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Unlike concrete or adobe, papercrete blocks are lightweight, less than a third of the weight of a comparably-sized adobe brick. Papercrete is generally mold resistant and has utility as a sound-proofing material, however mold can develop if the material remains warm and moist for too long. [1] Dried, ready-to-use papercrete has a rough surface.
Choqa Zanbil, a 13th-century BCE ziggurat in Iran, is similarly constructed from clay bricks combined with burnt bricks. [ 1 ] Mudbrick or mud-brick , also known as unfired brick, is an air-dried brick , made of a mixture of mud (containing loam , clay , sand and water ) mixed with a binding material such as rice husks or straw .
Earth structure materials may be as simple as mud, or mud mixed with straw to make cob. Sturdy dwellings may be also built from sod or turf. Soil may be stabilized by the addition of lime or cement, and may be compacted into rammed earth. Construction is faster with pre-formed adobe or mudbricks, compressed earth blocks, earthbags or fired clay ...
To construct a flat adobe roof, beams of wood were laid to span the building, the ends of which were attached to the tops of the walls. Once the vigas, latillas and brush are laid, adobe bricks are placed. An adobe roof is often laid with bricks slightly larger in width to ensure a greater expanse is covered when placing the bricks onto the roof.
Bricks made without straw would break and crumble easily. Adobe bricks used around the world are generally only sun dried but grasses, straw and other materials are added to the clay for the same basic reasons. [3] The ancient brick-making process can still be seen on Egyptian tomb paintings and models.
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The earth used for building ceramic houses is essentially a type of adobe with a higher clay content and fewer impurities. The earth and water are mixed until the substance has "the consistency of bread dough" [3] The clay/earth mixture is worked into forms, and the blocks dry over a period of one to two weeks.
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