https://www.foreignaffairs.com/china/real-problem-global-trade

How does this stuff go on w/o ever acknowledging the crap #US #EU has been pulling for decades/centuries against #Asia #Africa - did somebody hold a gun to US/EU's head for not subsidizing the crap out of #EV #batteries #solar #wind #chips #electronics #steel #cement etc. and export the hell out of it around the world?

Burning forest “waste” to generate energy?

"Burning forest ‘waste’ to make cement damages the climate. Let’s pursue cleaner options."

"...Burning forest biomass, or so-called forest “waste” – which could include dead trees, understorey vegetation and fallen logs – generates large amounts of carbon emissions. It will likely also accelerate poor forest health. Burning forest biomass to make concrete is poor climate policy, poor environmental and forest policy, and a poor use of taxpayer funds."

"However, Australian governments must stop using taxpayer money to subsidise projects that entail large-scale burning of forest and woodland biomass for industrial energy." >>
https://theconversation.com/burning-forest-waste-to-make-cement-damages-the-climate-lets-pursue-cleaner-options-285141
#biodiversity #forests #deforestation #energy #BiomassBurning #cement #concrete #waste #tyres #climate

Phew, got the barn tidied up again just in time.

Also found out the exact lifting capacity of our Iseki's three point hitch - 500 kg. With a bit of OSB on top of the cement bags and the weight of the pallet forks (and pallet) I had to use brake steering as the front wheels were lifting and the rear hydraulics hitting relief pressure. Well designed balance! :)

My scrapmetal #PalletFork handled it fine and I got everything inside before the next rain front hit.

#Tractor #Iseki #Homestead #DIY #Cement #Barn #Pallet #Renovation

#cement : a powdery building substance

- French: ciment

- German: der Zement, zementieren

- Italian: cemento

- Portuguese: cimento

- Spanish: cemento

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Guess the next word of the hour @ https://24hippos.com

Woodchippping Australia's native forests to make cement?

* Concerns native forests could be part of Cement Australia's 'sustainable' fuel option as it moves away from #coal >>
https://www.abc.net.au/news/2026-06-01/cement-australia-railton-kiln-move-from-coal-to-alternative-fuel/106731932

* Environmental impact of concrete >>
https://en.wikipedia.org/wiki/Environmental_impact_of_concrete
#climate #NativeForests #Biodiversity #LoggingIndustry #cement #concrete #energy #pollution #PaveParadise

Again, don't do this with bare skin (use safety equipment and appropriate precautions)

#WoodAshCement

July 17, 2018, PrimitiveTechnology

"I developed an experimental cement from made only from re-fired #WoodAsh as its #cementitious material. It was mixed with crushed #terracotta as an aggregate and formed into a cube. The cement set hard after 3 days and did not dissolve in water after this period.

"Process: First I burnt bark and leaves in a kiln at high temperatures to produce well burnt, mostly white wood ash. The ash was then mixed into water and stirred well. The excess water was poured off and the resulting paste was made into pellets and allowed to dry. A pellet was then re-heated in the #forge until it glowed about orange hot. This was then taken out, cooled and dropped in a pot of water. The pellet dissolved and boiled due to a chemical reaction with the water. The paste was stirred and crushed terracotta (old tiles from previous projects) was added and mixed to form a mouldable #mortar. This was formed into a cube and allowed to set for three days (in the video, a cube made exactly the same way 3 days previously was used due to time constraints). The resultant cube was strong and made a slight ringing sound when tapped with a finger nail. It was placed in water for 24 hours to simulate a very heavy rain event and did not dissolve or release residues into the water.

"My current theory: The main component of wood ash consists of #calcium in some form (e.g. #CalciumCarbonate, #CalciumOxide). This can be up to 45% from my research. Calcium is in higher concentration in the #bark and #leaves of a tree. When the ash is mixed with water, the soluble component of wood ash (10% pot ash) dissolves into the water. But seeing that it does nothing for the cementing process, it is drained off leaving the insoluble calcium (and other components) in the paste. Doing this probably raises the relative percentage of calcium in the paste to about 50% or more. Most of the other 50 % consists of silica and alumina which are #pozzolans, materials that chemically react with calcium hydroxide to increase the durability of the cement product. The paste was then made into a pellet and fired again to high temperature to convert all the calcium compounds to calcium oxide. It also reduces any charcoal in the pellet to ash if it hadn’t already been burnt the first time. This step seemed important as un-fired ash pellets only partially hardened and would fall apart in water, though retaining a weak undissolved 5mm thick crust. I can only surmise that re-firing the ash just gave a greater conversion of the calcium components to calcium oxide. The pellet is slaked in water converting the calcium oxide to calcium hydroxide. This cement was mixed with crushed terracotta which may also help in some way that I’m not aware of as I only did this one experiment and did not test other aggregates yet (e.g. sand, gravel etc.). Terracotta is porous and might hold together better than other materials. The mixture is allowed to set in air where carbon dioxide reacts with calcium hydroxide to form calcium carbonate cementing the aggregate together. After this, the cement will not dissolve in water.

"Use: I think this material might have a potential use as a mortar holding rocks or bricks together in wet environments where #limestone or #SnailShells are unavailable for making cement. Wood ash is a pretty ubiquitous material to most natural environments inhabited by people using biomass fuels. Wood ash cement turns a waste product into a valuable building material. From my research, wood ash is already being used as a partial replacement for cement in the building industry without decreases in strength of the final product. But I’ve only just started experimenting with it and don’t know its full capabilities and limitations. Calcium content of wood ash differs depending on the species of tree, the part of the tree burnt and the soil it’s grown on. Cautious experimentation is still required before committing to a hut built from this material."

Learn more:
https://primitivetechnology.wordpress.com/2018/07/17/wood-ash-cement/

#SolarPunkSunday #DIY #Cement #Woodashes #BuildingMaterials