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Data from J.Z. Pei and Colleagues Advance Knowledge in Education Testing and Evaluation

March 5, 2014

By a News Reporter-Staff News Editor at Education Letter -- Investigators discuss new findings in Education Testing and Evaluation. According to news originating from Shijiazhuang, People's Republic of China, by VerticalNews correspondents, research stated, "Organic montmorillonite (OMMT) modified asphalt was prepared with the melting intercalation technology. The distribution of OMMT layers in matrix asphalt was characterized through x-ray diffraction (XRD) and transmission electron microscope (TEM), and the effect of OMMT on physical properties and dynamic rheology of matrix asphalt were studied as well."

Our news journalists obtained a quote from the research, "It was found that OMMT homogeneously dispersed in the modified asphalt and intercalated OMMT/asphalt nanocomposites were prepared by means of melt extrusion. Additionally, from the penetration, softening point, and dynamic shear rheometer (DSR) testing result, it was observed that the OMMT obviously improved the high-temperature stability, temperature serviceability, and rut resistance of the matrix asphalt."

According to the news editors, the research concluded: "The bending beam rheometer (BBR) results indicated that the OMMT modified asphalt with OMMT dosage of 3 % exhibited the lowest stiffness and highest resistance to low temperature cracking, and had less effect on the relaxation of stress in low temperature in comparison with OMMT modified asphalt with OMMT dosage of 1 % and 5 %. Furthermore, it was found that the optimal dosage of OMMT was 3 %."

For more information on this research see: Organic Montmorillonite Modified Asphalt Materials: Preparation and Characterization. Journal of Testing and Evaluation, 2014;42(1):19-26. Journal of Testing and Evaluation can be contacted at: Amer Soc Testing Materials, 100 Barr Harbor Dr, W Conshohocken, PA 19428-2959, USA.

The news correspondents report that additional information may be obtained from J.Z. Pei, Highway Adm Bur Hebei Prov, Shijiazhuang 050051, Hebei, People's Republic of China. Additional authors for this research include Y. Wen, Y.W. Li, Z.P. Zhang, X. Shi, J.P. Zhang, R. Li, L.L. Cao and Q.L. Du.

Keywords for this news article include: Asia, Shijiazhuang, People's Republic of China, Education Testing and Evaluation

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Source: Education Letter

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