Concrete form tie, and concrete formwork comprising same

1. A tie for a concrete formwork, the tie comprising:

a tie anchor configured to be embedded in a block of insulating material, the tie anchor having a first connecting feature accessible from a concrete-facing surface of the block; and

a tie member fabricated of a single piece of material, comprising:

a second connecting feature shaped to slidably engage the first connecting feature in a direction along a length of the tie anchor to connect to the first connecting feature of the tie anchor,

a panel fastening plate defining an elongate panel fastening surface,

a central web connecting the second connecting feature and the panel fastening plate, and

at least one connector for connecting to an abutting tie member.

2. The tie of claim 1 , further comprising flanges extending laterally from the panel fastening plate and defining a portion of the panel fastening surface.

3. The tie of claim 1 , wherein the panel fastening surface extends the length of the panel fastening plate.

4. The tie of claim 1 , wherein the web has a linking feature formed in an edge thereof, the linking feature being sized to engage a connecting rod for linking the tie member to an adjacent tie member.

5. The tie of claim 4 , wherein the linking feature is a notch formed in the edge of the web, the notch being sized to receive the connecting rod.

6. The tie of claim 4 , wherein the linking feature is a pin formed in the edge of the web, the pin being sized to engage a bore formed in the connecting rod.

7. The tie of claim 1 , wherein the at least one connector comprises a connector at each longitudinal end of the panel fastening plate.

8. The tie of claim 1 , wherein the at least one connector comprises a connector at each end of the second connecting feature for connecting to said abutting tie member.

9. The tie of claim 1 used in a concrete formwork that includes

a plurality of blocks of insulating material arranged to define a side of the formwork, each block comprising at least two tie anchors embedded therein, each tie anchor having the first connecting feature accessible from a concrete-facing surface of the block;

at least two tie members, each tie member having a second connecting feature connected to the first connecting feature of a respective one of the tie anchors;

a connecting rod seated horizontally on two or more adjacent tie members, the connecting rod linking the two or more tie members; and

a panel fastened to the tie members, the panel and the blocks defining a volume into which concrete is to be poured.

10. The concrete formwork of claim 9 , wherein the panel is spaced from ends of the tie members by a plurality of spacers.

11. The concrete formwork of claim 10 , wherein the panel is fastened to the tie members by fasteners extending through the spacers.

12. The concrete formwork of claim 9 , wherein each tie member has at least one connector for connecting to a vertically abutting tie member.

13. The concrete formwork of claim 12 , wherein each tie member further comprises:

a panel fastening plate defining an elongate panel fastening surface; and

a central web connecting the panel fastening plate and the second connecting feature.

14. The concrete formwork of claim 13 , further comprising flanges extending laterally from the longitudinal panel fastening plate and defining a portion of the panel fastening surface.

15. The concrete formwork of claim 13 , wherein the web has a linking feature formed in an edge thereof, the linking feature being sized to engage the connecting rod.

16. The concrete formwork of claim 15 , wherein the linking feature is:

a notch formed in the edge of the web, the notch being sized to receive the connecting rod, or

a pin formed in the edge of the web, the pin being sized to engage a bore formed in the connecting rod.