Steel tubes and fittings for onshore and offshore pipelines. Internal lining with cement mortar

2015 ◽  
Keyword(s):  
Cement Mortar ◽  
Steel Tubes ◽  
Offshore Pipelines ◽  
Internal Lining

Expansion of Cement Mortar Mixing Expansive Agent under Different Curing Conditions and Compressive Strength in Constrained Conditions

2013 ◽  
Vol 405-408 ◽  
pp. 2534-2537 ◽  
Author(s):  
Yuan Yuan Wu ◽  
Yuan Peng ◽  
Yong Dao Liu ◽  
Li Li Jia
Keyword(s):  
Compressive Strength ◽  
Cement Mortar ◽  
Steel Tubes ◽  
Curing Conditions ◽  
Expansive Agent ◽  
Calcium Sulphoaluminate ◽  
Constrained Conditions ◽  
Concrete Filled Steel Tubes ◽  
Expansion Effect ◽  
Closed Environment

The expansion of cement mortar mixing expansive agent under standard curing and membrane curing conditions and compressive strength in constrained conditions are studied in this paper. Results show that the early expansion effect of calcium sulphoaluminate hydrate-calcium hydroxide expansive agent is obvious, mid-to late effect of magnesia expansive agent increase clearly. Compare with standard curing, the shrinkage of the basic cement mortar increase and expansion effect of expansive agent reduce under membrane curing. The expansion effect of expansive agent B is good and persistent under membrane curing, its applicable to used in the closed environment, such as concrete filled steel tubes. The compressive strength of mortar with expansion agent is a little more than the basic mortar under the condition of limit.

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