Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Different Types of Water Reducers 1

Status
Not open for further replies.

yahoo123

Bioengineer
Joined
Nov 6, 2007
Messages
87
Location
US
Can somebody explain to me what is the difference between, normal, mid range, and high range water reducers?

Thanks!
 
Water reducing admixtures change the properties of fresh concrete, but still allow a predictable and acceptable final product. They allow they allow concrete to be batched in either of two ways:

1. Use less water but the concrete retains expected workability. Within reason, less water tends to give stronger concrete.

2. Use the specified amount of water but the concrete will have improved flowabilty without loss of air entrainment or slowing the setting time.

The words you reference, "normal", "mid range" & "high range" are relative measures of how much effect each product has on the concrete. Since each admixture manufacturer has their own definition of what those words mean, it is not really possible to give specific "generic" definitions.

[idea]

[r2d2]
 
ASTM C494 "Standard Specification for Chemical Admixtures for Concrete" gives the following definitions:

Water-Reducing Admixture - An admixture that reduces
the quantity of mixing water required to produce concrete of a given consistency.

Water-Reducing Admixture, High Range — An admixture
that reduces the quantity of mixing water required to produce concrete of a given consistency by 12 % or greater.

 
Status
Not open for further replies.

Part and Inventory Search

Sponsor

Back
Top