TM-II type concrete elastic modulus measuring instrument elastic modulus wholesale price

Type II concrete elastic modulus tester elastic modulus wholesale price
Concrete elastic modulus tester standards and uses:
This product complies with B "Aerated Concrete Mechanical Properties Test Method", B "Test Methods for Mechanical Properties of Ordinary Concrete", "Test Procedures for Cement Concrete in Highway Engineering". Mainly used to measure the elastic modulus of concrete test blocks. This instrument is simple, lightweight and easy to use in experiments.
Concrete elastic modulus measuring instrument classification:
Round
Square
Concrete elastic modulus measuring instrument instrument parameters:
The product complies with the requirements of B and B standard dial indicator. Measuring range~
Center distance between upper and lower rings
Specimen size
Gross weight and net weight
Structure and operation method of concrete elastic modulus measuring instrument:
This measuring instrument consists of an upper ring , lower ring, contact rod, dial indicator and set screw.
Before starting the test, place the elastic modulus measuring instrument on a flat surface, unscrew the set screw of the test block, and install the dial indicator. , loosen the fixing screw of the fixing plate, remove the fixing plate, and the measuring instrument will be positioned on the test block. Place the measuring instrument and the test block on the lower platen of the pressure testing machine, align the center of the test block with the center of the lower platen of the press, and set the dial indicator to zero.
Start the press. When the upper pressure plate is close to the specimen, adjust the ball seat to balance the contact. Load the press continuously and evenly at a speed of (i.e. % of the expected failure load value of the specimen), and then load it at the same speed. Unload to zero and repeat preloading times. During pre-pressure, observe whether the press and dial indicator are normal. The difference in deformation of the micrometer on both sides of the specimen shall not be greater than % of the average deformation, and it must not be in opposite directions. When a cross-section specimen is used, the difference in deformation on both sides shall not be greater than % of the average deformation, otherwise Use hardwood to tap the ball seat to adjust, or adjust the position of the specimen. Carry out the fourth loading at the above speed. Go to the initial load first, then go to the initial load (approximately.), hold, and read the dial indicator △ on both sides respectively, then load to , hold for about 2 seconds, and read the dial indicator △ on both sides respectively. Divide the meter into △, calculate the deformation increment △△ on both sides respectively, and calculate the average value. Set it to △, read △, then unload at the same speed, hold for about seconds, and read the dial indicator readings △ on both sides respectively. Same as above. , carry out the fifth loading, and find out △
The difference between △ and △ should not be greater than .(), otherwise, the above steps should be followed until the difference between the deformation values of two adjacent loadings meets the requirements. The last deformation value △ shall prevail. Then remove the dial indicator, continue loading at the same speed until the specimen is damaged, and record the cyclic axial compressive strength R.
Calculation of test results
The concrete elastic modulus measuring instrument calculates according to the following formula:
Final load ()
Initial load ()
△The fifth or last loading, the average deformation difference on both sides of the specimen under the action of and
()
Gauge length ()
Cross-sectional area of the specimen ()
The arithmetic mean of the test results of the root specimen is the measured value. If the difference between the average values of any core compressive strength exceeds the average %, the calculation shall be based on the arithmetic mean of the test results of the other two specimens. If the results of the two specimens exceed the regulations, the test will be invalid. The results are accurate to
Precautions for the concrete elastic modulus tester:
During the test, handle it with care, especially during transportation, avoid bumping, so as not to affect the test accuracy.
Carry out regular maintenance and upkeep of the equipment and store it in a dry and ventilated place. If the equipment is not used for a long time, it should be powered on regularly to prevent moisture and mold from damaging the equipment and its parts.