• Sustainable shotcrete mix-designs for tunnels with longer ...

    Nov 16, 2020· One of the most important support measures in tunnel construction is the use of shotcrete, also known as sprayed concrete. In this application, concrete is applied via a nozzle and, depending on requirements, admixtures are added. Mix-designs for shotcrete have so far been based on experience and practical knowledge.

  • Viability and Durability of Shotcrete for Repairing Bridges

    Contractors quite often use the dry-mix shotcrete method, especially for small repairs. MoDOT should require pre-bagged mixes for dry-mix shotcrete because it makes a more consistent mix. The pre-bagged mix should include silica fume in order to make the mix stickier and provide better bond strength. Usually not included in a dry mix, an air

  • Durability of dry-mix shotcrete using supplementary ...

    Durability of dry-mix shotcrete using supplementary cementitious materials Julie Armengauda, Martin Cyrb, Géraldine Casaux-Ginestetb,⇑, Bernard Hussonb a NGE Fondations, NGE Group, Research & Development Department, France bLMDC, Université de Toulouse, UPS, INSA, Toulouse, France highlights Dry-mix shotcrete has a higher porosity than ordinary concrete.

  • Shotcrete Testing— Who, Why, When, and How

    the shotcrete mixture, particularly in dry­mix shotcrete. Many factors, however, including admixtures, aggregate, and shotcrete placing, can affect the porosity of shotcrete, so it should not be considered an absolute measure of shotcrete quality. When required, the …

  • Durable Concrete: The Future and Use of Supplementary ...

    Durable Concrete: The Future and Use of Supplementary Cementitious Materials METAKAOLIN Presented By A.J. Marisca, Regional Sales Manager, BASF KAOLIN 3/1/2017 1 ia Concrete Conference March 2-3, 2017

  • Safe re-entry time with In-Cycle Shotcrete for support of ...

    The shear strength of shotcrete pastes without chemical accelerator can be determined using a standard vane shear test apparatus such as a viscometer (VT550) from 0 to 3 hours curing. During th period the hydration products in the shotcrete pasteis s are in the fluid gel state.

  • Sustainable shotcrete mix-designs for tunnels with longer ...

    achieve particularly high durability. Optimized mix-design One main finding is that shotcrete can be designed more durable when cements, supplementary …

  • ASTM International - Journal of Cement, Concrete and ...

    Factors Affecting the Durability of Concrete and the Benefits of Using Blast-Furnace Slag Cement. Soundness Testing and Durability of Coarse Aggregates in Concrete. Studies of the Hydraulic Properties of Belite Middling Slime. The Uniformity and Influence of Silica Fume from a U.S. Source on the Properties of Portland Cement Concrete

  • Advances in Shotcrete Technology | Concrete | Dam

    Advances in Shotcrete Technology. for Infrastructure Rehabilitation by Dudley R. Rusty Morgan This paper was rst presented at the Concrete Institute of Australia, 22nd Biennial Conference, Concrete 05, Melbourne, October 17-19, 2005, and is republished with their authorization.. he shotcrete process was first developed in 1907 by Carl Akeley for the purpose of repairing the faade of the Field ...

  • Shotcrete: Engineering Developments - 1st Edition - E.S ...

    Jan 01, 2001· Table of Contents. Preface -- Acknowledgements -- Keynote papers -- Fracture toughness of fiber reinforced shotcrete: issues and challenges /N.Banthia -- Modern advances and applications of sprayed concrete /T.A.Melbye & R.H.Dimmock -- Other papers -- Dynamically loaded young shotcrete linings /A.Ansell & I.Holmgren -- A Double Anchored (DD) steel fibre for shotcrete /N.Banthia & …

  • REPUBLIC OF THE PHILIPPINES Ff OFFICE OF THE SECRETARY …

    For dry mix, ajob sitewater storagetank shall be provided. Itshall be provided with a positive displacement pump with a regulating valve that is accurately controlled to provide water at the required pressure andvolume. b. Mixing Equipment capable of handling and applying shotcrete containing

  • Sustainable shotcrete mix-designs for tunnels with longer ...

    Nov 17, 2020· The use of shotcrete is one of the most important support measures in tunnel construction. ... One main finding is that shotcrete can be designed more durable when cements, supplementary ...

  • Durability performance of dry-mix shotcrete produced with ...

    The purpose of this research is to study the effect of replacing natural coarse aggregates with coarse recycled concrete aggregates on shotcrete's durability performance. The dry-mix process was ...

  • SHOTCRETE, FIBRE-REINFORCED - Alberta

    B375 Fibre-Reinforced Shotcrete, Repair of SPCSP Culverts qualifies under this section. CEMENT . Normal Portland Cement, Type 10: conforming to the current CSA/CAN3-A5. SILICA FUME. Silica fume shall meet all the requirements for Type U material, as specified in CAN/CSA-A23.5 Supplementary Cementing Materials. FINE AGGREGATE

  • Mechanisms of placement and stability of dry process shotcrete

    DOI: 10.14288/1.0064138 Corpus ID: 135896176. Mechanisms of placement and stability of dry process shotcrete @inproceedings{Jolin1999MechanismsOP, title={Mechanisms of placement and stability of dry process shotcrete}, author={M. Jolin}, year={1999} }

  • สมาคมคอนกรีตแห่งประเทศไทย

    Reactivity tests for supplementary cementitious materials By Asst. Prof. Prannoy Suraneni, American Concrete Institute (ACI) ... South East Asia Drymix Mortar Association (SEADMA) 17.30 – 19.30 น. ... MAT-007 DURABILITY OF MARGINAL LATERITIC SOIL IMPROVED BY FLY ASH GEOPOLYMER FOR RAILWAY EMBANKMENT

  • (PDF) PROCESS DEPENDENCE OF FIBER REINFORCED SHOTCRETE ...

    This report compares and contrasts the effects of process on the performance of fiber reinforced shotcrete. Using Optimet ® steel fibers for reinforcement, the paper discusses the causes for the higher penetration resistance in dry-mix shotcrete,

  • Best Practices of Using Shotcrete for Wall Fascia and ...

    Shotcrete has become attractive and holds potential to replace cast-in-place (CIP) concrete for elements like retaining walls and slope stabilization. However, this practice is still limited due to concerns of drying shrinkage cracking, long-term durability, and debonding from reinforcing bars or existing structures.

  • **********************************************************

    Dry-mix shotcrete is shotcrete in which most of the mixing water is added at the nozzle. Dry-mix is commonly used for placing mixtures containing lightweight aggregates or refractory materials. Wet-mix shotcrete is shotcrete in which all the ingredients, including water, are mixed before introduction into the delivery hose; compressed air

  • Developments in Shotcrete for Repairs and Rehabilitation ...

    Sep 01, 1991· This shotcrete has good volume stability, good freeze-thaw durability, and very low chloride permeability. Silica fume usage also made some progress in the 1980s. Research done in 1983 showed even more pronounced benefits when silica fume was used in dry-mix shotcrete than when it was used in wet-mix shotcrete.

  • Durability of dry-mix shotcrete using supplementary ...

    This work focuses especially on the durability of dry-mix shotcrete containing supplementary cementitious materials (SCM) with different aggregate size distributions. The use of SCM in dry-mix shotcrete aims at limiting rebound, reducing the carbon footprint of the binder and enhancing durability.

  • U. S. Departmentof the Interior

    SUPPLEMENTARY NOTES Microfiche or hard copy available at the E&R Center, Denver, Colorado ... creased compressive strength and durability in freeze-thaw and wet-dry tests. Sodium citrate ... For specimens formed pneumatically using laboratory shotcrete equipment, unit weights and compressive strengths of soil, fly ash, ...

  • (PDF) Durability Assessment of Tunnels | Frank Papworth ...

    Durability Assessment of Tunnels Frank Papworth1 and Marton Marosszeky2 1 BCRC (WA) 2BCRC (NSW) Synopsis: The paper provides background to the durability assessment of four very different tunnels: a) For a fibre reinforced shotcrete road tunnel lining permeability of the shotcrete …

  • (PDF) Process dependence of shotcrete for repairs | VIVEK ...

    240 Int. J. Materials and Product Technology, Vol. 23, Nos. 3/4, 2005 Process dependence of shotcrete for repairs Vivek Bindiganavile* Department of Civil and Environmental Engineering, University of Alberta, 3-020, Markin/CNRL-NREF Bldg., Edmonton, AB, T6G 2W2, Canada Fax: 780 492 0249 E-mail: [email protected] *Corresponding author Nemkumar Banthia Department of Civil …

  • Sustainable shotcrete mix-designs for tunnels with longer ...

    Nov 16, 2020· One of the most important support measures in tunnel construction is the use of shotcrete, also known as sprayed concrete. In this application, concrete is applied via a nozzle and, depending on requirements, admixtures are added. Mix-designs for shotcrete have so far been based on experience and practical knowledge.

  • Viability and Durability of Shotcrete for Repairing Bridges

    Contractors quite often use the dry-mix shotcrete method, especially for small repairs. MoDOT should require pre-bagged mixes for dry-mix shotcrete because it makes a more consistent mix. The pre-bagged mix should include silica fume in order to make the mix stickier and provide better bond strength. Usually not included in a dry mix, an air

  • Durability of dry-mix shotcrete using supplementary ...

    Durability of dry-mix shotcrete using supplementary cementitious materials Julie Armengauda, Martin Cyrb, Géraldine Casaux-Ginestetb,⇑, Bernard Hussonb a NGE Fondations, NGE Group, Research & Development Department, France bLMDC, Université de Toulouse, UPS, INSA, Toulouse, France highlights Dry-mix shotcrete has a higher porosity than ordinary concrete.

  • Shotcrete Testing— Who, Why, When, and How

    the shotcrete mixture, particularly in dry­mix shotcrete. Many factors, however, including admixtures, aggregate, and shotcrete placing, can affect the porosity of shotcrete, so it should not be considered an absolute measure of shotcrete quality. When required, the …

  • Durable Concrete: The Future and Use of Supplementary ...

    Durable Concrete: The Future and Use of Supplementary Cementitious Materials METAKAOLIN Presented By A.J. Marisca, Regional Sales Manager, BASF KAOLIN 3/1/2017 1 ia Concrete Conference March 2-3, 2017

  • Safe re-entry time with In-Cycle Shotcrete for support of ...

    The shear strength of shotcrete pastes without chemical accelerator can be determined using a standard vane shear test apparatus such as a viscometer (VT550) from 0 to 3 hours curing. During th period the hydration products in the shotcrete pasteis s are in the fluid gel state.

  • Sustainable shotcrete mix-designs for tunnels with longer ...

    achieve particularly high durability. Optimized mix-design One main finding is that shotcrete can be designed more durable when cements, supplementary …

  • ASTM International - Journal of Cement, Concrete and ...

    Factors Affecting the Durability of Concrete and the Benefits of Using Blast-Furnace Slag Cement. Soundness Testing and Durability of Coarse Aggregates in Concrete. Studies of the Hydraulic Properties of Belite Middling Slime. The Uniformity and Influence of Silica Fume from a U.S. Source on the Properties of Portland Cement Concrete

  • Advances in Shotcrete Technology | Concrete | Dam

    Advances in Shotcrete Technology. for Infrastructure Rehabilitation by Dudley R. Rusty Morgan This paper was rst presented at the Concrete Institute of Australia, 22nd Biennial Conference, Concrete 05, Melbourne, October 17-19, 2005, and is republished with their authorization.. he shotcrete process was first developed in 1907 by Carl Akeley for the purpose of repairing the faade of the Field ...

  • Shotcrete: Engineering Developments - 1st Edition - E.S ...

    Jan 01, 2001· Table of Contents. Preface -- Acknowledgements -- Keynote papers -- Fracture toughness of fiber reinforced shotcrete: issues and challenges /N.Banthia -- Modern advances and applications of sprayed concrete /T.A.Melbye & R.H.Dimmock -- Other papers -- Dynamically loaded young shotcrete linings /A.Ansell & I.Holmgren -- A Double Anchored (DD) steel fibre for shotcrete /N.Banthia & …

  • REPUBLIC OF THE PHILIPPINES Ff OFFICE OF THE SECRETARY …

    For dry mix, ajob sitewater storagetank shall be provided. Itshall be provided with a positive displacement pump with a regulating valve that is accurately controlled to provide water at the required pressure andvolume. b. Mixing Equipment capable of handling and applying shotcrete containing

  • Sustainable shotcrete mix-designs for tunnels with longer ...

    Nov 17, 2020· The use of shotcrete is one of the most important support measures in tunnel construction. ... One main finding is that shotcrete can be designed more durable when cements, supplementary ...

  • Durability performance of dry-mix shotcrete produced with ...

    The purpose of this research is to study the effect of replacing natural coarse aggregates with coarse recycled concrete aggregates on shotcrete's durability performance. The dry-mix process was ...

  • SHOTCRETE, FIBRE-REINFORCED - Alberta

    B375 Fibre-Reinforced Shotcrete, Repair of SPCSP Culverts qualifies under this section. CEMENT . Normal Portland Cement, Type 10: conforming to the current CSA/CAN3-A5. SILICA FUME. Silica fume shall meet all the requirements for Type U material, as specified in CAN/CSA-A23.5 Supplementary Cementing Materials. FINE AGGREGATE

  • Mechanisms of placement and stability of dry process shotcrete

    DOI: 10.14288/1.0064138 Corpus ID: 135896176. Mechanisms of placement and stability of dry process shotcrete @inproceedings{Jolin1999MechanismsOP, title={Mechanisms of placement and stability of dry process shotcrete}, author={M. Jolin}, year={1999} }

  • สมาคมคอนกรีตแห่งประเทศไทย

    Reactivity tests for supplementary cementitious materials By Asst. Prof. Prannoy Suraneni, American Concrete Institute (ACI) ... South East Asia Drymix Mortar Association (SEADMA) 17.30 – 19.30 น. ... MAT-007 DURABILITY OF MARGINAL LATERITIC SOIL IMPROVED BY FLY ASH GEOPOLYMER FOR RAILWAY EMBANKMENT

  • (PDF) PROCESS DEPENDENCE OF FIBER REINFORCED SHOTCRETE ...

    This report compares and contrasts the effects of process on the performance of fiber reinforced shotcrete. Using Optimet ® steel fibers for reinforcement, the paper discusses the causes for the higher penetration resistance in dry-mix shotcrete,

  • Best Practices of Using Shotcrete for Wall Fascia and ...

    Shotcrete has become attractive and holds potential to replace cast-in-place (CIP) concrete for elements like retaining walls and slope stabilization. However, this practice is still limited due to concerns of drying shrinkage cracking, long-term durability, and debonding from reinforcing bars or existing structures.

  • **********************************************************

    Dry-mix shotcrete is shotcrete in which most of the mixing water is added at the nozzle. Dry-mix is commonly used for placing mixtures containing lightweight aggregates or refractory materials. Wet-mix shotcrete is shotcrete in which all the ingredients, including water, are mixed before introduction into the delivery hose; compressed air

  • Developments in Shotcrete for Repairs and Rehabilitation ...

    Sep 01, 1991· This shotcrete has good volume stability, good freeze-thaw durability, and very low chloride permeability. Silica fume usage also made some progress in the 1980s. Research done in 1983 showed even more pronounced benefits when silica fume was used in dry-mix shotcrete than when it was used in wet-mix shotcrete.

  • Durability of dry-mix shotcrete using supplementary ...

    This work focuses especially on the durability of dry-mix shotcrete containing supplementary cementitious materials (SCM) with different aggregate size distributions. The use of SCM in dry-mix shotcrete aims at limiting rebound, reducing the carbon footprint of the binder and enhancing durability.

  • U. S. Departmentof the Interior

    SUPPLEMENTARY NOTES Microfiche or hard copy available at the E&R Center, Denver, Colorado ... creased compressive strength and durability in freeze-thaw and wet-dry tests. Sodium citrate ... For specimens formed pneumatically using laboratory shotcrete equipment, unit weights and compressive strengths of soil, fly ash, ...

  • (PDF) Durability Assessment of Tunnels | Frank Papworth ...

    Durability Assessment of Tunnels Frank Papworth1 and Marton Marosszeky2 1 BCRC (WA) 2BCRC (NSW) Synopsis: The paper provides background to the durability assessment of four very different tunnels: a) For a fibre reinforced shotcrete road tunnel lining permeability of the shotcrete …

  • (PDF) Process dependence of shotcrete for repairs | VIVEK ...

    240 Int. J. Materials and Product Technology, Vol. 23, Nos. 3/4, 2005 Process dependence of shotcrete for repairs Vivek Bindiganavile* Department of Civil and Environmental Engineering, University of Alberta, 3-020, Markin/CNRL-NREF Bldg., Edmonton, AB, T6G 2W2, Canada Fax: 780 492 0249 E-mail: [email protected] *Corresponding author Nemkumar Banthia Department of Civil …