DE430768C - Device for testing the setting time of cement - Google Patents

Device for testing the setting time of cement

Info

Publication number
DE430768C
DE430768C DES68940D DES0068940D DE430768C DE 430768 C DE430768 C DE 430768C DE S68940 D DES68940 D DE S68940D DE S0068940 D DES0068940 D DE S0068940D DE 430768 C DE430768 C DE 430768C
Authority
DE
Germany
Prior art keywords
cement
setting time
testing
recording
time
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
DES68940D
Other languages
German (de)
Inventor
Dr-Ing Wilhelm Harnickell
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens AG
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 by Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Priority to DES68940D priority Critical patent/DE430768C/en
Application granted granted Critical
Publication of DE430768C publication Critical patent/DE430768C/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/416—Systems
    • G01N27/4166—Systems measuring a particular property of an electrolyte

Description

Einrichtung zur Prüfung der Bindezeit von Zement. Die Prüfung der Bindezeit von Zement geschah bisher im allgemeinen in der Weise. daß mittels der Normalnadel ein mit einer bestimmten Wassermenge hergestellter Kuchen auf seine Festigkeit geprüft wurde, in roher. Weise einfach auch durch Drücken mit dem Fingernagel. Dies Verfahren erfordert einmal eine Reihe von Proben für jede einzelne Messung und gibt überdies keine genaue Zeitangabe. Die Messungen sind ferner rein subjektiv, d. h. das Prüfungsergebnis kann durch Fehler des `Beohachiters beeinflußt werden, und der Wert der Messungen hängt von der Zuverlässigkeit des Beobachters ab.Device for testing the setting time of cement. Examining the The setting time of cement has hitherto generally been done in this way. that by means of the Normal needle a cake made with a certain amount of water on his Strength was tested in raw. Way simply by pressing with your fingernail. This procedure requires a series of samples for each individual measurement and moreover does not give an exact time. The measurements are also purely subjective, d. H. the test result can be influenced by errors in the `Beohachiter, and the value of the measurements depends on the reliability of the observer.

Diese Minigel werden gemäß der Erfindung dadurch vermieden:, daß aus dem zu prüfenden Zement Körper geeigneter Form, beispielsweise in Würfelform, gebildet werden, die mit zwei elektrisch leitenden Plattem verschiedener Stoffe, beispielsweise einex Zink- und einer Kupferplatte, zu einem galvanischem Element zusammengesetzt werden, und, daß darauf der zeitliche Verlauf der Klemmenspannung dieses Elementes, der mittels eines vorzugsweise registrierenden Spannungsmessers festgestellt wird, benutzt wird, um die Bindezeit zu ermitteln.These mini-gels are avoided according to the invention: that from the cement to be tested body of a suitable shape, for example in the form of a cube, formed be made with two electrically conductive plates of different substances, for example One zinc and one copper plate, combined to form a galvanic element and that the time course of the terminal voltage of this element, which is determined by means of a preferably registering voltmeter, is used to determine the set time.

Das Verfahren berulit auf der neuen Erkenurtnis, daß die Änderuxvg der Klemmnein spannung eines, wie beschrieben, zusammierrgesetzten Elementes von der AbbRUdefähigkeit des jeweils verwendeten Zements abhängt.The procedure is based on the new finding that the amendment vg the clamping no voltage of an, as described, composite element of depends on the ability of the cement used to break down.

Die Abbildung zeigt die häufig beobachtete Kurve eines normalen. Zementes. Die charakteristische Kurve fällt anfangs steil. ab, verläuft dann nach einem deutlichen Knick bei AI flacher, fällt bei B wiedier stärker ab und geht sogar etwas unter die Nullinie herunter, um bei C plötzlich wieder zu einer kleinen, aber ziemlich konstanten Spannung anzusteigen. Durch Versuche wurde festgestelllt, daß bei B der fühlbare Benn und bei C das Ende der Abbindezeit liegt.The figure shows the frequently observed curve of a normal. Cement. The characteristic curve drops steeply at the beginning. off, then runs after a significant Bend flatter at AI, falls off more sharply at B and even goes under a little down the zero line to suddenly return to a small but pretty one at C constant voltage increase. Experiments have shown that with B the noticeable Benn and at C the end of the setting time is.

Neben der einwandfreien Fixierung des Meßergebnisses auf dem Registrierstreifen bietet das Verfahren noch den Vorteil, daß bei Verwendung eines Vielfachschneibers eine größere Anzahl von Zementproben zu gleicher Zeit untersucht werden kann. Die Bedienung beschränkt sich dann auf das Einsetzen jedes Zementelementes in einen Stromzwdg des Vielfacbschreibers. Die Beobachtung der Zeit ist nicht erforderlich, da die Ablesumg des Meßergebnisses zu beliebiger.Zeit durch Vergleich der aufgezeichneten Kurven erfolgen kann.In addition to the perfect fixation of the measurement result on the recording strip the method still offers the advantage that when using a multiple cutter a larger number of cement samples can be examined at the same time. the Operation is then limited to inserting each cement element into one Stromzwdg of the multifaceted writer. It is not necessary to observe the time because the reading of the measurement result at any time by comparing the recorded Curves can be made.

Claims (1)

PATENTANSPRÜCHE: i. Einrichtung zur Prüfung der Bindezeit von Zement, dadurch-gekennzeichnet, daß an ein oder mehrere galvanische Elemente, die dumch Zusammensetzung einer aus dem zu prüfenden Zement unter Zusatz von Wasser hergestellten Masse mit zwei elektrisch leitenden Körpern aufs verschiedenem Material, vorzugsweise einer Kupfer- und Zinkplatte, hergestellt sind, vorzugsweise registrierende Spannungsmesser angeschlossen sind, wobei die Bindezeit .des Zementes aus dem Auftreten von schnell erfolgenden Spannungsänderungen (Knicken in der Registrierkurve) ezmittel# bar ist. z. Einrichtung nach Ampruch i, dadurch gekennzeichnet, daß als registrierender Spannungsmesser behufs gleichzeitiger Untersuchung mehrerer Zemientproben ein Vielfachsehreiber verwendet wird. PATENT CLAIMS: i. Device for testing the setting time of cement, characterized in that on one or more galvanic elements, the composition of a mass produced from the cement to be tested with the addition of water with two electrically conductive bodies on different material, preferably a copper and zinc plate , are produced, preferably recording tension meters are connected, the setting time of the cement from the occurrence of rapidly occurring tension changes (kinks in the recording curve) being average. z. Device according to claim i, characterized in that a multiple recorder is used as a recording voltmeter for the purpose of simultaneous examination of several cell samples.
DES68940D 1925-02-15 1925-02-15 Device for testing the setting time of cement Expired DE430768C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES68940D DE430768C (en) 1925-02-15 1925-02-15 Device for testing the setting time of cement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES68940D DE430768C (en) 1925-02-15 1925-02-15 Device for testing the setting time of cement

Publications (1)

Publication Number Publication Date
DE430768C true DE430768C (en) 1926-06-26

Family

ID=7500617

Family Applications (1)

Application Number Title Priority Date Filing Date
DES68940D Expired DE430768C (en) 1925-02-15 1925-02-15 Device for testing the setting time of cement

Country Status (1)

Country Link
DE (1) DE430768C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2504681A1 (en) * 1981-04-27 1982-10-29 Le Gorny I METHOD FOR DETERMINING THE KINETIC STRUCTURAL FORMATION OF A BINDER AND DEVICE USING THE SAME
EP0243681A1 (en) * 1986-04-29 1987-11-04 Siemens Aktiengesellschaft Method and apparatus for registering the setting process of an inorganic aqueous binder system
EP0573692A1 (en) * 1992-06-18 1993-12-15 Asanuma Corporation Concrete sensor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2504681A1 (en) * 1981-04-27 1982-10-29 Le Gorny I METHOD FOR DETERMINING THE KINETIC STRUCTURAL FORMATION OF A BINDER AND DEVICE USING THE SAME
DE3215496A1 (en) * 1981-04-27 1982-11-25 Leningradskij gornyj institut imeni G.V. Plechanova, Leningrad METHOD AND DEVICE FOR DETERMINING THE KINETICS OF STRUCTURAL FORMATION IN BINDERS
EP0243681A1 (en) * 1986-04-29 1987-11-04 Siemens Aktiengesellschaft Method and apparatus for registering the setting process of an inorganic aqueous binder system
US4888818A (en) * 1986-04-29 1989-12-19 Siemens Aktiengesellschaft Method and apparatus for the determination of the setting process in an inorganic aqueous binder system
EP0573692A1 (en) * 1992-06-18 1993-12-15 Asanuma Corporation Concrete sensor

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