US2000977A - x xx means means of resurfacing concrete - Google Patents

Description

May 14, 1935. W. H. MOSELEY 2000,97?

MEANS OF RESURFACING CONCRETE PAVEMNT Original Filed Nov. l0, 1930 j illlllllllillll J @"1 3 f I v- LlltlllllllllUl Z www# Patented May 14, 1935 Yzimmer? PATENTIOFFICE j MEANS OF RESURFACING CONCRETE PAVEMENT William H. Moseley, Springfield, Ill., assignor of one-tenth to Samuel W. Banning, trustee,

Chicago, Ill.

Continuation of application `Serial No. 494,743, i November 10, 1930. This application August,` 1933. Serial No. 683,283 v t t p y 3 Claims.

`My invention :relates to the construction of retaining curbs'such as is commonly necessary to retain certain road `surfacing materials now in common use such as bricks', blocks, asphaltic .and 5 bituminouscompositions.V Y Y Aiparticular object` of my invention is to provide a method and means of resurfacing old roads where the wearing surface of such road has been rough 'and where aresurfacing of such road is i necessary to salvage the original road structure, and myinvention is particularly well adapted for Y the resurfacing of old concrete roads which have begun to crack up or-clisintegrate `from various causes.. I v

A further purpose of my invention is to provide an economical, simple ,and practical means of substantially holding resurfacing materials when they are laid onto a concrete slab for resurfacing purposes. j

I attain the objects of my invention bythe devicedescribed in the annexedspeciflcation, recited in the claims and illustrated inthe accompanying drawing in which like reference numerals indicate like parts in the. several figures, the same'being a continuationof application Serial No. 494,743, led Nov. l0, 1930.

Referring to the drawing 1 -Figure 1 isa cross section `of a pavementslab in a` *condition of failure', showing a reinforcing construction therefor and disclosing straight; rectangulanretaining curb members for the retention of the resurfacing materials thereon, and

in this case illustrating brick as the resurfacing material;v

Fig. 2 is a cross section of a road slab in a condition. of failure together with a cross section of brick resurfacing. placed `thereon and retained by an angle plate with outwardly projected flanges therefor;4 p'

tion in a condition `of `failure and showing a resurfacing thereof with -brick and disclosingfalong the sides a retaining curb ofcorrugated metal strips; Fig. 4 is a cross section of a road construction where the base has been disintegrating and where the surface has been covered by a layer of asphalt supported along the sides by retaining vcurbs in the form` of Va channel bar; i

vAFig. 5 is a cross section of a road construction showing signs of disintegration and resurfaced by brick or other suitable blocks and showing in connection therewith retaining curb plates substantially held in place by tie rods holding en- 55' gaging brackets supporting the retaining curb Fig. 3 is a cross section of a road slab construc- (Cl. 94-4) 1 i plates and pressing against the outside edge of the old slab;

Fig. 6 is a cross section of road slab resurfaced with brick after the slab has worn Yand showing a modified form of curb plate; f. 1 t .15'

Fig. 7 is a detail of a portion of a road slab disclosing a detail of an angle plate with theangle turned inland held in place by a tie rod;

Fig. 8 is a perspective disclosing the manner oi engaging the retaining curb plates by the tie rods either by bolt Vand nut holding means or by providinglocknotches on the ends of the tie rods and showing." an expansive connection between the adjacent aligned retaining curb members of myY invention; and y Fig. 9 is a perspective of a detail showing an expansive connection between adjacent ends of aligned retaining curb plate members. A

Referring in detail tothe construction of my inventionl andthe preferred manner of using the same I provide a novel and practical retaining curb plate for substantial aid in resurfacing road structures `that have hadV certain failures resulting from unusual strains andresultingin a partial disintegration of the surface ofthe old road structure. 1

In resurfacing the old road structures with brick or asphalt or other substantial and suitable materials it has been the common practice to build up along the sides a concrete shoulder for retaining the resurfacing materials and designed in a manner that is excessively expensive both in material used and labor requiredto lay it.

In recent years many miles of concrete slab pavements have been built and in connection with its normal use it has been clearly demonstrated that due to its inability to withstand exposure to the elements, expansion and contraction under temperature changes,` and the freezing of absorbed moisture, etc., such concrete slabs are beginning to crack and disintegrate to an alarm- `ing extent and unless resurfaced with some suitable wearing surfacethey will soon become total failures rand total losses. Y

In this connection the above mentioned con- 45 crete shoulder or curb has been commonly used in orderto provide a retaining wall to hold the resurfacing materials in position.

I propose to replace these expensive concrete curbs in connection'with such resurfacing jobs 50 by using relatively narrowrrnetal bands or strips or other suitable material placed in an upright positionalong'opposite sides or edges ofthe old road structure and running'parallel with it,

with the opposite plates held together with the V tie rods in a manner causing the lower edge of such metal retaining curbs to clamp against the massive outer edge of the old road structure or pavement, and permitting the upper portion of such retaining curb members to extend up above the surface of the old road structure far enough to provide a flanking plate or retaining curb for holding the new resurfacing materials placed upon the old road structure. In this manner a satisfactory curb may be obtained at a very great saving. It can also be very easily and quickly installed, since it eliminates the necessity for the usual curb excavations, the building of forms, the pouring of concrete, and the necessary delay incident to the curing and setting of the concrete, and is satisfactorily anchored against the massive road foundation afforded by the old road` the old road structure and be covered-over by the resurfacing materials used'.

It is obvious that when laid in such a manner and when the resurfacing materialgis in place.

it would form a very Astrong. structurefandany expansive movements, whether in the resurfacing materials or in the old structure, would tend to exert a pressure against the opposite body, thereby limiting such expansive movement andproviding a very strong construction of road.

It is the usual practice when resurfacing old road structures with the block type of material such as paving brick or wood blocks and the like to use a cushioning course over the base, such as sand, mastic sand composition, crushed limestone or the like, for the purpose of evening up any depressions which might exist in the old road structure; and for this reason the tie rods above mentioned may be embedded in and covered by such cushioning course. Thus the tie rods would never cause any unevenness or ridges in the surface of the nished pavement. In the event oi' using asphalt or bituminous surface coverings, it is not necessary that these tierods should rest on the surface of the old road structure, but they may be spaced therefrom so as to run through and be embedded in the general body of the composition used. v

In the drawing, Fig. 1 'discloses rectangle side plates I and 2 of the simplest design shown connected by a tie rod 3 lying across the top of the surface of the worn road slab 4 with a cushion' of mastic sand supporting a layer of resurfacing brick 6.

For the sake of illustration of the merits of my invention I show in Figures l, 2, 3, 4, 5, 6, '7 and 8, a failing concrete road slab or pavement 4 showing 'signs of disintegration. In Figures 1, 2, 3, 5, 6 and 7 I show a brick resurfacing material 6 over the old road structure. In Figures 1, 2, 3, 4 and 5 I show tie rods 3 of similar construction.

In Figure 5 I have shown' side plates I8 and I9 which are overlapped by clips 2U having inturned lower edges 2l which extend below the plates and abut against the massive Walls of the old road structure, and inthis case the tie rods 3 extend through both the side plates and the associated clips.

In Figures 7 and 8 there is shown a type of tie rod rectangular in cross section with notches 26 and 2l cut in the opposite edges so asto engage the retaining curb plate l as it lies fiat across the old road slab after being turned edgewise to be slipped through slots 28 in the curb member l.

In Figures 8 and Q, the overlapping curb plates I are connected by an expansion joint 28 wherein the offset overlying the plates is provided with a slot, and the other offset is provided with a pair of spaced bolts 36 and 3| extending therethrough and provided with detachable threaded nuts 32 and 33. The two bolts are used to hold the retaining curb plates substantially in longitudinal alignment.

In Figure 7 I show a retaining curb plate 34 with a topflange 35 turned in.

It will be noted that in order to strengthen by retaining curb'plates it is possible to roll ribs into them for reinforcements or to shape them in other forms in order to add strength.

The aligned retaining curb plates along the road structure may be joined together by bolting, riveting, welding or the like, and at suitable intervals provided with expansion joint connections for taking care of movements due to expansion and contraction. All such curb plates are preferably treated to resist rust by galvanizing or otherwise coating them as well as the tie rods, bolts, rivets and the like.

The tie rods may be fastened by being threaded on the ends and secured by nuts or by being riveted to the plates, or by the slotted locking arrangement illustrated in Fig. 8, or by Welding.

The present invention is of value in that it utilizes the old road structure as the basis or foundation for the new surface, and this is possible b'y reason of the fact that the old road, although more or less impaired on its surface, constitutes a massive closely integrated foundation for the new surfacing materials. Although the old road structurefmay be rough and uneven in spots, and more or' less cracked or disrupted, it nevertheless furnishes a vsubstantially continuous massive foundationpresenting vertical side edges against which the metallic side plates can secure an adequate bearing to resist lateral thrusts imposed upon the new surface. This is possible by reason of the fact that the tie rods engage the side plates near the center thereof, so that an outward thrust against the upper edges of the plate will be resisted by the contact of the lower edges against the massive side walls of the old road structure. The invention is directed to a combination in which the old road constitutes the foundation and in which the side plates are anchored in such a way as to prevent lateral displacement, thereby utilizing in full the structural values in the old road and at the same time securing the benefit of an increased road depth and smooth surface without waste of material or labor. Y

I claim:

l. In an invention of the class described, the

structure, said plates extending upwardly above the old road structure, a newly laid smooth surfaced layer of road surfacing materials overlying the old ,road structure and lling in the inequalities in the surface thereof and confined between the upstanding side plates and constituting a new road surface, and means for anchoring the side plates against lateral displacement under pressure.

2. In an invention of the class described, the combination of an old road structure of integrally massed hard materials presenting substantially vertical side edges and a top surface presenting irregularities in contour due to disintegration of the surface, longitudinally extending vertically standing rigid side plates on each side of the olcl road structure presenting their lower margins in flatwise contact and close abutment with the side edges of the old road structure, said plates extending upwardly above the old road structure, a newly laid smooth surfaced layer of road surfacing materials overlying the old road structure and confined between the upstanding side plates and constituting a new road surface filling in the inequalities in the surface of the-old road structure, and anchoring rods secured to the side plates intermediate their upper and lower edges and eX- tending inwardly and across the surface of the old road structure for anchoring theside plates at an intermediate point to afford resistance against lateral spreading of the surfacing material by abutment of the lower margins of the side plates against the sides of the old road structure.

3. In an invention of the class described, the combination of an old road structure of integrally massed hard materials presenting substantially vertical side edges and a top surface presenting irregularities in contour due to disintegration of the surface, longitudinally extending vertically standing rigid side plates on each side of the old road structure presenting their lower margins in flatwise contact and close abutment with the side edges of the old road structure, said plates extending upwardly above the old Yroad structure, a newly laid smooth surfaced layer of road surfacing materials overlying the old road structure and conned between the upstanding side plates and constituting a new road surface filling in the inequalities in the surface of the old road structure, and tie rods having their ends secured respectively to the side plates intermediate the upper and lower edges thereof and extending across the old road structure closely to the surface thereof and underneath the surface of the new surfacing materials for anchoring the side plates at an intermediate point to afford resistance against lateral spreading of the surfacing material by abutment of the lower margins yof the side plates against the sides of the old road structure.

WILLIAM H. MosELEY.

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