f o r mation of fiber balls in the con-c re t e. It also distributes the fibers in a thorough, uniform manner t h r oughout the mix. Steel fibers. Packaged in box e s and bags, steel fibers are manually added to the concrete at either ready mix plants or jobsites. At the ready mix plant, some fiber types may be preloaded into concre t e
Concrete Balls! 5 posts, 1 page 1 . sharpfocus. Senior Member. 475 posts Joined Feb 2006 Location: San Antonio, Texas. More info . Mar 25, 2006 11:01 | #1. In front of Starbucks. I can't figure out how they were made so that they are attached to the sidewalk.
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What is Shot Blasting? Steel Shotblasting is the preferred method of mechanical preparation that cleans and profiles simultaneously. Shot Blasting strips thin coatings, removes contamination and laitance (soft concrete) to reveal a mechanical profile for improved bonding. This method is achieved by blasting a concrete surface with steel shot (small steel balls) at a high velocity.
ASTM C 360 - Ball Penetration in Freshly Mixed Hydraulic Cement Concrete AASTHO T-183 - Test of Ball Penetration in Freshly Mixed Hydraulic Cement Concrete C. APPARATUS The ball penetration apparatus consists of a 6 in. steel cylinder with a hemispherically shaped bottom, which is …
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Concrete balls that size would weigh about 630 lbs. after curing. Vermiculite concrete is said to weigh 15% of what normal concrete weighs, and that would get you down to 94 lbs. If I were you, I'd coat a 24" exercise ball with expanding insulation (a.k.a. "Great Stuff") to about 8" or 10" thickness, except around the nipple.
Phase change material (PCM) is a substance that can absorb or release sufficient latent heat at phase transition. By encapsulating phase change paraffin in hollow steel balls in the concrete, an energy pile with PCM was innovatively produced to improve energy efficiency for the ground heat pumping system. Laboratory tests were carried out on both PCM energy pile and traditional concrete pile ...
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Adding steel or synthetic fibers to concrete at low-volume dosage rates provides benefits not available in conventional concrete. However, care is needed during mixing, placing, and finishing to prevent the development of fiber balls, the on-site addition of water to the concrete, and the possibility of visible fibers at the surface of the concrete.
Thus, the concrete test blocks in this test were prepared in four working conditions according to different volume rates of the phase change steel balls: A, B, C, and D, corresponding to 0%, 10%, 20%, and 30% steel ball replacement rate; water cement ratio (W/C) was 0.6.
Collect a sample of concrete to perform the slum test. Stand firmly on the footpieces and fill 1/3 the volume of the cone with the sample. Compact the concrete by 'rodding' 25 times. Rodding means to push a steel rod in and out of the concrete to compact it …
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VibraHone Vibratory Finishing
Once concrete is poured over the balls in the panels, the BubbleDeck system effectively becomes, and behaves like, a monolithic two-way slab that …
LS-DYNA simulation using erosive elements