Checklist – CAC048M Plant Mixed Stabilised Pavements using Cement (MRTS08) Contractor Date Review No. Contract No. Project No. Project Name Reference Requirements Addressed Materials MRTS08 Cl 6 MRTS08.1 Cl 2 MRTS08.1 Cl 2 MRTS05 Cl 8.2 Are the material stockpiles in accordance with the specification requirements? Stockpile sites approved by the administrator Stockpiles a minimum of 200 m from residences Individual stockpiles are clearly identified Does the unbound pavement material meet the requirements of the Specification? Pavement material Type 2.1 B or B Grading Does the granular material meet the requirements of MRTS05 Unbound Pavements? MRTS08 Cl 6 MRTS08.1 Cl 7 The Contractor has demonstrated the material complies Hold Point 4 Is the stabilising agent in accordance with the Specification? GB Cement blend 25% flyash and 75% cement Comments/Observations Checklist CAC048M, Plant Mixed Stabilised Pavements using Cement Reference MRTS08.1 Cl 7 Requirements Addressed Comments/Observations Has preliminary testing of pavement material been completed? UCS of 1.0–1.5 MPa Shrinkage does not exceed 500 microstrains at 20 days Construction (Preliminary MRTS08 Cl 8 Have the following preliminary activities been completed? Permission to proceed granted to cover underlaying layer Hold Point 2 Appropriate plant available and in use on the site Construction (Mixing Equipment) MRTS08 Cl 8 Does the pugmill meet the Specification requirements? Pugmill Storage silo Facilities for storing water and admixtures Calibrated and controlled metering systems for stabilising agent, admixtures and water Necessary conveyors, power supply and controls Control system with variable feed for each constituent Displays to monitor each constituent Pugmill is capable of producing complying material Pugmill is capable of uniformly incorporating each constituent Pugmill is capable of producing a consistent material free from segregation Contract Administration System, Transport and Main Roads, April 2015 2 Checklist CAC048M, Plant Mixed Stabilised Pavements using Cement Reference Requirements Addressed Pugmill is capable of 150 t/hr or the Contractor’s placing rate whichever is greater Pugmill is capable of continuously meeting the Contractor’s placing rate Pugmill is capable maintaining a consistent proportion of stabilising agent (maximum deviation 0.3%) The pugmill has a waterproof/watertight mixture storage bin Calibration checks recorded and reported to the Administrator Comments/Observations Construction (Delivery Equipment) MRTS08 Cl 8 Does the delivery equipment meet the Specification requirements? Open body trucks Truck bodies are covered Trucks discharge without segregation Trucks equipped to discharge without spillage Sufficient trucks available to match the Contractor’s placing rate Construction (Paving Equipment) MRTS08 Cl 8 Does the equipment for water curing meet the Specification requirements? Purpose-built self-propelled machine Spreads mixture to required uncompacted layer thickness, width seven shape in one pass Does not segregate the mixture Contract Administration System, Transport and Main Roads, April 2015 3 Checklist CAC048M, Plant Mixed Stabilised Pavements using Cement Reference Requirements Addressed Comments/Observations Construction (Water Curing) MRTS08 Cl 8 MRTS08 Cl 8 Does the equipment for water curing meet the specification requirements? Capacity of at least 6000 lts Discharges a fine even mist No slurrying, pavement instability, erosion and leaching of stabilising agent. Do the water curing operations fulfil the requirements of the Specifications? The surface is maintained continuously damp Water curing continues until the layer is covered or sealed Construction (Preparation of the layer edges and surfaces) MRTS08 Cl 8 Does the equipment for preparation of the layer edges and surfaces meet the Specification requirements? Edges cut cleanly and vertical All cut material removed Construction (Allowable working time) MRTS08 Cl 8 Are the works completed in the allowable working time? Material mixed, compacted and trimmed within two hours Construction (Checks of Application Rates) MRTS08 Cl 8 Are checks of the application of stabilising agent being performed in accordance with the Specification requirements? The application of stabilising agent shall be checked and recorded every hour as kgs/t pavement material Contract Administration System, Transport and Main Roads, April 2015 4 Checklist CAC048M, Plant Mixed Stabilised Pavements using Cement Reference MRTS08 Cl 8 Requirements Addressed Comments/Observations Are checks of the application of admixture being performed in accordance with the Specification requirements? Actual admixture content within +/- 10% of approved content Construction (Joints) MRTS08 Cl 8 Are joints being constructed in accordance with the requirements of the Specification? No longitudinal joints in traffic wheel paths Longitudinal joint offset a minimum of 150 mm from under laying longitudinal joint The outside 300 mm of the first run is left uncompacted in fresh joints (joints within two hours of mixing) Cut joints are a minimum 150 mm or to compacted material Cut back edges have a cement slurry applied immediate before placing the adjoining layer Slurry place at 2 kg/m² Water/cement ratio of slurry is between 0.6 and 0.7 Additional slurry applied if slurry sets Construction (Bitumen Curing Coat) MRTS08 Cl 8 Do the bitumen curing operations fulfil the requirements of the specifications? Bitumen curing coat applied within seven days Water curing maintained from time of compaction until placing bitumen Cover material is spread prior to trafficking Contract Administration System, Transport and Main Roads, April 2015 5 Checklist CAC048M, Plant Mixed Stabilised Pavements using Cement Reference Requirements Addressed Comments/Observations Construction (General) MRTS08 Cl 8 MRTS08 Cl 8 Are the climatic conditions suitable? No rain or rainfall imminent Conditions do not pose a nuisance or danger to people, property or the environment Stockpile temperature is 10°C or above Air temperature does not exceed 40°C Has the Contractor’s work operations met the requirements of the Specification? Existing surface swept clean No dust or loose particles Cement slurry applied immediate before placing the adjoining layer Layer thickness 100–250 mm Slurry place at 2 kg/m² Water/cement ratio of slurry is between 0.6 and 0.7 Additional slurry applied if slurry sets Moisture content of mixture within +/- 1% of optimum No segregation evident Standard of Product MRTS08 Cl 8 Has the construction met with the requirements of the specification? Horizontal +/- 50 mm except for edges – 50 mm + 250 mm and adjustments to align to existing pavement or structures Vertical +/- 15 mm Maximum 5 mm deviation from 3 m straight edge Contract Administration System, Transport and Main Roads, April 2015 6 Checklist CAC048M, Plant Mixed Stabilised Pavements using Cement Reference Requirements Cross not more than 0.5% Surface evenness 50 counts/km The CV of the RDD is 100% No segregation evident No visible movement in any layer Addressed Comments/Observations Curing Coat MRTS08.1 Cl 8 Has the Contractor scheduled Prime and Seal as per the contract Prime AMCOO has been scheduled Seal Class PMB (S4.5S) has been scheduled 10 mm cover material on site *Key C = Conformance NFV = Not Fully Verified N/A = Not Applicable IP = Improvement NC = Non-Conformance Reviewed by: Name Contract Administration System, Transport and Main Roads, April 2015 Signature Date 7