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A bughole (or pinhole) is a small hole in the surface of a concrete structure caused by the expansion and eventual outgassing of trapped pockets of air in setting concrete. [1] [2] [3] Bugholes are undesirable, as they may compromise the structural integrity of concrete emplacements.
Armadillos burrow in forest areas, but their damage usually consists of dozens of shallow holes a few inches deep in your yard or garden. You also may see three-toed tracks with claw marks.
The grass creeps along the ground with its stolons, and roots wherever a node touches the ground, forming a dense mat. C. dactylon reproduces through seeds, stolons , and rhizomes . Growth begins at temperatures above 15 °C (59 °F) with optimum growth between 24 and 37 °C (75 and 99 °F); in winter or in the dry season, the grass becomes ...
A concrete mixture called hypertufa is used for similar purposes. Hollowed out portions of these tufa cliffs once formed back walls of rooms in a large prehistoric pueblo that stood here in Bandelier National Monument. Note outlines of masonry that were the outer portions of structure, and small holes in cliff that once supported ends of floor ...
Currently, precast concrete is the most common material for new manholes, but bricks and concrete blocks are still used in special situations such as when the work sites are in small area which are unsuitable for precast concrete lifting operations, or for chemical waste lines. [14]
Permeable pavers also combat erosion that occurs when grass is dry or dead, by replacing grassed areas in suburban and residential environments. [9] The goal is to control stormwater at the source, reduce runoff and improve water quality by filtering pollutants in the subsurface layers.
Fusarium patch is a disease in turf grass settings also called pink snow mold or Microdochium patch. In many cool season grass species in North America, it is caused by the fungus Microdochium nivale. [1] The white-pink mycelium on infected leaf blades is a distinguishing characteristic of the Microdochium nivale pathogen. [2]
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.