DZ/T 0276.2-2015Regulation for testing the physical and mechanical properties of rock. Part 2: Test for determining the water content of rock (English PDF)

Foreword

DZ/T 0276 "Testing Procedures for Physical and Mechanical Properties of Rocks" is divided into 31 parts.

--- Part 1. General and general provisions;

--- Part 2. Rock moisture test;

--- Part 3. Rock particle density test;

--- Part 4. Rock density test;

---Part 5. Rock water absorption test;

---Part 6. Rock hardness test;

--- Part 7. Rock gloss test;

--- Part 8. Rock antifreeze test;

---Part 9. Rock resistance to disintegration test;

--- Part 10. Rock expansion test;

--- Part 11. Rock erosion test;

--- Part 12. Rock acid and alkali resistance test;

--- Part 13. Rock specific heat test;

--- Part 14. Rock thermal conductivity test;

---Part 15. Rock breakdown voltage and breakdown strength test;

---Part 16. Rock volume resistivity and surface resistivity test;

--- Part 17. Rock radioactivity specific activity test;

---Part 18. Rock uniaxial compressive strength test;

---Part 19. Rock uniaxial compression deformation test;

--- Part 20. Rock triaxial compression strength test;

--- Part 21. Rock tensile strength test;

--- Part 22. Rock flexural strength test;

--- Part 23. Rock point load strength test;

--- Part 24. Rock acoustic wave velocity test;

---Part 25. Rock shear strength test;

--- Part 26. Rock mass deformation test (bearing plate method);

--- Part 27. Rock mass deformation test (drilling deformation method);

---Part 28. Rock mass strength test (direct shear test);

--- Part 29. Rock mass strength test (bearing plate method);

--- Part 30. Rock mass bolt load test;

--- Part 31. Rock sound wave velocity test.

This part is the second part of DZ/T 0276.

This part is drafted in accordance with the rules given in GB/T 1.1-2009.

This part replaces DY-94 "Testing procedures for physical and mechanical properties of rock 2. Moisture test". This part is compared with DY-94, the main technology the changes are as follows.

--- Added two chapters "terms and definitions" and "principles";

--- Modified the sample quantity requirements;

--- Modified the drying time of the sample at 105 ° C ~ 110 ° C temperature;

--- Modified the rock moisture test record table.

This part is proposed by the Ministry of Land and Resources of the People's Republic of China.

This part is under the jurisdiction of the National Land Resources Standardization Technical Committee (SAC/TC93).

1 Scope

This part of DZ/T 0276 specifies the gravimetric method for determining rock moisture content.

This section applies to rock moisture test in rock physical and mechanical properties test.

2 Terms and definitions

The following terms and definitions apply to this document.

Water content the ratio of the mass of moisture lost to the quality of the dried sample when the sample is dried under specified temperature conditions is expressed as a mass fraction.

3 Principle

The sample is dried to a constant weight at a predetermined temperature, and the mass of the sample before and after drying is weighed to calculate the water content.

4 Instruments

4.1 Balance. The maximum weighing value is 1000g, and the reading accuracy is 0.01g.

4.2 Drying box.

4.3 Dryer.

5 Sample

Each group of samples is not less than 5 pieces, the mass of the single piece of sample is greater than 150g, and the volume is greater than 60,000mm3.

6 Test steps

6.1 Prepare the sample and weigh it. For loose rock that is not easy to form, it should be tested with a sample box with a sealed lid.

6.2 Place the sample in a dry box and bake for 12 hours.

a) For rocks without crystal water, the drying temperature ranges from 105 °C to 110 °C.

b) For rocks containing crystal water, such as gypsum, salt rock, montmorillonite, vermiculite, etc., the drying temperature ranges from 60 °C ± 5 °C.

6.3 Remove the sample from the drying oven, place it in a desiccator and cool to room temperature, and weigh the sample. The above steps are repeated every 2 hours, straight Until the adjacent two weighing errors are less than 0.1%.

6.4 The contents and format of the test process are shown in Appendix A.