×
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

Retarder

Retarder

Retarder

(OP)
The top slab with webs of a box girder is to be poured over prepoured concrete slab in such a way that the whole concreting for this 52 m span bridge supported over truss type scaffolding spanning between the piers is completed before any concrete starts setting to avoid putting any stress in the concrete.

The estimated pouring time for the concrete is about 8 hours and the setting time is 4.15 hours.

Some type of retarder can be used. Please advise the right type of retarder or some alternative method to keep the poured concrete green until all concrete is poured in about 8 hours.

RE: Retarder

if you are in Europe consult www.pieri.com
or in america www.apchem.com

they have an experience special retarder, I used to XL TARD or XL STAB

best regards

RE: Retarder

Pinki,
Sika-Retarder is a set retarding concrete admixture available in either powder or liquid form. U need to contact your local Sika agent ( depending on where u r ) for expert details as a prestigious project is under implementation.
I have used Sika products extensively and applaud its usage.
Sika-Retarder dosage is between 0.2 to 2% of cement weight. At 30 degrees centigrade u need about 1% if cement content is 300kg/m3. Initial set time will be extended by 8 hours.

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! Already a Member? Login


Resources

Research Report - How Engineers are Using Remote Access
Remote access enables engineers to work from anywhere provided they have an internet connection. We surveyed our audience of engineers, designers and product managers to learn how they use remote access within their organizations. We wanted to know which industries have adopted remote access, which software they are using, and what features matter most. Download Now
eBook - Managing the Context of Product Complexity Using the Digital Twin
Keeping track of changes to complex products is difficult—think Aerospace & Defense equipment, new generations of commercial aircraft, and software-based automobiles. A new way to managing the digital context of the physical product is required and the answer is the Digital Twin. This ebook explores the opportunity available for Operations and Maintenance for the Digital Twin. Download Now
White Paper - Trends in Industrial Filtration
Substantial progress has been made in filtration technologies in recent years. New filter media materials, designs and processes have led to filters that are more efficient, reliable, compact and longer lasting. This white paper will discuss the various trends that are impacting operational responsibilities of MROs today and the resources that are available for staying up-to-date on the latest filtration solutions. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close