Is it possible to improve aircrete's tensile strength with straw or other fibers?
What fibers could be used to improve the tensile strength of aircrete? How effective will they be?
A fiber mesh that is commonly used to improve the tensile strength of aircrete is APOC 483.
Adding any fibers into aircrete during the production process is known to degrade the product. However, adding a fiber fabric/mesh to the exterior of a completed aircrete structure is very effective.
APOC 483 has these characteristics:
Tensile Strength (ASTM D5034) Warp 74 lbs. Fill 45 lbs.
Elongation (ASTM D5034) Warp 21.3% Fill 51.3%
Ball Burst (ASTM D3787) 111 lbs.
Trapezoid (ASTM D117) Warp 13.5 lbs. Fill 24.2 lbs.
Some aircrete builders mention using other fabrics such as landscaping fabric, stucco mesh (ie. FiFlexMesh EF-38150), and even basalt mesh (such as 25mm coated basalt mesh) for use where fire is a threat.
Domegaia uses APOC 483 applied with "fabric glue" to the exterior and interior of all their domes. Some think the exterior application may be the critical one and that an interior application does not offer considerable structural support, considering the nature of domes.
@KnowItAllTeen we experimented using hemp before and it made the brick 7 times stronger if I recollect correctly…
@Ignacio-DHOME Are you talking about an aircrete brick your reinforcing by injecting hemp fibers? Is that what you are taliking about? In terms of strength, are you talking about tensile strength?
@Ignacio-DHOME Also very curious to know this.