CA2274239C - Concrete masonry reinforcement - Google Patents
Concrete masonry reinforcement Download PDFInfo
- Publication number
- CA2274239C CA2274239C CA 2274239 CA2274239A CA2274239C CA 2274239 C CA2274239 C CA 2274239C CA 2274239 CA2274239 CA 2274239 CA 2274239 A CA2274239 A CA 2274239A CA 2274239 C CA2274239 C CA 2274239C
- Authority
- CA
- Canada
- Prior art keywords
- rings
- reinforcement
- reinforcing
- wall
- strands
- 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
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/02—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/02—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls built-up from layers of building elements
- E04B2/14—Walls having cavities in, but not between, the elements, i.e. each cavity being enclosed by at least four sides forming part of one single element
- E04B2/16—Walls having cavities in, but not between, the elements, i.e. each cavity being enclosed by at least four sides forming part of one single element using elements having specially-designed means for stabilising the position
- E04B2/20—Walls having cavities in, but not between, the elements, i.e. each cavity being enclosed by at least four sides forming part of one single element using elements having specially-designed means for stabilising the position by filling material with or without reinforcements in small channels in, or in grooves between, the elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/02—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls built-up from layers of building elements
- E04B2/14—Walls having cavities in, but not between, the elements, i.e. each cavity being enclosed by at least four sides forming part of one single element
- E04B2/24—Walls having cavities in, but not between, the elements, i.e. each cavity being enclosed by at least four sides forming part of one single element the walls being characterised by fillings in some of the cavities forming load-bearing pillars or beams
Abstract
In a partially grouted concrete masonry wall, the bed joint reinforcement is provided by a set of rings spaced along the mortar between two adjacent courses of blocks and wire strands on opposite sides of the rings. Each of the grouted cells of the wall is surrounded by reinforcing rings embedded in the mortar. The rings support the columns of grouting in the wall and more effectively transfer loads to the bed joint reinforcement than does conventional truss or ladder style bed joint reinforcement. Between courses where bed joint reinforcement is not used, independent rings may be employed to support the grouting columns.
Description
CONCRETE MASONRY REINFORCEMENT
FIELD OF THE INVENTION
The present invention relates to the reinforcement of partially grouted concrete masonry walls.
BACKGROUND
Partially grouted concrete masonry walls of the type in question conventionally have two types of reinforcement. Vertical reinforcement in the form of rebar is used in the grouted cells of the wall. Horizontal reinforcement is provided by bed joint reinforcement, typically in a "ladder" or "truss" configuration. In such structures, the full capacity of the reinforcement is not utilized because of the mismatch between the elastic modulus of the steel of the reinforcement and that of the mortar used in fabricating the wall. In addition, the difference between the Poisson's ratios of the steel and the concrete grout causes the concrete to split prematurely.
The present invention aims at the provision of mechanisms to improve utilization of the reinforcement.
SUMMARY
According to one aspect of the present invention there is provided a reinforcement for use in a concrete block wall comprising:
a plurality of blocks arranged in plural courses, the blocks having hollow cores that align in upright cells through the courses at intervals along the wall;
mortar joining adjacent blocks;
grouting filling selected ones of the cells; and reinforcing strands along each of the selected cells, said reinforcement comprising a plurality of reinforcing rings each surrounding the grouting in a respective one of the selected cells between two adjacent courses.
_2_ The rings support the column of grouting where it passes through the mortar joint between the blocks, thus mitigating the differences in properties between the reinforced cell grouting, the mortar and the reinforcement.
According to another aspect of the present invention there is provided bed joint reinforcement for a concrete masonry wall that is at least partially grouted, said reinforcement comprising:
a pair of spaced apart, substantially parallel side strands; and a plurality of rings joining the side strands, substantially parallel to the side strands.
When the reinforcement is installed, the rings surround the grouted cells in the wall and transfer loads directly from the grouting columns to the side strands to reinforce the wall horizontally and reduce stress concentrations.
At the same time, the rings support the columns of grout as discussed above.
The invention also provides, according to other aspects thereof, walls incorporating the reinforcing rings and the bed joint reinforcement.
The rings may be of any suitable shape, for example circular, square or other polygon. They are preferably formed from round steel wire. The side stands are preferably steel wire, flattened to present an oblong profile with a height approximately equal to that of the rings. It is preferred that the rings are co-planar with the side strands and welded tangentially to them. The rings may also be lapped and welded, but this increases the thickness of the reinforcement.
BRIEF DESCRIPTION OF THE DRAWINGS
In the accompanying drawings, which illustrate exemplary embodiments of the present invention:
Figure 1 is an elevation of a masonry wall;
Figure 2 is a plan view of a bed joint reinforcement;
Figure 3 is a cross section on line 3 - 3 of Figure 2;
Figure 4 is a view along line 4 - 4 of Figure 1; and Figure 5 is an exploded isometric of the wall.
DETAILED DESCRIPTION
Referring to the accompanying drawings, Figure 1 illustrates a wall 10 composed of masonry blocks 12 arranged in superimposed courses 14. The joints between adjacent courses and between adjacent blocks in the same course are formed with mortar 18. The blocks are hollow core blocks with two cavities 19 (Figures 4 and 5) per block. The cavities align through the courses to provide vertical cells 20 through the wall. At intervals along the wall, the cells have vertical steel reinforcing rods 22 extending along their centers. The rods are embedded in grout 23 (Figures 4 and 5). The grout forms, with the vertical reinforcing rods, vertical columns in the wall's structure.
The wall is also reinforced horizontally with bed joint reinforcement between selected adjacent courses of the blocks. As illustrated in Figures 2 through 5, the bed joint reinforcement 24 includes two parallel side rods 26. These are steel rods flattened in their vertical dimension to present an oval profile. The rods are joined by cross links, which are rings 28 that align with cells 20 in the wall. As illustrated in Figures 4 and 5, rings are provided to align with alternate cells along the wall, although in the illustrated wall, only every sixth cell is grouted.
As shown in the exploded view of Figure 5, the bed joint reinforcement 24 is used in alternate joints. In the intervening joints rings 30 are embedded in the mortar around the grouted cells to confine the grout 23.
With this structure, the rings 28 and 30 confine the grouted cells where they pass through the mortar to support the columns. The rings that are incorporated into the bed joint reinforcement transfer loads between the cells and the steel side rods 26 to provide a more effective use of the strength of the side rods 26 than would be the case if the loads were to be transferred to the side rods through the mortar.
While particular embodiments of the invention has been described in the foregoing, it is to be understood that other embodiments are possible within the scope of the invention and are intended to be included herein. Thus, for example, the rings of the illustrated embodiment are circular in shape but other shapes may be employed, including various polygons. The rings are shown parallel to and co-planar with the side rods and welded to them at the points of contact. In other embodiments, the rings may overlap the side rods, although this is not a preferred construction. At those locations where there is no vertical reinforcement, the rings may be omitted, and the side rods connected by straight bars. The invention is therefore to be considered limited solely by the scope of the appended claims.
FIELD OF THE INVENTION
The present invention relates to the reinforcement of partially grouted concrete masonry walls.
BACKGROUND
Partially grouted concrete masonry walls of the type in question conventionally have two types of reinforcement. Vertical reinforcement in the form of rebar is used in the grouted cells of the wall. Horizontal reinforcement is provided by bed joint reinforcement, typically in a "ladder" or "truss" configuration. In such structures, the full capacity of the reinforcement is not utilized because of the mismatch between the elastic modulus of the steel of the reinforcement and that of the mortar used in fabricating the wall. In addition, the difference between the Poisson's ratios of the steel and the concrete grout causes the concrete to split prematurely.
The present invention aims at the provision of mechanisms to improve utilization of the reinforcement.
SUMMARY
According to one aspect of the present invention there is provided a reinforcement for use in a concrete block wall comprising:
a plurality of blocks arranged in plural courses, the blocks having hollow cores that align in upright cells through the courses at intervals along the wall;
mortar joining adjacent blocks;
grouting filling selected ones of the cells; and reinforcing strands along each of the selected cells, said reinforcement comprising a plurality of reinforcing rings each surrounding the grouting in a respective one of the selected cells between two adjacent courses.
_2_ The rings support the column of grouting where it passes through the mortar joint between the blocks, thus mitigating the differences in properties between the reinforced cell grouting, the mortar and the reinforcement.
According to another aspect of the present invention there is provided bed joint reinforcement for a concrete masonry wall that is at least partially grouted, said reinforcement comprising:
a pair of spaced apart, substantially parallel side strands; and a plurality of rings joining the side strands, substantially parallel to the side strands.
When the reinforcement is installed, the rings surround the grouted cells in the wall and transfer loads directly from the grouting columns to the side strands to reinforce the wall horizontally and reduce stress concentrations.
At the same time, the rings support the columns of grout as discussed above.
The invention also provides, according to other aspects thereof, walls incorporating the reinforcing rings and the bed joint reinforcement.
The rings may be of any suitable shape, for example circular, square or other polygon. They are preferably formed from round steel wire. The side stands are preferably steel wire, flattened to present an oblong profile with a height approximately equal to that of the rings. It is preferred that the rings are co-planar with the side strands and welded tangentially to them. The rings may also be lapped and welded, but this increases the thickness of the reinforcement.
BRIEF DESCRIPTION OF THE DRAWINGS
In the accompanying drawings, which illustrate exemplary embodiments of the present invention:
Figure 1 is an elevation of a masonry wall;
Figure 2 is a plan view of a bed joint reinforcement;
Figure 3 is a cross section on line 3 - 3 of Figure 2;
Figure 4 is a view along line 4 - 4 of Figure 1; and Figure 5 is an exploded isometric of the wall.
DETAILED DESCRIPTION
Referring to the accompanying drawings, Figure 1 illustrates a wall 10 composed of masonry blocks 12 arranged in superimposed courses 14. The joints between adjacent courses and between adjacent blocks in the same course are formed with mortar 18. The blocks are hollow core blocks with two cavities 19 (Figures 4 and 5) per block. The cavities align through the courses to provide vertical cells 20 through the wall. At intervals along the wall, the cells have vertical steel reinforcing rods 22 extending along their centers. The rods are embedded in grout 23 (Figures 4 and 5). The grout forms, with the vertical reinforcing rods, vertical columns in the wall's structure.
The wall is also reinforced horizontally with bed joint reinforcement between selected adjacent courses of the blocks. As illustrated in Figures 2 through 5, the bed joint reinforcement 24 includes two parallel side rods 26. These are steel rods flattened in their vertical dimension to present an oval profile. The rods are joined by cross links, which are rings 28 that align with cells 20 in the wall. As illustrated in Figures 4 and 5, rings are provided to align with alternate cells along the wall, although in the illustrated wall, only every sixth cell is grouted.
As shown in the exploded view of Figure 5, the bed joint reinforcement 24 is used in alternate joints. In the intervening joints rings 30 are embedded in the mortar around the grouted cells to confine the grout 23.
With this structure, the rings 28 and 30 confine the grouted cells where they pass through the mortar to support the columns. The rings that are incorporated into the bed joint reinforcement transfer loads between the cells and the steel side rods 26 to provide a more effective use of the strength of the side rods 26 than would be the case if the loads were to be transferred to the side rods through the mortar.
While particular embodiments of the invention has been described in the foregoing, it is to be understood that other embodiments are possible within the scope of the invention and are intended to be included herein. Thus, for example, the rings of the illustrated embodiment are circular in shape but other shapes may be employed, including various polygons. The rings are shown parallel to and co-planar with the side rods and welded to them at the points of contact. In other embodiments, the rings may overlap the side rods, although this is not a preferred construction. At those locations where there is no vertical reinforcement, the rings may be omitted, and the side rods connected by straight bars. The invention is therefore to be considered limited solely by the scope of the appended claims.
Claims (6)
1. A joint reinforcement for use in a concrete block wall, the concrete block wall including a plurality of blocks arranged in plural courses, the blocks having hollow cores that align in upright cells through the courses at intervals along the wall, mortar joining adjacent blocks, and grouting filling selected ones of the cells, said reinforcement comprising:
a plurality of reinforcing strands along each of the selected cells, wherein the strands are unembedded in the grouting; and a plurality of reinforcing rings connected to the reinforcing strands, each reinforcing ring surrounding the grouting in a respective one of the selected cells between two adjacent courses.
a plurality of reinforcing strands along each of the selected cells, wherein the strands are unembedded in the grouting; and a plurality of reinforcing rings connected to the reinforcing strands, each reinforcing ring surrounding the grouting in a respective one of the selected cells between two adjacent courses.
2. A reinforcement according to Claim 1 wherein the rings are steel reinforcing rings.
3. A reinforcement according to Claim 2 including pairs of reinforcing strands extending along the wall between adjacent courses, the strands being embedded in the mortar on opposite sides of the hollow cores.
4. A reinforcement according to Claim 3 wherein the reinforcing strands are wire strands.
5. A reinforcement according to Claim 3, 4 or 5 wherein the reinforcing strands have an oblong profile.
6. A reinforcement according to any one of Claims 2 through 5 wherein the reinforcing rings are round wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2274239 CA2274239C (en) | 1999-06-10 | 1999-06-10 | Concrete masonry reinforcement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2274239 CA2274239C (en) | 1999-06-10 | 1999-06-10 | Concrete masonry reinforcement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2274239A1 CA2274239A1 (en) | 2000-12-10 |
| CA2274239C true CA2274239C (en) | 2006-03-14 |
Family
ID=30774303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2274239 Expired - Lifetime CA2274239C (en) | 1999-06-10 | 1999-06-10 | Concrete masonry reinforcement |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2274239C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113958028B (en) * | 2021-11-05 | 2023-06-30 | 上海结奕建筑咨询事务所 | Prefabricated external wall panel of steel construction |
-
1999
- 1999-06-10 CA CA 2274239 patent/CA2274239C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2274239A1 (en) | 2000-12-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20190610 |