ZL-SPY concrete expansion mortar vertical expansion rate measuring instrument wholesale price

Wholesale price of the vertical expansion rate measuring instrument of concrete expanding mortar
The vertical expansion rate measuring instrument of concrete expanding mortar is based on the National Standard B Specification for the Application and Design of Concrete Admixtures. This specification is applicable to ordinary water-reducing agents, high-efficiency Water reducing agent, air entraining agent, air entraining water reducing agent, retardant, retarding water reducing agent, retarding high efficiency water reducing agent, early strength agent, early strength water reducing agent, antifreeze, expansion agent, pumping agent The application of fourteen kinds of admixtures such as , waterproofing agent and quick-setting agent in concrete engineering. This test method is suitable for the determination of the vertical expansion rate of expanding mortar for grouting. Technical parameters: Testing instruments and tools should meet the following requirements: Dial indicator: range. Glass plate: length, width and thickness. Test mold: Cube precision test mold. The assembly joints should be filled with butter and no water leaks. Shovel: width, length. Pounding plate : Can be used as a substitute for a hacksaw blade. Steel backing plate: Ordinary steel plate of long, wide and thick thickness
Test methods and steps: The water consumption of the grouting material is based on the fluidity of r. Add water to the grouting material and stir evenly before filling the mold immediately. Pour from one side of the glass plate. When the filling reaches the left and right heights, use a tamping plate to pound each side of the test mold once, and also pound the middle part once. When the filling reaches a high level, do the same again as before and try to expel the gas as much as possible. The last layer of grouting material should be poured in one go until the grouting material flows out from both sides. It is necessary to minimize the upward flushing effect of the grouting material on the glass plate. Use a knife to gently smooth the surface of the grouting material on both sides of the glass plate into a slope, so that the high edge of the slope is level with the glass. The low side of the slope is flush with the inside top surface of the test mold. Slopes should not be mopped for longer than 1 hour. The molding temperature and curing temperature are both ()℃. After completing the slope, hang the dial indicator measuring head on the glass plate and record the dial indicator reading inside. This is the initial reading. After measuring the initial reading, cover the surface of the grouting material on both sides of the glass plate with two layers of wet cotton cloth. From the measuring initial reading, water every other time. Water continuously. Water every other time in the future. Moisturize and maintain to the required age, measure and take height readings of the specimen. Starting from the initial reading, the measuring device and specimen should remain stationary and free from vibration.