Threshold is a Peabody Award-winning documentary podcast about our place in the natural world. Each season, we take listeners on a journey into the heart of a complex environmental story, asking how we got here and where we might be headed. In our latest season, Hark, we hand the mic over to our planet-mates and investigate what it means to truly listen to nonhuman voices—and the cost if we don't. With mounting social and ecological crises, what happens when we tune into the life all around us? Threshold is nonprofit, listener-supported, and independently produced.
Brent Rollins hosts this episode as he talks with Fred Land, the founder and owner of Spray-Lock Concrete Protection. He sets the story straight on how the company and technology started.
Brent Rollins and Joshua Carroll, with Spray-Lock Concrete Protection, dive into the challenges of concrete workability. Raw material impacts are examined, and the guys discuss available technologies to offset some of these challenges.
Brent Rollins and Joshua Carroll, from Spray-Lock Concrete Protection, talk about the colorful history of how our modern concrete became what it is today.
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