US1624802A - Concrete reenforcing bond and connecter - Google Patents

Description

1927. Apnl F. REBELL CONCRETE REENFORCING BOND AND CONNEOTER Filed June so. 1925 Mntoz F. RE'be'Ll Patented Apr. 12, 1927.

- tense Pars r, QgFFIC E.

. rnnn REBELL, ornon'ri-i sna tenant AUSTRALIA.

"ooncitnr n nnnn'roncme T onn nn conNnoTER.

Application filed June 30, 1e25,'seria1 ma am, :and in Australia September 22, 1924.

Heretofore it has been customary to weld or tie the" reenfo rcing means of concrete slabs together and to cement concrete or other plastic slabs at their interconnections,

. andit is this construction that the present inventions aims to avoid and yet at the sametime to construct a concrete; wall of plastic material'not only insuring greater strength in the concrete or cement but also insuring considerable strength in the bond or'reenforcement, especiallywhere the slabs'are fabricated, r d Anotherpurpose is to provide, in a con Crete; building slab, an improved bond V, for the slab'itself aswell as a secure bond be tweenthe slabs, the slabs tobe conveniently cast, in shallow molds or frames flat on the ground or floor 'orone over another, there being suitable-lugs fixed to the frame at regulanintervals toform gaps in the edges of the slabs to hold the bonds or reenforcing rods in position. This method is equally applicable to concrete beams, columns, pipes, etc, and particularly for use inithe "con- 'struction of buildings, silos, bridges, etc;-

Still-another purpose is to provide an improved and/secure interlocking between the bonding of the slabs, where two are edgewise adjacentand where "a third slab is positioned at; right angles to the edgewise adjacent slabs, the third slab overlying the joint between-the first 'two slabs, it being possible thatwhen thefslabs are so connected, the gaps or notches in the'sla'bsmay be closed by cement or-other plastic material.

It is to be understood that theparticulars,

herein given are in no Way limitative and that, While still keeping Within the scope of the invention; any desired modifications of detail and desired proporti'ons' may be made in the-apparatus 'accord ng to the circumstances;

set forth, shown The; invention comprises further features and combinations of'parts t-ojbe hereinafter in the drawings and claimed Q y. 1

In thedra'wings zg t v Figure 1 is a view inelevati'on of portions of twoedgewiseadjacent slabs, the edges thereof being slightly spaced apart.

Figure 2 is 1a sectional view through edgewise adjacent'slabs, showing the bonding of the two slabs connect-ed, curved 'boltsbeing employed for-this purpose.

Figure 3 is a; sectional View through two edge'wise" adjacent slabs and a 'third slab at right angles'to the first two slabs, with its edge overlying the joint or adjacent .Figure 4; shows views of the character of bolts that may be used. K d v Figuree-isa sectional view similar to Fig ureabutshowing placed in position blocks or strips acting to hold the loose concrete or motar during the filling operation.

broken-away showing {a form of moldj for making the slab constituting the invention.

toothed, serrated or otherwiseiot1ghened,

as indicated at 3, so as to insure holding the'slabs in position until they arebonded together.

In constructing concrete or cement slabs of this character, it isthe purpose to use shallow molds or frames position'flat on the ground or floor or one over another.

WVhile the molds or framesare designed to be shallow, it is obvious that they may be any depth-or. any size'or shape. However, at regular-intervals, affixed to the inner faces of the sidesof the molds or frames are suitablelugse which form gaps or notches 5 in the marginal edges of the'concrete slal when the same is complete and set.

"These lugst are hollowed out, as shown at 6, for the reception of-t'he looped ends 7- of the bonding rods are reenforcements 8.

In other Words, when molding 'a' concrete or cement slab, asdisclos ed, the longitudinal and transverse. bonding rods S are placed in position,s aid-lbondings being interwoven around-the bondings, and due to the provision of the lugs 4, tl1e slabs will have, when completelygmolded and set, gaps or notches 5. The loops 7 of the bondings have their entremities'rl'flush" with these serrated or "toothed edges of; the slabs, so as. notv to -invterfere :with :theedges of the slabs when tbe gslab a pla ed iii p sit en- Figurefijis adetail perspective view partly 'withjtheirjloopsfi resting in the. hollowed outijportions 6 of the'lugs 4. The concrete, "cement or: other plasticmaterial-"is then poured into the mold,',thereby filling up As shown in Figures 1 and 2, it is the purpose to connect or bond the loops 7 of the bondings together and in the present case it is the aim to use curved bolts 9, such as shown in Figures 2 and 3. It is obvious that the bolts may bemade in any shapes so as to hold and secure concrete or cement or other plastic slabs together and in various positions. However, where the slabs are held edgewise adjacent each other, as in Figure 2, the bolts 9 are curved semicircular, that is, the shanks of the bolts, so as to accommodate the shanks to the position of theloops of the bondings. As shown, the head of the bolt bears against one loop while a nut 10 is threaded on the other end of the bolt to not only hold the bolt in place but also to connect the bonds.

v The toothed or serrated edges of the slabs prevent movement or displacement of the slabs, particularly until the slabs are connected or united. After uniting the slabs in this way, it is possible to fill up the gaps or notches 5 and the spaces between the serrated edges with concrete, cement or other plastic material in order to insure a solid Wall.

As disclosed in Figure 3, a third slab is positioned with one of its edges adjacent the faces of two edgewise adjacent slabs, the third slab 11 also being provided with the bonding designated by the same character as in the other figures, and to hold this third slab in position, an additional bolt 12 is provided. The shank of this bolt has a slight curve at a point in close proximity to the head of the bolt, so that the greater portion of the shank may assumea position, as in Figure 3, whereby the nut 13 may bear upon the loop of one of the bondings and in turn upon the head of a bolt 9. This not only holds the bolt 9 in position until its nut ,or other fastening means '10 is screwed on but insures a rigid union between the several slabs. I

As previously stated, the notches or gaps 5 can receive a filler of concrete or cement to insure a solid union between the slabs of one wall and the slabs of a wall at right angles thereto. It is obvious that the bolts may be bent in any shape to suitthe purpose, that is, the positions of the walls.

A further reason for serrating or roughening theedges of the slabs is to mainly increase bonding and cementing between the slabs and to allow the penetration of the cementing medium or grout (which is rather thick but semi-fluid in consistency) without the necessity of the interposition of a separating medium.

The reason for the reenforcement loops not protruding beyond the edge of the slab is to prevent the former from displacement or bending in handling or transporting of the slabs, also to allow the tensioning of the reenforc-ement (by tightening the nuts) in the joints without the necessity of a separating medium between the slabs.

Where three slabs are joined in a common joint, the bolts mentioned alternate from right to left (heads versus nuts) every succeeding notch or gap, the stability of the connection being such that simple slabs with as little as three notches can be connected perfectly rigid (by bolts) even without cementing them together. This mode of connection also allows the tensionrng of the re enforcement in the joint (by tightenmg the nuts), thus obviating or minimizing the tendency of crack formation along joints, possibly caused by contraction and expansion of the slabs and vibration and laxity of bond connections which may lead to corrosion and failure of the bonds in the crack.

While in Figure 5 the construction is simithe slabs 1 and 2 to prevent the loss of the cement or grout. The rods 14 also pass through wood strips 16 which are triangular in cross section and are disposed in the corners adjacent where the slab 11 connects with the slabs 1 and 2, also acting to prevent the loss of the cement or grout. Suitable wedges 17 connect with theends of the rods 14 which are slotted to receive the wedges,'thereby retaining them in position and holding the loops 18 of the rods againstthe Wood strip 15. The strips 15 and 16 serve as temporary mold walls at the joint to retain the grout or concrete or cement when being poured to fill the joint.

The invention having been set forth, what is claimed is: I

1. In a building construction, aplurality of building slabs, certain of which are edgewise united, others of which havingitheir edge portions overlying the united edge portions of the first slabs, the edgewise united slabs having notches or openings, bondings embedded in the slab and having loops located in the notches, means connecting the loops, the slab with its edge overlying said united edges having bondings, means connecting the last bondings with certain of the loops of the first bondings, wood fillers in the corners adjacent the slab which overlies the edgewise united slabs, and means passing through the joint of the several slabs and through the fillers for bonding the structure together.

2. In a building construction, a plurality of building sla'bs, certain of which are edgewise united and provided with bondings embedded therein, others ofthe slabs having bondings and overlying the united edges o1 the first slabs, means for connecting the the slab overlying the joint between the edgewise united slabs, a Wood cover strip overlying the joint of the edgewise united slabs, and means passing through the cover strip and the joint between the severalslabs and through the fillers to insure rigidity.

3. In combination with the block elements of a masonry construction, a mechanical bond consisting of reenfor'cing rods embedded'in. said elements and provided with loop terminals and bent bolts spanning and engaging the loops ofthe rods of adjacent elements, and nuts attachedto the bolts at one extremity and bearing upon the loops for tensioning the rods when the nuts are tightened. I e

In testimony whereof he aflixes his signature.

FRED .REBELL.

Images