BC-300 type (ordinary/digital display) cement ratiometer wholesale price

Type B (ordinary digital display) cement ratiometer wholesale price
1. Purpose of cement ratiometer:
Suitable for use in accordance with the "Cement mortar drying shrinkage test method", " Determination of cement mortar and cement mortar in accordance with the requirements of Article 1 of "Cement and Concrete Test Regulations for Highway Engineering", "Test Method for Basic Performance of Construction Mortar", B "Test Method for Drying Shrinkage of Air-entrained Concrete", B "Pebbles and Gravel for Construction" The dry shrinkage rate of the specimen at each age can also be determined according to the requirements of the "Test Method for Expansion Rate of Expansive Cement" and "Method for Physical Inspection of Self-Stressed Cement" to limit the expansion rate and self-stress value.
The digital display length ratio meter is suitable for high-precision expansion and contraction rate measurement according to the requirements of "Concrete Expansion Agent" and other test methods.
2. Main technical parameters of cement length ratiometer:
Type BⅡ
Measuring range: Same as left
Standard rod length. Same as left
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Measuring instrument: Dial indicator, digital dial indicator
Range:
Accuracy: (gradation value) . .
Coaxiality between the upper and lower clamping holes and the support: ＜. Same as left< br/> Weight: approx. Same as the left
Dimensions: (length, width and height) Same as the left
3. Introduction to the structure of the cement length ratio meter:
The instrument mainly consists of a column, a base, a clamping frame and a measuring Instrument table composition. The lower end of the column is inserted into the base and screwed to the base with nuts. It should not be disassembled frequently. One end of the clamp is inserted into the pole and clamped on the column through the locking screw. The locking screw should tighten the column after the clamping frame is adjusted in place to prevent rotation or sliding. The other end of the clamping frame is used to insert the measuring instrument and clamp it with the locking screw or loosen it to adjust the measuring instrument to move up and down. The lower support is screwed on the base with a nut for inserting the test piece. It is generally not suitable to be disassembled. One end of the top leg is a pit. During the test, it should be inserted into the top of the test piece. The thread on the other end is fastened to the measuring instrument. Pay attention to the same. axis degree.
4. Use and maintenance of cement comparator:
When the comparator is used as a cement drying shrinkage test or to measure expansion rate and self-stress value, it is necessary to use a standard specimen with spherical tips at both ends and Corresponding molding and maintenance methods. The instrument should be placed stably on a rubber pad in a vibration-free environment. The room temperature in the test room should be preferably controlled at ℃. Before placing the test piece for each test, the surface of the top of both ends of the test piece should be wiped clean, and at the same time, use a slightly damp cotton gauze to clean the top surface. Clean the upper and lower supporting surfaces of the instrument (referring to the lower supporting holes and contact holes) to prevent sand particles from falling in and affecting the measurement accuracy. Then calibrate the zero point of the dial indicator (you can tap the surface glass with your finger to set the needle position). When reading, the test piece can be moved slightly to ensure that the top of the test piece is in correct contact with the upper and lower supporting surfaces of the instrument. The measurement should be accurate to .mm or .mm. If the pointer swings, the average reading within the swing range can be taken. If the instrument will not be used for a long time, after cleaning the surface, apply a thin layer of machine oil on the non-plated surface and cover it with a plastic film to prevent corrosion.
5. For details on the calculation formula of measurement results, please refer to relevant standards and test procedures such as , .