Wisconsin WisDOT Standard Specifications (within FDM) — Section 710

Effective with the December 2018 Letting 525 2019 Standard Spec ifications Section 710 General Concrete QMP

710.1Description

(1)This section describes contractor QC testing requirements comm on to all concrete classes under part

7.Exceptions and additional requi rements for concrete testing are specified in:

- 715 for class I concrete used in structures and pavement. - 716 for class II and class III concret e used in ancillary applications.

710.2Small Quantities

(1)For contracts with only small quantities of material subject to testing, as defined under specific contract

QMP provisions, modify the requirements of 710 as follows:

1.The contractor may submit an abbreviated quality control pl an as allowed in 701.1.2.3 .

2.The engineer may accept aggregate based on documented previ ous testing.

710.3Certification Requirements

(1)Have a certified PCC technician I, or ACT-PCC working under a certified technician, present at the

project site, prepared and equipped to perform required samplin g and testing whenever placing concrete.

710.4Concrete Mixes

(1)The contractor is responsible for mix performance.

(2)At least 3 business days before producing concrete, provide do cumentation ensuring that materials

conform to 501 unless the engineer allows or specific QMP provisions provide otherwise. Include the following:

1.For mixes: quantities per cub ic yard expressed as SSD weigh ts and net water, water to cementitious

material ratio, and air content.

2.For cementitious materials and admixtures : type, brand, and source.

3.For aggregates: absorption, SSD bulk specific gravity, wear, soundness, freeze thaw test results if

required, and air correction fact or. Also include proposed grad ation, including P200, limits if using a combined gradation as allowed under 715.2.2.

(3)Do not use any chemical admixtures, other than air-entraining agents, water reducers, or water-

reducing retarders from the department's APL, without conforming to the following: - Obtain the engineer’s approval in advance. - Document, by independent laboratory test reports, that the ad mixture conforms to AASHTO M194.

(4)Document mix adjustments daily during concrete production.

(5)Prepare and submit modifications to a concrete mix to the engi neer for approval before using that

modified mix. Modifications requiring the engineer’s approval i nclude changes in:

1.Source of any material.

2.Quantities of cementitious materials.

3.Adjustment of fi ne to total aggregate greater than ±3 perce nt by weight.

4.Addition or deletion of admix tures. Minor admixture dosage adjustments required to m aintain air content or

slump do not require engineer review or approval.

(6)When the department requires or allows high early strength con crete, use type III cement or one of the

following: - Add at least 95 pounds but no more than 280 pounds of cement per cubic yard to a previously accepted mix along with enough water to maintain workability without rai sing the w/cm. - Substitute regular grade C for grade A or A2 high early stren gth concrete. - Substitute regular grade A for grade B high early strength co ncrete.

710.5Sampling and Testing

710.5.1 Sampling

(1)Sample fresh concrete a t the point of placement.

710.5.2 Slump

(1)Provide material conforming to the slumps specified in 501.3.7.1 . The contractor need not test slump

for concrete placed by slip-for m methods unless the engineer re quests. For other placement methods, test slump whenever an air cont ent test is performed, cylinders are made, and as the engineer directs.

Effective with the December 2018 Letting 526 2019 Standard Spec ifications 710.5.3 Air Content

(1)Provide material conforming to the air contents specified in 501.3.2.4.2. On each day of production,

test each mix design at start- up and as frequently as practicable until concrete is conforming and concrete production is under c ontrol. Subsequently, test at the QC testing frequency specified in specific contract QMP provisions and as the engineer directs.

(2)If an individual air test is outside the spec limits, notify t he engineer and test as often as practicable on

subsequent loads until the air content is conforming. 710.5.4 Concrete Temperature

(1)Measure concrete temperature o f the same sample used for air c ontent testing and report the results

along with the air content. 710.5.5 Compressive Strength

(1)Cast all 6-inch by 12-inch cyli nders in a set from the same sa mple. Do not cast mo re than one set of

cylinders from a single truckload of concrete. Mark each cylinder to identify the lot and sublot or location on the project it represents.

(2)Provide facilities for initial curing. For up to 48 hours after casting, maintain the temperature adjacent

to the specimens in the range of 60 to 80 F and prevent moisture loss. Between 24 and 48 hours after casting, transport the specimens to a department-qualified labo ratory for standard curing until testing at 28 days.

(3)Determine the 28-day compressive strength of each cylinder in psi. Test each cylinder to failure. Use a

compression machine that automatically records the date, time, rate of loading, and maximum load of each cylinder. Provide a print out of this information for each cylinder tested. 710.5.6 Aggregate Testing 710.5.6.1 General

(1)Test each stockpile for each component aggregate during aggregate production or when building

stockpiles at the conc rete production location. If aggregate wa s stockpiled before the contract, and test records from production or sto ckpiling are not available or not acceptable to the engineer, test during concrete production.

(2)For testing performed during aggregate production or stockpili ng, conform to the individual gradation

limits for the coarse and fine agg regate fractions as specified in the contractor's quality control plan. For testing performed during con crete production, conform to combined gradation limits submitted in the contractor's quality control plan. 710.5.6.2 Gradation Testing Du ring Aggregate Production or Sto ckpiling

(1)Determine the complete gradati on, including P200, using a washed analysis for both fine and coarse

aggregates. Test each stockpile for each component aggregate du ring aggregate production or stockpiling as follows: TABLE 710-1 AGGREGATE PRODUCTION AND STOCKPILING GRADATION TESTING FREQUENCY

DAILY AGGREGATE PRODUCTION MIN IMUM FREQUENCY PER STOCKPILE 1000 tons or less One test per cumulative total of 1000 tons more than 1000 tons through 2000 tons Two tests per day more than 2000 tons Three tests per day

(2)In addition to the testing perf ormed during aggregate producti on or stockpiling, determine the

combined P200 during concrete pro duction. Ensure that the combi ned P200 is 2.3 percent or less. Use a washed analysis for both fine and coarse aggregates. Rand omly, test at least once for each 50 cubic yards of concrete. For da ily production greater than 50 c ubic yards, one test per day is sufficient for constant mix conditions. The engineer may allow testing to be reduced to a minimum of once per 5 days of concrete production afte r 5 consecutive tests show that the combined P200 is less than or equal to 1.8 percent. 710.5.6.3 Gradation Testing During Concrete Production

(1)Determine the complete gradati on, including P200, using a washed analysis for both fine and coarse

aggregates. Test each stockpile for each component aggregate as follows:

Effective with the December 2018 Letting 527 2019 Standard Spec ifications TABLE 710-2 CONCRETE PRODUCTION GRADATION TESTING FREQUENCY

DAILY CONCRETE PRODUCTION MINI MUM FREQUENCY PER STOCKPILE 250 cubic yards or less One tes t per cumulative total of 250 cu bic yards more than 250 cubic yards throug h 1000 cubic yards One test per day more than 1000 cubic yards Two tests per day

(2)Report results for the 1 1/2", 1 ", 3/4", 1/2", 3/8", #4, #8, # 16, #30, #50, #100, and #200 sieves.

Effective with the December 2018 Letting 528 2019 Standard Spec ifications Section 715 QMP Concrete Pavement and Structures

715.1Description

(1)This section describes contractor mix design and testing requi rements for class I concrete used in

concrete pavement, and concrete structures. 715.1.1 Quality Control Program 715.1.1.1 General

(1)Conform to the general requirements under 701 and 710 as well as the additional specific contract

QMP provisions for class I concret e specified here in section 7 15. The department defines class I concrete as cast-n-place concrete used in pavement or structure applications where all of the following apply: - Mix design requires review by the engineer. - The contract definess pec limits for strength. - The contractor may earn statis tically based incentives for superior concrete strength. [1] [1] HES and SHES concrete are not eligible for 28-day strength inc entives. 715.1.1.2 Small Quantities

(1)The department defines small quant ities of class I concrete, s ubject to the reduced requirements

under 710.2 , as follows: - Less than 150 cubic yards of structure concrete placed under a single bid item. - Less than 2500 cubic yards of s lip-formed pavement placed using a single mix design. - Less than 1000 cubic yards of non-slip-formed pavement placed using a single mix design. 715.1.1.3 Pre-Pour Meetings for Structure Concrete

(1)Arrange at least two pre-pour mee tings to discuss concrete pla cement. Discuss the placement

schedule, personnel r oles and responsibilit ies, testing and qua lity control, and how test results will be communicated. Schedule the first m eeting before placing any con crete and the second before placing any bridge deck concrete. Ensure that representatives from all parties involved with concrete work, including contractor, sub-contr actor, ready-mix supplier, teste rs, and the project manager, attend these meetings. 715.1.1.4 Quality Control Plan

(1)If a comprehensive quality c ontrol plan is required under 701.1.2.2 , submit a plan conforming to

701.1.2.2 and include additional concrete mix information as follows:

1.Preliminary concrete mix inf ormation including proposed pro duction facilities and sources of materials as

well as the name, title, and phone number of the person developing the mix design.

2.Proposed individual and combined aggregate gradation limits .

3.Proposed methods for monitori ng and recording batch weights .

715.2Materials

715.2.1 General

(1)Determine mixes for class I con crete used under the contract u sing one or more of the following

methods: - Have a HTCP-certified PCC te chnician II develop new concrete mixes qualified based on the results of mix development tests performed by a d epartment-qualified laborator y. - Submit previously-used depar tment-approved mixes qualified ba sed on field performance.

(2)The contractor need not provide separate laboratory mix designs for high early strength concrete nor

provide routine 28-day compressi ve strength tests during placement for high early strength concrete.

(3)For lab-qualified or field-qualified mixes, in addition to the mix information required under 710.4 ,

submit 2 copies of a concrete mix report at least 3 business da ys before producing concrete. For lab- qualified mixes, include strength data, test dates, and the nam e and location of the laboratory that performed mix development testing . For field-qualified mixes, i nclude historical dat a that demonstrate acceptable strength and field performance.

(4)Ensure that the concrete mix report includes a cover sheet wit h signature blocks for both the mix

developer and the engineer. Have the mix developer sign and dat e each copy attesting that all information in the report is accurate. The engineer will sign a nd date each copy of the report. The engineer’s signature verifies t hat the engineer had the opportu nity to review the mix report, to check that it meets the concrete mix r equirements, and to comment. Th e engineer will return a signed copy to the contractor within 3 busine ss days of receiving the repor t.

Source: Wisconsin Standard Specifications for Highway and Structure Construction, 2019 Edition. Pages 534–536 of 601.

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701 General QMP Requirements

715 QMP Concrete Pavement and Structures