Has anyone heard of Glenium,Ridi mix sent out to me. It is soppose to help when your having trouble pumping liteweight concrete. I have never heard of it. So I would not put in mix or my pump.Now you going to ask why i have trouble pumping liteweight concrete. They do not soak there rocks up here. So you start at a 7 inch slump come out 2 or 3.I hope that help. If you have heard of it, is it safe.

Thanks Scott

RUCK

 IT IS USED ALL THE TIME HERE, YOUR FINE.

ADMIXTURES FOR CONCRETE & SHOTCRETE

GLENIUM SERIES

New generation of superplasticiser for premixed and precast concrete.

Glenium 51 has been primarily developed for applications in the premixed and precast concrete industries where the highest durability and performance is required.

Glenium 51 is free from chlorides and complies with AS1478 Type HWR and ASTM C-494 Types A and F.

Conventional superplasticisers, such as those based on sulphonated melamine and naphthalene formaldehyde condensates, at the time of mixing, become absorbed onto the surface of the cement particles. This absorption takes place at a very early stage in the hydration process. The sulphonic groups of the polymer chains increase the negative charge on the surface of the cement particle and dispersion of the cement occurs by electrostatic repulsion.

Glenium 51 is differentiated from conventional superplasticisers in that it is based on a unique carboxylic ether polymer with long lateral chains. This greatly improves cement dispersion. At the start of the mixing process the same electrostatic dispersion occurs as described previously but the presence of the lateral chains, linked to the polymer backbone, generate a steric hindrance which stabilises the cement particles capacity to separate and disperse.

This mechanism provides flowable concrete with greatly reduced water demand.

3

  The supplier must soak the material in order to solve this problem.Another "engineering marvel" to cut construction costs.............

Scott,

Non pre-soaked liteweight is, as you know, pumpable. You flood the mix with water and as you are pumping the water is driven into the agg' by the pressure of the pump. When you "fool" the cement into acting as if the extra mixwater is present by adding super-p you are treading on dangerous ground. If it is a boom pour you are usually allright. If there is much system involved you are increasing your chance of failure and problems. If, for example the sand has a higher water content than is calculated by the plant the effective yeild of sand is decreased. This along with the unsoaked agg' and the absence of 'real' mix water will increase your pump pressure which in turn drives more moisture into the agg'. It is an evil series of events.

Find out what your max alowable slump is and then make them take the sample at the discharge end of the hose; not out of the chute of the ready mix truck. The spec says "Point of Placement".

Get all of the alowable mix water in the mud. Ask someone that really knows the mechanics of when and how the super p acts when it 'times out'. Dont get caught holding the bag, as it were. You can not make any money with your boom pipe all over the yard. They need to be hollow, and on your boom.

Be careful, nobody cares about you as much as you.

Hey Bob;

That is pretty funny, take the sample from the end of the hose.  In nearly 20 years around concrete I have seen only 1 test done from the end of the hose and that was because it was closer to were the tester parked. 

They say the end of the truck but the way I read the book, it is were the product hits the job, the end of the hose. 10ft or 500ft of hose, that is the true test

Newby

We have made that happen; especially on long-push lightweight jobs. If you do not ask, you will never receive. You can make it happen.

Bob and OE-3 Thank You for your help.Pouring 100 yards of liteweight in the morning, I will let you know how it goes. Boom and a 140 feet of 4 inch, should be a great day. LOL

Again Thank you guys

Scott