In the formulation of the cementing composition of the invention, it is preferable to employ gilsonite in an amount ranging from approximately one-half to approximately ten times by volume the amount of the cement utilized, depending upon the particular result desired.
The lower range is employed where maximum strength is important; the higher range where the various qualities imparted by the gilsonite are most important.
date_rangeNov 24' 2018 / Russia
date_rangeNov 24' 2018 / Russia
date_rangeAug 08' 2018 / Iran
date_rangeAug 07' 2018 / Iran