|
.
<br /> d` .;. ,:,;Ss,
<br /> .iz,
<br /> zy -
<br /> ,�.
<br /> A ,
<br /> .. ?ii-
<br /> +.:uy*.. -
<br /> AL
<br /> noncompliance, forward the card to the District Materials Engineer in the District where the
<br /> plant is located.
<br /> Perform plastic concrete tests on the initial delivery of each concrete design mix each
<br /> day. Ensure QC technicians meeting the requirements of Section 105 are present and performing
<br /> tests throughout the placement operation . Ensure one technician is present and performing tests
<br /> throughout the placement operation at each placement site . If a placement site has multiple
<br /> concrete trucks , identify the number of technicians in the Quality Control Plan . If a placement
<br /> 11
<br /> site has multiple trucks placing concrete , then have at least two technicians present at that site .
<br /> Ensure that the equipment used for delivery, placement and finishing meets the requirements of
<br /> this Specification . Do not proceed with the placement operation until QC tests confine that the
<br /> delivered concrete complies with the plastic properties specified . When a truck designated for
<br /> QC testing arrives at the site of discharge , subsequent trucks may not discharge until QC testing
<br /> results are known . Reject non-complying loads at the jobsite . Ensure that corrections are made
<br /> on subsequent loadsAA .
<br /> Al Furnish sufficient concrete of each design mix as required by the Engineer for
<br /> verification testing. When the Engineer ' s verification test results do not compare with the QC
<br /> plastic properties test results , within the limits defined by the Independent Assurance (IA)
<br /> checklist comparison criteria, located in Materials Manual Chapter 5 , disposition of the concrete
<br /> will be at the option of the ContractorA. .
<br /> On concrete placements consisting of only one load of concrete , perform initial sampling
<br /> and testing in accordance with this Section . The acceptance sample and plastic properties tests
<br /> may be taken from the initial portion of the load. If any of the QC plastic properties tests fail,
<br /> reject the remainder of that load, terminate the LOT and notify the Engineer. Make cylinders
<br /> representing that LOT from the same sample of concrete .
<br /> Following termination of a LOT, obtain samples from a new load, and perform plastic
<br /> properties tests until such time as the water to cementitious materials ratio, air content,
<br /> temperature and slump comply with the Specification requirements . Initiate a new LOT once the
<br /> testing indicates compliance with Specification requirements .
<br /> Suspend production when three LOTS , or when any five LOTs in two days of production
<br /> of the same design mix are outside the specified tolerances . Make the necessary revisions to
<br /> concrete operations and increase the frequency of QC testing in the QCP to bring the concrete
<br /> AAA
<br /> within allowable tolerances . Obtain the Engineer ' s approval of the revisions before resuming
<br /> production . After production resumes, obtain the Engineer ' s approval before returning to the
<br /> normal frequency of QC testing.
<br /> If concrete placement stops for more than 90 minutes , perform initial plastic properties
<br /> testing on the next batch and continue the LOT . Cylinders cast for that LOT will represent the
<br /> entire LOT.
<br /> When the Department performs Independent Verification, the Contractor may perform
<br /> ILA
<br /> the same tests on the concrete at the same time . The Department will compare results based on
<br /> the Independent Assurance Checklist tolerances .
<br /> When the Department's Independent Verification test results do not meet the
<br /> I Ale,
<br /> requirements of this Section, the Engineer may require the Contractor to revise the QCP .
<br /> - 122 -
<br /> FPID (S ) : 423186 - 1 - 58 - 01
<br /> F 11J
<br /> :, s s' « .�. - r . 's r,
<br /> a 'AAA : - w
<br /> x , m "
<br /> : : tom* -3 -"^' rG ".t, r , t-, �„ • -.,. . ., .:. . .a e „ >r a r e
<br /> +�. ' 1 , . , "s,zr z ,. T ,.s .x.. 1 . i . �A,.. ,c >:'t r ..i? 'Y" fr ; .r
<br /> .Y s` ;A
<br /> : -�'i e. ..Y, n i`v ;1'm ..� : ' ..., r '� .. , . , . .. " . , - , .,
<br /> " - , .::. . '3, s ;,
<br /> $a, .' .a.a. s+ +�::.: > 'e , .. .z. "'r'•.3 . :m . : . z,r d a- ..
<br /> T , i z' . ~• tin :-
<br /> k ., r , ;f - �
<br /> �'` .,z,^'u . .,.. a , ..... �y-
<br /> � z. > ~t� .r. � t+� � .���� B � , w � �,N ; :�����' a:: ;r^r:� � � r�%=r x .. " ��+ A , :? c ._ ,. z y � ,� :_
<br />. �,� �` ,. . � H ,. . s . - � 5. ,,� . �,. ,'� ,$;,:- , . s "�x.,, t.. . ,� � ,. : w"� �, `���-�, �M� �;. �� .E� .rm �
<br /> , .-
<br />
|