Search results
Results from the WOW.Com Content Network
Early research (Bathurst and Jarrett, 1988) [13] found that cellular confinement reinforced gravel bases are "equivalent to about twice the thickness of unreinforced gravel bases" and that geocells performed better than single sheet reinforcement schemes (geotextiles and geogrids) and were more effective in reducing lateral spreading of infill under loading than conventional reinforced bases.
A life cycle assessment of flooring materials made of solid wood, linoleum and vinyl found the wood flooring had lower energy use and carbon dioxide emissions. It also performed better in environmental impact categories such as resource use, environmental toxin emissions, air pollution emissions and waste generation. [12]
Although sclereids are variable in shape, the cells are generally isodiametric, prosenchymatic, forked, or elaborately branched. They can be grouped into bundles, can form complete tubes located at the periphery, or can occur as single cells or small groups of cells within parenchyma tissues. An isolated sclereid cell is known as an idioblast.
It has most often been used together with reinforced concrete floors, but plans are in place to use it with cross-laminated timber floors, and post-tensioned stone floors. Reinforcing massive precut stone with post-tensioning reinforcement would make it strong enough to substitute for reinforced concrete in a wide range of applications.
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
Quartz has the lowest potential for weathering in the Goldich dissolution series and consequently it is very common as a residual mineral in stream sediments and residual soils. Generally a high presence of quartz suggests a " mature " rock, since it indicates the rock has been heavily reworked and quartz was the primary mineral that endured ...
LECA was developed about 1917 in Kansas City, Missouri, to the production in a rotary kiln of a patented expanded aggregate known as Haydite which was used in the construction of SS Selma, an ocean-going ship launched in 1919. Following in the USA was the development of a series of aggregates known as Gravelite, Perlite, Rocklite, etc
Note outlines of masonry that were the outer portions of structure, and small holes in cliff that once supported ends of floor beams. In the 4th century BC, tufa was used to build Roman walls up to 10m high and 3.5m thick. [13] The soft stone allows for easy sculpting. Tufa masonry was used in cemeteries, such as the one in Cerveteri. [14]