Bids Are Invited For Hiring Company(S) To Supply Material And Labor For Rigid Paving In Fiber Reinforced Con ... in Brazil

Work Detail

Labor For Concrete Paving, In Accordance With The Technical Specifications And The Executive Project Provided By The Municipality Of Caibi/Sc, And The Services Include The Application Of Concrete With A Thickness Defined In The Project, Including The Supply And Use Of Metal Or Fiber Forms, Compatible With The Thickness And Dimensions Of The Road, Duly Leveled And Aligned To Guarantee The Correct Finishing And Conformity With The Technical Project. Execution Must Meet The Following Minimum Conditions:- Application Of Concrete On A Duly Prepared And Regularized Base, With The Installation Of Plastic Tarpaulin Between The Base And The Floor, According To Technical Guidance;- The Concrete Must Be Mechanically Vibrated, With The Use Of Immersion Vibrators, Ensuring Perfect Compaction, Avoiding Voids And Providing Greater Resistance And Durability To The Pavement;- Leveling And Finishing Must Be Carried Out With A Lattice Vibrating Rule, Of Sufficient Size To Meet The Total Width Of The Track To Be Paved, Ensuring Flatness And Fit According To The Project In Addition To A Smooth Finish;- Transfer Bars Must Be Installed, In Accordance With The Specifications And Dimensions Defined In The Design, In Order To Ensure Adequate Transfer Of Loads Between The Concrete Slabs;- After Initial Curing, Cutting Of The Retraction And Expansion Joints Must Be Performed, According To Project Specifications, With Suitable Equipment That Guarantees Uniform And Precise Cuts;- The Application Of Chemical Curing Must Be Performed On The Entire Surface Of The Floor, In A Homogeneous Way And Continuous, In Order To Avoid The Early Loss Of Water And Guarantee The Adequate Gain In Strength Of The Concrete. - All Services Must Be Executed In Compliance With Abnt Technical Standards, Dnit Specifications And Other Applicable Legislation, Under Technical Supervision And Monitoring By The Municipalitys Engineering Team., Machined Concrete Minimum Fk 30, Reinforced With Polypropylene Fiber Crf50/4 (45Mm), Alkalinity Resistant To Guarantee The Durability Of The Concrete, Must Meet The Following Requirements: - Addition Of Shrinkage Reducer Of 8.0 Kg/M³; - Minimum Compressive Resistance Of 30 Mpa At 28 Days; - Minimum Content Of 4.5 Kg/M³ Of Crf50/4 Polypropylene Fiber; - Macro Fiber Elasticity Module Between 6 And 9 Gpa; - Presentation Of A Report In Accordance With Standard Nbr 16940; - Compliance With The Minimum Results Defined In Test Standard Nbr 16940.Unit Characteristicsvalue1.Compression Resistance (Fck)Mpa302.Flexion Tensile Strength (Fctm, K)Mpa4, 23.Slump Test)Mm100 To 1204.Modulus Of Elasticitygpabetween 26 And 305.Entrained Air Content%≪3.06. Exudation%≪2.07.Drying Shrinkage%≪0.028.Water/Cement Ratio-≪0.59.Start Time Of Set Hoursapprox. 4 Hours10.Mortar Content%48 To 5211.Cement Consumptionkg/M³≫35012. Shrinkage Reducing Additivekg/M³8a The Choice Of Materials Used For The Production Of Concrete Must Be Guided By The Standards And Principles Of The Abnt. Type Cp-Ii Cement Must Be Used. Cements With High Levels Of Additions Should Be Avoided As They Are Problematic In The Finishing Phase Of The Concrete. Fine Aggregates Should Preferably Be Made Up Of Natural Sand Of Quartz Origin, Of Medium To Coarse Grain Size, Or Artificial Sand From Rock Crushing, Conveniently Dosed With Natural Sand To Correct Deficiencies In Fines. Attention Must Be Paid

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