1 (en) | Light esp visible concrete for building - contg. coarse aggregate and fine aggregate consisting of blast furnace slag sand, helping to improve heat insulating properties | |
| DE1154753B (en) | Process for the production of porous, ceramic, granular materials | |
| DE928039C (en) | Process for the production of porous insulating materials | |
| DE3421529A1 (en) | CHROMMAGNESIA PAMPING MASS | |
| AT205401B (en) | Basic, refractory bricks | |
| AT349376B (en) | METHOD FOR MANUFACTURING COMPONENTS | |
| DE2117033C3 (en) | Process for making a sintered dolomitic refractory material | |
| DE412644C (en) | Process for the production of heat-resistant material | |
| DE1646838C2 (en) | Process for the production of refractory, burnt magnesite chromium and chromium magnesite bricks | |
| DE3020006C2 (en) | Process for the production of moldings from the airborne dust from power plant furnaces and / or heating plant furnaces | |
| AT325496B (en) | PROCESS AND SYSTEM FOR THE PRODUCTION OF SINTER MAGNESIA, SINTER DOLOMITE, SINTER LIME OR THEIR MIXTURES |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OAP | Request for examination filed | ||
| OD | Request for examination | ||
| D2 | Grant after examination | ||
| 8364 | No opposition during term of opposition | ||
| 8339 | Ceased/non-payment of the annual fee |