1. PRESENTED BY: ER. BIMAL CHANDRA DASH SUPERINTENDING ENGINEER CUTTACK (R&B) CIRCLE

2. WHY QUALITY ASSURANCE ? BETTER QUALITY ASSURANCE  IMPARTS LONGER LIFE TO ROAD/STRUCTURE/ SERVICES.  UNIFORMITY IN BEHAVIOUR OF END PRODUCT.  ECONOMIC UTILISATION OF MATERIAL AND OTHER RESOURCES.  CERTAINTY IN BEHAVIOUR OF STRUCTURE.  LOWER RUNNING COST IN MAINTENANCE OF ROADS /BRIDGES /BUILDINGS

3. QUALITY ASSURANCE  PROCESS ORIENTED  FOCUS ON DEFECT PREVENTION  ENSURES NO DEFECTS AFTER COMPLETION  PROACTIVE MEASURE  RESPONSIBILITY ON EVERYONE OF THE TEAM

4. QUALITY CONTROL  PRODUCT ORIENTED  DEFECT IS IDENTIFIED  IDENTIFY AND RECTIFY THE DEFECTS ON COMPLETION  REACTIVE MEASURE  ONLY A SPECIFIC TEAM ENGAGED FOR TESTING

5. Project Quality Management Plan Quality Management Perform Quality Assurance (Pro-act or Re-act) Control Quality Plan – Do – Check - Act Repeat PDCA Circle

6. CLASSIFICATION OF QA AS PER IRC-SP-57-2000 Class of QARecommended road Q-1Village roads Q2ODR, MDR Q3 SH, NH, costal roads, Roads in high rainfall area Q4 Expressway, Roads in tunnels / cutting sections, Road as reclaimed land We take Q2 Q3 category depending on project test.

7. STAGES OF QUALITY ASSURANCE IN PUBLIC WORKS PROJECTS  PRE CONSTRUCTION STAGE  DURING CONSTRUCTION  POST CONSTRUCTION STAGE.

8. PRE-CONSTRUCTION STAGE  PROJECT PREPARATION STAGE  DRAWING & DESIGN STAGE  CONTRACT DOCUMENT PREPARATION STAGE.

9. QUALITY ASSURANCE IN PROJECT PREPARATION STAGE (A) ROAD PROJECT  CORRECT DATA COLLECTION LIKE  ROAD INVENTORY DATA (EXISTING CRUST, GEOMETRICS, SUBMERGENCE STRETCH, ROW ETC.)  CD / BRIDGE INVENTORY DATA.  SOIL INVESTIGATION DATA ETC.  MUST BE COLLECTED EITHER BY SELF OR BY ENGAGEMENT OF CONSULTANT ON DIRECT SUPERVISION.  ACCURATE TOPOGRAPHIC SURVEY BY SOPHISTICATED EQUIPMENT.

10. (b) Bridge & Building Projects Subsoil Exploration Collection of Hydraulic data of the stream like HFL, LWL, Length of Waterway Stream topography Bearing Capacity for Building Projects GWT Seismic Zone Indentification.

11. QUALITY ASSURANCE IN DESIGN & DRAWING STAGE  ACCURATE DATA FEEDING  SELECTION OF SUITABLE MATERIAL / LOCALLY AVAILABLE MATERIAL  ACCURATE GEOMETRIC DESIGN FOR ROAD  DESIGNING LONGITUDINAL PROFILE BASED ON GWT & AVAILABLE ROW.  PROVISION OF SUITABLE CD / LONGITUDINAL DRAIN, SLOPE PROTECTION WORKS  PROVISION OF SUITABLE ROAD FURNITURE AND SAFETY FEATURES.  SUITABLE ROAD CONSTRUCTION EQUIPMENTS FOR SPECIFIC PRO JECT.  SELECTION OF SUITABLE FOUNDATION FOR BRIDGE & BUILDING PROJECTS

12. QUALITY ASSURANCE IN CONTRACT DOCUMENTATION STAGE  STANDARDISE DETAILS TECHNICAL SPECIFICATION.  STIPULATION ON TYPE CAPACITY OF ESSENTIAL CONSTRUCTION EQUIPMENT TO BE USED  STIPULATION FOR SETTING UP OF SITE LABORATORY WITH SPECIFIC MINIMUM TESTING EQUIPMENTS.  STIPULATION WITH REGARDS TO QUALIFIED & EXPERIENCED KEY PERSONNEL OF CONTRACTOR AT SITE AND ALSO MANAGEMENT ORGANISATION OF OWNER.  STIPULATION FOR PREPARATION OF QA MANUAL & TO BE APPROVED BY ENGINEER  SPECIFIC DEFECT LIABILITY PERIOD WITH RESPONSIBILITY OF CONTRACTOR & CLIENT DEFINED IN DOCUMENT.

13. QUALITY ASSURANCE DURING CONSTRUCTION  MOBILISATION OF REQUIRED SUITABLE MACHINERY  SETTING UP OF ADEQUATE FIELD LABORATORY  APPOINTMENT OF QUALIFIED & EXPERIENCED TECHNICAL PERSONNEL  PREPARATION OF QA PLAN & SUBMISSION FOR APPROVAL.  SOURCE APPROVAL OF CONSTRUCTION MATERIAL

14. Contd.... Preparation & approval of Mix design of concrete to be used in different components of building & bridge works. Preparation & approval of mix design of DBM & BC works. Preparation & approval of job mix formulae for GSB, WMM works. Preparation of working drawing. Design of suitable Bearing for bridge works. P-neo prine, Pot-PTFE etc.

15. SOURCE APPROVAL OF CONSTRUCTION MATERIALS a)MATERIAL FROM NATURAL SOURCES  CRUSHED STONE AGGREGATE  SAND  MOORUM / EARTH  FLY ASH  WATER SUITABILITY

16. B) FACTORY MANUFACTURED ITEMS LIKE  BITUMEN  CEMENT  STEEL  CHEMICAL ADMIXTURE  ROAD MARKING PAINT  ROAD FURNITURE  DIFFERENT BRIDGE MATERIALS

17. SOURCE APPROVAL OF MATERIALS FOR NATURAL RESOURCES  BORROW AREA EARTH

18.  Crushed stone aggregate

19.  FLY ASH

21. SOURCE APPROVAL TO FACTORY MANUFACTURED ITEM BITUMEN:- PENETRATION GRADE  80/00, 60/70, 30/40 VISCOSITY GRADE  BITUMEN IS TO BE SELECTED IN THE VISCOSITY GRADE LIKE VG-10, VG-20, VG-30 & VG-40  SELECT BITUMEN FOR APPROVED REFINERY ONLY FOR UNIFORMITY IN QUALITY.  OBTAIN MANUFACTURER’S TEST CERTIFICATE.  CONDUCT INDEPENDENT QUALITY TEST AT BEGINNING OR ANY CHANGE IN THE SOURCE.

24. BITUMEN EMULSION THIS MAY BE ANIONIC- BITUMEN GLOBULES ARE – VELY CLAD. CATIONIC- BIT GLOBULES ARE + VELY CHANGED. DEPENDING UPON THE TIME PERIOD FOR BITUMEN PARTICLES COAGULATE. THE EMULSION CAN BE CLASSIFIED AS: RAPID SETTING(RS) MEDIUM SETTING(MS) SLOW SETTING (SS) WE GENERALLY USE CATIONIC BITUMEN EMULSION IN ROAD WORK CONFIRMING TO IS-8887.

25. MODIFIED BITUMEN SELECTION CRITERIA FOR GRADE OF MODIFIED BITUMEN HIGHEST DAILY MEAN AIR TEMPERATURE, C Lowest Daily Mean Air Temperature, ⁰ C Less than 20 ⁰ C20 to 30 ⁰ CMore than 30 ⁰ C Grade of Modified Bitumen More than – 10 ⁰ C PMB/NRMB 120 CRMB 50 PMB/NRMB 70 CRMB 55 PMB/NRMB 40 CRMB 60 -10 ⁰ C or lowerPMB/NRMB 120 CRMB 50 PMB/NRMB 120 CRMB 50 PMB/NRMB 70 CRMB 55 PMB- Polymer modified Bitumen NRMB - Natural Rubber modified bitumen CRMB - Crumb rubber modified bitumen may be CRMB-50,55 or 60

26. QA FOR EARTH WORK IN EMBANKMENT, SUBGRADE & SHOULDER SELECTION OF BORROW AREAS. TEST TO BE CONDUCTED AS PER IS-2720.  PLASTIC LIMIT  PLASTICITY INDEX  FEE SWELLING INDEX (NOT EXCEEDS 50%)  OMC  MDD  CBR(4 DAYS WATER SOAKED)  LIQUID LIMIT  ACCEPTANCE CRITERIA AS PER CL.4.4 OF IRC-36-2010.  GRAIN SIZE ANALYSIS

27.  SELECTION OF MATERIAL  COLLECTION IN STOCK PILE  DESIGN OF JOB MIX FORMULA  TESTING OF PHYSICAL PROPERTIES AND DESIGN TO BE DONE BY THIRD PART LABORATORY & SUBMITTED FOR APPROVAL BEFORE COMMENCEMENT OF WORK.  GRADING TO BE CONFIRMED AFTER DRY MIXING (AT STOCK PILE)  AFTER LAYING & COMPACTION,FIELD DENSITY & DEGREE OF COMPACTION TO BE ACHIEVED IN EACH LAYER.  CROSS FALL & CAMBER AT FINAL LAYER. QA IN GSB CONSTRUCTION

28. QA FOR BITUMINOUS MACADAM & DBM

35.  SAMPLING OF MATERIAL FROM PLANT AND STOCK PILE  MIX DESIGN FOR DBM AND DESIGN MIX FOR BM TO BE CONDUCTED FROM A THIRD PARTS LAB.  GRADING OF AGGREGATE, BITUMEN CONTENT OF MIX IS ASCERTAINED.  HOT MIX PLANT MUST SATISFY THE STANDARD SPECIFICATION.  PHYSICAL PREPARATION OF BITUMEN TO BE TESTED BEFORE MIX  BITUMEN HEATING TEMP MUST BE RECORDED  CALIBRATION OF HM PLAN TO BE DONE BEFORE COMMENCEMENT QA IN BM & DBM (Contd.)

36.  AGGREGATE GRADING – SAMPLE COLLECTED FROM GATHERING BIN MUST BE CHECKED.  MIX TEMP AFTER THE PRODUCTION MUST BE CHECKED AT PLANT  AFTER CONFORMATION OF ABOVE TESTS THE MIX MAY BE DESPATCHED  AT SITE LAYING TEMP, ROLLING TEMP CROSS FALL/CAMBER, THICKNESS AND BITUMEN CONTENT MUST BE CHECKED.  PAVING BY HYDRAULIC SENSOR PAVER IS PREFERRED.  DEGREE OF COMPACTION TESTING TO BE DONE BY CORE CUTTER. (Contd.)

37. QA DURING POST CONSTRUCTION STAGE. Improvement of riding quality of newly constructed road by Rougho-meter, bump Integrator. Confirmation of structural strength by Benkle nam – Beam Deflection test. Auditing of geometrics of road. Road safety Audit. Provision of way side amenities. Highway patrolling system O & M annual contract system. Road side and median arboriculture. Road signages & protection works.