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2. Pavers (flooring) - Wikipedia

   en.wikipedia.org/wiki/Pavers_(flooring)

   Pavers manufactured from concrete go well with flag, brick and concrete walkways or patios. Concrete pavers may be used where winter temperatures dip below freezing. They are available in hole, x-shape, y-shape, pentagon, polygon and fan styles. An interlocking concrete paver, also known as a segmental paver, is a type of paver.

3. Permeable paving - Wikipedia

   en.wikipedia.org/wiki/Permeable_paving

   Permeable pavement surfaces may be composed of; pervious concrete, porous asphalt, paving stones, or interlocking pavers. [1] Unlike traditional impervious paving materials such as concrete and asphalt, permeable paving systems allow stormwater to percolate and infiltrate through the pavement and into the aggregate layers and/or soil below. In ...

4. Sidewalk - Wikipedia

   en.wikipedia.org/wiki/Sidewalk

   Raised sidewalk with stone curbs beside a 2000-year-old paved road in Pompeii, Italy. A sidewalk (North American English) [1] [2] [3] or pavement (British English) is a path along the side of a road. Usually constructed of concrete, pavers, brick, stone, or asphalt, it is designed for pedestrians.

5. Paver base - Wikipedia

   en.wikipedia.org/wiki/Paver_base

   Paver base is a form of aggregate used in the construction of patios and walkways whose topmost layer consists of mortarless (or "dry-laid") pavers. The first layer in the construction of such a surface is called the subgrade —this is the layer of native material underneath the intended surface.

6. Road surface - Wikipedia

   en.wikipedia.org/wiki/Road_surface

   Concrete roadway in San Jose, California A concrete road in Ewing, New Jersey. Concrete surfaces (specifically, Portland cement concrete) are created using a concrete mix of Portland cement, coarse aggregate, sand, and water. In virtually all modern mixes there will also be various admixtures added to increase workability, reduce the required ...

7. Study retracted years after it set off an infamous COVID-19 ...

   www.aol.com/news/study-retracted-years-set-off...

   A discredited study that set off a flurry of interest in using an antimalarial drug to treat COVID-19 has now been formally withdrawn. A scientific journal on Tuesday retracted the March 2020 ...