High prestressed

In practice compound shrinkage is often used to prestress a high strength or corrosion-resistant liner. The optimum radius ratios of components of different yield strengths have been shown (37,38) to be... 

For high, heavy tanks, a foundation ring may be needed. Prestressed concrete tanks are sufficiently heavy to require foundation rings. Foundations must extend below the frost line. Some tanks that are not flat-bottomed may also be supported by soil if it is suitably... 

Cathodic protection cannot work with prestressed concrete structures that have electrically insulated, coated pipes. There is positive experience in the case of a direct connection without coated pipes this is protection of buried prestressed concrete pipelines by zinc anodes [38], Stability against H-induced stress corrosion in high-strength steels with impressed current has to be tested (see Section 2.3.4). 

For prestressed concrete, either high-tensile steel wires or occasionally bars of steel alloy containing manganese and silicon, can be used. Galvanised wires may also be used for prestressed concrete, but it is recommended that they be chromated before use. 

Table 5.5 Effect of CaCI2 on corrosion of high tensiie steei wires in normaiiy cured prestressed concrete specimens stored outdoors...

Table 7.28 The use of a hydroxycarboxylic-acid-based water-reducing agent to produce a more economical high-strength mix for prestressed, precast units...

High Range Water-Reducer Committee Recommended Practice. (1980). Draft of the Prestressed Concrete Institute. 

---