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Taking the Mystery out of Mix Design in Part 1 of 2, Ken Hover Covers the Three Factors That Defi Ne a Concrete Mix

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Taking the Mystery out of Mix Design in Part 1 of 2, Ken Hover Covers the Three Factors That Defi Ne a Concrete Mix INSIDE: CONCRETE SURFACES November/December 2019 An Offi cial Magazine of World of Concrete Taking the Mystery Out of Mix Design In Part 1 of 2, Ken Hover covers the three factors that defi ne a concrete mix. Pg 19 Pumping Dry Materials Pg 29 Installing a Thermal Break Pg 35 ONE-PASS POWERHOUSES When it comes to slab-on-grade, we’re talkin’ serious work ethic. Our award-winning boomed screeds are designed to help you do more with less. Make major efficiency gains ® on the projects where quality and reliability matter most. Come see these and our full line of Laser Screed® Machines at World of Concrete 2020 - BOOTH C5303. ® WWW.SOMERO.COM Get it Done. Get a Somero. or call 239.210.6519 CONTENTS November/December 2019 / Volume 64 / Number 7 19 Photo: Votorantim Cimentos/Prairie Materials FEATURES DEPARTMENTS 19 Taking the Mystery Out of Mix Design 5 Insider Information CS-41 Tie a Yellow Ribbon Learn how the various ingredients in a Come to WOC Again Sometimes the concrete mix come together in Part 1 of this only way to fi x two-part article. 10 Projects That Rock a bad polishing job A Formwork Challenge is to start over. 29 Material Placement Made Easy Fill and subgrade materials can be air-pumped 12 Business CS-45 Getting Consistent into inaccessible locations. Your Company’s Culture is Critical Results on Polished Concrete Overlays 35 Insulating Concrete Balconies 16 Uncommon Sense Follow these three steps for Structural thermal breaks are increasingly Leading Our Laborers a successful installation. used to save energy and eliminate cold fl oors, condensation, and mold growth. 56 Innovation Can Innovation Solve the Labor Shortage? IN THE NEXT ISSUE OF CONCRETE • The Most Infl uential People in the industry, plus Four Under Forty • Robotics in Concrete Construction CONSTRUCTION • Keeping Concrete Mixes Pumpable ON THE COVER: Designing concrete mixes is a balancing act between achieving the hardened properties of strength and durability while still having a placeable, workable mix. Photo: Votorantim Cimentos / Prairie Materials CONCRETE CONSTRUCTION (ISSN1533-7316) is published 6 times per year (January, April, May/June, July/August, September/October, November/December) and once digitally (February/March) and is copyrighted ©2019 by Hanley Wood, 1152 15th Street NW, Suite 750, Washington, DC 20005. Postmaster: Send address changes to Concrete Construction, PO Box 3494, Northbrook, IL 60065 Canada Post Registration #40612608/G.S.T. number: R-120931738. Canadian return address: IMEX, PO Box 25542, London, ON N6C 6B2. Technician Aggregate Testing Technician Aggregate/Soils Base Technician Concrete Construction Construction Special Inspector Concrete Quality Technical Manager Concrete Transportation Special Inspector Tilt-Up Supervisor Tilt-Up Technician Shotcrete Nozzleman Shotcrete Nozzleman- in-Training Masonry Field Testing Technician Masonry Laboratory Testing Technician Adhesive Anchor Installer Field Testing Technician Flatwork Finisher Specialty Commercial/Industrial Finisher Specialty Commercial/Industrial Technician Strength Testing Technician Laboratory Testing Technician Aggregate Testing Technician Aggregate/Soils Base Technician Concrete Construction Special Inspector Field Testing Concrete Quality Technical Manager Concrete Transportation Special Inspector Tilt-Up Supervisor Tilt-Up Technician Shotcrete Nozzleman Shotcrete Nozzleman-in-Training Masonry ch Flatwork Finisher nician Masonry Laboratory Testing Technicia Adhesive Anchor Installer Field Testing Technician Flatwork FinisherACI Specialty CERTIFICATION Commercial/Industrial Finisher Specialty Commercial/Industria Technician Strength Testing Technician Laboratory Testing Technician Aggregate Testing Technician Aggregate/Soils Base Technician Concrete Construction Special Inspector Base Technician Transportation Special Inspector ConcretePROGRAMS Transportation Special Inspector Tilt-Up Supervisor Tilt-Up Technician Shotcrete Nozzleman Shotcrete Nozzleman-in-Training Masonry Field Testing Technician Masonry Laboratory Testing Technicia Adhesive Anchor Installer Field Testing Technician Flatwork isher Shotcrete her Commercial/Industrial Finisher Specialty Commercial/Industrial Technician Strength TesNozzlemanian Laboratory Testing Technician Aggregate Testing Technician Tilt-Up Soils Base Technician Concrete Construction Special Inspector Associate Concrete TransSupervisor Inspector Concrete Transportation Special Inspector Tilt-Up Supervisor Tilt-Up Technician Shotcrete Nozzleman Shotcrete Nozzleman-in-Training Masonry Field Testing Technician Masonry Laboratory Testing Technician FF vvv Adhesive Anchor Installer Field Testing Technician Flatwork ty Strength Specialty ialty Commercial/Industrial Finisher Specialty Commercial/Industrial Technician Strength Testing Technician Concrete Testing Technician Aggregate Testing Technician Aggregate/Soils Base Technician ete Construction Special Inspector Concrete Quality Technical Manager Concrete nician Special Special Inspector Tilt-Up Supervisor Tilt-Up Technician Shotcrete Nozzleman Field Testing otcrete Inspectoran-in-Training Masonry Field Testing Technician Masonry Laboratory TTesting Technician Adhesive Anchor InstallerWith Field 26 Testingprograms Technician (and several Flatwork more in development), Finisher Specialty the Commercial/Industrial Finisher Specialty Commercial/IndustrialAmerican Concrete Technician Institute has Strengtha certification Testing program Technician to Laboratory Testing Tilt-Up Aggregate Testingsatisfy anyTechnician number of Aggregate/Soils concrete specialties Base that Technicianyou’ve been Concrete Construction ecial Technicianssociatethinking Concrete about. Transportation Offering certifications Special around Inspector the world Concrete Transportation since 1980; learn how you can become ACI certified at Special Inspector Tilt-Up Supervisor Tilt-Up Technician Shotcrete Nozzleman ShotAdhesive Anchor www.concrete.org/certification. in-Training Masonry Field Testing Technician Masonry Laboratory Testing Technicia Installer Anchor Technician Flatwork echnician Flatwork Finisher Specialty Commercial/Industrial Finisher Specialty Aggregate Testingtrial Technician Strength Testing Technician Laboratory Testing TechnicianTechni Testing Technician Aggregate/Soils Base Technician Concrete Construction Special Inspector Concrete Quality Technical Manager Concrete Transportation Special Inspector Tilt-Up Supervisor Tilt-Up Technician Shotcrete Nozzleman Shotcrete Nozzleman-in-Training Masonry Field Testing Technician Masonry Laboratory Testing Technician Adhesive Anchor Installer Field Testing Technician Flatwork Finisher Specialty Commercial/Industrial Adhesive Anchor Installer Industrial cian Strength Testing Technician Laboratory Testing Technician Aggregate Testing Technician Con Aggregate/Soils Base Technician Concrete Construction Special Inspector Concrete Quality T Inspector Tilt-Up Supervisor Transportation Special Inspector Shotcrete Nozzleman-in-Training Shotcrete Nozzleman Tilt-Up Technician Shotcrete Nozzleman-in-Training Masonry Field Testing Technician Adhesive Anchor Installer Masonry Laboratory Testing Technician Field Testing Technician Flatwork INSIDER INFORMATION Come to WOC Again William (Bill) Palmer Jr., P.E., FACI IT’S THAT TIME OF YEAR AGAIN—SHOWTIME. The 2020 World of Concrete (Feb. 3–7) promises Editor at Large some interesting new events and features in addition to the already great continuing [email protected] offerings. Here are a few things you won’t want to miss: Twitter: @wmpalmer • Polished Concrete Luncheon (Tuesday): Power trowels are opening a huge new market for polished concrete, since they can work large areas in a fraction of the time of traditional grinders. Learn more about this from a panel with Jessica Ledger- Kalen, Royale Concrete; Ryan Klacking, Syncon Inc.; Shawn Halverson, Surfacing Solutions Inc.; Ben Wiese, Multiquip; and Neil Roach, Redimere Surface Solutions. • Quality in Concrete Slabs Luncheon (Wednesday): Learn more about the newest ideas in curing for everything from industrial slabs to decorative concrete from this expert panel: Clark Branum, Diamatic USA, chair of ACI-ASCC Committee 310, Decorative Concrete; Dave Hoyt, Curecrete, chair of ACI Committee 310, Task Group on Curing; Scott Tarr, North S. Tarr Concrete Consulting; and Bob Harris, Struc- tural Services Inc. and the Decorative Concrete Institute. • Robotics Live: The robots are coming to your jobsite and sooner than you think. Check out this new event that will include the Tybot, an autonomous robot that ties The robots bridge deck rebar mats, and MudBots, a 3D printer that can build a concrete home in hours. (In the North Hall.) are coming • Decorative Concrete Live: This year, Bent Mikkelsen’s crew will focus on using insulating concrete forms, constructing urban water features, placing textured sooner than walking surfaces, selecting colored exterior coatings, forming curved surfaces with fabrics, and building concrete outdoor furniture. (South end of the Silver Lot.) you think. • Zero Emissions Live: This showcase area will focus on battery-powered tools and equipment. The batteries have gotten so much better that this is the quieter and cleaner future of construction. Participating companies are Wacker Neuson (vibra- tors and soil compacters), Green Machine (mini excavators, light towers, and batter- ies), and Ecovolve (electric dumpers). • Advanced Concrete Plants (Monday): Concrete producers will discuss the challeng- es of permitting and building new
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