Concrete Mix Design Project:_________________________________

Checked by:________________ Date: _____________

Submission requirements.

Note that all mix designs should be submitted by the contractor. The City may provide courtesy pre-approvals of mix designs submitted by concrete suppliers, but in all cases, the contractor must submit the mix designs he plans to use for approval.	Water/Cement ratio.

Design slump.

Design strength.

Batch proportions all components per CY.

Design unit weight

Gradations of all aggregates. This is to be a sieve analysis, not a specification.

List of all admixtures.

Manufacturer’s data sheets for all components including recommended application rates and safety sheets.

A mix design designation which will be printed on delivery tickets.

Narrative regarding admixtures not covered by spec. When added, how much, by whom, etc.
Aggregate tests	All crushed stone shall be entirely granite, calcite cemented sandstone, quartzite, basalt, diabase, rhyolite, or trap rock.

ASTM 1260 must be run on combination of coarse and fine aggregates proportioned as proposed in the mix design.

Other quality tests run by AshGrove/Terracon for OP and included in the “Durable Concrete Report” on a variety of aggregate sources may be accepted in lieu of independent tests run for the contractor/supplier.
Provide to the project inspector	A copy of the mix design for each mix proposed for the project.

Copies of the MSDS sheets for concrete components.
Strength test data	Submitted with mix design. In the event that testing cannot be completed prior to concrete use, test results may be submitted upon completion within a reasonable timeframe.
Water reducers	May be used to increase slump, but must be submitted as a part of the mix design. If a high-range water reducer is to be added in the field, slump must be measured prior to its addition.

The mix design should specify slump before and after addition of water reducer (where it is added in the field).

Date

Contractor

Concrete mix designs for _______________ (project)

I have reviewed the following mix design(s), and find them satisfactory for use on _____________________ (project) with the following stipulations:

Concrete delivery tickets must at a minimum contain the following information:

Name and location of plant

Size of load in CY.

Batch weights of components

Time of batching and rev. counter reading (or reset prior to batching) at plant

Amount of water withheld (if any).

Mix design designation – this must agree with the approved mix design for each project.

Any water added in the field will be added using a bucket calibrated by volume for that purpose.

In the event that the City representative is unable to collect any of the concrete delivery tickets, the contractor will collect them and provide them to the City upon request. Failure to do so is grounds for rejection of the work.

Slump, air and yield will be tested and approved prior to the first placement of the day, and at intervals throughout the day. Failure to maintain slump, air or yield within KDOT specifications, project specifications, or approved mix design specifications is grounds for rejection of the concrete, and of the work.

Project Manager

cc: Project Inspector

Project file

Concrete Mix Design

Michael S. Ross

1999-12-30

Joe Archer

City of Overland Park