When pumpable, one-step, high-solids grouts hit the market in the late 1980s, solids content ranged from 20 percent to 30 percent. There were two-step pumpable grouts already in the market at that time and these were less than 20 percent solids.
I bet a lot of readers think they’re pretty careful — and environmentally considerate — when handling drilling fluids and solids byproducts.
But, I was thinking of this recently as I attended the Underground Construction Technology (UCT) event in Atlanta last month.
As I write these columns and think about different subjects, I seem to have more to say about certain procedures and products used in our industry than others.
Nitrogen oxides (NOx) and particulate matter (PM) are undeniable contributors to the formation of ground-level ozone and the presence of harmful airborne pollutants.