contraction joint

contraction joint

[kən′trak·shən ‚jȯint]
(civil engineering)
A break designed in a structure to allow for drying and temperature shrinkage of concrete, brickwork, or masonry, thereby preventing the formation of cracks.

contraction joint

1. An expansion joint, 1.
2. A joint between adjacent parts of a structure which permits movement between them resulting from contraction.
References in periodicals archive ?
Tenders are invited for Cleaning and filling expansion joints and contraction joint with bitumin and sand of lining in km 1 to 10 of glbc
In each location where a contraction joint or header is planned, cut forming material, set it on edge, place flush with the top of the forms, and connect.
In addition to these predictive abilities, the software developers added modules for predicting the potential of early-age damage to JPCP and bonded concrete overlays, guidelines for timing contraction joint sawing, guidelines for early traffic loading of JPCP, and evaporation rate guidelines to predict the potential for moisture loss in portland cement concrete pavements.
Formulas are provided for calculating the heights of objects, quantities of rip-rap, the length of French drains, edge restraint, contraction joint spacing in concrete, and wood material calculations.
In this proposal, an expansion and contraction joint would be provided at the crown interface of the barrel and groined arches along the entire length around the perimeter of each basin.
53 base, joint adhesive surface & intermediate, liquid asphalt sealant, asphalt for tack coat, d-1 contraction joint, hma for sidewalk, sidewalk, concrete, curb ramp, concrete, curb and gutter, roll curb, riprap, revetment, seeding & mulching material, fertilizer , permanent, seed mixture, sodding, pipe, circular type(2 &4) in.
MasterFiber MAC 2200 CB imparts tighter crack control; extends joint spacing; improves load transfer at contraction joints; and, justifies slab thickness reduction.
This can result in vertical cracks appearing in the internal and external walls if expansion and contraction joints are not correctly installed during the construction of the building.
The slab-on-ground is 6 1/2 inches thick (reinforced with welded-wire fabric) with contraction joints at 20 feet on center each way.
It also can be used to cut expansion joints or contraction joints to improve the appearance of the slabs.
The new system would require the reduction of the number of construction and contraction joints, elimination of steel bar reinforcement, and control of concrete cracking induced by temperature and drying shrinkage.
For these improvements, it is essential to place transverse contraction joints (typical sawed joints, either doweled or undoweled depending on the thickness) that match any existing joints or cracks in the adjacent pavement.