What about the claim that a UHPC essence, local cement and local sand can be used to produce UHPC concrete?

Again and again we read in flyers from UHPC manufacturers that they have a UHPC essence with
which the customer can easily mix a local cement and local sand with this UHPC essence and water and then the customer gets a UHPC concrete. As a rule, this text is very general and does not go into technical details, which has its reasons.

Let's start with the statement:
...locally available cement and sand can be used....

In itself, this statement is not wrong, if we disregard what the customer expects from the quality.
Why?
Well, if we buy a C25 cement, it is impossible to produce a C100 UHPC concrete with a UHPC essence.
If we want to produce a high quality UHPC concrete we need high quality cement, this cannot be changed.
Many users believe that cement from manufacturer A is exactly the same as from manufacturer B if only it says C35.
This is also partly a misconception. Yes, it is true that with both you will get a strength of 35 MPa. But if you look at the anlaysis of the two cements, they could be very different. However, these differences determine the suitability for a UHPC and how it can be processed.
The same applies to aggregates such as sand. Of course I can add local sand but a high quality binder will only be a high quality UHPC if the right sand with the right grading curve is added, otherwise there is a possibility that you will only get a good concrete.

You can of course test the local sand and cement for suitability. Such a test takes one day if the analysis data of the cement and sand are available. We do this cost free for our customers.

 

WPE DK International

Phone: 0049 176 601 73146
E-mail: info@wpe-dk.dk
Homepage: www.wpe-dk.com

New mobile production plant for HPC and UHPC binder systems

In addition to our stationary production plant, we are planning to put a mobile HPC and UHPC production
plant for the production of HPC or UHPC binders into operation from the beginning of July. The production plant is housed in three 40" containers and is intended as an expandable modular system. In its basic configuration, the module will produce 120 t / day of binder material. A single packaging unit is integrated into the container for packaging in 1 to BigBag or in 25 kg paper bags. We also plan to commission a mobile HPC and UHPC mixing line one month later. For the basic equipment, a 40" container is required.
The mixing plant can produce approx. 60 t / day of HPC or UHPC ready-mixed concrete. In the basic version, the raw materials are processed "just in time" into binder or HPC / UHPC concrete. In case of a larger daily demand, the raw materials are stored in silos to supply the production modules with raw material

The production and mixing modules can then be used on any construction site in the world.
We will also sell these module systems. They will then be customised to the needs of the customer.
For local HPC or UHPC production, we also offer licences for our HPC and UHPC mixing recipes to our customers.

 

 

 

 

 

WPE DK International

Phone: 0049 176 601 73146
E-mail: info@wpe-dk.dk
Homepage: www.wpe-dk.com