DosBond™ 30 provides expansion in cements cured at static temperatures up to 77 °C. It is a dry additive......
DosBond™ 10 Expansion Agent
The use of expansive cement can overcome and improve some shortcomings of ordinary cement slurry (cement will shrink in the setting process, which causes the cement sheath to crack and be permeable), and can enhance the density and the integrity of cement.
DosBond™ 10 provides expansion in any API class of cement (A, C, G or H). The product is a dry additive blend that improves bonding and zonal isolation. This additive helps control micro-channels, which provide a pathway for inter-zonal communication.
As the figure shows, at room temperature, expansion ratio ranges from 0.1-0.8% depending on the concentration used and remain more or less constant after 6 months of curing. At 60 °C, Expansion ratio also observed with class C and H slurries and ranges between 0.1-0.3%.
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