Open Source Concrete Work

From Open Source Ecology
Jump to navigation Jump to search

Notes

  • Get yourself a power trowel - [1]
  • Polymesh F is an extra $5/yard for concrete work - [2]
  • Fiber still requires rebar [3]
  • Use Steel Fiber Concrete for strength - not available in many places.

Workshop Foundation

  • 3000 sf build of prototyping area for the Seed Eco-Homes, for building a second workshop space, with various prototyping experiments from material production to large CNC machines, 2021. Large truss structure at Universal Prototyping Structure

Open Source Power Trowel

  • Combo blade - that is what they have at Rentall
  • This is their finish blade.
  • In video below, they show float and trowel blades as separate?

Notes On Technique

  • Source 1 - [4]
  • Temporary screed posts explained here for larger slabs poured in sections:

  • 14 foot sections are laid down, so it's convenient for a scree board. Work in 14 foot strips:

Understanding Concrete Timing

In good weather - power trowel is about 2 hours after pour is finished.

  • 35 yard slab
  • 2 guys screeing, 2 guys behind them moving concrete around - 4 person job
  • Batched at 6.
  • Arrived on site at 7.
  • Finished pour 8:30
  • Start mag floats on edges at 10:20 AM
  • Edger at 10:30
  • 2:15 hours after pour ready to walk on, sinks about 1/8"
  • Float blades first, finish trowel blades second. Take off the float blades to use the finish blades.
  • Power trowel started at 11 am at 2.5 hours after start of pour - with float blades first. Only 1+ hour for power trowel.
  • Notes: effectively, go from screeing step - to edger - to power trowel. Edger can be avoided. Power trowel does both float and trowel.

Links

Retrieved from "https://wiki.opensourceecology.org/index.php?title=Open_Source_Concrete_Work&oldid=260474"