asteroza + concrete   92

Deakin researchers design maintenance-free bridge for Geelong park | Deakin
carbon/glass fiber hybrid polymer rebar for concrete, as an alternative to basalt fiber rebar wherever steel rebar can't be used
polymer  glass  carbon  fiber  hybrid  rebar  concrete  reinforcement  materials  science  research  technology  basalt  alternative 
july 2019 by asteroza
Deakin researchers develop concrete solution for recycled glass | Deakin
some types of colored glass aren't recycled due to the difficulty in cleaning it up to clear again, so being able to use it elsewhere is a plus as an alternative to high grade sand. But this is polymer resin based concrete (substituting cement) so that's a different problem...
polymer  resin  concrete  recycled  glass  powder  aggregate  materials  science  research  technology  construction 
june 2019 by asteroza
Some sort of CCS in the form of direct injection of CO2 into wet concrete?
CCS  CO2  injection  concrete  materials  science  research  technology  construction 
october 2018 by asteroza
Hypersciences Inc. – Harnessing the Power of Extreme Velocity!
Using a gas gun for drilling. Air/diesel mix (so not a light gas gun) firing concrete projectiles at 2Km/s. I wonder if they use an ETC gun setup?
tunnel  tunneling  boring  mining  technology  gas  gun  concrete  projectile  research 
march 2018 by asteroza
Enhancing Mechanical Properties of Pervious Concrete Using Carbon Fiber Composite Reinforcement | Journal of Materials in Civil Engineering | Vol 30, No 3
permeable concrete normally sucks, but throwing ground up waste carbon fiber into it makes it strong enough for actual usage, particularly for road/ground cover where you want rain water to pass though into the ground reasonably quickly, rather than collecting pollution then ending up in storm sewers..
permeable  porous  carbon  fiber  reinforced  concrete  materials  science  research  technology  recycling  water  management  building  construction 
march 2018 by asteroza
Building for the future with KARL MAYER | Karl Mayer
Using warp knit weft insertion carbon fiber for low weight concrete
warp  knit  weft  insertion  fabric  grid  carbon  fiber  concrete  low  weight  lightweight  composite  textile 
november 2017 by asteroza
Using 3D printed wax molds that are CNC milled to shape to make 3D concrete panels. To be used on a few stations on the Crossrail project.
Australia  3D  concrete  wax  mold  printing  fabbing  construction  architecture 
october 2017 by asteroza
Storing energy at sea - Forschung Energiespeicher
Recent practical testing of using vacuum style concrete spheres at depth in underwater scenarios to store energy, by pumping seawater in/out of the sphere. Had a practical test to 100m, current pump/turbine tech limited to 700m...
pumped  hydroelectric  power  generator  underwater  vacuum  concrete  sphere  Fraunhofer  storage  energy  StEnSEA 
march 2017 by asteroza
airlight energy
Hrm, one type is a concrete trough with inflatable membranes as a general solar concentrator type, the other is a concentrator dish using an array of flat disc mirrors.
CPV  inflatable  solar  concrete  trough  CSP  thermal  PV  hybrid  power  generator  green  energy  Delicious 
september 2014 by asteroza
Empa - Shape Memory Alloys - A shape-conscious alloy
Low temp iron based SMA's make SMA reinforced prestressed concrete beams practical, which can be prestressed without elaborate tensioning systems. The only issue is the 160 degree transition temperature means if such a beam ever got exposed to a vehicle fire, it might fail faster than conventional prestressed concrete using steel rebar...
iron  manganese  silicon  SMA  shape  memory  alloy  metal  materials  science  research  technology  prestressed  concrete  tension  rebar  alternative  construction  building  architecture  Delicious 
june 2014 by asteroza
Technische Universität Wien : Eine Betonkuppel zum Aufblasen
Interesting, but I'm not seeing how this is substantially superior to traditional inflated form shotcrete concrete domes though.
pneumatic  wedge  construction  techniques  concrete  dome  inflatable  support  building  architecture  Delicious 
june 2014 by asteroza
Electricity and Power Storage - Ares North America
Someone is finally getting around to implementing heavy electric trains on long grades as a gird energy storage system. Though admittedly the current system is smaller scale and for load leveling a wind power plant, and using narrow gauge rail along with a third rail in rural settings seems like a poor choice in the long term. Concept is sound, but having individual motor/generator cars is an interesting compromise. As long as the primary weight can be provided by cheap gravel, I suppose it doesn't matter.
railroad  electric  green  potential  leveling  railway  ARES  rail  grid  train  power  generator  load  energy  storage  gravity  concrete  gravel  battery  Delicious 
august 2013 by asteroza
IEEE Xplore - Ocean Renewable Energy Storage (ORES) System: Analysis of an Undersea Energy Storage Concept
Hollow concrete sphere anchors for floating wind turbines do double duty, anchor the turbine, and serving as an energy storage subsystem by pumping water out of the sphere at depth. 30m sphere stores roughly 6MWhr, sweet spot is 750m depth, economically viable at 400m, works at 200m in a pinch, 1500m is pushing it (stress fracture implosion of the vapor head inside would be fierce).
marine  shell  structure  pumped  hardware  underwater  undersea  sphere  ocean  hydro  concrete  anchor  suction  energy  storage  Delicious 
may 2013 by asteroza
Apparently a commercial concrete mix for UHPC, suitable for high strength/high flexibility and certain repair situations. High environmental resistance properties such as salt water. Also can be used for bunkers, but governments get a little uppity about that...
defense  technology  research  science  materials  construction  france  premix  concrete  pressure  performance  high  ultra  UHPC  Ductal  Delicious 
march 2012 by asteroza
A Moon-Based Telescope - Technology Review
The bit about using reactive ion etching to finalize the lunar regolith concrete mirror shape is interesting, though is that before or after they coat the mirror with sputtered aluminum?
lunar  regolith  concrete  mirror  manufacturing  technology  materials  science  research  reactive  ion  etching  Delicious 
january 2012 by asteroza
One Per Cent: Green Machine: Storing wind power beneath the waves
This seems to be describing an underwater CAES setup, but I though the original concept was actually a pumped hydro based concept. Basically, a strong in compression concrete sphere has a positive displacement pump/generator placed on it, and pumps water out of the sphere at depth. This emulates a pumped hydro dam/lake/reservoir but with a huge hydraulic head. With a deep underwater CAES setup, you run the risk of the sphere becoming buoyant, which kinda defeats the secondary purpose of being an offshore floating wind turbine platform's anchor. Maybe it isn't actually CAES but a simple pressure regulation system to maintain minimum pressure to prevent excess vapor formation (and the risk of ice accumulation)?
CAES  ORES  ocean  offshore  renewable  energy  storage  concrete  sphere  pressure  differential  pumped  hydroelectric  power  generator  green  energy  grid  hydraulic  Delicious 
december 2011 by asteroza
Big marine construction company. Did a lot of the breakwaters in Tohoku, which unfortunately failed to live up to expectations. Particularly the failure modes were kinda ugly. Doesn't mean they suck, but a lack of out-of-the-box thinking was/is definitely present.
japan  construction  marine  structure  concrete  breakwater  port  harbor  dock  pier  Delicious 
november 2011 by asteroza
Concrete Canvas - Rapidly Deployable Infrastructure
Interesting material. I wonder if this could be used to make large diameter pipes on site, to reduce transport expenses, without needing a concrete making facility at the jobsite?
concrete  cloth  canvas  premade  prefab  shelter  tent  building  construction  architecture  survival  materials  science  research  technology  design  Delicious 
may 2011 by asteroza
NRC develops more durable concrete
Interesting use of wet shale rather than sand in the concrete mix to support internal curing for crack resistance
Canada  high  performance  reinforced  concrete  crack  resistance  materials  science  research  technology  construction  internal  curing  Delicious 
march 2011 by asteroza
If you accept that direct room temperature electrolysis has a poor efficiency, and that doing hydrogen production using mineral accreation electrodes in seawater has a similar efficiency, one can make the arguement that you might as well make the Biorock if you are going to do direct electrolysis anyways. You also create the semiporous seacrete/artifical rock that can be used as stable foundations for coral growth and ocean ecosystem recovery, or as a direct building material like concrete (though not high strength).
Biorock  seawater  ocean  artificial  rock  accretion  electroaccretion  electrodeposition  sea  seacrete  concrete  hydrogen  production  green  energy  construction  materials  science  research  technology  mineral  deposition  Delicious 
july 2010 by asteroza
Aercon AAC
Hrm, Japan, the land of concrete construction, would have field day with this. But there seems to be some politically motivated controversy regarding California not qualifying the material for seismic zones, so I wonder how that spills over.
AERCON  autoclaved  aerated  concrete  building  block  material  low  density  weight  architecture  construction  AAC  prefabricated  green  insulator  fireproof  Delicious 
june 2009 by asteroza
concrete submarine yacht, yacht submarine, submarine yachting (
Someone mentioned this may be columbian semisubmersible drugrunner sub builders trying to go legit...
concrete  submarine  marine  ocean  engineering  vehicle  ship  transportation  Delicious 
march 2009 by asteroza
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