No spark of fine stone concrete testing method

Don't angry before the inspection method of fine stone concrete. Material misfire identification, grinding wheel can be used to carry out. Test room should be complete darkness, so that it is easy to see in the test. Inspection with the grinding wheel diameter of 150 mm, while the speed shall be the 600 - 1000 r/min, and examine its separation spark in the dark room. Check whether the wheel is unqualified, can be used in the grinding wheel rotates tool steel, quartzite or contain quartzite concrete specimens of spark can occur such as friction, the friction should add 10 - Pressure of 20 n, if there is a clear spark, then the grinding wheel that qualified. Inspection tools, we can detect misfire already made fine stone concrete ground. Validated qualified testing tool for testing the above, such as no spark generated is unqualified, on the other hand, are not qualified!