Verifi Concrete Quality Blog

Posts Tagged ‘superplasticizer’

Case Study: In-Transit Superplasticizer for Faster Concrete Pumping

by Verifi

Ozinga Ready Mix Concrete used Verifi® to ensure consistent slump and accelerate concrete pumping on a 9-story apartment building in downtown Chicago.

The tight space on the project site meant that the contractor, II in One Contractors, Inc. of Chicago, needed every load to arrive at the right slump, ready for concrete pumping.  This would normally be a challenge because of downtown traffic delays causing variable transit times and differences in slump loss.

Ozinga’s Quality Control department instructed Verifi software to make automatic superplasticizer additions in transit to achieve and maintain the ordered slump. This resulted in a 66% improvement in discharge slump vs. ordered slump and a 10% reduction in the time the trucks spent on site. The use of superplasticizer to change the slump ensured that critical concrete properties like setting, strength, and durability were not negatively affected.

“There were fewer delays without concrete at the pump when Verifi was used” according to Robert McGee, President of II in One Contractors.  “I would like to use Verifi on every pour.”

Read the full Lake Street Case Study here.

Superplasticizer Slump Concrete Pumping

VERIFI® DELIVERY REPORT

Load of the Week | Water & Superplasticizer in Transit

by Verifi

In today’s Load of the Week, Verifi automatically added both water and superplasticizer to reach the contractor’s desired slump.

Here’s what transpired:

1) The concrete was batched below the target initial slump of 5 inches.

2) Verifi automatically added water up to the maximum allowed for the load, then switched to superplasticizer to reach the target slump. This ensured the maximum water/cement ratio was not exceeded and the design concrete strength and durability were not compromised.

3) The target slump was changed from 5 to 8 inches. This was done at the request of the contractor. Verifi enables concrete producers to change the slump target at the request of the contractor, provided the change is within the design parameters of the mix. Note that the change was requested before the truck arrived on site. Therefore, the concrete producer could override the target slump and Verifi could adjust slump to the new target before the truck arrived on site.

4) Verifi continued to add superplasticizer to reach and maintain the new target slump of 8 inches.  All additions were automatic and did not require driver input.

5) The contractor poured the concrete shortly after arrival.

 

Concrete Superplasticizer

 [LP = leave plant, AS = arrive site, BP = begin pour, LS = leave site, RP = return plant]

Nominate a future Load of the Week by emailing the ticket number and ready mix concrete supplier name to feedback@verificoncrete.com.

Load of the Week | Automatic Superplasticizer

by Verifi

In today’s Load of the Week, Verifi adjusted the slump of the concrete by making automatic superplasticizer additions.

Verifi made three automatic superplasticizer additions to adjust the slump from 4 inches after batching to the 8-inch target. Instead of one large addition, Verifi’s unique algorithm monitored the superplasticizer performance in this particular load and precisely adjusted the three additions to reach but not exceed the target slump. Verifi used the time from batching to arrival on site to make this slump adjustment so that the concrete was ready to pour upon arrival, even though the contractor was not ready.

 

automatic superplasticizer

[LP = leave plant, AS = arrive site, BP = begin pour, LS = leave site, RP = return plant]

Nominate a future Load of the Week by emailing the ticket number and ready mix concrete supplier name to feedback@verificoncrete.com.

Load of the Week | Superplasticizer in Transit

by Verifi

In today’s Load of the Week, Verifi added superplasticizer in transit to achieve the target concrete slump. Verifi made three additions of a polycarboxylate-based superplasticizer  to increase the slump of the concrete. The use of multiple, small superplasticizer additions enables the slump to be targeted more precisely than with one large addition.

In most cases, some of the water is withheld (or “trimmed“) during batching so that it can be added after batching: at the plant, in transit or at the site. In the case of the Load of the Week, all water was added during batching and no water was available to be added by Verifi. Instead, superplasticizer was withheld at batching so that it was available to be added after batching.

 

Superplasticizer in Transit

[LP = leave plant, AS = arrive site, BP = begin pour, LS = leave site, RP = return plant]

Nominate a future Load of the Week by emailing the ticket number and ready mix concrete supplier name to feedback@verificoncrete.com.