Direct tensile strength test method of inorganic binding material stabilizing material

[0050] Taking cement-stabilized graded crushed stone as an example, the implementation of the direct tensile strength test method for inorganic binder-stabilized materials is described.

[0051] 1) Select the cement-stabilized graded crushed stone CBG25 graded in Table 1 to carry out heavy-duty compaction tests, and determine the optimum moisture content of 5.5% and cement dosage of 6%.

[0052] Table 1 Gradation composition of cement-stabilized graded crushed stone CBG25

[0053] Sieve hole(mm) 26.5 19 13.2 9.5 4.75 2.36 1.18 0.6 0.3 0.15 0.075 Passing rate(%) 99.9 83.4 68.1 57.9 40.2 24.9 16.6 10.7 6.9 5.5 4.1

[0054]2) Since the CBG25 in step 1) is a coarse-grained material, according to the design result in step 1), 15 cylindrical specimens with a diameter×height of φ150mm×300mm were molded.

[0055] 3) Put the test pieces in step 2) in a standard health care room for health preservation, and the health preservation period is 90 days