Use of Blast-Furnace Slag Cements in the Boreholes in Salt Beds

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Title: Use of Blast-Furnace Slag Cements in the Boreholes in Salt Beds

Author(s): W. Brylicki, J. Malolepszy, and S. Stryczek

Publication: Special Publication

Volume: 132

Issue:

Appears on pages(s): 1583-1600

Keywords: blast furnace slag; blended cements; boreholes; corrosion; expansion; pastes; rheological properties; shrinkage; strength; Materials Research

Date: 5/1/1992

Abstract:
The lining of underground cavities for storage of natural gas requires a proper cementing paste as does the cementing of casing in boreholes placed in salt beds. The following properties of the cementing pastes are required: high corrosion resistance, minimal shrinkage, even some expansion, high leak tightness, good bond to steel and rock, proper rheology and strength. The following blended cements were investigated: cement "Nowa Huta" 25 with 40% blast-furnace slag (bfs), cement "Rejowiec" 45 for bridge construction and cement with 70% bfs. The cements were mixed with NaCl brine at a concentration 310 g NaCl/L at liquid to solid ration 0.45. The properties of pastes, such as density, rheological, sedimentation and filtration characteristics; time of setting; strength development and shrinkage were determined. The phase composition of pastes was studied by XRD and the microstructure was observed under SEM. The best results were obtained for the pastes with the blast-furnace slag.