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What causes popouts? Popouts on a concrete surface are from absorbant aggregates that freeze and expand.
Much of the concrete underneath the deck was restored.
Mapelastic SRS is a seamless rubber membrane formulated for sewage and manhole rehabilitation environments.
Can stainless steel tie wire be used with standard rebar?
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The Epoxy Interest Group of the Concrete Reinforcing Steel Institute recently announced the publication of “Corrosion-Resistance of Reinforcing Bars: An Accelerated Test,” a report on the corrosion resistance of various types of rebar.
Conventional means of internal reinforcement for concrete member in buildings involve steel bars.
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A handful of drizzly days would be enough to mend a damaged bridge made of the new substance. Self-healing is possible because the material is designed to bend and crack in narrow hairlines rather than break and split in wide gaps, as traditional concrete behaves.
The high pH of uncarbonated concrete (minimum 12.5) keeps steel from corroding when chloride contents are less than about 0.20% by portland cement mass.
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Some metals usually get along fine in portland cement mortar and concrete. Some do not, for some it depends. Iron and steel are among the first kind.
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Concrete shrinks as it dries and hardens, leading to the formation of drying shrinkage cracks.
Severe corrosion of reinforcing steel in the concrete barriers on several bridges in the Rochester, N.Y., area forced department of transportation engineers to look for cost-effective, long-term solutions for rehabilitating these aging structures.
Mapei Mapefer 1K
Corrosion-inhibiting protection of embedded steel reinforcement in concrete is now faster and easier with the development of Maperfer 1K.
Eneseal CR dries to a durable, elastomeric skin over metal, concrete, and masonry surfaces.
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.
Providing a cost-effective PT tendon end finish in slab on grade and moderately corrosive environments, the PocketCap corrosion protection cap easily taps onto the tendon end after cutting.
Here's how some problems in the field got solved.
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Once the king of admixtures, calcium chloride was dethroned decades ago because it initiated corrosion of steel in concrete. It has never risen to its former heights and today there is a lot of confusion about whether its character is good or bad. Its good character relates to countering the...
It's a fact of life for building owners and structural engineers everywhere: embedded steel in concrete corrodes. But Innovative Engineering Technologies (IET), a Stuart, Fla.-based engineering company, developed Perma Treat, a patented product that eliminates the need to conduct excessive...
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Nearly all bridge decks are constructed of concrete. And almost all concrete bridge decks contain cracks—lots of cracks. Cracks are the bane of deck longevity. They allow the ingress of salts that cause corrosion of the reinforcing steel, exacerbating concrete cracking and loss of structural...
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We are on a job where the only source of potable water for curing concrete is about a mile away. The general contractor plans on using a deep well as a water source for curing. While waiting for water quality test results, however, we noticed red iron sta