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Shotcrete Early Strength Calibration Studies

Multicrete Systems Inc. are specialists in project solutions for the mining and tunnelling industries. Based in Canada, the company operates globally and provides leading-edge technical assistance through expertise with concrete materials and equipment, including construction programs using shotcrete. The development of new shotcrete products – aggregate materials and mix specifications, accelerator additives—and the selection of the most suitable product for a particular solution are areas of expertise which have built Multicrete’s reputation. A mining project raised the opportunity to use a new shotcrete mix for NATM/SEM tunnel design, but had an additional logistical challenge of assessing the early strength with a faster turnaround. Quick evaluation of the strength enables time, and hence cost, efficiencies, but is also safety-critical in determining when the workforce may re-enter the mine. The existing Field Early Strength Shotcrete Testing (FESST) and End-Beam Tester processes involve partial beam compression testing, which was labour-intensive and time consuming, and the equipment was cumbersome to transport, although accurate up to 4 MPa (FESST) and 35 MPa (End Beam). Thus, there was the requirement to speed up this component of the process whilst maintaining accuracy of readings and confidence that the new mix was delivering the desired performance improvements. Multicrete embarked on a thorough, controlled, calibration program at their Flin Flon facility to evaluate how a digital Mecmesin shotcrete penetrometer could help accomplish these objectives.

Shotcrete Early Strength Calibration Studies

A leading force and torque measurement specialist for over 40 years, Mecmesin designs and manufactures affordable, reliable and accurate test measurement equipment to suit a wide range of applications and customer requirements.

Quality Standards
Mecmesin’s range of test equipment is an affordable way to measure force and torque to BS, DIN, ASTM and ISO standards.

Operating under ISO 9001 quality standards, Mecmesin force and torque testers are used to guarantee the quality of components, materials and finished products, direct from the production line or within a QC laboratory. These checks help businesses maximise production and conform to international or in-house standards, whilst reducing the costs associated with excess wastage.

From simple hand-held instruments to fully-comprehensive computer-controlled test systems, Mecmesin designs products to suit many different test applications and budgets.

Force Test Systems
Mecmesin’s force test systems provide machine control of tension and compression testing plus many other test types via the addition of appropriate fixtures, such as flexure/bend, peel, pull-off/pull-out and top-load/crush resistance. A choice of load ratings, including high capacity up to 50 kN, and a range of physical dimensions cater for a broad spectrum of force testing applications.

Torque Test Systems
Mecmesin’s torque test systems provide machine control of the testing methods for all types of torque – breakaway, fastening, running and torque to turn. The ability to simultaneously apply an axial load to the sample is available on all systems. A choice of load ratings cater for a broad spectrum of torque testing applications, with the addition of a range of high precision systems suitable for measuring very low torque values and running with exact rotational alignment.

Application-specific Testers
Mecmesin also supplies a range of application-specific testers, designed to test to test to international standards for a diverse range of distinct test applications, such as coefficient of friction, pull testing of cables, page pull strength of books, automated bottle testing, testing muscle strength and testing sprayed concrete.

Force and Torque Instruments
Mecmesin’s manual force and torque instruments provide digital accuracy in test measurement combined with affordability and portability. Three digital hand-held gauges are available with convenient levels of functionality and ranges of capacity. These gauges can be paired with manual lever or wheel-operated test stands to perform basic tension and compression tests with increased repeatability.

Mecmesin’s range of manual, hand-operated torque testers enable the testing of rotational systems including container caps and tamper-evident closures.

Gripping a sample correctly for testing is a fundamental aspect of test repeatability.  Mecmesin supplies a full range of grips and fixtures for use with all our test systems and instruments.

In addition to our standard products, Mecmesin application engineers can design and manufacture test solutions to meet the needs of unique applications with specific criteria.  These typically include vacuum fixtures for preform packaging, cap mandrels to fit specific designs, grips for control devices with moving parts, jigs for bending awkward or large items, fixtures for torsion springs, guards and containment, and many more…

Our Customers
Providing a tailor-made service to create the ideal system with almost limitless testing capability, Mecmesin test solutions cater for a diverse range of industries:

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