86 results about "Mold tests" patented technology

The invention discloses a test method and a test device for simulating a high-ground-pressure environment through bentonite slurry pressurization. The test method comprises the following steps of (a) manufacturing a test soil sample on a bottom cover of a test barrel, and molding the test soil sample on the bottom cover; (b) covering the molded test soil sample with a bentonite permeation prevention blanket; (c) smearing the outer surface of the bentonite permeation prevention blanket with bentonite plaster; (d) fixedly mounting the bottom end of the test barrel on the bottom cover, and closing an opening in the upper end of the test barrel through an upper end cover; (e) opening an emptying valve and a liquid inlet valve, switching on a slurry pump, injecting slurry into the test barrel, and closing the emptying valve until an emptying pipe can continuously leak slurry; (f) continuing to inject the slurry into the test barrel through the slurry pump to pressurize the test barrel until the test barrel gets the required pressure, closing the liquid inlet valve, and switching off the slurry pump. The test device can apply high surrounding pressure to a large test piece with a convex-concave surface so as to perform a high-ground-pressure environment simulation test; furthermore, devices such as a model freezing pipe and a sensor which are buried into the test sample cannot be damaged.