Plastic and nonmetallic article shaping or treating: processes – Forming structural installations in situ – Repositioning or moving mold to form sequential portions of...
Patent
1989-07-27
1991-06-04
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Forming structural installations in situ
Repositioning or moving mold to form sequential portions of...
249 20, 249 36, 264 34, 264 35, 264 69, 264256, 425 62, 425 64, 425 87, 425130, 425257, 425262, B28B 108, B28B 1300, E04B 116, E04G 1118
Patent
active
050212028
DESCRIPTION:
BRIEF SUMMARY
This invention relates generally to methods of building construction using materials, such as mud bricks, earth, soil and the like and unskilled labour amd more specifically is concerned with the construction of walls for homes by owners using loose earth, taken from owner builder sites, or elsewhere and then rammed.
The invention, according to one broad concept, resides in apparatus for forming rammed earth walls for building structures which includes two side and two stop end wood plank or board formwork members, placed in parallel spaced relationship and clamped together to form a wall moulding cavity for rammed earth, placed within the cavity, a bucket or the like for filling with rammed earth and lift means for lifting the earth-laden bucket up to the level of formwork members and a ram for ramming the earth into the moulding cavity characterized in that: a wall spacer member is provided at a distance from the inner surface of at least one formwork member which is less than the total width between opposite formwork members to form a central core cavity for rammed earth and one or two outer jacket cavities for moist, powdered cement mix, the mix being rammed as an outer layer or layers of facing or veneer jacket simultaneously with earth rammed in the inner or central cavity, whereby the mix veneer becomes an integral moulded jacket with the rammed earth wall. Preferably, two spacers are used to form a central moulding cavity for a rammed earth core and two other cavities for outer layers of rammed powdered mix or veneer material, the total width of the two outer jacket cavities being less than the width of the central core cavity, the height of the spacers being equal and enabling the height of the mix or veneer jacket to be equal to, or greater than the height of earth rammed in the central moulding cavity and more preferably, there are two spacers formed into the side walls of a box-like container which functions as an earth hopper having side walls and end walls with lateral dimensions less than those of formwork, the earth hopper container having an open top with a screening grid and a closable bottom or floor and is adapted to be level-filled with loose earth with the bottom closed and with the container resting upon the foundation footings, or upon a layer of previously rammed earth veneered with cement mix in formwork in a wall structure a pair of rectangular, flat, three-walled trays is adapted to be placed upon the loose-earth filled container and the trays level-filled with a moist powder, cement mix, the trays are tipped in opposite mutual directions into cavities between the formwork panels and the side walls of the container, until the level of cement mix is slightly above that of the earth, the bottom of the tray preferably comprises dual trapdoor segments, opened manually by lift and drop rods fastened by brackets and the container has hoist attachment lift means thereon for lifting up the container allowing earth to fall out and fill the core cavity between the loose cement mix material, both cement mix and earth then being rammed into an integral mass after the container is lifted out of the way.
According to one form of the earth hopper which may be preferred, the openable bottom thereof comprises a dual segment trapdoor, centrally hinged at a distance above the level of the bottom of the hopper walls and inclined at an angle to the horizontal and vertical, when in a fully closed position and when in a partially open position.
The invention, according to another broad concept resides in a method for constructing integral rammed earth and cement mix walls for buildings, homes and the like which comprises placing side wall and stop end vertical timber formwork members upon a wall foundation and in parallel arrangement to form a wall moulding cavity for filling with loose earth, reducing the width of the cavity by placing a wall spacer member or members therein at a distance from the inner surface of at least one formwork member to form a core cavity for rammed earth and one or two jack
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Kutach Karen D.
Lelong Marion P.
Silbaugh Jan H.
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