Concrete modulus of elasticity tester Elastic modulus tester for concrete Concrete Elastic Modulus Testing Apparatus - TM-2

concrete elasticity modulus

Second, the main technical parameters

1, suitable concrete elastic modulus try piece of... 150 x 150 x 300 mm, phi 150 x 300 mm 100 x 100 x 300 mm, phi 100 x 300 mm

2, dial range...... 0-1 mm

3, up, or down the center distance...... link 150 mm

4, from the bottom distance... link 75 mm

Three, structure and operation method

This tester on ring, by the ring, contact the stem, dial and tight set screws composition, (see attached figure) before the beginning of the experiment, the elastic modulus of the detector, which placed, flat spin try out of tight set screw, mount qianbanbiao, send open fixed board tight set screw, take down the plate, the tester has set up a file in the test blocks on location. Tester will together with the test blocks in the pressure test machine under the linking piece, try the block center and press center at the next linking piece, dial indicators for zero. To start the press, when the linking piece and specimens approach, adjust the ball seat, make contact with balanced, to 0.2-0.3 mpa/s speed continuous and even ground added to the Pa (namely specimens of the values of the expected damage load 40%), and then, with the same speed unloading to zero, so repeated preloading 3 times. In preloading, observation and dial press is normal or not. Both sides are the difference of dial indicators deformation, must not be more than 15% of the average deformation, couldn't be more different to the positive and negative, when using 100 mm x 100 mm section when the specimens, the deformation of the difference on both sides, must not be more than 20% of the average deformation, with hardwood tap on a ball or a adjustment, or adjust the position of specimens. The use of such speed fourth add load, first early to load, first early to load PO (about 0.5 MPA), keep the 30 S, both sides were read qianbanbiao enables delta O, then add lotus to PA, protect

concrete elasticity modulus Hold about 30 seconds, read on both sides of the train A dial indicators are calculated respectively on both sides of the deformation value added A-enables delta O accidents, and calculates the average, set to enables delta 4; Read A train at the same rate namely after unloading to PO, keep about 30 seconds, both sides were read qianbanbiao reading train 00, ditto steps, the 5 th add load, seek the train 50 enables delta 5 and enables delta 4 difference should be no more than 0.0002 (L = 150 mm), otherwise, the above steps should be ZhongFu until two adjacent add lotus deformation value difference comply with the requirements to last deformation values enables delta 0 shall prevail. And then dial indicators discharge, with the same speed continue to add to the destruction by specimens, write down the circulation axis compressive strength Ra