Wind Science and Engineering Research Center Texas Tech University Lubbock, TX 79409–1023 ... A brochure titled Debris Impact Testing—Wind Science and Engineering, ... splintered on impact. 8 in. CMU reinforced with concrete and #4 rebar in every cell; truss type horizontal reinforcement was ...

Test demonstrates NUDURA Insulated Concrete Form wall system against the impact of debris at tornado wind speeds. All tests were conducted in strict accordance to the guidelines of FEMA 320/361 and ICC-500. The debris criteria required a 15 lb. wooden 2 x 4 to be propelled at 100 mph for a 250 mph ground speed tornado.

Impact testing of precast insulated sandwich wall panels show that precast concrete provides excellent resistance against flying debris, which often become projectiles .

On slabs S-6 and S-7 with the 100 mm thick and slab S-5 with 75 mm thick and ρ bot. = 1.15 % there were not concrete debris and scabbing. These slabs were only damaged but not entirely perforated. Also a few narrow and hair line cracks were observed on the back surface of the slabs S-5, S-6 and S-7.

Most C&D debris can be reused or recycled – resulting in significant environmental benefits as well as economic advantages for builders and contractors. Reusing and/or recycling C&D debris: conserves natural resources; reduces the environmental impact associated with the extraction of natural resources

May 17, 2007 · Concrete walls don't have the debris problem. Just providing the concrete and reinforcement needed to build the walls and decks (ceilings or floors) of a house is usually all that's needed to provide the strength against wind and seismic forces and to protect from debris.

You already know the most dangerous part of a tornado is not high winds but the debris which they carry. With that knowledge Texas Tech engineers compared the impact resistance of concrete residential wall construction with conventionally framed walls.

I would think that given a normal concrete foundation and its supported weight that it wouldn't need to be much larger than a normal retaining wall type of application. 2) Otherwise you need to find an equation that gives you the energy of impact of a debris flow.

Hammer impact energy is the most important selection criteria when choosing a mounted breaker for a particular job, since the hammer must be able to hit the concrete hard enough to fracture it. Only when impact energy is sufficient does impact rate (blows per minute) become a factor.

Test demonstrates NUDURA Insulated Concrete Form wall system against the impact of debris at tornado wind speeds. All tests were conducted in strict accordance to the guidelines of FEMA 320/361 and ICC-500. The debris criteria required a 15 lb. wooden 2 x 4 to be propelled at 100 mph for a 250 mph ground speed tornado.

The Arbitrary Lagrangian Eulerian (ALE) algorithm embedded in ANSYS LS-DYNA was adopted to model the impact process of concrete debris on sand surface. In this study, the concrete debris was meshed by a Lagrangian grid as solid, whereas the air and the sand were meshed by an Eulerian grid as fluid.

Construction and Demolition (C&D) materials consist of the debris generated during the construction, renovation and demolition of buildings, roads, and bridges. EPA promotes a Sustainable Materials Management (SMM) approach that identifies certain C&D materials as commodities that can be used in .

The failure of debris dams impacted by the massive stones in a debris flow represents a difficult design problem. Reasonable materials selection and structural design can effectively improve the resistance impact performance of debris dams. Based on the cushioning properties of expanded polystyrene (EPS) concrete, EPS concrete as a buffer layer poured on the surface of a rigid debris dam was ...

Debris driven by high winds presents the greatest hazard to homeowners and their homes during tornadoes and hurricanes. Recent laboratory testing at the Wind Engineering Research Center, Texas Tech University, compared the impact resistance of residential concrete wall construction to conventionally framed walls.

Recycling of concrete debris can make a contribution to reducing the total environmental impact of the building sector. To increase the scope for recycling in the future, aspects of recycling have ...

The concrete stopped the debris from traveling through the wall. Exterior finishes were damaged by the impact, but the concrete walls were unscathed. Even the narrowest, 2″ thick section of "waffle grid" ICF wall was undamaged by the direct impact of the debris at .

Construction and demolition (C&D) waste is a central component of the solid waste stream, amounting to roughly 25 percent of total solid waste nationally. The largest part of C&D material is concrete, which encompasses around 70 percent of C&D generated material before recycling, according to the U.S. EPA. Construction (21.7 million tons) and demolition (353.6 million tons) activities ...

qwack said: I feel the same way about most animators who are "high class". Him, Tanaka, Shida, Norio, Abe (Especially Abe) get all the flashy effects to work on instead of close combat.

Concrete walls do make a big difference in protecting life and property when winds blow with hurricane and tornado force, according to new scientific research conducted by the Wind Engineering Research Center at Texas Tech University. You already know the most dangerous part of a tornado is not high winds but the debris which they carry. With ...

Test demonstrates NUDURA Insulated Concrete Form wall system against the impact of debris at tornado wind speeds. All tests were conducted in strict accordance to the guidelines of FEMA 320/361 and ICC-500. The debris criteria required a 15 lb. wooden 2 x 4 to be propelled at 100 mph for a 250 mph ground speed tornado.