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Indirect Tensile Loading Fixtures (Lottman Breaking Heads) are used with conventional Marshall Stability load frames to determine Indirect Tensile (IDT), or Lottman values of asphalt mixes. Models are available for 4in (102mm) or 6in (152mm) specimens and consist of a base with upright guide rods and a top with mating guide sleeves. The upper and lower stainless steel loading strips have concave contact surfaces.
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