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What is low-chert aggregate and what benefits do they provide ...

Chert, which is found to some degree in most aggregate deposits used to produce concrete in Southeastern Wisconsin, is porous aggregate (sand, gravel, or crushed stone) with low-resistance to weathering. Chert can cause surface defects, known as "pop outs," in exterior concrete flatwork applications. Pop outs are indentations in a concrete slab surface created when porous aggregate picks up moisture, freezes, expands, and fractures, taking a portion of the concrete slab surface mortar with it.

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Aggregate Concrete - an overview | ScienceDirect Topics

Preplaced-aggregate concrete is more resistive to shrinkage and creep than conventional concrete is. This is due to the aggregate. The net result is more protection against cracking. This type of concrete can be used on numerous types of structures. The cost involved with using preplaced-aggregate concrete is likely to be more, but it may be worth it in the long run.

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One Thing: Aggregate Moisture Content Testing - NPCA

What is aggregate concrete?

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Aggregate in Concrete - The Concrete Network

Aggregates comprise as much as 60% to 80% of a typical concrete mix, so they must be properly selected to be durable, blended for optimum efficiency, and properly controlled to produce consistent concrete strength, workability, finishability, and durability (Photo 1).

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Gravel: A Versatile Aggregate . Read on to learn about gravel's role in some of our projects, and be sure to visit the rest of our blog to le… Read More. Reliable Contracting in the Community: The Walk to End Alzheimer’s 2020 . Visit a Reliable Contracting office or donate online to help support the Alzheimer’s Association’s Walk t ...

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