This concrete plan tackles moisture issues and helps prevent construction delays.
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Besides changing the color, does adding pigment to concrete have any other effects on its properties that a contractor should be aware of?
The SIW 18T impact wrench delivers maximum efficiency when fastening metal bolts, wood lag bolts, and concrete screw anchors.
Tom Tedford makes a living installing underlayments for concrete floors in the Phoenix area. As a pro, he knows how cumbersome the leveling process can be for large projects.
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Staker Parson Companies has created a new line of customizable concrete mixes, WIN3, that adapt to weather, time constraints, and other unique ready-mix concrete challenges. WIN3 mixes were developed to provide contractors and owners with a mix design that is easier to work with and finish.
Although asphalt has dominated the road repair market for years, recent studies and changing market conditions now indicate the numerous benefits of concrete over blacktop.
First used on a large-scale commercial project in 1983, the F-number system for measuring floor flatness and levelness has been perhaps the most significant factor in enabling the construction of flatter and more level concrete floors.
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On June 27, 2008, a live tilt-up construction demonstration was hosted by Star Inc., designer and builder, with the help of a crane from ALL Erection & Crane Rental Corp. For this demo, ALL Erection provided both the 500-ton Liebherr hydraulic all terrain crane, with 101 feet of main boom and 264...
Stairs play an important part in many projects. Providing both access and egress, stairs can be out of sight and infrequently used—such as in high-rise buildings—or they may be among the most prominent features at the gateway to a site.
Treating chopped synthetic fibers by this unique process permits 3-in. fibers to be added to concrete mixed with commercial equipment so that fibers remain flat and are uniformly distributed and oriented randomly throughout the concrete.
A tight schedule and a variety of project challenges were no match for contractor DF Perez, Anaheim, Calif., when renovation began on the California Institute of Technology's six-building South House complex.
Selecting the cement to be used in a concrete can have a lasting impact on the life span of new concrete bridge decks.
We recently were called to apply an epoxy surface to a newly constructed 6-inch-thick warehouse slab with a tight 12x12-foot sawcut control joint pattern. Can you explain what may have caused these random cracks to develop?
Calcium chloride has a strange reputation—it's probably the most used admixture for concrete and also the most controversial. On the positive side, CaCl is an excellent, inexpensive accelerator; its bad rap stems from its contribution to corrosion of steel reinforcement and metallic floor hardeners.
ACI 212.3 reminds us that chemical admixtures are designed to enhance the properties of concrete in the plastic and hardened states, increase efficiency of cementitious material, and improve the economy of concrete mixtures. While concrete contractors are not required to have the same level of...
Today's concrete mixes are more complex than ever, combining a wider range of cements, supplementary cementitious materials (SCM), and chemical admixtures to produce economical concretes that can meet exacting performance requirements. Unfortunately, materials sometimes interact in unexpected ways...
Although most experienced contractors know how to place concrete in ambient conditions, some conditions are better than others. Jerry Holland, director of design services for Structural Services, Dallas, defines the “reference volume” of a slab in relation to the conditions under which it was...
While some activities, like painting and caulking, have to wait until better weather returns, concrete work can usually continue provided you plan appropriately and apply the extra care that's needed. With that in mind, here are a few reminders about the perils—and pluses—associated with...
What separates the really good contractor from the competition is attention to detail and consistency, especially with the finishing near edges, block-outs, drains, clean-outs, and other penetrations. Except for the best finishers, this detail work is fast becoming a lost art.
Water-reducing and set-controlling admixtures represent one of the more important groups of chemical admixtures used in concrete. These admixtures reduce the water requirement of a concrete mixture for a given slump or increase the slump for a given water content.