Macro Synthetic Fibre Reinforced Ground Slabs 2018-06-25¢  Macro Synthetic Fibre Reinforced Ground Slabs

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  • Macro Synthetic Fibre Reinforced Ground Slabs

    www.barchip.com

    A Guide to the Design and Construction of Macro Synthetic Fibre Reinforced Ground Supported Slabs

    - Industrial Concrete Floors and Pavements

    Revision 3: April 2018

  • Written by: Tommy Wong B.E. (Hons) Approved by: Edward A Bennett (NPER 198230) Date: 11/06/2014

    Revised by: Ralf Winterberg MSc PhD and Todd Clarke B.E. (Hons) Approved by:Ralf Winterberg MSc PhD Date: 08/05/2017 This document is provided by BarChip Inc. for the purposes of education and guidance in the methodology behind designing ground supported slabs in accordance with the UK Concrete Society’s Technical Report 34 (TR34) 4th Edition 2013. As such BarChip recommends that upon receiving this copy that you take the time to register your details with your local BarChip representative. This will enable BarChip to provide you with updates/revisions to the document as they arise, which will maintain the accuracy and usability of this manual.

    For more information, please contact:

    info@barchip.com

    © 2018 BarChip Inc. All Rights Reserved

    Flooring Design Manual BarChip Inc. 20182

  • 1. Introduction.....................................................................................................................................................

    2. Synthetic Fibres in Concrete............................................................................................................................

    2.1 General.......................................................................................................................................................

    2.2 Strength Performance.................................................................................................................................

    2.2.1 Compressive Strength.......................................................................................................................

    2.3 Plastic Shrinkage and Settlement Cracking........................................................................................

    2.4 Durability............................................................................................................................................

    2.5 Concrete Mix......................................................................................................................................

    2.6 Design Considerations........................................................................................................................

    3. Synthetic Fibre Properties................................................................................................................................

    3.1 General................................................................................................................................................

    3.2 Macro Synthetic Fibres – BarChip.....................................................................................................

    4. Design of Ground Supported Slabs using BarChip Fibre Reinforcement.......................................................

    4.1 General...............................................................................................................................................

    4.2 Partial Safety Factors..........................................................................................................................

    4.3 Design Procedure Input Data (Step 1)................................................................................................

    4.3.1 Strength Properties for Concrete (Step 1-1)..........................................................................

    4.3.2 Flexural Tensile Strength (Step 1-2).....................................................................................

    4.3.3 Radius of Relative Stiffness (Step 1-3).................................................................................

    4.4 Structural Properties (Step 2).............................................................................................................

    4.4.1 Negative Moment Capacity (Step 2-1)..................................................................................

    4.4.2 Positive Moment Capacity with Macro Synthetic Fibre Reinforced Concrete.....................

    4.4.2.1 Determining Fibre Reinforced Concrete Properties.................................................

    4.4.2.2 Calculation of Residual Moment Capacity from Notched Bram Tests.....................

    4.5 Select Design Loads (Step 3).............................................................................................................

    4.5.1 Single Point Load (Step 3-1).................................................................................................

    4.5.2 Dual Point Load (Step 3-3)...................................................................................................

    4.5.3 Quadruple Point Load (Step 3-3)..........................................................................................

    4.6 Punching Shear Capacity and Ground Support..................................................................................

    4.6.1 General...................................................................................................................................

    4.6.2 Shear at Face of Loaded Area................................................................................................

    4.6.3 Shear on the Critical Perimeter..............................................................................................

    4.6.4 Loads applied through a stiff bearing (where a/l

  • 4.7.2 Shear Capacity Per Dowel....................................................................................................

    4.7.3 Bearing/Bending Capacity per Dowel...................................................................................

    4.7.4 Bursting Force Capacity of the Dowel..................................................................................

    4.8 Line Loads...........................................................................................................................................

    4.9 Uniformly Distributed Loads.............................................................................................................

    5. Construction of Ground Supported Slabs using BarChip Fibre Reinforcement..............................................

    5.1 General ...............................................................................................................................................

    5.2 Batching and Mixing..........................................................................................................................

    5.2.1 Mixing at the Batch Plant with BarChip Soluble Bags.........................................................

    5.2.2 Mixing at the Batch Plant with an Automatic Dosing Machine Using BarChip Pucks........

    5.2.3 Mixing Fibres on-site Using BarChip Soluble Bags.............................................................

    5.3 Finishing.............................................................................................................................................

    5.3.1 Finishing Techniques.............................................................................................................

    5.3.2 Joints and Joint Layout..........................................................................................................

    5.3.3 Curing.....................................................................................................................................

    6. References........................................................................................................................................................

    Appendix A – Worked Design Example.......................................................................................................................

    A.1 Design Example 1 – Point Loads on 150mm thick slab solely reinforced with BarChip 48 @ 4kg/m3................

    A1.1.1 Step 1 – Slab Properties Part 1.............................................................................................................

    A1.1.2 Step 2 – Slab Properties Part 2.............................................................................................................

    A1.1.3 Step 3 – Moment Capacities................................................................................................................

    A1.1.4 Step 4-1 – Single Point Load...............................................................................................................

    A1.1.5 Step 4-2 – Dual Point Loads................................................................................................................

    A1.1.6 Step 4-3 – Quadruple Point Loads.......................................................................................................

    A1.2 Design Example 2 – Punching Shear 150 mm thick slab solely reinforced with BarChip 48 @ 4kg/m3...........

    A1.2.1 Step 1 – Obtain Design Parameters.....................................................................................................

    A1.2.2 Step 2 – Internal Slab............................................................................................