Setting time of Concrete

by KINGSHUK
(KOLKATA,INDIA)

Q. OUR CONSTRUCTUAL REQUIREMENT IS CONCRETE(REINFORCED) SHOULD BE POURED WITHIN 2HOURS FROM WATER ADDED TO CEMENT. I WANT TO KNOW IF 2 HOUR IS OVER ,THEN ANY EFFECT IN CONCRETE?

The main effect is the concrete has already started to set in the concrete truck if it is 2 hours old. It will take more mixing water to make it workable which will weaken the mix further.

If you add a retarder to the concrete mix you could get away with the 2 hour time limit. This will depend on the air temperature and the mixing water temperature.

Without any chemicals to slow the set time of the concrete, you will risk weaker concrete and more shrinkage cracking due to the added water to make it workable.

Click here to post comments

Join in and write your own page! It's easy to do. How? Simply click here to return to General Concrete Questions.

Facebook X

One more way to share everything-about-concrete.com

Would you prefer to share this page with others by linking to it?

Click on the HTML link code below.
Copy and paste it, adding a note of your own, into your blog, a Web page, forums, a blog comment, your Facebook account, or anywhere that someone would find this page valuable.

Hi, I am Mike Day, owner of Day’s Concrete Floors, Inc. in Maine. I've been working with concrete for 40 years now, and this website is where I can share with you all the knowledge, wisdom and expertise I've gained from installing all kinds of stamped concrete, concrete floors, concrete overlays, concrete slabs and also repairing & fixing cracked or spalled concrete.

There’s a lot to cover, so if you have any questions, contact me!