Jingtao Shi

Research Field

Sasobit is an additive to produce asphalt mixes suitable for the use at lower construction temperatures without sacrificing the mix properties. However, Sasobit damages the time–temperature superposition principle (TTSP) of asphalt. Therefore, it is difficult to characterize the constitutive equation of Sasobit-modified asphalt. This study has modeled the rheological response of Sasobit-modified bitumen (two types) using a combination of two different models that describe gel-asphalt and sol-asphalt, respectively. Sasobit-modified asphalt is cooled after heating, the wax forms a crystal network structure, and gel-asphalt is obtained. The creep process of Sasobit-modified asphalt can be described by a nonlinear model, which is accompanied by the damage of the network structure, and thus, sol-asphalt is obtained. The network structure change of the wax in the asphalt may explain the mechanism of deviation from TTSP, and the structural characteristics of Sasobit-modified asphalt could be clearly described by the combined model. This will provide a foundation for accurately acquiring the rheological properties of Sasobit-modified asphalt.

10.1080/10916466.2020.1767646

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Citations (4)

Two porous metal–organic frameworks (MOFs) based on mixed ligands: synthesis, structure and selective gas adsorption

CrystEngComm (2014)

Jingtao Shi Ke‐Fen Yue Bo Liu Chunsheng Zhou Yongliang Liu

Two new three-dimensional (3D) porous structures based on the mixed flexible and rigid organic ligands, [Cd1.5(bmip)(tpa)1.5(DMF)1.5]n (1) and [Co1.5(bmip)0.5(bpdc)1.5(DMF)2]n (2) (bmip = 1,3-bis(2-methylimidazolyl)propane, H2tpa = terephthalic acid, H2bpdc = biphenyl-4,4′-dicarboxylic acid, DMF = N,N-dimethylformamide) have been prepared under solvothermal conditions. Complex 1 contains a trinuclear Cd unit, in which the trinuclear Cd cluster acts as an eight-connected node with two pairs of flexible bmip and six rigid tpa ligands. Complex 2 exhibits a two-fold interpenetrated porous network based on a trinuclear Co cluster as eight-connected vertices with two flexible bmip and six rigid tpa ligands. Both 1 and 2 show selective gas adsorption of CO2 over N2 and H2. Furthermore, complex 1 displays an uncommon CO2 adsorption isotherm and hysteretic desorption behaviors at 195 K.

Selective adsorption

10.1039/c3ce41557k

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Citations (15)

Rheological property and stability of polymer modified asphalt: Effect of various vinyl-acetate structures in EVA copolymers

Construction and Building Materials (2017)

Ming Liang Shisong Ren Weiyu Fan Xin Xue Jingtao Shi

Vinyl acetate

Ethylene-vinyl acetate

10.1016/j.conbuildmat.2017.01.123

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Citations (67)