US2129325A - Method for producing dilation slots in concrete road surfaces - Google Patents
Method for producing dilation slots in concrete road surfaces Download PDFInfo
- Publication number
- US2129325A US2129325A US83153A US8315336A US2129325A US 2129325 A US2129325 A US 2129325A US 83153 A US83153 A US 83153A US 8315336 A US8315336 A US 8315336A US 2129325 A US2129325 A US 2129325A
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- US
- United States
- Prior art keywords
- concrete
- slot
- slots
- road surfaces
- dilation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/02—Arrangement or construction of joints; Methods of making joints; Packing for joints
- E01C11/04—Arrangement or construction of joints; Methods of making joints; Packing for joints for cement concrete paving
- E01C11/10—Packing of plastic or elastic materials, e.g. wood, resin
Definitions
- cement macadam surfaces it is necessary to provide vertical slots filled with some suitable elastic material at certain intervals, so as to allow a certain freedom of movement to the sections of the road surface during the dilation and contraction taking place owing to changes in temperature.
- Such elastic boards or strips have to be put in place before the concrete road surface is finished, which means concrete covering is thicker than in its nished state.
- the dilation slots are formed -after the mixture of stones and cement sand mortar has taken place and the mixture has been exposed to a preliminary treatment by means of rollers, harrows, plungers or the like by forming a groove in the still soft concrete and inserting in the said groove a board provided with an upwardly directed longitudinal slot.
- the height of the board ischosen somewhat less than the thickness of the finished road surface, and in the upwardly directed longitudinal slot of the board there is placed a wedge shaped steel ribbon, which is pressed so far down that its upper edge is Iiush with the upper surface of the unfinished concrete.
- the wedge shaped steel ribbon is rst replaced by an ordinary wooden wedge of the same shape and size, and when the concrete is finally hardened, the said provisional wooden Wedge is removed and the top of the slot is i'illed with an asphalt compound or with a thinner strip of Wood covered with an asphalt compound in order to make the top of 45 the slot watertight.
- Figure l is a section through the slot and the slot board before the finishing.
- the slot board 2 is put in place and the soft concrete has been packed well about it on both sides.
- the slot board 2 has an upwardly directed longitudinal slot 3, in
- the wedge shaped steel ribbon 4 is pressed into the slot 3 as indicated on Figure 2, whereupon the steel ribbon l is removed to be replaced by a strip of wood of the same shape and size, which remains in place until the hardening of the concrete is nished, whereupon the said provisional strip of wood is replaced by an asphalt compound or with a thinner strip of wood 5 covered with a layer of an asphalt compound 6.
- a method of providing expansion joints in concrete road surfaces comprises forming grooves in the unfinished and unhardened concrete, placing in said grooves means of a height less than the thickness of the nished concrete layer and having an upwardly directed longitudinal slot, placing a wedge-shaped bar with its edge in said upwardly directed slot and with its base substantially flush with the surface of the unlinished concrete, compressing said concrete by rolling and simultaneously pressing the wedge-shaped bar further into said slot so that its surface remains substantially ush with the concrete after the latter has been rolled, removing said bar, and finally, after the concrete has hardened, filling with plastic water-tight material the space previously occupied by said bar.
- a method of providing expansion joints in concrete road surfaces comprises forming grooves in the unfinished and unhardened concrete, placing in said grooves boards of a height less than the thickness of the nished concrete layer and having an upwardly directed longitudinal slot, placing a wedge-shaped metal bar with its edge in said upwardly directed slot and with its base substantially flush with the surface of the unfinished concrete, compressing said concrete by rolling and simultaneously pressing the wedge-shaped bar further into said slot so that its surface remains substantially ush with the concrete after the latter has been rolled, removing said bar while said boards remain in place, and replacing it with a strip of wood of the same shape, and finally, after the concrete has hardened, removing said strip of wood and filling with plastic water-tight material the space previously occupied by said bar and strip.
- a method of providing expansion joints in concrete road surfaces comprises forming groovesin the unfinished and unhardened concrete, placing in said grooves boards of a height less than the thickness of the finished crete after the latter has been rolled, removing said bar While said boards remain in place, and finally, after the concrete has hardened, placing a strip of wood covered with a plastic Water-tight material in the space previously occupied by said 5 bar.
Description
A. HOLTER sept. e, 1938.
METHOD FOR PRODUGING DILATION SLOTS IN CONCRETE ROAD `SURFACES Filed June 2, 1936 ...L ....2 L.. J1.. ....Z. n". ...cf-an... a c nl u .1 I... 1.... l u l..ln\`\\\\`\`\"\`.
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Patented Sept. 6, 1938 PATENT OFFICE METHOD` FOR PRODUCING DILATION SLOTS IN CONCRETE ROAD SURFACES Alfred Holter, Oslo, Norway Application June 2, 1936, Serial No. 83,153 In Norway June 29, 1935 3 Claims.
1n concrete road surfaces (cement macadam surfaces) it is necessary to provide vertical slots filled with some suitable elastic material at certain intervals, so as to allow a certain freedom of movement to the sections of the road surface during the dilation and contraction taking place owing to changes in temperature. Such elastic boards or strips have to be put in place before the concrete road surface is finished, which means concrete covering is thicker than in its nished state.
In accordance with the present invention the dilation slots are formed -after the mixture of stones and cement sand mortar has taken place and the mixture has been exposed to a preliminary treatment by means of rollers, harrows, plungers or the like by forming a groove in the still soft concrete and inserting in the said groove a board provided with an upwardly directed longitudinal slot.
The height of the board ischosen somewhat less than the thickness of the finished road surface, and in the upwardly directed longitudinal slot of the board there is placed a wedge shaped steel ribbon, which is pressed so far down that its upper edge is Iiush with the upper surface of the unfinished concrete.
During the rolling of the concrete road surface to obtain the final compression of the concrete the said steel ribbon is pressed downwards into the slot of the board, whereby a smooth dilation slot is obtained with the adjacent concrete sections being compressed in exactly the same manner as the rest of the concrete surface.
When the rolling is finished the wedge shaped steel ribbon is rst replaced by an ordinary wooden wedge of the same shape and size, and when the concrete is finally hardened, the said provisional wooden Wedge is removed and the top of the slot is i'illed with an asphalt compound or with a thinner strip of Wood covered with an asphalt compound in order to make the top of 45 the slot watertight.
On the drawing three different stages of the process are illustrated on Figures l, 2 and 3, showling cross sections of a dilation slot and the adjacent concrete.
On all figures the concrete is indicated with l.
Figure l is a section through the slot and the slot board before the finishing. The slot board 2 is put in place and the soft concrete has been packed well about it on both sides. The slot board 2 has an upwardly directed longitudinal slot 3, in
that they must be put in place at a time when the A the upper part of which is inserted the lower edge of the wedge shaped steel ribbon 4.
During the finishing rolling operation the wedge shaped steel ribbon 4 is pressed into the slot 3 as indicated on Figure 2, whereupon the steel ribbon l is removed to be replaced by a strip of wood of the same shape and size, which remains in place until the hardening of the concrete is nished, whereupon the said provisional strip of wood is replaced by an asphalt compound or with a thinner strip of wood 5 covered with a layer of an asphalt compound 6.
1' claim:
l. A method of providing expansion joints in concrete road surfaces, which method comprises forming grooves in the unfinished and unhardened concrete, placing in said grooves means of a height less than the thickness of the nished concrete layer and having an upwardly directed longitudinal slot, placing a wedge-shaped bar with its edge in said upwardly directed slot and with its base substantially flush with the surface of the unlinished concrete, compressing said concrete by rolling and simultaneously pressing the wedge-shaped bar further into said slot so that its surface remains substantially ush with the concrete after the latter has been rolled, removing said bar, and finally, after the concrete has hardened, filling with plastic water-tight material the space previously occupied by said bar.
2. A method of providing expansion joints in concrete road surfaces, which method comprises forming grooves in the unfinished and unhardened concrete, placing in said grooves boards of a height less than the thickness of the nished concrete layer and having an upwardly directed longitudinal slot, placing a wedge-shaped metal bar with its edge in said upwardly directed slot and with its base substantially flush with the surface of the unfinished concrete, compressing said concrete by rolling and simultaneously pressing the wedge-shaped bar further into said slot so that its surface remains substantially ush with the concrete after the latter has been rolled, removing said bar while said boards remain in place, and replacing it with a strip of wood of the same shape, and finally, after the concrete has hardened, removing said strip of wood and filling with plastic water-tight material the space previously occupied by said bar and strip.
3. A method of providing expansion joints in concrete road surfaces, which method comprises forming groovesin the unfinished and unhardened concrete, placing in said grooves boards of a height less than the thickness of the finished crete after the latter has been rolled, removing said bar While said boards remain in place, and finally, after the concrete has hardened, placing a strip of wood covered with a plastic Water-tight material in the space previously occupied by said 5 bar.
ALFRED HOLTER.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO2129325X | 1935-06-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2129325A true US2129325A (en) | 1938-09-06 |
Family
ID=19914886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US83153A Expired - Lifetime US2129325A (en) | 1935-06-29 | 1936-06-02 | Method for producing dilation slots in concrete road surfaces |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2129325A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2479434A (en) * | 1943-12-11 | 1949-08-16 | William J Van London | Method of constructing center parting and contraction joints and sealing expansion joints in pavements |
| US2539875A (en) * | 1943-12-11 | 1951-01-30 | William J Van London | Expansion joint filler for existing concrete pavements |
| US3132571A (en) * | 1960-05-02 | 1964-05-12 | Lin W Bowling | Cementitious slab and means and method for forming same with lines of weakness |
-
1936
- 1936-06-02 US US83153A patent/US2129325A/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2479434A (en) * | 1943-12-11 | 1949-08-16 | William J Van London | Method of constructing center parting and contraction joints and sealing expansion joints in pavements |
| US2539875A (en) * | 1943-12-11 | 1951-01-30 | William J Van London | Expansion joint filler for existing concrete pavements |
| US3132571A (en) * | 1960-05-02 | 1964-05-12 | Lin W Bowling | Cementitious slab and means and method for forming same with lines of weakness |
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