www.sefindia.org

STRUCTURAL ENGINEERING FORUM OF INDIA [SEFI]

 Forum SubscriptionsSubscriptions DigestDigest Preferences   FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups  RegisterRegister FAQSecurity Tips FAQDonate
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log in to websiteLog in to websiteLog in to websiteLog in to forum 
Warning: Make sure you scan the downloaded attachment with updated antivirus tools  before opening them. They may contain viruses.
Use online scanners
here and here to upload downloaded attachment to check for safety.

When must I take reading in the cube test of concrete, in the first crack or after it fails completely?

 
Post new topicReply to topic Thank Post    www.sefindia.org Forum Index -> SEFI General Discussion
View previous topic :: View next topic  
Author Message
sspawar
...
...


Joined: 05 Jun 2009
Posts: 1205

PostPosted: Wed Aug 23, 2023 2:46 am    Post subject: When must I take reading in the cube test of concrete, in the first crack or after it fails completely? Reply with quote

Dear Frnds


It is every day routine work for a concrete lab and engineers involved to concreting works.
Its a little difference of opinion on compressive strength of a specimen of cubes etc will be at failure of cubes means at reading when it shows any defects like fracture crack splitting crushed down or at last reading at which needle comes back or at which fluctuate, or least of this 2 phenomena.

Generally we look at the dial while suddenly we look at the specimen under test and will confuse where to establish the strength.


Regards
Back to top
View user's profile Send private message
HMK72
SEFI Member
SEFI Member


Joined: 29 Aug 2019
Posts: 1

PostPosted: Wed Aug 23, 2023 6:30 am    Post subject: When must I take reading in the cube test of concrete, in the first crack or after it fails completely? Reply with quote

Dear Sir,IS:516(P1/S1)-2021 mentioned the following for testing of concrete cubes...and there is not mentioned as such for observing the failure cracks and observed the load at first crack or etc, it mentioned as directly read the maximum load reach during test. There may be possibility of increments of some load after first crack also........The mentioning of the failure pattern with report if you find unsatisfactory failure. andI hope this will help us for to establish the strength.Regards,HarjiFrom: "sspawar" <forum@sefindia.org>Sent: Wed, 23 Aug 2023 08:23:39To: general@sefindia.orgSubject: [SEFI] When must I take reading in the cube test of concrete, in the first crack or after it fails completely?Dear FrndsIt is every day routine work for a concrete lab and engineers involved to concreting works.Its a little difference of opinion on compressive strength of a specimen of cubes etc will be at failure of cubes means at reading when it shows any defects like fracture crack splitting crushed down or at last reading at which needle comes back or at which fluctuate, or least of this 2 phenomena.Generally we look at the dial while suddenly we look at the specimen under test and will confuse where to establish the strength.Regards
--

Posted via Email



f5cff.1692771645.97.web.rediffmail.com.png
 Description:
 Filesize:  40.18 KB
 Viewed:  103 Time(s)

f5cff.1692771645.97.web.rediffmail.com.png



67849.1692771645.94.web.rediffmail.com.png
 Description:
 Filesize:  33.9 KB
 Viewed:  122 Time(s)

67849.1692771645.94.web.rediffmail.com.png



6769f.1692771645.92.web.rediffmail.com.png
 Description:
 Filesize:  24.51 KB
 Viewed:  123 Time(s)

6769f.1692771645.92.web.rediffmail.com.png



94c2a.1692771645.99.web.rediffmail.com.png
 Description:
 Filesize:  58.66 KB
 Viewed:  123 Time(s)

94c2a.1692771645.99.web.rediffmail.com.png


Back to top
View user's profile Send private message
sspawar
...
...


Joined: 05 Jun 2009
Posts: 1205

PostPosted: Wed Aug 23, 2023 10:08 am    Post subject: Reply with quote

Dear Frnds,

Yes As per IS 516 its very obvious, and this should be followed a black and white decisive point.


IS: 516 • <o></o>
The load shall be applied without shock and increasedcontinuously at a rate of approximately 140 kg/sq.-cm/min until the resistanceof the specimen to the increasing load breaks down and no greater load can besustained. The maximum load applied to the specimen shall then be recorded andthe appearance of the concrete and any unusual features in the type of failureshall be noted.<o></o>
No one should make argue about point of ascertaining the load carrying by the specimen that it is only at complete failure - when needle gets reversed/ or reading gets reversed and fluctuates

Thanks
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topicReply to topic Thank Post    www.sefindia.org Forum Index -> SEFI General Discussion All times are GMT
Page 1 of 1

 

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


© 2003, 2008 SEFINDIA, Indian Domain Registration
Publishing or acceptance of an advertisement is neither a guarantee nor endorsement of the advertiser's product or service. advertisement policy