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


Acid Reactivity on Aggregates

Acid Reactivity on Aggregates

Acid Reactivity on Aggregates

I am working on a Dam project in which fine and coarse filter layers will be placed.

The contractor, nearby the area, has a huge stockpile of rounded aggregates (from a river around the project). Engineering team decided to test aggregates, once they got crushed, in order to verify the Acid Reactivity percentage of the limestone portion.

According to results, there were more than 30 reactive particles (from a 20 grams sample), so these aggreates will not be allowed to be used as fine and coarse filter for the dam.

I was wondering, if anyone knows any reference which could provide an improvement of these aggregates to somehow reduce the acid reactivity level of the limestone portion. Probably by adding something.

Please let me know,


RE: Acid Reactivity on Aggregates

What is in contact with the aggregate that will create an acid background? Most limestone shows some degree of acid reaction... it's a consequence of the minerals that limestone is composed of.

Most concrete has a pH of 12 or so and is fairly alkaline... and most limestone works well with it. There are some aggregates that have an alkaline type of reaction; these don't normally work well.


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!


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