Penetration of bituminous materials

To determine the grade of given bitumen. The penetration test is used as a measure of consistency. Higher values of penetration indicate softer consistency.

1. Experiment name : Determination of penetration of bituminous materials Course Code: CE 354 Course Title: Transportation Engineering Sessional I Group Number: 08 Group Members Roll: 47, 48, 49 & 50 Dhaka International University

2. ASTM D5 | BIS:1203 Name of The Experiment: Determination of penetration of bituminous materials

3. To determine grade of given bitumen Test Objectives Significance and use The penetration test is used as a measure of consistency. Higher values of penetration indicate softer consistency

4. Penetrometer Standard penetrometer Automatic penetrometer 2. Needle 3. Water bath 4. Stop watch 5. Thermometer 6. Container 7. Heater 55mm 35mm Apparatus 8. Tray

5. • Heat (75 ° to100 ° C) the sample with care, stirring when possible. ( Figure:- 1) • Do not heat samples for more than 30 min . Preparation of Test Specimen Figure:-1

6. • Pour the sample into the sample container . ( Figure:- 2 ) • Let it cool for 1 to 1.5 h. After that put it in the water bath maintained at the prescribed (25 ° C) test temperature. ( Figure :-3) Preparation of Test Specimen Figure :-2 Figure :-3

7. • Place the Container on the stand of the penetrometer. (Figure:-4) • Position the needle by slowly lowering it until its tip just makes contact with the surface of the sample. (Figure :-5) Procedure Figure :-4 Figure :-5

8. • Note the reading of the penetrometer dial or bring the pointer to zero . (Figure :-6) • Make at least three determinations at points on the surface of the sample not less than 10 mm from the side of the container and not less than 10 mm apart . (Figure :-7) Procedure (Figure :-6) (Figure :-7)

9. • Use a clean needle for each determination . (Figure :-8) Procedure Figure:-8

10. Calculation SL. No. Time (Sec) Initial Reading Final Reading Penetration Avg. Penetration Penetration (In mm) 01 05 105 136 31 30.67 31 02 05 110 142 32 03 05 120 139 29

11. The penetration of bituminous material is 31 Result We found that our sample lies in the range of 30-40 Grade which is recommended for warmer regions. As Bangladesh is a comparatively warm region, this sample is usable for road construction. Discussion

12. Thank you for your attention