Cement Additives 1

[cateng]

I was wondering if anyone knew of any water reducing agents or fluidising agents to use in a cement mortar mix that lines pipes which convey potable water.

The additive must be safe to use with potable water. We are hoping to reduce segregation, increase fluidity (easier on our pumps etc.)

 

[jheidt2543]

I would suggest the following:

1. Contact your pump manufacturer, they certainly must test a variety of mix designs with and without additives on their equipment.

2. Contact Master Builders they manufacture a complete line of additives for concrete and mortar.

3. Contact the mortar manufacturer you use, they also should have good information.

 

[StephenA]

When I was doing CML we used to pump 350m though 2" hoses and did not use additives, but I have seen washing up liquid used! We constructed our own triple piston pumps.

The consistency of the mix that is appled to the walls of the steel pipe was more important otherwise it just fell off.

We always paid special attention to the sand grading and shape and used a 1:1 or 1: 1.5 mix.

 

[concreteguru]

There are a number of admixtures available with classification of HRWR -High Range Water Reducers (Superplasticizers) that have NSF approved status. NSF certifies most concrete components such as cement, flyash, slag or admixtures can be used in potable water applications. NSF is a U.S. based organization. I think it stands for National Safety Foundation but I am not positive. Master Builders, WR Grace, Euclid Chemicals and Sika all produce HRWR's that have NSF certification.

Fred J. Croen, RSM
Engius, LLC
Boston, MA
www: engius.com