Specific Gravity of Fine Aggregates | Test on Fine Aggregates
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- Опубликовано: 24 авг 2024
- Learn to find Specific gravity of Fine Aggregates with detailed procedure, tabulation column.
THEORY:
Aggregates are divided into two categories based on consideration of size.
1) Aggregates whose size is greater than 4.75mm is considered as Coarse Aggregates.
2) Aggregates whose size is 4.75mm and less is considered as fine aggregate.
The specific gravity of an aggregate is defined as the ratio of the mass of a given volume of sample to the mass of an equal volume of water at the same temperature.
The specific gravity is generally required for calculations in connections with concrete mix design, for determination of moisture content and for the calculations of volume yield concrete. The specific gravity also gives information on the quality and properties of aggregates. If the specific gravity is above or below that normally assigned to a particular type of aggregate, it may indicate that shape and grading of aggregate has altered.
Water absorption influences the behavior of aggregates in concrete in several important aspects. A highly absorptive aggregate if used in dry condition will reduce effective water cement ratio to an appreciable extent and may even make the concrete unworkable unless a suitable allowance is made. Hence determination of absorption of aggregate is necessary to determine net water cement ratio.
APPARATUS:
1) Fine Aggregate
2) Pycnometer
3) Distilled Water
4) Tray
5) Weighing Balance
PROCEDURE:
1)Take 1/4th of sample and place it in the Pycnometer.
2) Pour distilled water into it until it is full.
3) Eliminate the entrapped air by rotating the Pycnometer on its side, the hole in the apex of the cone being covered with a finger.
4) Wipe out the outer surface of Pycnometer and weigh it.
5) Transfer the contents of the Pycnometer into a tray, care being taken to ensure that all the aggregate is transferred.
6) Refill the Pycnometer with distilled water to the same level and record the weight.
9) Calculate Specific Gravity with the formula
I Thank Prof. Pradeep Kulkarni for shooting the video
I thank my institution KLS Shri Vasantrao Potdar Polytechnic for allowing me to carry out the experiment
#specificgravityoffineaggregates #specificgravity #testsonaggregate
He is God for students❤
I am a passionate teacher who loves to teach students and pass the knowledge, very happy about your comment but I am a small person kindly dont say me GOD, keep watching and sharing, all the very best
Excellent sir 👍 thanks you so much
As per IS 456:2000 clause 13.2 the maximum permissible free fall of concrete to avoid segregation is 1.5m or 150mm
Not 150mm this is 1500mm
Very helpful
You are nice teachers
Thank you so much, all the best, keep sharing
Carry on sir with these kind of experiments 🙏
Sure Pankaj, keep watching
Thank you Sir 🙏
Most welcome, all the best, keep watching
Hlw sir
Please tell why sand sample use only 1/4 of hight
Very helpful video thank you sir ❤️
It is better to remove air bubbles using vacuum pump before fully filling the pycnometer + sample with water.
Sir please explain specific gravity of coarse aggregates of individuals aggregates for bc mix design
expain kijeye ..
Please, can I know the standard using to obtain the specific gravity using this process?
2386 part 3
10mm Sieve also used in both
Nice video sir
Thanks a lot, keep watching and keep supporting
Very nice sir
Thanks and welcome
Fill the pycnomiter with water after shaking
Gjb video sir
Thank you
@@structuralanalysisanddesign sir aap ka number kay hai
1.5mtr is the maximum free fall of aggregate
Thank you sir...pls tell me "water absorption" formula also sir
Thanks sir 👍👌.
Most welcome, All the best
1.5m
In this SSD wt and oven dried wt we don't sir,this is my doubt
Please suggest me IS code for specific gravity and water absorption testing
I dont understand why specific gravity of sand is not used as DENSITY OF SAND DIVIDED BY DENSITY OF WATER like the other.
4.75 mm
1.5 metre is the maximum free fall height for concrete
As per latest revision it is 1.8 m
Sir According To Is Code Oven Is Important Thing during Test
But you are not using oven in entire period of Test
I'm little bit confused What to do at Site
Exactly Deepak IS code says you have to keep the sample in oven before testing at 110 degrees for a period of 24 hours but always it is not possible at site and also in academics, you can take sample which is completely dry and perform the test, if the sample is completely wet or it has water content than strictly you have to keep it in oven, the sample i used in video was fully dry.
@@structuralanalysisanddesign Thank you So Much Sir
Sir Can you share your contact or Social ID....I have some problems
we have FB page with same name, contact me there
Oven used for find a water absorbtion
1.5 m
Free fall concrete 1.5m
1500mm height
It is suitable for coarse aggregate?
1.5 metre
🔥🔥🔥💯💯💯💯
4.75mm
1.5 meter
Sir video accha h but baground noice bhut aa rhi h 🔥
1.5 mtr free fall height of concrete
🔥
Sir ,How many time determine the sp.gravity of fine aggregate in month?
Change of source
1.5
150mm
150 mm
1.5meter to 2
why didnt u soak the sample for 24 hrs... why dont u make the sample to ssd condition.. this is wrong broo
1.5 Meter
60
1.5m or 150cm
1.8 meter
Plz make a video,,,, in Ultimate tensile strength test,,,with calculation.
1.5 m sir fall of concrete
This is not according to is code 2386 part 3....
Please do not confused the people..
Explain every things...Please 🙏
Hmare yha bolte hain adhura gyaan dangerous hota hai
3.5
3.5 meters
1 mt
1 meter is maximum height
👍
Why specific gravity needed in mix design?
Why pycnometer why not any vessel filled fully this is just making complicated for an easy experiment. Make it easy make it simple
Its according to standards, check the IS codes
1.5m
4.75 mm
1.5 m
1.5m
1.5 m
1.5 m