1. หน้าแรก
2. Creep Resistance Test

Creep Resistance Test

 

SECTION 8: Creep Resistance Test

 

Test Procedure:

1. The testing arrangement consists of two fully assembled sleepers fixed at 600 mm in distance, with two pieces of rail each of 2.0 m in length fixed over the four rail seats.
2. A longitudinal load shall be applied in increment load of 1.8 kN with readings taken of longitudinal rail displacement after each increment. Readings of rail displacement shall be the average of the readings of two dial indicators reading to 0.025 mm, one placed on each side of the rails with plungers parallel to the longitudinal axis of rail. The load shall be applied in a direction coinciding with the longitudinal axis of the rail. The load shall be increased incrementally until a load of 20 kN for two rail seats is reached. This load shall be held for not less than 15 minutes.

 

Acceptance Criteria:

The rail shall not move than 5 mm during the initial 3-minute period, and there shall be no more than 0.50 mm movement of the rail after the initial 3 minutes. The fastening shall be capable of meeting the requirements of this test in either direction. If these criteria are met, the tie and fastenings will have successfully passed this test.