Germann Instruments A/S.


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Germann Instruments A/S. GI. Emdrupvej 102, DK-2400 Copenhagen, Denmark Phone: +45 39677117 Fax: +45 39673167 E-mail: germann@post6.tele.dk Web: www.germann.org. Early age strength assessment with LOK-TEST and COMA-Meter. For timing of safe and early loading operations
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Slide 1

Germann Instruments A/S GI Emdrupvej 102, DK-2400 Copenhagen, Denmark Phone: +45 39677117 Fax: +45 39673167 E-mail: germann@post6.tele.dk Web: www.germann.org

Slide 2

Early age quality evaluation with LOK-TEST and COMA-Meter For timing of sheltered and early stacking operations 25 years of considerable development reserve funds archived Instant and dependable data on the genuine in-situ quality Simple and speedy to perform ASTM C 900-99 & BS 1881: Part 207 BCA & BRE "Best Practice Guide for in-situ solid edge structures " Lok-Test for compressive quality planned by COMA-Meter development readings

Slide 3

A rearranged representation is appeared underneath : The LOK-TEST Pullout System A steel circle cast into the solid is pulled against a counterpressure at first glance with an adjusted, water driven pullmachine . A 25 mm circle (an) is thrown into crisp cement at a profundity of 25 mm. After the frame is evacuated, the stem is taken out (b), and a pullbolt strung into the circle. The pullmachine is coupled to the pullbolt. The end of the pullmachine is a 55 mm breadth ring going about as the counterpressure (c)

Slide 4

A specimen pullout LOK-TEST cone, evacuated for examination is delineated in figure (f). The LOK-TEST Pullout System The solid between the plate and the counterpressure is being compacted (d), consequently the pullforce is an immediate measure of the compressive quality. Pulling is done just to disappointment of the solid or to a required quality. The circle is normally left in the structure (e) leaving the surface practically undamaged.

Slide 5

LOK-TEST Inserts From left to right, embeds for pullforce of 0-50 kN: L-40 Control embed for nailing to wooden formwork L-42 Early f or m stripping embed with L-44 steel plate L-45 Insert, circle and stem, string bolted and covered L-49 Floating addition High quality (0-100 kN) variants of the above, utilizing the L-46 plate and stem, are accessible, yet require high quality pullbolt and frill.

Slide 6

LOK-TEST Inserts L-40 Control embed is a L-45 with a Masonite plate screwed to the stem. Four nails are utilized to append the plate to the wooden formwork. At the point when the formwork is evacuated, the plate breaks, leaving the L-45 embed in the solid. The screw and stem are evacuated for LOK-TEST testing.

Slide 7

LOK-TEST Inserts L-42 Early shape stripping addition is a L-45 with a metal washer, nut and screw. The L-44 steel plate and embed are darted to an attachment fitted to an opening cut into the formwork. At the point when the best possible development time is achieved, the fitting and equipment are evacuated for access to the embed for LOK-TEST testing.

Slide 8

LOK-TEST Inserts L-49 Floating supplement is a L-45 with a plastic glass, metal plate, washer and screw joined for testing at first glance. The embed is tilted at a point between 15-25 degrees. Mind must be assumed to appropriately position this embed so that the totals that stream into the pullout disappointment zone speak to the genuine dissemination of the totals in the blend.

Slide 9

Advantage of the LOK-TEST Pullout testing is the main dependable and repeatable technique for on location assurance of the compressive quality of cement. Not at all like the poor connections got from strategies like ultrasound or the bounce back mallet, the LOK-TEST readings are changed over straightforwardly into compressive quality. Various significant connections assumed control in the course of recent years have reliably demonstrated that the soundness of the LOK-Test relationship is unaffected by varieties in sorts of concrete, w/c-proportion, age, curing conditions, air entrainment, admixtures, flyash, and shape/sort and size of totals up to greatest of 40 mm. Just the utilization of lightweight totals has delivered a fundamentally unique connection.

Slide 10

L-10 Bourdon Gage Pullmachine being used. L-11 Electronic Pullmachine being used. Favorable position of the LOK-TEST Timing of early stacking operations and early stripping are solid purposes of the pullout framework. Expanded security, cost reserve funds, and quick track development are the primary advantages when utilizing the LOK-TEST for new structures. LOK-TEST is insignificantly intrusive. Coring makes openings in a structure that debilitates the structure and requires fixing.

Slide 11

Sixteen relationships between\'s pullout constrain and standard barrel compressive quality LOK-TEST Correlations and Confidence Level One of LOK-TEST\'s most grounded favorable circumstances is the steadiness of the connection between\'s the LOK-compel in kN and the compressive quality, chambers, or solid shapes, in MPa. Particularly at early ages, the affectability of the LOK-Test responds to even little contrasts in solid quality

Slide 12

Recommended relationship between\'s pullout compel and standard chamber compressive quality. The 95% certainty levels between the LOK-TEST and chamber quality, for totals sizes 16 mm and 32 mm. LOK-TEST Correlations and Confidence Level As appeared, changes in the LOK-constrain in kN\'s, causes corresponding changes in compressive quality in MPa. Different strategies, for example, ultrasound and bounce back mallets, have an extensive change in compressive quality for an unassuming increment in the speed or bounce back number.

Slide 13

LOK-TEST Pullmachine L-10 LOK-TEST unit Consists of: Standard pullmachine, Bourdon Gage, 0-60 kN , 0.6% precision Calibration table in MPa or PSI Accessories and apparatuses Manual Carrying case

Slide 14

LOK-TEST Pullmachine L-11 LOK-TEST pack Consists of: Standard pullmachine, Electronic Gage, 0-10 0 kN, 0. 2 % precision Amigas II programming on CD-ROM for information exchange Connecting link between LOK-TEST and PC Calibration table in MPa or PSI Accessories and apparatuses Manual Carrying case

Slide 15

COMA-Meter The C O MA-Meter (Concrete Maturity-Meter) measures, in the most basic way, the development of set up cement . A fine tube contains a fluid that dissipates as per the Arrhenius condition for development. The tube is put on a scale in a holder. Taking after throwing of the solid the fine tube is broken at the zero check, strung into the compartment and the holder is squeezed into the new concrete. The temperature in the compartment will rapidly balance out with the temperature of the solid. Vanishing of the fluid in the holder will happen at a rate controlled by the temperature. The level of the fluid - meaningful on the scale - shows the development, the quantity of days (M 20 ), the solid is old at 20ºC (68ºF).

Slide 16

Germann Instruments\' recently framed NDT-Titans assemble offer the accompanying administrations on an overall premise. NDT-TITANS 1) General NDT Seminars 2) Training Courses 3) Implementation Support 4) Testing in the vicinity Group individuals are all very prepared and experienced experts (a normal of more than 20 years) who are advisors and framework engineers. A long time of reasonable NDT field work have sharpened their aptitudes to the most abnormal amount. Preparing on the frameworks, alongside NDT courses and support, some time recently, amid, and after ventures are accessible to our customers on the accompanying site : www.NDT-Titans.com

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