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2. Schmidt hammer - Wikipedia

   en.wikipedia.org/wiki/Schmidt_hammer

   A Schmidt hammer, [1] also known as a Swiss hammer or a rebound hammer or concrete hammer test, is a device to measure the elastic properties or strength of concrete or rock, mainly surface hardness and penetration resistance. It was invented by Ernst Heinrich Wilhelm Schmidt, a Swiss engineer. [2]

3. Proceq - Wikipedia

   en.wikipedia.org/wiki/Proceq

   Proceq has its own research and development team, based at the headquarters in Switzerland. Two major patents have been produced by this team. The first was the Original Schmidt test hammer, the second was the Leeb rebound principle (named after the Proceq scientist Dietmar Leeb). This principle is employed in the Equotip metal hardness tester. [3]

4. Compressive strength - Wikipedia

   en.wikipedia.org/wiki/Compressive_strength

   Cubic or cylindrical samples of concrete are tested under a compression testing machine to measure this value. Test requirements vary by country based on their differing design codes. Use of a Compressometer is common. As per Indian codes, compressive strength of concrete is defined as: Field cured concrete in cubic steel molds (Greece)

5. Properties of concrete - Wikipedia

   en.wikipedia.org/wiki/Properties_of_concrete

   For practical immediate considerations, it is incumbent to accurately test the fundamental properties of concrete in its fresh, plastic state. Field cured concrete in cubic steel molds (Greece) Concrete is typically sampled while being placed, with testing protocols requiring that test samples be cured under laboratory conditions (standard cured).

6. What is COVID rebound? Doctors explain common symptoms ... - AOL

   www.aol.com/news/covid-rebound-doctors-explain...

   “COVID rebound is a recurrence of COVID symptoms after initial improvement or a new positive test after a negative one,” Dr. Scott Roberts, associate medical director of infection prevention ...

7. I’m a behaviorist – here’s how to keep your dog calm over the ...

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