Penetration Test of Bitumen-Procedure, Apparatus, and Uses for Road Construction
Penetration test of Bitumen determines the hardness or softness of bitumen by measuring the depth in millimeters to which a standard loaded needle will penetrate vertically in five seconds while the temperature of the bitumen sample is maintained at 25 0C.
Interested One: What is Shoring? Types and Uses
Also, the Penetration test of bitumen is used to measure the consistency of bitumen. This test is applied almost exclusively to bitumen. For Tars, cutbacks, and emulsions other consistency tests are used.
Equipment for Penetration test
A penetrometer consisting of a needle assembly with a total weight of 100 grams and a device for releasing and locking needles in any position.
To read the penetration value, a graduated dial is attached as shown in Fig. 1. Penetration value can be read with this dial up to 0.1 mm.
Procedure for Penetration Test of Bitumen
- The bitumen is softened to a pouring consistency, stirred well, and poured into the test containers. The depth of bitumen in the container is kept at least 15mm more than the expected penetration. (I.S. 1203-1958). Related:- California Bearing Ratio(CBR Test) of Subgrade Soil -Procedure, apparatus, and use for pavement Design
- Now the sample containers are placed in a temperature-controlled water bath at a temperature of 25 c for one hour.
- Then at the end of one hour, the sample is taken out of the water bath and the needle is brought in contact with the surface of the bitumen sample at that time reading of the dial is set at zero or the reading of the dial is noted when the needle is in contact with the surface of the sample.
- After that, the needle is released, allowed to penetrate for 5 seconds, and the final reading is recorded. At least three penetration observations on that sample should be taken at distances at least 10 mm apart. After each test, the needle should be disengaged, wiped with benzene, and dried. The amount of penetration is recorded as shown in Fig. 2.
- The main value of the three measurements reported is the penetration test.
- The accuracy of the test depends upon the pouring temperature, the size of the needle, the weight placed on the needle, and the test temperature.
- The grade of bitumen is specified in terms of penetration value. For example, 30/40 grade bitumen indicates the penetration value of the bitumen in the range of 30 to 40 at standard test conditions.
Readings are taken as units of penetration
Where, 1 unit = (1/10) mm
i.e. If penetration value is N,
Distance penetrated = (N/10) mm.
Also Read: Field Density Test of Soil by Core cutter method for soil compaction
Precautions during Penetration Test
- The container should not be moved while the needle penetrates the sample.
- The sample should be free from any external materials.
- Benzene is used to clean up the needle and dried before penetration.
Penetration test of bitumen is applied exclusively to bitumen. Tars being soft, penetration tests on these materials cannot be carried out.
Penetration value of different types of bitumen used in road construction ranges between 20 to 225. However, 30/40 and 80/100 grade bitumen is more common for road construction depending upon the type of construction and climate conditions. In hot 30/40 bitumen is preferred.
The value of temperature affects the use of the bitumen. A lower penetration grade is used in warm climate conditions to avoid softening and a high penetration grade range of 180/210 is used in cold climate conditions to prevent it from excessive brittleness.
In the last word, the Penetration test of Bitumen is used for the Garde of bitumen material in terms of its hardness. A 70/100 grade bitumen shows that its penetration value lies between 70 & 100.
You’ll also like:
- Ductility Test of Bitumen and uses for Road construction
- What is irrigation system|surface irrigation
- Test of Bitumen | composition test and uses for pavement construction with
- CONSTRUCTION FACILITIES IN CIVIL CONSTRUCTION INDUSTRIES
- Adverse effect of Concrete
- Types of Scaffolding Used in Construction and Parts
I’m not sure where you’re getting your info, but good topic.
I needs to spend some time learning much more or understanding more.
Thanks for wonderful info I was looking for this information for my mission. http://www.bigdaddysorlando.com/
Asking questions are truly fastidious thing if you are not understanding something fully, except this article gives fastidious understanding yet. https://Www.nlrbfcu.org/the-near-future-report-review/
thank you for the comment.
Thank you for comment.
This information is worth everyone’s attention. Where can I
find out more? http://www.Vintagehouserestaurant.com/
Why users still use to read news papers when in this technological world the
whole thing is existing on web? http://oldehickorytaproom.com/
Thank you
When I initially commented I clicked the “Notify me when new comments are added” checkbox and now
each time a comment is added I get several emails
with the same comment. Is there any way you can remove me
from that service? Bless you!
I’m amazed, I have to admit. Seldom do I encounter a blog that’s both equally
educative and engaging, and without a doubt, you have hit the nail on the head.
The problem is an issue that not enough people are speaking intelligently about.
I am very happy I came across this during my search for something regarding this.
After checking out a handful of the articles on your
web site, I seriously like your technique of
writing a blog. I saved as a favorite it to my bookmark site list and will be checking back in the near future.
Please visit my website too and tell me how you feel.
Brilliant article! We will interface this especially extraordinary substance on our site.
Keep up the great composition.
Thank you .
This is a really helpful post and very informative there is no doubt about it. I found this one pretty fascinating and it should go into my collection. Very good work!
Thank you
It’s actually a great and helpful piece of info. I am satisfied that
you simply shared this helpful info with us. Please keep us informed like this.
Thank you for sharing.
Thanks for posting this info. I just want to let you know that I just check out your blog and I find it very interesting and informative. I can’t wait to read lots of your posts. Thanks alot! Know about Garmin Express Update.
Thank you for the comment.
Your article is quite helpful! I have so many questions, and you have answered many. Thank you! Such a nice and superb article, we have been looking for this information about penetration test of bitumen . Indeed a great post about it!!If possible visit this website Csiscan.nz to gain more idea or tips on the same.
Hi there, I believe your web site may be having internet browser compatibility issues. Whenever I look at your site in Safari, it looks fine but when opening in Internet Explorer, it’s got some overlapping issues. I simply wanted to give you a quick heads up! Aside from that, fantastic blog!
Thank for the comment.
I love what you guys tend to be up too. Such clever work and coverage!
Keep up the wonderful works guys I’ve added you guys to my personal blog.
Thanks for this information. I intend to become a materials Engineer.
Thank you for this wonderful post, great article, keep up the excellent work.
I must say, I’m thoroughly impressed with the quality of your content. It’s evident that you put a lot of effort into crafting informative and engaging blog posts. Keep up the excellent work, and I look forward to reading more from you in the future. Thank you for sharing your knowledge with us.
Bitumen 60/70 is a semi-hard penetration grade bitumen commonly used in road construction and repair. It is suitable for producing asphalt pavements and is characterized by its specific technical specifications. This grade of bitumen is primarily utilized in the production of hot mix asphalt for base and wearing courses. It is the most commonly used grade and serves as a fundamental material for various other bituminous products.