Hope some of this helps
A good way to stabilize soil is to use dolomite lime (calcium-magnesium carbonate). Dolomitic lime acts slowly and continuously, so soil will remain pH stable for a few months.
Using fine size dolomite lime is important, coarser grades can take a year or longer to work. You can find fine size dolomite lime at any well stocked garden supply center.
Dolomite lime has been used by gardeners as a pH stabilizer for many years. It has a pH that is neutral (7.0). When added to soil in the correct proportions, it will stabilize soil at a pH near 7.0.
When growing in containers, add one cup of fine dolomite lime to each cubic foot of soil. Mix the dry soil thoroughly with the dolomite lime, then lightly water it. After watering, re-mix it and wait for a day or two before checking the pH. When growing in an outdoor garden, follow the dolomite lime manufacturers instructions
If you bought dolomite then don't stress. I use 1 cup per cf with my mix of peat. Peat comes in at 4-5 ph and after dolomite and many amendments and cooing I sit at 6.7. Love dolomite in conjunction with oyster shell flour.
Effects of Dolomite Source, Dolomite Rate and Fertilizer Rate on Change in pH of Growing Medium Leachate-
http://mrec.ifas.ufl.edu/foliage/resrpts/rh_95_4.htm