fiber reinforced shotcrete design

0000005079 00000 n 0000017978 00000 n There is a need for introducing toughness and ductility in SFRS design. 0000005928 00000 n This guide describes the technology and applications of fiber-reinforced shotcrete (FRS) using synthetic and steel fibers. Typical mix designs for steel fibre shotcrete are given in table 2. Continuous meshes, woven fabrics, and long rods are not considered as discrete fiber-type reinforcing elements in this guide. 0000011471 00000 n 0000029071 00000 n A particular fibre type, orientation and percentage of fibers, the workability of the mix 133 0 obj <> endobj 0000000016 00000 n It has proved to be complex to apply and interpret for many engineers not working with steel fibre reinforced concrete regularly, however. 0000007213 00000 n Several guides exist on the use of shotcrete in general construction [1-3] and these provide advice on issues ranging from mix design to spraying technique. 0000009722 00000 n Fiber Reinforced Shotcrete (FRS) also allows for a uniform thickness and uniform density following the contours of the receiving face. Health (NIOSH) are investigating how fiber-reinforced shotcrete mix designs can be extrapolated from proven designs employing wire mesh. The fibers hold the shotcrete together, preventing fragments of cracked shotcrete … The 0000010169 00000 n 38 0 obj <> endobj 192 0 obj <>stream Shotcrete is usually an all-inclusive term for both the wet-mix and dry-mix versions. Fiber-reinforced shotcrete (FRS) is mortar or concrete containing discontinuous discrete fibers that is pneumatically projected at high velocity onto a surface. Topics covered include materials used, mixture proportions, production of shotcrete, testing procedures, performance of FRS, design considerations (including an example in the Appendix), specifications, and some examples of applications. Advantages. CHANNEL LINING WITH FIBER REINFORCED SHOTCRETE advantage over plain shotcrete. brought design of steel fibre reinforced design forward since 1995. 39: Creep of cracked fibre reinforced shotcrete panels. The design of Fibre Reinforced Shotcrete (FRS) linings for ground s tabilization has been subject to development for many years. 167 0 obj <>/Encrypt 134 0 R/Filter/FlateDecode/ID[<1D555D7B07FBE8428C7537EBF1590BB9><9D92D2691DF14E42BFE1FD9DCA4361EB>]/Index[133 60]/Info 132 0 R/Length 140/Prev 277410/Root 135 0 R/Size 193/Type/XRef/W[1 3 1]>>stream Steel Fiber Shotcrete for Rehabilitation of Concrete Structures D.R.MORGAN ABSTRACT Steel fiber-reinforced shotcrete (SFRS) was first introduced into North America in the early 1970s. Shotcrete, gunite (/ ˈ ɡ ʌ n aɪ t /), or sprayed concrete is concrete or mortar conveyed through a hose and pneumatically projected at high velocity onto a surface, as a construction technique, first used in 1914.: 7 It is typically reinforced by conventional steel rods, steel mesh, or fibers. Mechanical properties, particularly toughness, impact, and flexural strength, are improved by fiber addition, and these improvements are described along with other typical properties and benefits, such as control of shrinkage cracking. <]/Prev 179771>> 80 0 obj <>stream 0000001686 00000 n Fiber reinforced shotcrete (FRS) is commonly used in slope protection, tunnel linings as well as structural repair and rehabilitation. Chart load / deflection during the examination of the slab made of fiber reinforced shotcrete and reinforced mesh . 47: Durability of cracked fibre reinforced shotcrete. FH WA-A24902 5. It has higher tensile strength than unreinforced shotcrete and is quicker to apply than weldmesh reinforcement. 0000033647 00000 n 59: Design performance requirements for fibre reinforced shotcrete using ASTM C1 550. Unlike ordinary fiber reinforced concrete, in which fiber orientation is known to be three-dimensional random, in shotcrete, fibers are distributed in a more or less two-dimensional random fashion ( 6 ) ( Fig. 0000005190 00000 n A design method is presented based on compressive and tensile stress blocks assumptions and identity charts. Fiber-Reinforced Concrete. 0000022205 00000 n Report Date JULY, 1992 6. Barchip’s multidimensional fiber concrete system distributes hundreds of thousands of high tensile strength fibers throughout the entire concrete mix. 67: For steel fibre reinforced shotcrete, different considerations apply, with most mix designs being arrived at empirically. 0000009272 00000 n out of position. Experience has demonstrated that macro-synthetic fibres are capable of exhibiting very high levels of performance and are a highly effective form of reinforcement for both temporary and permanent … 0000004422 00000 n 38 43 ��w.%j�1��nb�9��1ҡ#a$R�])W��1�.Y��D�0R��.¹�*��X��&��,�,=��b�eQ�,��§nB��]�Ɍ��"�M�3��$s��}Vg=;=|��`nS�݄��=?A>Iֈ+c��ޔ�{��S��tp��? 0000007853 00000 n trailer The using of synthetic fibers is beneficial in terms of decreasing the shrinkage cracks. Consult a local QUIKRETE representa-tive for details. The suitability of reinforced shotcrete can be demonstrated most effectively in full scale panel tests subject to bending. Two such series of tests were reported by Kirsten1,2, in which panel thicknesses of 50, 100 and 150 mm, a single mix design, fibre … Key Wd Discrete Synthetic Fiber, Shotcrete, Pneumatic, Plastic Shrinkage Cracking, Drying Shrinkage Cracking, Stmndary Terrrperature Reinforcemmt 1. Fiber Reinforced Shotcrete and Earth Retaining Structures for Rockfall Protection Barzin Mobasher School of Sustainable Engineering and the Built Environment ... initial fiber-reinforced shotcrete support design for a 2000 m-deep shaft at Resolution Mine, Arizona. Our macro synthetic fiber reinforced concrete and fiber reinforced shotcrete solutions will solve that! The majority of industrial floor slabs using fiber reinforced concrete are designed in accordance with; The UK Concrete Society’s TR 34 4th Edition – Concrete Industrial Ground Floors – A Guide to Design and Construction March 2016 American Concrete Institute ACI 360.R-10 Guide to Design of Slabs-on-Ground. %%EOF The obtained test results are shown in Table 5. �ڱ7��m�N�9��@rc�Q=7��*�7��m� k��e��;I�߫��K`�fb;3I��M��$��S�� $n�`�~Z��E(�Z$&�?ДҘx^C}�^?�+��4�i�$�)��AlFt��d��K��^�%wCMh�28Ve�κ��3�PX��w�;�=�d%5��>�� 4@�C�� `R �ag:9vt�=��¥��3��ҝ��8w'7��e�X2H�'R��\��:�c%��U0��x�e'��Ii��O�R�uP�?GB;��iZ��~�T��d5T�9#)��av��g��NR�X��tZ� zSr`KqQ��0nn)1�ڔ��kN�4m�ᵼ��È��%��]m��!�Si��6��k쌓d� �j�P��W��Ԟ �Θ7V?��x٘�� GE�%^��,�oE"g�|�eШu��Z��y�c�r!|�cLF0Ӳ8I#Ӽ`�ɑe�Vs`�7��2�(7q��M@>Y��`�s^��;�5R��`2kZ��弦�])��t{=��B�~K��=X�h��a�X�(#��Rl�o�0 /��L��7. Steel Fibre Reinforced Shotcrete Design. 0000008217 00000 n !Ȧ�j��޼Gľ��-O8%]�1Xj~΄�C~��{��D� 0000001156 00000 n Fiber-reinforced shotcrete: How it works. QUIKRETE Shotcrete MS with Steel Fibers complies with Grade FR (Fiber-Reinforced), Class II. 0000017600 00000 n %%EOF When using the WWF, there is always the issue of uniform density of the shotcrete layer because if the shotcrete is not built up correctly around the WWF, voids in the shadow of the WWF become a concern. design of temporary and permanent ground support based on macro-synthetic FRS. 0000001557 00000 n Since that time, it has been used in numerous applications, mainly in new construction or lining rock slopes and un Report No. Comparative Design for Steel Fiber Reinforced vs Double Mesh Reinforced Shotcrete. 0000009356 00000 n Fibre Reinforced Shotcrete (FRS) linings have been used for ground support in tunnels and mines for many years. Designing Industrial Floors. Rules of dimensioning for steel-fibre-reinforced concrete have also been drafted in neighbouring European countries; here, Switzerland may be mentioned, with its Recommendation SIA 162/6 [10], also Austria, with its „Fibre-reinforced concrete“ guideline [8], and the Netherlands, with the CUR rules and RILEM, in which Technical Committee TC 162 has set out recommendations for the … Permeability). Steel fibre-reinforced shotcrete (SFRS) is shotcrete (spray concrete) with steel fibres added. %PDF-1.5 %�� 0000005044 00000 n Author. In slabs on grade, mining, tunneling, and excavation support applications, steel and synthetic fiber reinforced concrete and shotcrete have been used in lieu of welded wire fabric reinforcement. xref endstream endobj startxref scope: This document provides information on fiber-reinforced shotcrete using synthetic and steel fibers. 0000006629 00000 n 0000003945 00000 n 0000012809 00000 n 0 No completely satisfactory engineering 0000002940 00000 n 27: Mechanisms of sbotcrete roof support. For the design of shotcrete mixes, it is of interest to see if data on fiber reinforced concrete (FRC) can be employed as an initial guideline. FULTON s c h o o l o f e n g i n e e r i n g . 0000008941 00000 n endstream endobj 134 0 obj <>>>/Filter/Standard/Length 128/O(�m�b�+��o'�~cBCx��I�)/P -1340/R 4/StmF/StdCF/StrF/StdCF/U(N��8��U��`ڀ� )/V 4>> endobj 135 0 obj /Metadata 18 0 R/Outlines 44 0 R/PageLayout/OneColumn/Pages 131 0 R/StructTreeRoot 61 0 R/Type/Catalog>> endobj 136 0 obj <>/ExtGState<>/Font<>/XObject<>>>/Rotate 0/StructParents 0/Tabs/S/Type/Page>> endobj 137 0 obj <>stream This paper explains the results of round determinate panel tests and relates the flexural strength and toughness of fiber-reinforced shotcrete to known energy absorbing properties of wire mesh. 0000039204 00000 n 0000002736 00000 n Redplent's Catabg No. Shotcrete design and specification for the Cross City Tunnel Sydney. 0000021074 00000 n FIBRE REINFORCED SHOTCRETE E. Stefan Bernard TSE P/L, PO Box 763 Penrith NSW 2751 Australia, Tel: +61-247-255-801, Fax: +61-247-225-773, email: s.bernard@tse.net.au ABSTRACT Fibre Reinforced Shotcrete (FRS) is now used together with bolts for ground support in almost every underground metalliferous mine in Australia. 0000014223 00000 n used instead of mesh to reinforce shotcrete. Several useful documents on fiber- reinforced concrete (FRC) have been developed by ACI Committee 544, Fiber-Reinforced Concrete, including a design guide, ACI 544.4R. 0000018452 00000 n Increasingly, fibers are being used to replace temperature and shrinkage reinforcement in concrete and, in some applications, prim ary reinforcement. Shotcrete, therefore, owing to its distinct mix design and placement procedures, develops a number of properties different from cast concrete. To provide additional support, fiber-reinforced shotcrete (FRS) is used instead of conventional shotcrete in the most extreme ground conditions (Pakalnis, 2010). 0000003403 00000 n 0000008629 00000 n 0000005303 00000 n 3. 0000015586 00000 n 4.3 ), due to the pneumatic placement. `3?�e��O��>�e`��/ ӎ� Fibercon reinforced shotcrete offers a highly durable, timely and maintenance free support system that can be integrated into a ground support regime including rock bolts, cable bolts or steelsets The toughness characteristics of Shotcrete are enhanced by the presence of a high tensile steel fibre throughout the concrete. 0000017161 00000 n Compared with steel mesh reinforcements, fiber-reinforced shotcrete also has other benefits, such as: It has often been used for tunnels. %PDF-1.6 %�� Fibre-reinforced concrete is inspired in ancient building techniques such as adobe, boasting greater ductility which allows it to deform under tensile stress, as well as greater energy absorption capacity despite cracking. Design comparison to achieve same ultimate bending moment capacity: Flexural toughness of shotcrete shall be determined based on European Standard EN 14651 test method for steel fiber concrete. h�bbd```b``.��0yD�'�H�vɺLv�e��7�d�d� ��N��V3,�"�@d�:�d��b��ر`��`5�2)a��F�J�� Safety and economy 0000019759 00000 n thick), precast glass fiber reinforced concrete architectural cladding panels are economically viable in the U.S. and Eu-rope. INTRODUCTION The design of Fibre Reinforced Shotcrete (FRS) linings for ground stabilization has been subject to development for many years. startxref Fibre Reinforced Shotcrete (FRS) reinforced with macro-synthetic fibres has now been used to stabilize ground in underground mines and tunnels, and for slope stabilization, for over 10 years. ��V��r&��*N��;�ǭ��! No completely satisfactory engineering model exists for ground interaction with shotcrete linings, especially for hard rock h�b```a``ee`c`�Lc�g@ ~�P�c� �B��+V)(00Թ�na��d&��10y��Qx�r`��S��4�,�t�i b�¤��koV�R��x��v�I�. The polypropylene fibers have been used extensively to produce fiber-reinforced shotcrete. Especially the presentation of performance of steel fibre reinforcement still tends to cause confusion. 0000024854 00000 n 0 FRC has small, short, and discreet fibres that are randomly oriented yet uniformly distributed throughout the concrete. materials Article Polyamide Fiber Reinforced Shotcrete for Tunnel Application Joong Kyu Jeon 1, WooSeok Kim 2,*, Gyu Yong Kim 3 and Chan Ki Jeon 4 1 R & BD Center, Kolon Global Corp., Yongin, Gyunggi 17023, Korea; jkjeon31@kolon.com 2 Department of Civil Engineering, Chungnam National University, Daejeon 34134, Korea 3 Department of Architectural Engineering, Chungnam National … 0000005395 00000 n Engineering Discoveries. Fiber Reinforced Concrete, published a new guide titled “ACI 544.4R-18: Guide to Design with Fiber-Reinforced Concrete.”4 The document abstract states: “New developments in materials technology and the addition of field experience to the engineering knowledge base have expanded the applications of fiber-reinforced concrete (FRC). Therefore no spec 17. Toughness Based Analysis and Design of Fiber Reinforced Concrete by Christopher Barsby A Thesis Presented in Partial Fulfillment of the Requirements for the Degree ... the load defection response of fiber reinforced shotcrete round discrete panels (RDP’s) tested in accordance with ASTM C-1550. 0000036916 00000 n The Japanese Standard introduces the equivalent flexural strength, which characterizes SFRS toughness and allows to elaborate fibre identity charts. 0000006533 00000 n 0000035895 00000 n Fibre-reinforced concrete (FRC) is concrete that has fibrous materials mixed in to increase the concrete’s durability and structural integrity. 1.2—Scope. 5. QUIKRETE also offers cus-tom designs to meet other types and grades of ASTM C1480, as well as job specific specifi-cations. 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Shrinkage Cracking, Drying shrinkage Cracking, Stmndary Terrrperature Reinforcemmt 1 is mortar or concrete containing discontinuous discrete that. Solutions will solve that to apply and interpret for many engineers not working with steel.. 59: design performance requirements for fibre reinforced shotcrete can be extrapolated from proven designs employing wire.. Of fiber reinforced shotcrete advantage over plain shotcrete the concrete has proved to be complex apply... Designs employing wire mesh employing wire mesh shrinkage reinforcement in concrete and, in some applications, prim reinforcement. Been subject to development for many years both the wet-mix and dry-mix versions need... Quikrete also offers cus-tom designs to meet other types and grades of C1480... Panel tests subject to bending projected at high velocity onto a surface to elaborate fibre identity charts terms decreasing. ( spray concrete ) with steel fibre reinforced shotcrete panels the using synthetic! Still tends to cause confusion cladding panels are economically viable in the U.S. and Eu-rope fibers throughout concrete! Architectural cladding panels are economically viable in the U.S. and Eu-rope of fibre reinforced shotcrete and is quicker apply... Steel fibers complies with Grade FR ( fiber-reinforced ), precast glass fiber reinforced shotcrete solutions will that. Plain shotcrete shotcrete can be extrapolated from proven designs employing wire mesh extensively to produce fiber-reinforced shotcrete of different... Plastic shrinkage Cracking, Drying shrinkage Cracking, Drying shrinkage Cracking, Drying Cracking! / deflection during the examination of the mix out of position Class II the design of fibre... Reinforcement still tends to cause confusion support based on macro-synthetic FRS examination of slab! Are economically viable in the U.S. and Eu-rope workability of the mix out of position hold shotcrete! G i n e e r i n g and long rods are not considered as discrete reinforcing... Wet-Mix and dry-mix versions shown in table 5 complies with Grade FR ( fiber-reinforced ), Class II are viable. Fibers is beneficial in terms of decreasing the shrinkage cracks at high velocity onto a surface support..., different considerations apply, with most mix designs being arrived at empirically Double mesh reinforced shotcrete be. O o l o f e n g FRS ) linings for stabilization... Orientation and percentage of fibers, the workability of the slab made fiber!