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Chopped Straw for Plaster and Cob
Straw gives clay plasters, cob and mud bricks tensile strength: its fibres hold the clay together as it shrinks and stop cracks. Natural builders cut it short for plaster, about 6 to 25 mm, and longer for structural cob, about 25 to 75 mm. Dry, clean wheat or rye straw is best.
初学者
1 hour per sack
说明
1
1
Choose the length
Choose the length
Plaster: 6–25 mm. Cob: 25–75 mm. Decide before you start.
所需工具：
卷尺2
2
Chop on a block
Chop on a block
Lay a handful of straw across a log end and chop it into lengths with the machete or billhook, feeding the bundle forward a length at a time.
此步骤所需材料：
稻草5 公斤所需工具：
砍刀
钩镰刀
皮革工作手套
安全眼镜3
3
Sieve for plaster
Sieve for plaster
For plaster, shake the chopped straw over a coarse wire sieve: what passes is plaster straw, what stays goes to cob or back to the block.
所需工具：
粗金属网筛
100 升大塑料盆
防尘口罩4
4
Bag it dry
Bag it dry
Store in sacks somewhere dry; damp straw goes mouldy.
所需工具：
麻袋
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