TxDOT Tests 'X-Ray Gun' to Measure Asphalt Quality

TTI's "X-Ray Gun," developed after two years' of research, quickly identifies the chemical composition of asphalt pavement materials, whatever their form — solid, liquid, etc. — and can also sometimes be used to determine the thickness and composition of layers and coatings. TTI noted that its XRF device — which resembles the size and shape of a grocery store scanner — detects the presence and "intensities" of key elements that reveal whether re-refined engine oil bottom additives or REOBs exists and estimates the amount in the binder being tested....

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