What is the durability of concrete?
Durability of concrete may be defined as the ability of concrete to resist weathering action, chemical attack, and abrasion while maintaining its desired engineering properties. Different concretes require different degrees of durability depending on the exposure environment and properties desired.
What is the durability problems of concrete?
Durability problems related to environmental causes include the following: steel corrosion, delamination, cracking, carbonation, sulfate attack, chemical attack, scaling, spalling, abrasion and cavitation.
What is durability structure?
Durability is the resistance to degradation of products, materials, buildings and other built assets over time. This can be a difficult property to assess – whilst a tough material may be hard to the touch but it may also be non-durable if it decomposes or is eroded in a relatively short period of time.
What are the basic principles of durability design of concrete structures?
Fundamental concepts for durability design of concrete structures include the structural performance deterioration, durability limit states (DLSs), and service life. On the basis of these concepts a durability design can be achieved through prescription‐based or performance‐based approaches.
How do you find the durability of concrete?
Concrete durability testing
- Absorption Tests. Description: Absorption testing is a common method of determining water resistance.
- Rapid Chloride Permeability test. Description: The Rapid Chloride Permeability (RCP) test is an electrical test used to estimate the durability of concrete.
- Water Permeability test.
What is durability problem?
The physical durability problems include aggregates that are susceptible to freezing and thawing or wetting and drying, as well as physical wear. Chemical durability problems are concerned with various forms of cement-aggregate reactions.
What is durability of an aggregate?
Aggregate durability is a characteristic that is critical to the quality of pavements. It is a term that generally describes the resistance of the aggregate to environmental, physical, and cyclical loading conditions, and is affected by temperature, load, moisture, chemical exposure, and freeze/thaw cycles.
How does aggregate durability vary with its porosity?
In general, low porosity aggregates are superior to those with high porosity. Low porosity aggregates are denser, have higher strength, and are more durable.