The instrumentation at the service of materials

Matériau Ingénierie combines the indispensable skills needed to develop, manufacture and maintain the testing solutions that we offer.

Development of a test method for automatic measurement of concrete porosity

We are currently working on an automatic measurement of concrete porosity ensuring optimal observation conditions.

The porosity of concrete is an important parameter for the implementation of coating preparation of interior floors. The "drop test" is to place a drop of water on the surface of a concrete and observe its disappearance (Technical Specification Book 3469, CSTB, July-August 2003).

Currently, the measurement is performed manually. It gives a high degree of uncertainty because its result is highly dependent on the level of illumination, the amount of liquid deposited, the appreciation of the user ...

To improve the accuracy of the test, it is essential to ensure optimal observation conditions. To do this, we propose a completely automated measurement with image processing to obtain much information about the nature of the observed sample. The instrument in development will place several drops simultaneously, allowing also to extract information on the homogeneity of the material.

 

Figure 1: Observation of the disappearance of a drop of 50 L a) representation of the surface of the drop as a function of time, b) reference image before the deposition of the drop c) image of the drop in maximum spreading and its subtraction with the reference image, d) image of the drop to 15% of its disappearance and subtraction with the reference image.

With this automated processing the slabs are easily distinguishable by the criteria selected. The spreading time and the disappearance time (t1 and t2 in Figure 1-a) or the mean pore size over time are all useful information in order to accurately characterize a slab.

Currently in the testing phase, we quantify the influence of various parameters to select the optimal observation conditions, the ultimate goal being to determine objective criteria for building a relevant test protocol.

  • News

    Restart of the web site.

    Following the massive attack on thousands of websites based on the Joomla operating system, we temporarily put our website offline to prevent our visitors ,being redirected to a false Adobe page, to download malware.

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  • News

    Ashland Training Day

    Three years ago, we moved into new larger premises more suited to our business. This new stage in the development of Material Engineering was the opportunity to invest in spaces (calibration laboratory, testing laboratory) for the reception and training of technicians and technical managers in optimal conditions.


    As such, we recently had the pleasure of receiving employees from several Ashland Group sites: Kehl in Germany, Porvoo in Finland and in France Pujaut. This visit was the opportunity to train these people to different types of rheological test (gel time, crosslinking) using a RheotechTR and to discuss the specific needs related to standards and internal methods used by Ashland. These discussions have also led to the development of new accessories and new software options (see our article on the latest development of RheotechTR).

     

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  • News

    New commercial partner in Thailand

    Chemical House & Lab Instrument is our new business partner (distributor) for Thailand.

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  • News

    New commercial partner in Russia

    Matériau Ingénierie signed a representation agreement with Tirit for Russia, Ukraine, Belarus and Kazakhstan.

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  • News

    New commercial partner in China

    Matériau Ingénierie signed a representation agreement with TecFront for China. 

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  • News

    New website

    Our new website is online! After several months of redesign, we post our new website.

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  • News

    Reinforcement of our service

    Our activity of services has been reinforced to respond better and faster to the needs of our customers.

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  • News

    New Manager

    Stéphane Blanchard replaces François Fesquet to the direction of Matériau Ingénierie.

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  • News

    Trademark Sodemat

    The Sodemat® trademark is registered with the INPI August 2, 2007.

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  • News

    The transfer of Sodemat

    Sodemat activity is transferred to our main site, Saint-Christol-lez-Alès (Gard).

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Matériau Ingénierie

Vallon de Fontanes
2, rue des Acacias
30520 Saint-Martin-de-Valgalgues
France

Téléphone : +33 (0)4 66 92 20 60
Fax : +33 (0)4 66 25 39 80