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One of the rules for laying out sawed contraction joints is to not join them at angles less than 60 degrees because cracks form across the angle as shown here.

Controlling Cracks in Slabs with Unusual Panel Geometries

Tips for crack control in concrete panels with unusual shapes.

Scaling, above, and premature surface wear typically occur when contractors mix bleedwater into the surface or trap bleedwater and air directly beneath the surface.

Avoid Surface Defects on Exterior Slabs

Handleless rope brushes work well on large slabs and in confined areas where handles are awkward.

How to Avoid Broomed Concrete Finish Disputes

Above and below: Properly placed/supported reinforcement will result in properly located reinforcement in the slab. Consult manufacturers' literature for maximum chair and other support spacing and use a 12-inch minimum reinforcement spacing so workers can avoid walking on the reinforcement.

How To Reinforce Concrete Slab on Ground to Control Cracking

It can be easy to underestimate the importance of correct surface preparation before installing a new floor, but improper preparation can cause a failure in your coating which can increase costs.

Concrete Tips for Flooring Success

One of the major concerns on the project was the extensive plumbing running throughout the floors with a potential for reflective cracking along the pipe placements.

State of the Art Facility Incorporates State of the Art Technologies

May2020 Us Construction Spend History

May US Construction Spending Bucked Rising Employment with a 2.1% Drop

Most of the drop owed to an 8.5% plunge in single-family housing spending but nonresidential was also negative, weighed down by falling power, commercial and manufacturing

Screed maintenance is just like any other type of maintenance: if you ignore it, you pay in the long run. If the crew takes a little time in the morning to ‘zero’ out the screed adjustments and make a visual inspection of the screed condition, you start out the day giving your crew the best chance for success.

The Importance of Screed Maintenance

A clean, level and well-adjusted screed helps ensure a quality mat

Improved Insights Into All Your Equipment

Improved Insights Into All Your Equipment

With a unified platform for your machines, you can get the insights you need to make operational improvements that impact the bottom line.

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MAKO Improves on Award-Winning Concrete Elevation Control Systems

Offers durability, support and efficiency as part of the MAKO Screed Support Systems

Placing pavement on steep slopes is challenging—estimating is more difficult, concrete mixes must be low slump, more labor is needed, equipment needs are different, and finishing is more complicated.

Building A Velodrome

The Kenosha Park District in Wisconsin is rebuilding its velodrome, a track arena dedicated to bicycle racing. The track has two straight sections and two 180-degree high pitched circular bends. It’s one of the oldest tracks in the U.S., starting in 1927.

Bases for slabs-on-ground must be smooth, hard and compacted.

Slabs-On-Ground: Slab Thickness and Base Tolerances

Slab thickness is the greatest single factor controlling the load-carry capacity of a slab-on-ground.

MAKO’s Base Plate and FinCap 4.5 Screed Support System provides exact elevation control for concrete slabs.

Elevation Control System Helps Meet Ff Specifications

Poppoff Inc. teamed with Joseph Easley Construction to complete the division three concrete package for the the new Preferred Freezer Services project. Pictured here, Matt Poppoff and James Easley.

Warehouse Project Consumes Nearly 47,000 cu. yds. of Concrete

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Spectra Precision QML800 QuickMark Layout

Lasers controlled by a mobile application running on an Android tablet

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Laser Range Meters PD-I and PD-E

Pictured is the completed service bay at Western States Equipment Company after cleaning with the autoscrubber and before applying the FirstPolish, step three.

Mutually Beneficial Relationships Creates Solution

The FORTA-FERRO macro-synthetic fiber was used in a very large slab on metal deck project in Middleton, Del., that provided a working surface for the 2nd-level order fulfillment operations for the Amazon.com division of Amazon Corporation.

Not Meshing Around

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FedEx Flips for Concrete

Merlo Construction proves concrete’s benefits over asphalt on a recent 1 million square foot distribution facility paving project.

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Adding Calcium Chloride to Improve Cold Weather Concrete Pouring

Calcium chloride is the most effective and least expensive cold weather accelerator for concrete. But its use may be limited by building codes or prohibited by some specifications.

Finishing the pervious concrete was done with roller-screed strike-off, covered with plastic and rolled, and then received a plastic cover cure.

Pervious Concrete Pavement Gets Fiber Reinforcement

Two types of synthetic fiber reinforcement added durability to light and medium-to-heavy duty pervious pavement areas

December 11 Webinar: ADA Compliance in Concrete Construction

This ASCC webinar will addess some of the challenges associated with ADA requirements for curbs, ramps, transition points and ADA detectable warnings

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Model 210B-2 On-Grade Drill

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Webinar: Constructability of Voided 'Two-Way' Flat Slabs

Voided slab technology can reduce the dead load of a concrete slab by as much as 35% and allow for large clear spans.

Allen Concrete College

October 7, 2013October 8, 2013

Classroom and hands-on training in concrete placing and finishing techniques to produce high F-Number floors.

The outside facade of the Billy Earl Dade Middle School in Dallas, Texas, which opened on time and under budget thanks in part to a new rapid-drying concrete technology.

New Rapid-drying Concrete Technology Shaves 4 Months off Construction Schedule, Cuts Costs on School Project

Aridus is a proprietary concrete mix that provides high early strength, minimizes curl, and reduces drying time and floor covering risks associates with excess moisture vapor in the slab.

When you mix high dosage levels of macro fibers in concrete, one of challenges is to achieve a good blending between concrete and fiber.

How High Dosage Levels of Macro Fibers Are Improving Concrete Slabs

Slab-on-grade floor and pavement panels shrink less and have almost no curl.

Reduce Unplanned Downtime by 28%

Reduce Unplanned Downtime by 28%

Preventative maintenance tools from Samsara can help you collect data directly from each machine. Detect issues and reduce unplanned downtime.

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FL Screed - Unshored Slab on metal deck

2 finishers operating the FL Screed for the first time screed off 140 yards on an unshored metal deck. Even with deflection, and after taking a 1000 elevation readings, produced overall FL 20, a +/- 1/4" floor.

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FL Screed - Floating Manual Laser-Guided Concrete Screed

The world's first laser-guided manual screed automatically holds grade to +- 1/8". Very simple to operate. Training takes 10 minutes. LCD display shows operator grade of screeded concrete every inch of the way. Comes with single 360-degree receiver that works with any customer-supplied transmitter. Proof is in the profile graphs. See them in the video.

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ACI Offers Updated Specification for Pervious Concrete Pavement

Architects and engineers can customize specification 522.1-13 for individual projects

Speed Screed Cruiser, used in paving Sonoma County bus yard, includes extensions that allow variable paving widths and crown variations.

'White' Pavement for 'Green' Buses

A California transit company installed concrete pavement in a bus yard that houses compressed natural gas (CNG) buses.

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Laser Strike FL Screed

Laser-guided floating screed that eliminates all grade cutting on concrete floors, reducing manpower needs by up to two laborers

Document: How to Use MAKO Screed Support System

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Screed Support System

The Superflat floors at the Emmi Roth Cheese Factory measured an FF 171/FL 95. Floor flatness and levelness was necessary for the automated cheese-aging robot that will move up and down the aisles.

Golden Trowel Awards Recognize the World’s Flattest Floors

Golden Trowel winning concrete floor projects are determined by measurements based on the F-Number system.

Construction schedules and contractor economics typically require concrete placements of 10,000 to 20,000 square feet or from 30,000 to 50,000 square feet when a Laser Screed is used. This figure shows a 300,000 square foot pour that was completed within 24 hours in a single concrete placement.

Specification Limits on Slab-on-Grade Placement Size

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Aridus Rapid Drying Concrete - The Billy Dade School Project

The video highlights Aridus Rapid Drying Concrete benefits from the owner, architect and contractor standpoints. Aridus is a proprietary concrete mix that reduces the drying time and risks associated with excess moisture vapor in concrete slabs, enabling faster, more effective floor covering installations. Aridus is the first ready-mix concrete solution to floor covering failures, an industry wide problem that cost millions of dollars annually. For more information visit www.us-concrete.com/aridus

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Video: Minnich A-2C Dowel Pin Drill

Minnich manufacturers the A-2C Dowel Pin Drill which is capable of horizontal, vertical or 35-degree stitch drilling