×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Sprayed Concrete Early Strength Testing

Sprayed Concrete Early Strength Testing

Sprayed Concrete Early Strength Testing

(OP)
My Question: is there an alternative to Hilti's DX450-SCT test method (https://www.hilti.co.uk/fstore/holuk/techlib/docs/DX450_SCT_Leaflet_en_W3636.pdf) for early strength testing of insitu sprayed concrete (shotcrete/gunite)?

This is for testing the compressive strength in the range of 3 MPa to 16 MPa. There is a European standard which covers this (EN 14488-2 method B) but as far as I can tell Hilti are the only company that manufacture something which covers this.

RE: Sprayed Concrete Early Strength Testing

How early are you talking about??

RE: Sprayed Concrete Early Strength Testing

just take samples and get an early break. we usually spray a box the same time as spraying then cut cores. three day breaks are common. check ASTM

ICC special inspector, Structural masonry, Reinforced concrete.

RE: Sprayed Concrete Early Strength Testing

(OP)
For the strength in question; 1-6hrs depending on mix design. I agree that coring is a possibility but very expensive to have an on-site lab to test so quickly.

I am not familiar with the ASTM standards (being a european), is there one that prescribes an alerternative?

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources