Concrete demolition and rock breaking has never been easier with Dexpan Expansive Demolition Grout. Dexpan is a powder with amazing 18,000 psi expansive strength when mixed with water. Poured into drilled holes, Dexpan can break concrete. [pdf]
Edward A.L. Roberts was awarded a patent in November 1866 for what would become known as the Roberts Torpedo, a device for increasing the flow of oil by using an explosion deep in a well. The new te. [pdf]
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