DE748444C - Process for increasing the adhesion of cement to pressure-resistant, non-porous aggregate in concrete - Google Patents

Process for increasing the adhesion of cement to pressure-resistant, non-porous aggregate in concrete

Info

Publication number
DE748444C
DE748444C DESCH126168D DESC126168D DE748444C DE 748444 C DE748444 C DE 748444C DE SCH126168 D DESCH126168 D DE SCH126168D DE SC126168 D DESC126168 D DE SC126168D DE 748444 C DE748444 C DE 748444C
Authority
DE
Germany
Prior art keywords
cement
concrete
pressure
adhesion
resistant
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
Application number
DESCH126168D
Other languages
German (de)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to DESCH126168D priority Critical patent/DE748444C/en
Application granted granted Critical
Publication of DE748444C publication Critical patent/DE748444C/en
Expired legal-status Critical Current

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
    • 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

Description

Verfahren zur Erhöhung der Haftung von Zement an druckfestem, nicht porigem Zuschlaggestein in Beton Die Gesamtfestigkeit von Zementbeton hingt in hohem Grade von der Haftfestig keit des Bindemittels, also des Zementes an den Zuschlagstoffen ab und diese wiederum von den Beschaffenheit der Oberfläche des Zuschlagstoffes. Die Haftfestigkeit ist um so größer, je rauher und zerklüfteter die Gesteinsoberfläche ist. Es ist deshalb zwecklos, die Druck- und Schlagfestigkeit eines Betons dadurch erhöhen zu wollen, daß man an Stelle eines Zuschlagstoffes von etwa I ooo kg Druckfestigkeit einen solchen von erheblich höherer Druckfestigkeit verwendet, weil bei Iooo bis höchstens II oo kg/cm2 Druck der Zement zerstört wird.Method of increasing the adhesion of cement to pressure-resistant, not porous aggregate in concrete The overall strength of cement concrete depends on a high level Degree of the Haftfestig speed of the binding agent, i.e. the cement on the aggregate and this in turn depends on the nature of the surface of the aggregate. The rougher and more rugged the rock surface, the greater the adhesive strength is. It is therefore pointless to reduce the compressive strength and impact strength of a concrete to want to increase that instead of an aggregate of about 10,000 kg compressive strength one of considerably higher compressive strength is used, because at Iooo to a maximum of 2,000 kg / cm2 pressure the cement is destroyed.

Wohl aber könnte man die Gesamtfertigkeit des Betons erhöhen, wenn man die Oberflächengröße der der Zuschlagstoffe vermehren würde oder wenn man einer glatten Oberiläche der Zuschlagskörnung eine raube, zerklüftete Form gibt, durch die ebenfalls die Oberflächengröße vermehrt wird und zu dem auch noch eine Vergrößerung des mecbanischen Widerstandes der Oberfläche eintritt. Auf dieser Erkenntnis beruht die vorliegende Erfindung.But one could increase the overall skill of the concrete if you would increase the surface area of the aggregates or if you were one smooth surface of the aggregate gives a rough, rugged shape which also increases the surface area and also an enlargement of the mecbanic resistance of the surface occurs. Based on this knowledge the present invention.

Eine rauhe, zerklüftete Oberfläche soll erfindungggemäß dadurch geschaffen werden. daß man das Zuschlagmaterial aus einer Gesteinsart wählt, die im Schmelzfluß entstan den, also vulkanischen Ursprungs ist, wie es z, B. bei Basalt der Fall ist, der deshalb auch hier als bestgeeignetes Zuschlagmaterial gewählt wird, und daß man dieses Gestein nach vorhergegangener starker Erhitzung plötzlich abkühlt.According to the invention, this is intended to create a rough, rugged surface will. that one chooses the aggregate material from a type of rock that is in the melt flow originated, i.e. of volcanic origin, as is the case with basalt, for example, which is therefore also chosen here as the most suitable aggregate material, and that one suddenly cools this rock after previous strong heating.

Erfindungsgemäß bringt man Basalt in --e-eigne. ter horngröß,e in .einen Glühafen oder setzt ihn auf sonst geeignete Weise einer genügend starken Erhitzung- aus, so' daß die erhitzten Stücke bei: einer nachfolgenden schnellen Abkühlung durch überfluten mit kaltem Wasser oder Zufuhr von kalter Luft Risse oder Sprünge bekommen.According to the invention, basalt is brought into your own. the horn size, e in .a annealing port or otherwise suitably set it to a sufficiently strong one Heating- off, so that the heated pieces at: a subsequent rapid Cooling by flooding with cold water or supply of cold air cracks or Get jumps.

Claims (1)

PATENTANSPRUCH: Verfahiren zur Erhöhung der Haftung von Zement all druckfestem, nicht porigem Zuschlag2estein, in Beton, dadurch gekennzeichnet, daß man den Zuschlagstoff oder einen Teil von ihm nach vorlheriger Erhitzung einer schnellen Abkühlung (z. B. durch Überfluten von Wasser) so aussetzt, daß seine Oberfläche Risse oder Sprünge erhält. Zur Abgrentzung des Anmeldungsgegenstandes vom Stand der Technik ist im Erteilungsverfahren folgende Druckschrift in Betracht gezogen worden: deutsche Patentschrift ...... Nr. 336 28 r.PATENT CLAIM: Process to increase the adhesion of cement all Pressure-resistant, non-porous aggregate stone, in concrete, characterized in that one the aggregate or part of it after previous heating a quick Cooling down (e.g. by flooding with water) exposes its surface to such an extent Cracks or cracks. To distinguish the subject of the registration from the stand the technology, the following publication is being considered in the granting procedure been: German patent specification ...... No. 336 28 r.
DESCH126168D 1942-11-19 1942-11-19 Process for increasing the adhesion of cement to pressure-resistant, non-porous aggregate in concrete Expired DE748444C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DESCH126168D DE748444C (en) 1942-11-19 1942-11-19 Process for increasing the adhesion of cement to pressure-resistant, non-porous aggregate in concrete

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DESCH126168D DE748444C (en) 1942-11-19 1942-11-19 Process for increasing the adhesion of cement to pressure-resistant, non-porous aggregate in concrete

Publications (1)

Publication Number Publication Date
DE748444C true DE748444C (en) 1944-11-03

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
DESCH126168D Expired DE748444C (en) 1942-11-19 1942-11-19 Process for increasing the adhesion of cement to pressure-resistant, non-porous aggregate in concrete

Country Status (1)

Country Link
DE (1) DE748444C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017178362A1 (en) * 2016-04-11 2017-10-19 Khd Humboldt Wedag Gmbh Use of treated desert sand as an aggregate for concrete

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE336281C (en) * 1918-11-16 1921-04-27 Erik Christian Bayer Process for treating pumice stone as an aggregate for lightweight concrete

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE336281C (en) * 1918-11-16 1921-04-27 Erik Christian Bayer Process for treating pumice stone as an aggregate for lightweight concrete

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017178362A1 (en) * 2016-04-11 2017-10-19 Khd Humboldt Wedag Gmbh Use of treated desert sand as an aggregate for concrete

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