1995 METRIC CSJ SPECIAL SPECIFICATION ITEM 3014 QUALITY CONTROL/QUALITY ASSURANCE OF ASPHALT BINDERS FOR BITUMINOUS MIXTURES

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1 1995 METRIC CSJ SPECIAL SPECIFICATION ITEM 3014 QUALITY CONTROL/QUALITY ASSURANCE OF ASPHALT BINDERS FOR BITUMINOUS MIXTURES 1. DESCRIPTION. THIS ITEM SHALL GOVERN FOR QUALITY CONTROL AND QUALITY ASSURANCE OF ASPHALT BINDERS USED IN THE CONSTRUCTION OF BITUMINOUS MIXTURES WHERE THE BITUMINOUS MIXTURE CONSISTS OF A COMPACTED MIXTURE OF AGGREGATE AND ASPHALT MATERIAL MIXED IN A MIXING PLANT. IT IS THE INTENT OF THIS SPECIFICATION THAT THE CONTRACTOR BE RESPONSIBLE FOR ALL QUALITY CONTROL AND QUALITY ASSURANCE OF THE ASPHALT BINDER, INCLUDING ASPHALT BINDER DESIGN, WHERE APPLICABLE, AND TESTING WITH CERTIFIED SPECIALISTS. TXDOT WILL BE RESPONSIBLE FOR VERIFICATION TESTING AND ANY REQUIRED REFEREE TESTING. 2. DEFINITIONS. THE FOLLOWING DEFINITIONS SHALL BE USED IN THE CONTEXT OF THIS SPECIFICATION. PERFORMANCE GRADED (PG) BINDER - A BINDER WHICH MEETS THE REQUIREMENTS OF ONE OF THE PERFORMANCE GRADES DESCRIBED IN AASHTO MP1. MODIFIER - A MODIFIER IS ANY MATERIAL WHICH IS ADDED TO AN ASPHALT BINDER WITH THE INTENT OF ALTERING THE RHEOLOGICAL PROPERTIES OF THE MATERIAL, AND OF CHANGING THE GRADE OF THE ASPHALT. SBR RUBBER LATEX IS AN EXAMPLE OF A MODIFIER. ADDITIVE - AN ADDITIVE IS A MATERIAL WHICH IS ADDED TO AN ASPHALT BINDER WITH THE INTENT OF PROMOTING SPECIFIC PROPERTIES OTHER THAN THE RHEOLOGICAL PROPERTIES OF THE BINDER. ANTISTRIP AGENT IS AN EXAMPLE OF AN ADDITIVE. BINDER LOTS AND SUBLOTS - BINDER LOTS AND SUBLOTS ARE DEFINED ON THE BASIS OF THE AMOUNT OF BITUMINOUS MIXTURE PRODUCED WITH THE BINDER AND ARE DESIGNATED ACCORDING TO THE DEFINITIONS OF BITUMINOUS MIXTURE LOTS AND SUBLOTS, AS FOLLOWS: (1) IF A QC/QA SPECIFICATION IS USED FOR PRODUCTION OF THE BITUMINOUS MIXTURE, THE VOLUME OF ASPHALT BINDER CONSUMED IN PRODUCTION OF THE LOTS AND SUBLOTS FOR THE BITUMINOUS MIXTURE SHALL CONSTITUTE BINDER LOTS AND SUBLOTS. (2) IF A QC/QA SPECIFICATION IS NOT USED FOR THE PRODUCTION OF THE BITUMINOUS MIXTURE, THE VOLUME OF BINDER CONSUMED IN BITUMINOUS MIXTURE PRODUCTION LOTS AND SUBLOTS AS DEFINED BELOW, SHALL CONSTITUTE BINDER LOTS AND SUBLOTS. BITUMINOUS MIXTURE PRODUCTION LOT. A "BITUMINOUS MIXTURE PRODUCTION LOT" SHALL CONSIST OF FOUR (4) EQUAL SUBLOTS OF NOT LESS THAN 225 MEGAGRAMS NOR MORE THAN 675 MEGAGRAMS. WHEN THE MEASUREMENT IS BY THE VOLUMETRIC METHOD, THE SUBLOT SIZE SHALL

2 NOT BE LESS THAN 150 CUBIC METERS NOR MORE THAN 380 CUBIC METERS. SUBLOT SIZES IN EXCESS OF 450 MEGAGRAMS OR 260 CUBIC METERS SHALL ONLY BE ALLOWED WHEN ANTICIPATED DAILY PRODUCTION EXCEEDS 1800 MEGAGRAMS OR 1000 CUBIC METERS. THE CONTRACTOR SHALL SELECT ONE (1) OF THE TWO (2) OPTIONS DESCRIBED HEREIN TO FURTHER DEFINE A "BITUMINOUS MIXTURE PRODUCTION LOT" FOR EACH PROJECT. THE SELECTION OF THE OPTIONS LISTED SHALL BE IN WRITING AND SHALL BE DETERMINED AT THE PRE- CONSTRUCTION CONFERENCE. ONCE AN OPTION HAS BEEN SELECTED FOR A PROJECT, THE CONTRACTOR CAN CHANGE THE SELECTED OPTION ONE TIME DURING THE COURSE OF THE PROJECT BY NOTIFYING THE ENGINEER IN WRITING. (A) BITUMINOUS MIXTURE PRODUCTION LOT OPTION NO. 1. WHEN THIS OPTION IS SELECTED, A "BITUMINOUS MIXTURE PRODUCTION LOT" SHALL CONSIST OF THE PRODUCTION OF ONE (1) DAY OF BITUMINOUS MIXTURE AND SHALL BE COMPOSED OF FOUR (4) SUBLOTS. IT IS THE INTENT THAT THIS SAMPLING PLAN SHALL PRODUCE A SAMPLE FROM EACH OF FOUR (4) SUBLOTS FOR ANY DAY'S PRODUCTION. ONCE A SUBLOT SIZE HAS BEEN SELECTED FOR THE DAY, THE SUBLOT SIZE CANNOT BE VARIED UNTIL THE NEXT DAY'S PRODUCTION. IF DUE TO EQUIPMENT PROBLEMS, WEATHER CONDITIONS OR OTHER UNANTICIPATED CIRCUMSTANCES, FOUR (4) SUBLOT SAMPLES ARE NOT OBTAINED FROM A LOT, THE BINDER LOT SHALL CONSIST OF ONLY THOSE SUBLOTS SAMPLED ACCORDING TO THE PRE-DEFINED PLAN. (B) BITUMINOUS MIXTURE PRODUCTION LOT OPTION NO. 2. WHEN THIS OPTION IS SELECTED, A "BITUMINOUS MIXTURE PRODUCTION LOT" SHALL CONSIST OF FOUR (4) SUBLOTS AS DEFINED IN SUBARTICLE 2.(2). IF THE DAY'S PRODUCTION DOES NOT PRODUCE FOUR (4) SUBLOTS, THEN ADDITIONAL SUBLOTS FROM THE NEXT DAY'S PRODUCTION SHALL BE USED TO COMPOSE FOUR (4) SUBLOTS AND A PAY ADJUSTMENT FACTOR WILL BE DETERMINED BASED ON THESE FOUR (4) SUBLOTS. WHEN NECESSARY, ADDITIONAL SUBLOTS SHALL BE CARRIED FORWARD AND COMBINED WITH THE NEXT DAY'S PRODUCTION TO COMPOSE THE REQUIRED FOUR (4) SUBLOTS PER LOT. THE CONTRACTOR MAY SELECT A DIFFERENT SUBLOT SIZE FOR EACH LOT BASED UPON THE ANTICIPATED PRODUCTION. HOWEVER, ONCE A SUBLOT SIZE HAS BEEN SELECTED FOR A LOT, THE SUBLOT SIZE CANNOT BE VARIED UNTIL THE NEXT LOT'S PRODUCTION. (3) IT IS THE INTENT OF THE DEFINITIONS TO PRODUCE FOUR (4) SUBLOT SAMPLES PER LOT, WITH THE FOLLOWING EXCEPTIONS: (A) A BINDER LOT SHALL INCLUDE ONLY ONE PERFORMANCE GRADE BINDER. THUS IF THE PG BINDER IS CHANGED WITHIN A PRODUCTION DAY, THAT DAY WILL BE DIVIDED INTO TWO LOTS REPRESENTING EACH PERFORMANCE GRADE USED AND EACH LOT MAY BE REPRESENTED BY LESS THAN FOUR (4) SUBLOTS. (B) AT THE END OF THE PROJECT, THE FINAL BINDER LOT MAY INCLUDE LESS THAN FOUR (4) SUBLOTS. (C) DUE TO EQUIPMENT PROBLEMS, WEATHER CONDITIONS OR OTHER UNANTICIPATED CIRCUMSTANCES A BINDER LOT MAY INCLUDE LESS THAN FOUR (4) SUBLOTS ACCORDING TO SUBARTICLE 2.(2)(A) BITUMINOUS MIXTURE PRODUCTION LOT OPTION NO

3 (D) FOR SMALL QUANTITIES OF BITUMINOUS MIXTURE ((90 to 450 MEGAGRAMS OR 50 TO 250 CUBIC METERS) PER DAY ANTICIPATED PRODUCTION), THE CONTRACTOR SHALL OBTAIN A SINGLE RANDOM SAMPLE TO REPRESENT THE ENTIRE LOT. (E) FOR VERY SMALL PRODUCTION QUANTITIES (LESS THAN 90 MEGAGRAMS OR 50 CUBIC METERS PER DAY) THE CONTRACTOR WILL NOT BE REQUIRED TO PERFORM ANY BINDER TESTING AND THE BINDER PAY ADJUSTMENT FACTOR SHALL BE QUALITY CONTROL TESTS - THOSE TESTS PERFORMED AT THE OPTION OF THE CONTRACTOR TO CONTROL OPERATIONS. QUALITY ASSURANCE TESTS - THOSE TESTS REQUIRED BY THIS SPECIFICATION TO BE PERFORMED BY THE CONTRACTOR AND USED TO DETERMINE SPECIFICATION COMPLIANCE AND PAY ADJUSTMENT FACTORS. VERIFICATION TESTS - THOSE TESTS REQUIRED BY THIS SPECIFICATION TO BE PERFORMED BY THE ENGINEER TO VERIFY THE ACCURACY OF THE CONTRACTOR'S TEST RESULTS. REFEREE TESTS - THOSE TESTS PERFORMED BY TXDOT, MATERIALS AND TESTS DIVISION TO RESOLVE DIFFERENCES BETWEEN CONTRACTOR AND THE ENGINEER'S TEST RESULTS. 3. CERTIFICATION OF TESTING PERSONNEL. ALL TESTING (CONTRACTOR AND TXDOT) WILL BE CONDUCTED BY PERSONNEL APPROVED BY THE TXDOT MATERIALS AND TESTS DIVISION AND IN ACCORDANCE WITH THE CERTIFICATION REQUIREMENTS IN ATTACHMENT 1. THE CONTRACTOR SHALL PROVIDE A LIST OF CERTIFIED PERSONNEL, AND COPIES OF THEIR CERTIFICATIONS, TO BE USED ON THE PROJECT PRIOR TO BEGINNING OF PRODUCTION. AN UPDATED LIST SHALL BE PROVIDED WHEN PERSONNEL CHANGES ARE MADE. 4. ASPHALT BINDER. ASPHALT MATERIAL FOR THE BITUMINOUS MIXTURE SHALL BE OF THE GRADE SHOWN ON THE PLANS OR DESIGNATED BY THE ENGINEER AND SHALL MEET THE REQUIREMENTS OF AASHTO MP1, "STANDARD SPECIFICATION FOR PERFORMANCE GRADED ASPHALT BINDERS". 5. EQUIPMENT. (1) SAMPLING PORT. A SAMPLING PORT WHICH MEETS THE REQUIREMENTS OF AASHTO DESIGNATION T40, "PRACTICE FOR SAMPLING BITUMINOUS MATERIALS", SECTION 9, "SAMPLING FROM PIPELINES DURING LOADING OR UNLOADING", SHALL BE PROVIDED ON THE ASPHALT LINE BEFORE THE INTRODUCTION OF THE ASPHALT INTO THE MIX PLANT. THIS SAMPLING PORT SHALL BE DOWN STREAM FROM THE ADDITION OF ANY ADDITIVES OR MODIFIERS AND ANY DISPERSING OR MIXING EQUIPMENT ASSOCIATED WITH THEIR INTRODUCTION. (2) MIXING OR DISPERSING EQUIPMENT. THE CONTRACTOR SHALL BE RESPONSIBLE FOR DETERMINING THE EXTENT OF ANY MIXING OR DISPERSING EQUIPMENT NEEDED, AND PROCURING, INSTALLING AND MAINTAINING THAT EQUIPMENT. (3) LABORATORY. CONTRACTOR SHALL SECURE A LABORATORY WHICH IS EQUIPPED AND STAFFED TO PERFORM THE TESTS INDICATED IN THIS SPECIFICATION. THE LABORATORY MAY BE ON-SITE OR OFF-SITE, MAY BE OWNED BY THE CONTRACTOR OR MAY BE AN AGENT OF THE CONTRACTOR. ALL TEST EQUIPMENT AT THE LABORATORY SHALL BE CALIBRATED AND CERTIFIED IN ACCORDANCE WITH THE 900-K SERIES OF TXDOT'S MANUAL

4 OF TESTING PROCEDURES, THE MANUFACTURER'S RECOMMENDATIONS, OR THE APPROPRIATE AASHTO TEST PROCEDURES. 6. STORAGE AND HEATING OF ASPHALT MATERIALS. ASPHALT SHOULD NOT BE HEATED TO A TEMPERATURE IN EXCESS OF THAT RECOMMENDED BY THE MANUFACTURER. THE CONTRACTOR SHOULD BE AWARE THAT SOME MODIFIED BINDERS MAY BE SENSITIVE TO HEAT HISTORY OR MAY SEPARATE IF NOT AGITATED. 7. ACCEPTANCE PLAN. (1) GENERAL. ACCEPTANCE OF THE ASPHALT BINDER WILL BE BASED ON THE ACCEPTANCE PLAN DESCRIBED HEREIN. RANDOM SAMPLING OF THE ASPHALT BINDER SHALL BE PERFORMED ON A LOT AND SUBLOT BASIS. THE PERFORMANCE GRADED BINDERS SPECIFIED, SAMPLED, AND TESTED SHALL BE INCLUSIVE OF ALL MODIFIERS AND ADDITIVES. (2) PRECONSTRUCTION SAMPLES AND TESTING. THE CONTRACTOR IS RESPONSIBLE FOR LOCATING A SUPPLY OF ASPHALT BINDER WHICH MEETS THE SPECIFICATION REQUIREMENT OF THE PROJECT. FOR PERFORMANCE GRADED BINDERS, THE CONTRACTOR SHALL DELIVER TO THE ENGINEER A SAMPLE OF THE ASPHALT PROPOSED FOR USE AND A TEST REPORT FROM A LABORATORY MEETING THE REQUIRED CERTIFICATION LEVEL, SHOWING COMPLETE AASHTO MP1 BINDER TESTING, REPRESENTING THAT SAMPLE, INDICATING COMPLIANCE WITH THE SPECIFIED PERFORMANCE GRADE. THE SAMPLE SHALL BE DELIVERED TO THE ENGINEER EITHER: A) AT THE POINT OF BITUMINOUS MIXTURE DESIGN VERIFICATION FOR PROJECTS IN WHICH BITUMINOUS MIXTURE PRODUCTION AND/OR PLACEMENT IS GOVERNED BY A QC/QA SPECIFICATION, OR B) AT LEAST 15 WORKING DAYS PRIOR TO THE ESTIMATED START OF THE PAVING, WHERE BITUMINOUS MIXTURE PRODUCTION AND/OR PLACEMENT IS NOT GOVERNED BY A QC/QA SPECIFICATION. THE ENGINEER WILL SUBMIT THE SAMPLE AND A COPY OF THE LABORATORY REPORT TO THE MATERIALS AND TESTS DIVISION FOR CONFIRMATION TESTING. THE MATERIALS AND TESTS DIVISION WILL COMPLETE CONFIRMATION TESTING OF THE SAMPLE WITHIN TEN (10) WORKING DAYS OF RECEIPT OF THE SAMPLE. IF CONFIRMATION TESTING OF THE SAMPLE DOES NOT CONFIRM THE SPECIFIED PG BINDER, THE CONTRACTOR SHALL PROVIDE ANOTHER SAMPLE AND ASSOCIATED LAB REPORT FOR CONFIRMATION TESTING. THE CONTRACTOR SHALL BEAR THE COST ASSOCIATED WITH ALL TXDOT PRECONSTRUCTION CONFIRMATION TESTING BEYOND THE FIRST SAMPLE. CHARGES SHALL BE ACCRUED AT RATES DETERMINED AND PUBLISHED BY THE MATERIALS AND TESTS DIVISION. PRODUCTION OF BITUMINOUS MIXTURE SHALL NOT BEGIN UNTIL TXDOT CONFIRMATION TESTING INDICATES COMPLIANCE WITH THE PG BINDER SPECIFIED. (3) CONSTRUCTION SAMPLING. (A) GENERAL. THE LOT AND SUBLOT SIZES ARE DETERMINED DAILY ACCORDING TO THE APPROPRIATE DEFINITIONS. ALL SAMPLING LOCATIONS WITHIN THE SUBLOT WILL BE DETERMINED BY THE RANDOM SAMPLING PROCEDURE DEFINED IN TEST METHOD TEX-225-F. THE ENGINEER IS RESPONSIBLE FOR ESTABLISHING THE RANDOM SAMPLING PLAN

5 IT IS THE INTENTION OF THIS SPECIFICATION THAT WHEN BITUMINOUS MIXTURE PRODUCTION IS CONTROLLED BY A QC/QA SPECIFICATION, THE SAMPLING OF BINDER SHALL OCCUR AT APPROXIMATELY THE SAME POINT IN THE SUBLOT AS BITUMINOUS MIXTURE SAMPLING. FOR BITUMINOUS MIXTURE PRODUCTION NOT GOVERNED BY A QC/QA SPECIFICATION ACTUAL SAMPLING POINTS SHALL BE LOCATED BY THE SAME PROCEDURE USED IN DETERMINING THE SUBLOT SAMPLING POINT IF THE PRODUCTION OF BITUMINOUS MIXTURE WAS GOVERNED BY A QC/QA SPECIFICATION. (B) SAMPLING. ALL SAMPLES SHALL BE TAKEN FROM THE SAMPLING PORT AFTER A SUFFICIENT AMOUNT OF ASPHALT IS RUN OUT AND WASTED, IN ORDER TO CLEAR ANY RESIDUAL ASPHALT WHICH BUILDS UP IN THE SAMPLING PORT. SAMPLING SHALL BE CONDUCTED BY THE CONTRACTOR AND MAY BE WITNESSED BY TXDOT. FOR EACH SUBLOT, A FOUR (4) LITER ASPHALT SAMPLE SHALL BE TAKEN FROM THE ASPHALT CONCRETE PLANT SAMPLING PORT, IMMEDIATELY STIRRED AND USED TO FILL THREE (3), ONE (1) LITER SAMPLES. SAMPLE CONTAINERS SHALL BE PROVIDED BY THE CONTRACTOR AND SHALL BE CLEAN, DOUBLE FRICTION TOP, ROUND, ONE (1) LITER CANS. SAMPLES SHALL BE LABELED AS QUALITY ASSURANCE, VERIFICATION AND REFEREE. EACH LABEL SHALL ALSO STATE THE BINDER GRADE, LOT AND SUBLOT NUMBERS AND OTHER INFORMATION AS REQUIRED BY THE ENGINEER. VERIFICATION AND REFEREE SAMPLES SHALL BE PROPERLY LABELED AND DELIVERED TO THE ENGINEER DAILY. UNUSED VERIFICATION AND REFEREE TEST SAMPLES MAY BE DISCARDED AFTER THE CONTRACTOR ACCEPTS THE PAY ADJUSTMENT FACTOR FOR THAT LOT. (4) CONSTRUCTION TESTING. (A) QUALITY CONTROL TESTING. QUALITY CONTROL IS PERFORMED BY THE CONTRACTOR AND CONSISTS OF ANY BINDER TESTING AT ANY FREQUENCY DEEMED NECESSARY OR DESIRABLE BY THE CONTRACTOR TO CONTROL THE PROCESS, SUCH AS LOW TEMPERATURE AASHTO MP1 TESTING OR SURROGATE TESTING. RESULTS OF QUALITY CONTROL TESTS WILL NOT BE USED FOR PAY ADJUSTMENT PURPOSES. (B) QUALITY ASSURANCE TESTING. QUALITY ASSURANCE SHALL BE PERFORMED BY THE CONTRACTOR OR THE CONTRACTOR'S REPRESENTATIVE. ONE OF THE SUBLOT SAMPLES FROM EACH LOT WILL BE SELECTED AT RANDOM FOR PARTIAL AASHTO MP1 TESTING. THE SAMPLE TO TEST WILL BE SELECTED BY USING TEST METHOD TEX-225- F PART I TO ACQUIRE A RANDOM NUMBER. THE RANDOM NUMBER SHALL BE MULTIPLIED BY THE NUMBER OF SUBLOTS IN THE LOT, ADDED TO 0.5 AND THE RESULT ROUNDED TO THE NEAREST WHOLE NUMBER. THIS WILL RESULT IN GENERATION OF AN INTEGER WHICH SHALL BE THE SUBLOT SAMPLE FOR TEST. THE TESTING WILL CONSIST OF AASHTO T240 (RTFOT AGING) AND AASHTO TP5 (DYNAMIC SHEAR TESTING). RESULTS SHALL BE PRESENTED TO THE ENGINEER IN THE FORM OF A STATISTICAL PROCESS CONTROL (SPC) CHART. THESE TESTS WILL BE USED FOR DETERMINING THE PAY FACTOR UNLESS TXDOT TESTING DOES NOT VERIFY CONTRACTOR QA TESTING

6 (C) VERIFICATION TESTING. THE CONTRACTOR SHALL PROVIDE THE ENGINEER WITH ALL SPLIT SAMPLES INTENDED FOR VERIFICATION TESTING. VERIFICATION TESTING WILL BE CONDUCTED BY TXDOT AND WILL CONSIST OF TWO TIERS: 1) HIGH TEMPERATURE VERIFICATION TESTING IS PERFORMED BY TXDOT (DISTRICT LAB) ON A MINIMUM OF ONE (1) IN EVERY 12 SUBLOTS. THE TESTING WILL CONSIST OF AASHTO T240 (RTFOT AGING) AND AASHTO TP5 (DYNAMIC SHEAR TESTING). 2) COMPLETE AASHTO MP1 VERIFICATION TESTING, INCLUDING LOW TEMPERATURE TESTING, IS PERFORMED BY TXDOT (MATERIALS AND TESTS DIVISION) ON ONE SUBLOT SAMPLE TAKEN ON THE FIRST DAY OF PRODUCTION AND A MINIMUM OF ONE (1) IN EVERY 36 SUBLOTS THEREAFTER. SINCE PAY FACTORS ARE DETERMINED FROM THE HIGH TEMPERATURE PROPERTIES, ANY TIME TESTING DOES NOT CONFIRM THE LOW TEMPERATURE PROPERTIES, PRODUCTION SHALL CEASE UNTIL TEST RESULTS FROM THE CONTRACTOR OR OTHER INFORMATION INDICATE, TO THE SATISFACTION OF THE ENGINEER, THAT THE MATERIAL NEXT TO BE PRODUCED WILL MEET THE SPECIFIED VALUES. IF PRODUCTION HAS BEEN CEASED BY FAILURE TO COMPLY WITH THE SPECIFICATIONS FOR LOW TEMPERATURE PROPERTIES, A SAMPLE FROM THE FIRST LOT OF PRODUCTION AFTER PRODUCTION RESUMES WILL BE TESTED BY TXDOT FOR VERIFICATION OF LOW TEMPERATURE PROPERTIES. THE RESULTS FROM THE CONTRACTOR QUALITY ASSURANCE TESTS AND TXDOT'S VERIFICATION TESTS WILL BE CHECKED AGAINST THE MAXIMUM DIFFERENCE SHOWN IN TABLE 1. IF THE CONTRACTOR AND THE ENGINEER'S TEST RESULTS ARE WITHIN THE TOLERANCES SHOWN IN TABLE 1, THE CONTRACTOR PERFORMED QUALITY ASSURANCE TEST RESULTS WILL BE USED TO DETERMINE THE PAY ADJUSTMENT FACTORS. IF THE QUALITY ASSURANCE TESTS AND THE VERIFICATION TESTS ARE NOT WITHIN THE TOLERANCES SHOWN IN TABLE 1, VERIFICATION TESTS WILL BE PERFORMED ON THE REMAINING SUBLOTS FOR THAT LOT UNLESS THE ENGINEER AND THE CONTRACTOR AGREE OTHERWISE. IF THE ENGINEER AND THE CONTRACTOR CAN AGREE ON A PAY ADJUSTMENT FACTOR BASED ON THE RESULTS OF EITHER ALL THE QUALITY ASSURANCE TEST RESULTS OR ALL THE VERIFICATION TEST RESULTS FOR THE LOT IN QUESTION, THEN NO FURTHER ACTION IS NEEDED. IF AN AGREEMENT CANNOT BE MADE, THEN REFEREE TESTING AS SPECIFIED IN SUBARTICLE 7.(4)(D) WILL BE PERFORMED. IF ANY BINDER PAY ADJUSTMENT IS DETERMINED TO BE BELOW 0.00 FOR A LOT, THE CONTRACTOR SHALL CLOSELY EVALUATE AVAILABLE INFORMATION AND DETERMINE THE LIKELY CAUSE OR CAUSES OF THE PROBLEM. IF THE BINDER PAY ADJUSTMENT FACTOR FOR TWO (2) CONSECUTIVE LOTS IS BELOW 0.00, CORRECTIVE ACTION SHALL BE TAKEN BY THE CONTRACTOR. IF THE BINDER PAY ADJUSTMENT FACTOR FOR THREE (3) CONSECUTIVE LOTS IS BELOW 0.00, PRODUCTION SHALL CEASE UNTIL TEST RESULTS OR OTHER INFORMATION INDICATE, TO THE SATISFACTION OF THE ENGINEER, THAT THE NEXT MATERIAL TO BE PRODUCED WILL MEET THE SPECIFIED VALUES

7 TABLE 1. MAXIMUM ALLOWABLE DIFFERENCE BETWEEN CONTRACTOR AND ENGINEER TESTS TEST METHOD(S) TEST DESCRIPTION MAX. DIFFERENCE AASHTO T240 ROLLING THIN FILM OVEN AGING AND AND AASHTO TP5 DYNAMIC SHEAR TESTING FOR PLUS OR MINUS? G*/SIN (DELTA) QUALITY ASSURANCE TEST RESULTS SHALL BE MADE AVAILABLE NOT LATER THAN FIVE (5) WORKING DAYS AFTER SELECTION OF THE SUBLOT TO BE TESTED. VERIFICATION TEST RESULTS WILL BE AVAILABLE WITHIN FIVE (5) WORKING DAYS AFTER SELECTION OF THE SUBLOT TO BE TESTED. REFEREE TEST RESULTS WILL BE AVAILABLE WITHIN 10 WORKING DAYS AFTER RECEIPT OF THE BINDER SAMPLE BY THE REFEREE LABORATORY. (D) REFEREE TESTING. THE TXDOT MATERIALS AND TESTS DIVISION WILL PERFORM THE REFEREE TESTS. THESE TESTS ARE FINAL AND WILL ESTABLISH PAY ADJUSTMENT FACTORS FOR THE LOT(S) IN QUESTION. TXDOT WILL BE RESPONSIBLE FOR COSTS OF REFEREE TESTING. (5) MULTIPLE PROJECTS. IF BITUMINOUS MIXTURE FOR MULTIPLE PROJECTS IS SIMULTANEOUSLY PRODUCED FROM A SINGLE MIXING PLANT, THE PROJECTS WILL BE CONSIDERED AS INDEPENDENT UNLESS BOTH THE ENGINEER AND THE CONTRACTOR AGREE OTHERWISE IN WRITING. 8. MEASUREMENT. ASPHALT BINDER WILL NOT BE MEASURED DIRECTLY, BUT IS CONSIDERED SUBSIDIARY TO THE ITEM GOVERNING THE BITUMINOUS MIXTURE. 9. PAY ADJUSTMENT FACTORS. THE PAY FACTOR WILL BE DETERMINED AS FOLLOWS: (1) ACCEPTANCE: PG BINDER LOTS WILL BE ACCEPTED AT A PAY ADJUSTMENT FACTOR OF 0.00 WHEN: A) CONTRACTOR SPC CHARTS SHOW G*/SIN (DELTA) IS WITHIN THE SPECIFICATION LIMITS OF THE PG BINDER SPECIFIED, AND B) TXDOT VERIFICATION SAMPLES SHOW COMPLIANCE WITH THE PG BINDER SPECIFIED. (2) PENALTIES: PG BINDER LOTS WILL BE ACCEPTED AT A NEGATIVE PAY ADJUSTMENT FACTOR, OR REMOVED AND REPLACED WHEN CONTRACTOR QA SAMPLES OR TXDOT VERIFICATION SAMPLES DO NOT SHOW COMPLIANCE WITH THE PG BINDER SPECIFIED. PAY FACTORS WILL BE DETERMINED ACCORDING TO ATTACHMENT 2 OF THIS SPECIFICATION. IF THE PAY ADJUSTMENT FACTOR FOR ANY LOT IS LESS THAN 0.00, THE CONTRACTOR HAS THE OPTION TO REMOVE AND REPLACE THE LOT OR AGREE TO ACCEPT THE LOT AT AN ADJUSTED UNIT PRICE DETERMINED BY THE PAY ADJUSTMENT CALCULATION. IF THE PAY ADJUSTMENT FACTOR FOR ANY LOT IS LESS THAN -0.30, THE MATERIAL SHALL BE REMOVED AT THE EXPENSE OF THE CONTRACTOR. REPLACEMENT MATERIAL SHALL MEET THE REQUIREMENTS OF THIS SPECIFICATION WITH PAYMENT MADE ACCORDINGLY. IF ANY BINDER PAY ADJUSTMENT IS DETERMINED TO BE BELOW 0.00 FOR A LOT, THE CONTRACTOR SHALL CLOSELY EVALUATE AVAILABLE INFORMATION AND DETERMINE THE LIKELY CAUSE OR CAUSES OF THE PROBLEM. IF THE

8 BINDER PAY ADJUSTMENT FACTOR FOR TWO (2) CONSECUTIVE LOTS IS BELOW 0.00, CORRECTIVE ACTION SHALL BE TAKEN BY THE CONTRACTOR. IF THE BINDER PAY ADJUSTMENT FACTOR FOR THREE (3) CONSECUTIVE LOTS IS BELOW 0.00, PRODUCTION SHALL CEASE UNTIL TEST RESULTS OR OTHER INFORMATION INDICATE, TO THE SATISFACTION OF THE ENGINEER, THAT THE NEXT MATERIAL TO BE PRODUCED WILL MEET THE SPECIFIED VALUES. (3) BONUSES: PG BINDER LOTS WILL BE ACCEPTED AT A PAY ADJUSTMENT FACTOR OF WHEN: A) CONTRACTOR SPC CHARTS SHOW G*/SIN (DELTA) IS WITHIN THE SPECIFICATION LIMITS OF THE PG BINDER SPECIFIED FOR ALL LOTS, AND B) CONTRACTOR SPC CHARTS FOR G*/SIN (DELTA) SHOW THAT THE BINDER SUPPLY PROCESS IS "IN CONTROL" FOR ALL LOTS, ACCORDING TO THE SPC CHART REQUIREMENTS AND INTERPRETATION FOUND IN ATTACHMENT 3 OF THIS SPECIFICATION, AND C) TXDOT VERIFICATION SAMPLES SHOW COMPLIANCE WITH THE PG BINDER SPECIFIED. BONUSES WILL BE DETERMINED ONLY AT THE COMPLETION OF THE PARTICULAR BID ITEM. 10. PAYMENT. ASPHALT BINDER WILL NOT BE PAID FOR DIRECTLY, BUT IS CONSIDERED SUBSIDIARY TO THE ITEM GOVERNING THE BITUMINOUS MIXTURE. BINDER PAY ADJUSTMENTS DETERMINED BY THIS SPECIFICATION SHALL BE BASED ON THE IN-PLACE UNIT BID PRICE FOR THE BITUMINOUS MIXTURE SPECIFIED AND SHALL BE A SEPARATE PAY ITEM. BINDER PAY ADJUSTMENT * = IN-PLACE BID PRICE X LOT PLACEMENT QUANTITY X PAY ADJUSTMENT FACTOR * CALCULATED AND APPLIED SEPARATELY FROM ANY OTHER BONUSES OR PENALTIES. BINDER PAY ADJUSTMENT FOR ACCEPTANCE AND PENALTIES CAN VARY FROM LOT TO LOT. BINDER PAY ADJUSTMENT FOR BONUSES CAN ONLY BE APPLIED TO ALL LOTS IN THE BID ITEM SINCE THE ASPHALT BINDER PROCESS MUST BE "IN- CONTROL" FOR THE ENTIRE BID ITEM FOR A BONUS PAY FACTOR TO BE AWARDED

9 ATTACHMENT 1 TRAINING/CERTIFICATION OF TECHNICIANS OR LABORATORIES THE LEVEL OF TRAINING/CERTIFICATION REQUIRED IS BASED ON THE TYPE OF TEST BEING PERFORMED TYPE OF TEST REFEREE AASHTO MP1 QUALITY ASSURANCE OR VERIFICATION REQUIREMENTS TXDOT MAT OR THEIR AGENT TRAINED TECHNICIANS (ALL MP TESTS) (NCAT, AI, USER/PRODUCER GROUP TRAINING PROGRAMS, OR SUPERPAVE CENTERS) CALIBRATED EQUIPMENT, AND PARTICIPATION IN TXDOT OR AMRL PROFICIENCY PROGRAM FOR MP1 TESTS. TRAINED TECHNICIANS (RTFOT/DSR) NCAT, AI, USER/PRODUCER GROUP TRAINING PROGRAMS, OR SUPERPAVE CENTERS) AND CALIBRATED EQUIPMENT. REFEREE REQUIREMENTS QUALIFY FOR ALL REFEREE, AASHTO MP1 AND QA/VERIFICATION WORK. AASHTO MP1 REQUIREMENTS QUALIFY FOR ALL AASHTO MP1 AND QA/VERIFICATION WORK. QA/VERIFICATION REQUIREMENTS QUALIFY FOR QA/VERIFICATION WORK ONLY. MAT = MATERIALS AND TESTS DIVISION NCAT = NATIONAL CENTER FOR ASPHALT TECHNOLOGY AI = ASPHALT INSTITUTE

10 ATTACHMENT 2 PAY ADJUSTMENT FACTORS PAY ADJUSTMENT FACTOR CRITERIA ALL THREE OF THE FOLLOWING ARE MET: (A) CONTRACTOR SPC CHART SHOWS RTFOT RESIDUE G*/SIN (DELTA) IS ABOVE 2.20 KPA AT THE SPECIFIED PG HIGH TEMPERATURE FOR ALL LOTS, (B) CONTRACTOR SPC CHART SHOWS ASPHALT BINDER PROCESS IS "IN CONTROL" FOR ALL LOTS, AND (C) ALL TXDOT VERIFICATION RTFOT RESIDUE G*/SIN (DELTA) SAMPLES SHOW COMPLIANCE WITH THE PERFORMANCE GRADE. BONUS PAY ADJUSTMENT FACTORS APPLY TO ALL LOTS IN THE PROJECT IF THE CRITERIA ARE MET BOTH OF FOLLOWING ARE MET: (A) CONTRACTOR SPC CHART SHOWS RTFOT RESIDUE G*/SIN (DELTA) IS ABOVE 2.20 KPA AT THE SPECIFIED PERFORMANCE GRADE HIGH TEMPERATURE FOR THE LOT, (B) TXDOT VERIFICATION SAMPLES SHOW COMPLIANCE WITH PERFORMANCE GRADE. ACCEPTANCE PAY ADJUSTMENT FACTORS (PAY FACTOR = 0.00) APPLY TO INDIVIDUAL LOTS > G*/SIN (DELTA) >= > G*/SIN (DELTA) >= > G*/SIN (DELTA) >= > G*/SIN (DELTA) >= > G*/SIN (DELTA) >= > G*/SIN (DELTA) >= > G*/SIN (DELTA) PENALTY PAY ADJUSTMENT FACTORS APPLY TO INDIVIDUAL LOTS. ** IF THE PAY ADJUSTMENT FACTOR FOR THE LOT IS LESS THAN -0.30, THE ENTIRE LOT IS TO BE REMOVED AND REPLACED AT THE CONTRACTOR'S EXPENSE. ALL G*/SIN (DELTA) VALUES SHALL BE ROUNDED TO THE NEAREST

11 ATTCHMENT 3 SPC CHART REQUIREMENTS AND INTERPRETATION PREPARE A STATISTICAL PROCESS CONTROL CHART ACCORDING TO TEST METHOD TEX-536-C. THE CHART SHALL SHOW DATA FROM ALL QUALITY ASSURANCE AND VERIFICATION TESTS FOR G*/SIN (DELTA) AFTER ROLLING THIN FILM AGING. THE PROCESS WILL BE DETERMINED AS "IN-CONTROL" IF NONE OF THE FOLLOWING ARE TRUE (BASED ONLY ON QUALITY ASSURANCE TESTS): 1) ONE OR MORE POINTS FALL OUTSIDE OF THE CONTROL LIMITS. 2) TWO POINTS, OUT OF THREE CONSECUTIVE POINTS, ARE ON THE SAME SIDE OF THE AVERAGE IN ZONE A OR BEYOND. 3) FOUR POINTS, OUT OF FIVE CONSECUTIVE POINTS, ARE ON THE SAME SIDE OF THE AVERAGE IN ZONE B OR BEYOND. 4) THERE ARE SIX CONSECUTIVE POINTS, INCREASING OR DECREASING. 5) NINE CONSECUTIVE POINTS ARE ON ONE SIDE OF THE AVERAGE. 6) THERE ARE FOURTEEN CONSECUTIVE POINTS THAT ALTERNATE UP AND DOWN. 7) THERE ARE FIFTEEN CONSECUTIVE POINTS WITHIN ZONE C (ABOVE AND BELOW THE AVERAGE. FOR PROJECTS IN WHICH THERE ARE NOT SUFFICIENT QUALITY ASSURANCE DATA POINTS TO EVALUATE ALL ITEMS 1 TO 7 ABOVE, ONLY THOSE ITEMS WITH SUFFICIENT DATA POINTS TO EVALUATE WILL APPLY. IF ANY OF THE ABOVE ARE TRUE THE PROCESS IS DETERMINED TO BE "OUT-OF- CONTROL" AND BONUS FACTORS SHALL NOT APPLY