601 - PCC Pavement Mixtures - Revision history

JohnsonN23: /* Nonexposed Concrete */ relink

2017-02-14T13:05:13Z

Nonexposed Concrete: relink

JohnsonN23: /* Exposed Concrete */ relink

2017-02-14T13:04:05Z

Exposed Concrete: relink

JohnsonN23: /* NRMCA Plant Certification */ relink

2017-02-14T13:02:13Z

NRMCA Plant Certification: relink

Greenes2: /* Inspection and Control on Small Quantities of Concrete */

2015-05-08T15:16:04Z

Inspection and Control on Small Quantities of Concrete

Greenes2: /* Exposed Concrete */

2015-05-08T15:12:45Z

Exposed Concrete

Greenes2: /* Exposed Concrete */

2015-05-08T15:11:44Z

Exposed Concrete

Greenes2: /* Plant Visits */

2015-05-08T15:10:31Z

Plant Visits

Greenes2: /* Beam Scale Control Systems Checkout */

2015-05-08T15:10:11Z

Beam Scale Control Systems Checkout

Greenes2: /* Dial Scale Control Systems Checkout */

2015-05-08T15:08:59Z

Dial Scale Control Systems Checkout

Greenes2: /* Automatic Control Checkout Procedure for Concrete Plants */

2015-05-08T15:08:38Z

Automatic Control Checkout Procedure for Concrete Plants

← Older revision		Revision as of 13:05, 14 February 2017
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	Substructure concrete above the subfooting and water main encasement are not to be considered in this category but must have complete reporting and inspection.		Substructure concrete above the subfooting and water main encasement are not to be considered in this category but must have complete reporting and inspection.

−	Documentation: [http://~~mdotcf~~.state.mi.us~~/public~~/webforms/~~public/~~1174.pdf Form 1174] will not be required, but pay quantities will be reported on Form 1174A and the Inspector’s Daily Report, [http://~~mdotcf~~.state.mi.us~~/public~~/webforms/~~public/1122A~~.pdf Form 1122]. Cylinders/beams, when made, should be reported on Concrete Cylinder/Core Compression Test Results, Form 1160B ([http://hct591jbosds790/wiki/index.php/File:602.02-2.jpg '''''Figure 602-2''''']) if cylinders were cast and submitted after strength determination was completed or Report of Modulus of Rupture, [http://~~mdotcf~~.state.mi.us~~/public~~/webforms/~~public/~~1160A.pdf Form 1160A] ([http://hct591jbosds790/wiki/index.php/File:602.02-3.jpg '''''Figure 602-3''''']). Concrete delivery tickets are to state the cement content per cubic yard.	+	Documentation: [http://mdotjboss.state.mi.us/webforms/GetDocument.htm?fileName=1174.pdf Form 1174] will not be required, but pay quantities will be reported on Form 1174A and the Inspector’s Daily Report, [http://mdotjboss.state.mi.us/webforms/GetDocument.htm?fileName=1122.pdf Form 1122]. Cylinders/beams, when made, should be reported on Concrete Cylinder/Core Compression Test Results, Form 1160B ([http://hct591jbosds790/wiki/index.php/File:602.02-2.jpg '''''Figure 602-2''''']) if cylinders were cast and submitted after strength determination was completed or Report of Modulus of Rupture, [http://mdotjboss.state.mi.us/webforms/GetDocument.htm?fileName=1160A.pdf Form 1160A] ([http://hct591jbosds790/wiki/index.php/File:602.02-3.jpg '''''Figure 602-3''''']). Concrete delivery tickets are to state the cement content per cubic yard.

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 * Sign and light standard foundations.
-Batch weights will be set up from an approved mix design.  The concrete delivery tickets will contain the same information required for production projects, including certification that the materials used in the concrete are State tested or certified as meeting specification requirements.  A NRMCA certified plant should be used the Standard Specifications for Construction using [http://mdotcf.state.mi.us/public/webforms/public/0580.pdf Form 580] ([[604.03 - Quality Control Plan|'''''Figure 604-1''''']]).
+Batch weights will be set up from an approved mix design.  The concrete delivery tickets will contain the same information required for production projects, including certification that the materials used in the concrete are State tested or certified as meeting specification requirements.  A NRMCA certified plant should be used the Standard Specifications for Construction using [http://mdotjboss.state.mi.us/webforms/GetDocument.htm?fileName=0580.pdf Form 580] ([[604.03 - Quality Control Plan|'''''Figure 604-1''''']]).
 Yield checks are optional, as overruns may be expected with small pours, and they may not provide correlative information.
-Documentation - The individual pours may be summarized on Inspector’s Report of Concrete Placed, [http://mdotcf.state.mi.us/public/webforms/public/1174.pdf Form 1174A] ([http://hct591jbosds790/wiki/index.php/File:601.07-1.jpg '''''Figure 601-6''''']) and submitted weekly, or more frequently, as judgment dictates.  The report is intended to be a source document and history which will provide information on slump, air, etc. in the event the pour should develop some deficiency.  Form 1174A should have the wording “Random Plant Inspection” printed in a prominent place to indicate that a continuous plant inspection was not observed.  Any pay quantities should be reported on Inspector’s Daily Report, [http://mdotcf.state.mi.us/public/webforms/public/1122B.pdf Form 1122B] ([http://hct591jbosds790/wiki/index.php/File:601.07-2.jpg '''''Figure 601-7''''']).
+Documentation - The individual pours may be summarized on Inspector’s Report of Concrete Placed, [http://mdotjboss.state.mi.us/webforms/GetDocument.htm?fileName=1174A.pdf Form 1174A] ([http://hct591jbosds790/wiki/index.php/File:601.07-1.jpg '''''Figure 601-6''''']) and submitted weekly, or more frequently, as judgment dictates.  The report is intended to be a source document and history which will provide information on slump, air, etc. in the event the pour should develop some deficiency.  Form 1174A should have the wording “Random Plant Inspection” printed in a prominent place to indicate that a continuous plant inspection was not observed.  Any pay quantities should be reported on Inspector’s Daily Report, [http://mdotjboss.state.mi.us/webforms/GetDocument.htm?fileName=1122B.pdf Form 1122B] ([http://hct591jbosds790/wiki/index.php/File:601.07-2.jpg '''''Figure 601-7''''']).
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 If a NRMCA, or a certified or approved automated plant is not available, then a waiver of automation will be permitted and a manual plant may be used with the Engineer’s approval.
-Every plant, regardless of certification or approval status, must have a current scale check report on file.  The five page Concrete Plant Equipment Inspection Report, [http://mdotcf.state.mi.us/public/webforms/public/0580.pdf Form 580] (Figure 601-1) should be on file at the TSC (with corrections documented for any deficiencies noted) for plants receiving waiver of NRMCA certification.  NRMCA certified plants must display their current Certificate of Conformance on-site, and furnish the Department with a photocopy to be on file at the TSC.
+Every plant, regardless of certification or approval status, must have a current scale check report on file.  The five page Concrete Plant Equipment Inspection Report, [http://mdotjboss.state.mi.us/webforms/GetDocument.htm?fileName=0580.pdf Form 580] (Figure 601-1) should be on file at the TSC (with corrections documented for any deficiencies noted) for plants receiving waiver of NRMCA certification.  NRMCA certified plants must display their current Certificate of Conformance on-site, and furnish the Department with a photocopy to be on file at the TSC.
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-===[[#Inspection and Control on Small Quantities of Concrete|Inspection and Control on Small Quantities of Concrete]]===
+===[[#Exposed Concrete|Exposed Concrete]]===
 The following items may be accepted on the basis of conventional field testing (slump, air and strength) and only intermittent plant observation will be required, as deemed necessary by the Engineer:
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-====[[#Nonexposed Concrete|Nonexposed Concrete]]====
+===[[#Nonexposed Concrete|Nonexposed Concrete]]===
 Concrete without plant inspection and with limited field testing, as approved by the Engineer, may be used with the following concrete items:

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 * Sign and light standard foundations.
-Batch weights will be set up from an approved mix design.  The concrete delivery tickets will contain the same information required for production projects, including certification that the materials used in the concrete are State tested or certified as meeting specification requirements.  A NRMCA certified plant should be used.  the Standard Specifications for Construction using [http://mdotcf.state.mi.us/public/webforms/public/0580.pdf Form 580] ([[604.03 - Quality Control Plan|'''''Figure 604-1''''']]).
+Batch weights will be set up from an approved mix design.  The concrete delivery tickets will contain the same information required for production projects, including certification that the materials used in the concrete are State tested or certified as meeting specification requirements.  A NRMCA certified plant should be used the Standard Specifications for Construction using [http://mdotcf.state.mi.us/public/webforms/public/0580.pdf Form 580] ([[604.03 - Quality Control Plan|'''''Figure 604-1''''']]).
 Yield checks are optional, as overruns may be expected with small pours, and they may not provide correlative information.

← Older revision		Revision as of 15:10, 8 May 2015
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	Every plant, regardless of certification or approval status, must have a current scale check report on file. The five page Concrete Plant Equipment Inspection Report, [http://mdotcf.state.mi.us/public/webforms/public/0580.pdf Form 580] (Figure 601-1) should be on file at the TSC (with corrections documented for any deficiencies noted) for plants receiving waiver of NRMCA certification. NRMCA certified plants must display their current Certificate of Conformance on-site, and furnish the Department with a photocopy to be on file at the TSC.		Every plant, regardless of certification or approval status, must have a current scale check report on file. The five page Concrete Plant Equipment Inspection Report, [http://mdotcf.state.mi.us/public/webforms/public/0580.pdf Form 580] (Figure 601-1) should be on file at the TSC (with corrections documented for any deficiencies noted) for plants receiving waiver of NRMCA certification. NRMCA certified plants must display their current Certificate of Conformance on-site, and furnish the Department with a photocopy to be on file at the TSC.
−
−	~~{{top}}~~
−
−	~~====[[#Plant Visits\|Plant Visits]]====~~
−
−	The material being weighed shall agree with the batch weights specified, within the tolerance permitted. Tape or other marks may be used on the dial face to aid in visually determining the required batch weights.
−
−	~~The transparent calibrated column or sight tube used for admixtures shall be in view of the plant operator and discharging properly with each batch.~~
−
−	Familiarity with the entire plant operation will help to determine if the material is coming from proper bins, batch sizes are correct for mixer or truck capacity and that the required admixtures are being dispensed.

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← Older revision		Revision as of 15:08, 8 May 2015
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	Every plant, regardless of certification or approval status, must have a current scale check report on file. The five page Concrete Plant Equipment Inspection Report, [http://mdotcf.state.mi.us/public/webforms/public/0580.pdf Form 580] (Figure 601-1) should be on file at the TSC (with corrections documented for any deficiencies noted) for plants receiving waiver of NRMCA certification. NRMCA certified plants must display their current Certificate of Conformance on-site, and furnish the Department with a photocopy to be on file at the TSC.		Every plant, regardless of certification or approval status, must have a current scale check report on file. The five page Concrete Plant Equipment Inspection Report, [http://mdotcf.state.mi.us/public/webforms/public/0580.pdf Form 580] (Figure 601-1) should be on file at the TSC (with corrections documented for any deficiencies noted) for plants receiving waiver of NRMCA certification. NRMCA certified plants must display their current Certificate of Conformance on-site, and furnish the Department with a photocopy to be on file at the TSC.
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−	~~{{top}}~~
−
−	~~====[[#Dial Scale Control Systems Checkout\|Dial Scale Control Systems Checkout]]====~~
−
−	~~Stop the automatic controls for the cement scale or aggregate scale in the underweight check position.~~
−
−	~~The scale is then pulled upscale to the desired target weight reading.~~
−
−	~~At this point, the underweight indicator light should be off. If the indicator light stays on, the controls should be adjusted before proceeding.~~
−
−	~~From the target weight, slowly drop the scale reading until the underweight indicator light goes on.~~
−
−	~~The scale reading is then noted and entered on the automatic control checkout sheet.~~
−
−	~~The difference between the target weight and the scale reading when the indicator light goes on is the actual underweight tolerance.~~
−
−	Overweight tolerances are checked in a similar way. The controls are stepped to the overweight position and the scale is pulled upscale until the overweight indicator comes on. The difference between the target weight and the scale reading is the actual overweight tolerance.
−
−	Note that, in each case, the reading is taken by beginning at the target weight and proceeding in the direction of the tolerance being checked. The readings should not be taken by pulling the dial indicator toward the target weight. Some equipment may give a different reading going in this direction. The result will be misleading and the actual tolerance may be greater than the reading obtained.
−
−	When checking aggregate scales, the same procedure is repeated for each material. The same tolerance reading will not necessarily be found for each material though there is often only one tolerance control setting for underweight and one for overweight.
−
−	It is important to verify that substantially all the materials weighed are discharged from the weigh hopper. This condition is verified by pulling the scale indicator downscale to a nearly empty position until the ''hopper empty'' indicator goes on. The scale reading when the indicator goes on is: ''hopper empty'' or ''zero tolerance''. These tolerances are 1 percent of the batch weights, or 100 pounds (45 kg), whichever is less.
−
−	~~These tests may generally be run with materials in the hoppers and, on some equipment, this may be the easiest method.~~

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