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CPP and CPR techniques include slab stabilization, full- and partial-depth repair, dowel bar retrofit, cross stitching longitudinal cracks or joints, diamond grinding and joint and crack resealing. CPP and CPR methods, developed over the last 40 years, are used in lieu of asphalt overlays and bituminous patches to repair roads when longer ...
In civil engineering, concrete leveling is a procedure that attempts to correct an uneven concrete surface by altering the foundation that the surface sits upon. It is a cheaper alternative to having replacement concrete poured and is commonly performed at small businesses and private homes as well as at factories, warehouses, airports and on roads, highways and other infrastructure.
Degraded concrete and rusted, exposed reinforcement bar (rebar) on Welland River bridge of the Queen Elizabeth Way in Niagara Falls, Ontario. Concrete degradation may have many different causes. Concrete is mostly damaged by the corrosion of reinforcement bars due to the carbonatation of hardened cement paste or chloride attack under wet ...
A dowel bar retrofit (DBR) is a method of reinforcing cracks in highway pavement by inserting steel dowel bars in slots cut across the cracks. It is a technique which several U.S. states' departments of transportation have successfully used in repairs to address faulting in older jointed plain concrete pavements.
Various methods also are used to pre-cool the concrete mix in mass concrete structures. [ 125 ] Another approach to mass concrete structures that minimizes cement's thermal by-product is the use of roller-compacted concrete , which uses a dry mix which has a much lower cooling requirement than conventional wet placement.
In the United Kingdom, the method developed by Kirkpatrick, Rankin & Long [15] in 1984 and substantiated by testing a full-scale bridge in 1986 [16] first led to the introduction of new rules for the economic design of reinforced concrete beam and slab bridge decks in Northern Ireland. [17]