ASTM C387 Packaged, Dry, Combined Materials for Concrete and Mortar

[qualitychow22]

Hi Forum,

I am dealing with a supplier that will be providing a dry packaged mix and should be upholding the standard on the subject. The ASTM specifies testing for each batch (6 cylinders; 3-7days, 3-28 days); however they do not provide this data for us. For quality control, per contract requirement, we do have to make cylinders ourselves for compressive strength testing; however I see this ASTM testing for "prevention" measures (Testing before customers receives final product). The cylinders we make ourselves is seen as "detection" measures to ensure after concrete is produced that it meets strength specifications.

Has anyone dealt with this ASTM before?

Let me know your thoughts.

Thanks,

 

[concretemasonry]

qualitychow -

Is this bagged product something that is unique to a certain project?

Apparently you accepted a contract with you customer that put an extra level of testing into the product chain of events. - A preventative extra measure of the final product performance. If it is not a unique product you should be able to get a typical test report as a part of the "baggers" quality control based on the frequency, keeping in mind the bagged products are often stored in inventory based on the demands.

The bagger will also get test reports on the cement provided, but that is only a mill report for the cement that COULD have been used by the bagger for your product. - The same also goes for the aggregates, all of which are handled and inventoried in several ways and sold to many companies.

Dick



Engineer and international traveler interested in construction techniques, problems and proper design.

 

[qualitychow22]

They have test reports of raw materials included within the mix design, but it is unknown from their quality plan (they are not sharing this) how often they get them from their suppliers and how frequency they need to be tested.

I would also worry why there are no statistical analysis of breaks because that they will indicate the capability of their operations and how well they control their process. You cannot consistently meet customer requirements and specifications without any data to back it up.