Formwork - Paving Excavating
CONCRETE INTERNATIONALJUNE 2020 V. 42 No. 6V. 42 NO. 6Formwork30 Let ThereBe LightFORMWORKJUNE 2020
ACI Collection of Concrete Codes,Specifications, and PracticesThe American Concrete Instituteintroduces the ACI Collection ofConcrete Codes, Specifications,and Practices. With nearly 50 codesand specifications and more than200 practices—the ACI Collectionis the most comprehensive andlargest single source of informationon concrete materials, design,and construction.The ACI Collection includes ACI 318-19, ACIRegular PriceMember Price301, and ACI 562. The ACI Collection also coversconcrete materials, properties, design, construction,reinforcement, repair, structural analysis, andinnovation—plus popular topics such as slabs,formwork, masonry, and more.The ACI Collection is available in three formats—Annual OnlineSubscription(ContinuouslyUpdated) 849.00/yearGuides and Reports:FREE with ACIMembershipStandards: 259.00/yearan online subscription that is always up-to-dateand includes historic editions of codes and specifications;a USB drive for convenient digital access anywhere,with or without an internet connection; and a 549.00 1099.00 699.00USB Drivenine-volume set of books.Please visit www.concrete.org to subscribeor purchase. 899.009-Volume Bookswww.concrete.org
ACI 212.3R-10ACI University All-AccessDigital SubscriptionReport on ChemicalAdmixtures for ConcreteReported by ACI Committee 212 Access to ACI’s live webinars and over220 on-demand courses. 12-month subscription Multi-user options availableVisit www.concrete.com/store to subscribePrices as low as 99.00220 On Demand Courses Monthly Webinars Multi-User Options 55 Different Topicswww.ACIUniversity.com
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CiConcreteinternationalThe Magazine of the Concrete CommunityJUNE 2020 V. 42 No. 631FORMWORK30Let There Be Light33Open-Recipe Ultra-High-Performance Concrete39It Can Be DoneViettel Offsite Studio in Hanoi was strategically designed to let in lightand natureby Deborah R. HusoBusting the cost mythby Sherif El-Tawil, Yuh-Shiou Tai, John A. Belcher II, andDewayne RogersVan Guilder hollow-wall machines formed lasting legaciesby Rex C. Donahey and W. Agata PycALSO FEATURING19ACI Foundation Awards Student Fellowships andScholarships for 2020-2021Twenty students receive financial aid from the ACI Foundation42242526ACI Technical Committee Chairs Appointed59Concrete Q&A: Concrete Placement for Ogee Dam and TieSpacing TolerancesACI Board Committee Members ThankedPosition Statements Facilitate AdvocacyACI’s nine declarations support code development and industrycooperationby Robert J. Frosch and Stephen S. Szokewww.concreteinternational.com Ci JUNE 20203
JuneCi48Concrete internationalPUBLISHERJohn C. Glumb, tsRex C. Donahey, PErex.donahey@concrete.org7President’s MemoW. Agata Pycagata.pyc@concrete.org10News15On the MoveMANAGING EDITOR16Chapter Reports45Products & Practice48Product ShowcaseENGINEERING EDITORKeith A. Tosoltkeith.tosolt@concrete.orgEDITORRebecca NGJeff RhodesMCI USAjeff.rhodes@mci-group.comPUBLISHING SERVICESMANAGERBarry M. Bergin50 Industry FocusViettel Offsite Studio in Hanoi,Vietnam, is defined by six V-shapedstructures that open like books to a lakeand garden view. The raw, unfinishedcast-in-place concrete emulates therustic surroundings of the complex.For more details, see the article onp. 30 (photo courtesy of Vo TrongNghia Architects).53Calls for Papers54Public Discussion55 What’s New from ACI56 Meetings57Sinopsis en español58 Advertiser IndexEDITORSKaitlyn J. Dobberteen,Tiesha Elam, Hannah Genig,Angela R. Matthews,Kelli R. SlaydenGRAPHIC DESIGNERSSusan K. Esper, Ryan M. Jay,Gail L. TatumAMERICAN CONCRETE INSTITUTEhttp://www.concrete.orgTel. 1.248.848.3700Fax. 1.248.848.31504Copyright 2020 American Concrete Institute. Printed in the United States of America. All correspondence should be directed to theheadquarters office: 38800 Country Club Drive, Farmington Hills, MI 48331. Telephone: 1.248.848.3700. Facsimile (FAX): 1.248.848.3701.Concrete International (US ISSN 0162-4075) is published monthly by the American Concrete Institute, 38800 Country Club Drive,Farmington Hills, MI 48331. Periodicals postage paid at Farmington, MI, and at additional mailing offices. Concrete Internationalhas title registration with the U.S. Patent Trademark Office. Subscription rates: 185 per year payable in advance: single copyprice is 27.00 plus shipping, prepaid. POSTMASTER: send address changes to Concrete International, 38800 Country ClubDrive, Farmington Hills, MI 48331. The Institute is not responsible for the statements or opinions expressed in its publications.Institute publications are not able to, nor intended to supplant individual training, responsibility, or judgment of the user, or thesupplier, of the information presented. Permission is granted by the American Concrete Institute for libraries and other usersregistered with the Copyright Clearance Center (CCC) to photocopy any article herein for the fee of 3.00 per transaction. Payments marked ISSN 0162-4075/97 should be sent directly to the Copyright Clearance Center, 21 Congress St., Salem, MA. 01970.Copying done for other than personal or internal reference use without the express permission of the American Concrete Instituteis prohib ited. Requests for special permission or bulk copying should be addressed to the Publisher, Concrete International,American Concrete Institute. Canadian GST #126213149RTJUNE 2020 Ci www.concreteinternational.com
INCiAmerican Concrete InstituteBoard of DirectionPresidentAdditive AdvancementJeffrey W. ColemanTPast PresidentBoard Membershe ACI Materials Journal issoliciting original papers for aspecial issue on “Advances inRheology and Additive Manufacturing inConstruction” (see Call for Papers, p. 53),combining the science of deformationand flow of matter with the process ofjoining materials to make parts, usuallylayer upon layer, from 3-D model data.Based on the existing literature, I expectthat much of the issue’s content willfocus on concrete mixtures that can bepumped and extruded through a nozzle.For successful additive manufacturing,such a mixture must also be capable of:Being deposited along a defined path,creating a layer while largelyretaining its extruded shape;Bonding with the previouslydeposited layer; andResisting significant deformationunder the weight of subsequent layers.Well over 100 years ago, workersusing Van Guilder hollow-wall machineswere essentially engaged in additivemanufacturing, as they produced wallsby joining concrete mixtures layer bylayer (see p. 39). Granted, the necessary3-D models were only envisioned by theworkers, and much of the work wasaccomplished through their exertion.However, the Van Guilder system wassuccessfully used to construct hundredsof buildings. Perhaps the success can becredited to the use of concrete mixturesthat overcame the three listed rheologicaldesign challenges.Interest in additive manufacturing isincreasing. It may behoove us to look tothe past and review previous practices toconsider how old technology can beadapted for the future.Rex C. Donahey DirectorsScott M. AndersonHeather J. BrownMark A. CheekWalter H. Flood IVG. Terry HarrisMaria G. JuengerKhaled W. AwadDavid A. LangeRandall W. PostonVice PresidentsExecutive Vice PresidentCary S. Kopczynski Charles K. NmaiTechnical ActivitiesCommitteechairMichael E. KregerKimberly E. KurtisIshita ManjrekarMichael J. PaulW. Jason WeissMichelle L. WilsonRonald BurgEducational Activities Certification ProgramsCommitteeCommitteechairchairMichael C. BrownThomas M. Greenesecretarystaff liaisonFrances T. Griffithstaff liaisonMatthew R. SenecalKathryn A. AmelioJohn W. NehasilTimothy S. FolksRobert J. FroschWassim GhannoumMary Beth D. HuesteMaria G. JuengerKeith E. KesnerKamal H. KhayatCarl J. LaroscheTracy D. MarcotteBarzin MobasherAnton K. SchindlerThomas J. Van DamDiana ArboledaTara CavallineArturo Gaytan CovarrubiasWalter H. Flood IVSeamus F. FreyneJoe HugKimberly Waggle KramerRobert C. LewisJohn B. RobertsonJackie A. SempelBryan R. CastlesWilliam CiggelakisOscar DuckworthWerner K. HellmerJ. Scott KeimSteve R. Lloyd Sr.Christopher J. RobinsonXiomara SaponRobert L. VarnerWayne M. WilsonACI Staff & DepartmentsExecutive Vice President: Ronald Burg, ron.burg@concrete.orgSenior Managing Director: John C. Glumb, john.glumb@concrete.orgACI Foundation:Human Resources:Certification:Information Systems:Chapter Activities:Marketing:Engineering:Member/Customer Services:Event Services:Professional Development:Finance and Administration:Publishing @concrete.orgSustaining MembersSee pages 8-9 for a list of ACI’s Sustaining Members.To learn more about our sustaining members, visit the ACI website px.www.concreteinternational.com Ci JUNE 20205
Virtually learn the changes inACI 318-19ACI 318-19ACI has a new on-demandlearning course thatcovers the major changescontained in the100 additional pagesof the 2019 edition ofACI 318, “Building CodeRequirements for StructuralConcrete (ACI 318-19).”On-DemandCourseUThe course titled, ACI 318-19Changes to the ConcreteDesign Standard givesparticipants the mostup-to-date informationwhile allowing them to earn0.75 CEU/ 7.5 PDH credits.UNIVERSITYFor more information visit concrete.org/ACI318 1.248.848.3800 www.concrete.org #ACI318
President’sMemoA New Proposed Code StructureThe ACI Board ofDirection and TechnicalActivities Committee(TAC) have been reviewing howcodes are processed within theInstitute. Over the past year, theBoard has been discussing howACI can change to accomplishour Vision to provide theknowledge needed to useconcrete effectively for achanging world. At the sametime, TAC has been discussingJeffrey W. Colemanthe basic structure of howACI Presidentcommittees work. Thesedeliberations have resulted in a proposal for a new ACI codestructure. While details for this structure will be worked outover the next several months, I think the timing is right todiscuss the motivation for this activity.People in the construction industry certainly know of ACI.But if concrete is not their focus, they may only be familiarwith the ACI 318 Code. As we know, this only scratches thesurface of our 285 unique technical documents, of which 19are code documents (with another six code documents underdevelopment). This lack of industry recognition for the depthof ACI material that is available must change. ACI also needsto help champions of new technologies to understand howtheir information can be made visible and, if appropriate,eventually standardized.A couple of years ago, the ACI Board charged a task groupwith determining whether ACI was doing enough to codifynew technologies. The group’s discussions made it clear thatmany proponents of new technologies set their sights on beingaccepted in ACI 318, even though the Institute may have moreappropriate documents for eventually standardizing theirproduct or method. This finding indicated that ACI’s codestructure is opaque to too many people—even those in theconcrete industry—and it has highlighted the need forchanging the ways ACI organizes, presents, and markets itscode documents.Recently, in part as a result of discussions with ourindustry partner PCI, three new code-writing committees havebeen approved by TAC. One of these committees, ACI/PCI319, will focus on items unique to precast concrete structures.Another committee will focus on items unique to posttensioned concrete structures, which recently voted to becomejoint with PTI. The third committee will write a durability code,based on work by ACI Committee 201, Durability of Concrete.These committees were formed around the following coreprinciples:ACI 318 contains the backbone information for reinforcedconcrete design;New code committees will cover focused topics or industries;Committee membership will be kept small—15 membersor fewer;Committees will be placed on a schedule;Similar to ACI 318, committees will be discharged at theend of their schedule and repopulated for the next cycle; andCodes will be marketed as a suite of codes.The structure of these new committees shows how ACI isadvancing toward greater visibility of all the codes the Institutehas to offer. By building off the name recognition of ACI 318,new codes would gain better visibility and recognition as partof ACI’s suite of codes, covering not only the reinforcedconcrete buildings that ACI 318 is typically used for but alsomany other types of structures and specialized constructionmaterials and techniques. The new concept allows for a moreunderstandable structure. New industries can easily seethemselves as the next code in the set. Existing ACI codes canbe restructured for greater visibility, more efficient operations,and deadlines that meet industry needs.Other technical committees that are currently writing codesneed to be re-evaluated, including ACI Committees 350,Environmental Engineering Concrete Structures, and 440,Fiber-Reinforced Polymer Reinforcement. They both writecodes along with specifications, guides, and reports. Howthese committees operate will be an ongoing discussionbetween TAC and the committees with a focus on efficiencyin achieving ACI’s goals.TAC is also reviewing the relationship between codewriting committees and committees that write the bulk of theknowledge on a topic, known as our topic experts. It is fromthese committees that code-writing committees base theirdecisions on defining equations or limits of design. Bettercommunication is needed between the committees that set thestandard for the public and the committees that push theboundaries of a changing world.This is a bold change evolving within ACI. I can see manyvariations of this concept as it starts to unfold. Do we havemany sets of codes that fit distinctly different needs, such asnew construction, repair, fire, or resiliency? How do we handlethe overlap that will inevitably develop between differentcodes? Do our codes reference each other or are they adoptedindividually as the authorities in a locality see fit? These thingswill be hammered out over the next several months and years.Jeffrey W. Coleman, American Concrete Institute www.concreteinternational.com Ci JUNE 20207
ACI SUSTAININGThe FoundationSustaining Members show true dedicationto advancing concrete knowledge.The continued support from these organizations hasenhanced the progress of the concrete industry.www.ashfordformula.com 1.800.998.5664www.ascconline.org 1.866.788.2722www.arcosalightweight.com 1.678.777.6278With just one application, the AshfordFormula will permanently densify yourfloors, making it abrasion resistant, easyto clean and free of dust.ASCC is a nonprofit organization for castin-place concrete contractors, dedicatedto enhancing the capabilities of those whobuild with concrete, and providing them aunified voice in the industry.Arcosa Lightweight is America’s largestproducer of expanded shale and claylightweight aggregate, with operationsin California, Colorado, Texas, Louisiana,Alabama, Kentucky, Indiana, andArkansas.C O N S T R U C T I O NO R L A N D OAUSTINwww.oztec.com 1.800.533.9055www.seretta.com 1.407.290.9440Oztec Industries’ line of fullyinterchangeable steel heads andRubberHeads , electric and gasolinemotors, backpacks and flexible shafts arethe most powerful, versatile, and reliable inthe industry.Seretta Construction, established in1987, has offices in Orlando, Charlotte,and Austin. They are a full-service tiltwallcontractor capable of any size projectanywhere in the US. 1.603.953.5815North S.Tarr Concrete Consulting, P.C.,provides expert assistance with concreteissues (preventative and corrective)throughout the United States andinternationally.CHARLOTTEAdvanced Construction Technology ServicesAmerican Engineering Testing, Inc.American Society of Concrete ContractorsArcosa LightweightAsh Grove Cement CompanyBaker Concrete Construction, Inc.Barrier One, Inc.BASF Admixtures, Inc.Bentley Systems Inc.Boral ResourcesCantera Concrete CompanyCeco Concrete Construction LLCCHRYSO, Inc.Concrete Reinforcing Steel InstituteConcrete Sealants, Inc.Concrete Strategies LLCCTLGroupCurecrete Distribution, Inc.Dayton Superior CorporationDoka USA LtdEuclid ChemicalFull-Tilt Constructors, Inc.Future Tech ConsultantsGCP Applied TechnologiesKeystone Structural Concrete LLCKryton International Inc.LafargeHolcim (US) Inc.
MEMBERSof Our SuccessTo learn more about Sustaining Members,visit www.concrete.org/sustainingmembers.Read more about this month’s featuredSustaining Members in the profiles below!www.chrysoinc.com 1.800.936.7553www.daytonsuperior.com 1.888.977.9600www.doka.com 1.201.641.6500CHRYSO offers the industry’s mostinnovative and complete line of concreteadmixtures and cement additives,coupled with expert technical servicesfocused on customer success.For over 90 years, Dayton SuperiorCorporation has been a leading provider ofaccessories, chemicals, forming, shoring,and paving product solutions within thenonresidential concrete constructionindustry.Doka is a world leader in developing,manufacturing and distributing formworktechnology for use in all fields of theconstruction sector, utilizing more than160 sales and logistics facilities in over70 countries.www.spggogreen.com 1.877.957.4626www.twc-cs.com 1.517.771.8192www.xypex.com 1.800.961.4477SPG, Specialty Products Group , is anorganization formed specifically forthe purpose of supplying engineeredsustainable solutions to the constructionenvironment and the world.TWC Concrete Services, LLC, offersunmatched expertise as a subcontractorproviding their clients the total concretepackage, specializing in Tilt Ups, Flatworkand Footings to Walls, Reinforced Steel andConcrete Pumping.XYPEX Chemical Corporation is theleading manufacturer of crystallineconcrete waterproofing technology with anetwork of distributors in more than80 countries around the world.Lehigh HansonMeadow Burke Products Inc.W.R. Meadows, Inc.Metromont CorporationMunicipal Testing GroupNorth S.Tarr Concrete Consulting PCOztec Industries, Inc.Parrent Concrete LLCPenetron International LtdPhoenix IndustrialPrecast/Prestressed Concrete InstituteSaudi Building Code National CommitteeSeretta Construction Inc.Sika CorporationSpecialty Products Group, Inc.STRUCTURALStructural Services, Inc.Superior Construction ServicesTekna Chem SPATWC Concrete Services, LLCTwining Concrete InsightXypex Chemical Corp.
NewsACI Foundation Funds Research ProjectsThe ACI Foundation’s Concrete Research Council (CRC)selected eight research projects to
The ACI Collection includes ACI 318-19, ACI 301, and ACI 562. The ACI Collection also covers concrete materials, properties, design, construction, reinforcement, repair, structural analysis, and innovation—plus popular topics such as slabs
Girder Wall Formwork VARIO GT 24 Wall, column formwork RUNDFLEX and GRV Circular formwork FTF Facade formwork Shoring Systems ST 100 Stacking tower HD 200 Heavy duty prop PERI MULTIPROP The Alu prop PERI PEP Prop PEP PERI EURO-PROP Climbing Formwork KG and CB Climbing systems ACS Self climbing formwork SKS and SSC Single
6: shoring and floor loads in multi-story structures 7: design of slab, wall, beam, and column forms 8: design of form shores and bracing 9: design tables 10: formwork drawings 11: building and erecting the formwork 12: using the forms 13: formed concrete surface quality 14: formwork for architectural concrete 15: bridge formwork 16: mass .
method of concreting, geometric control, material handling etc. there are many ways a tall structure can be constructed using different formwork techniques like more than 5 stories steel formwork, steel frame with plywood formwork, aluminium formwork, plastic formwork,
System Formwork System formwork has good casting quality, speedier erection and more recycle times compared to the conventional formwork. However, the initial investment of system formwork is higher than the conventional one. Therefore, the more cycle times the system formwork is to be used, the more economical it will be.
RP Column formwork systems, steel girders till 23mm thickness BFD panel formwork Peri: Maximo, Trio quick realease mounting clamp1 Domino panel formwork Peri: Domino quick realease mounting clamp mounting plate for steel fromwork carriage VR56K3, VR57K3 cross-shaped plate3 wooden girder formwork IPE-girder
formwork method with the conventional formwork method in the construction of Integrated Laboratory of Universitas Muhammadiyah Ponorogo. The results showed that the PERI-based formwork required IDR 1.935.492.035 with duration of 25 days. Meanwhile, the conventional formwork required IDR 1.893.224.812 with duration of 57 days.
formwork is economical because of rate of return is high. The following table shows the percentage of scrap value between the various formworks presently used in the construction sites. Table 1.7 Scrap Value of Formwork . S.No Formwork Scrap value in % 1 Conventional 10% 2 Steel 30% 3 Aluminium 50% C. Time of formwork
Tools and Techniques 42-3 FORMWORK More serious are contusions from falling formwork materials. Formwork must be braced to ensure stability, especially under windy conditions. Try to avoid areas where work such as hoisting or stripping is being done overhead. Fall injuries - All of the injuries above, and many others, can result from falls.
