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Focus on destruction features of the rigid-flexible composite pavement interlayer, Crumb rubber modified asphalt, SBS and crumb rubber composite modified asphalt, SBS modified asphalt were prepared. High temperature stability performance, medium-temperature fatigue performance and adhesive property of three knds of interlaminar material were evaluated and compared. Test results show that high temperature PG grade of SBS and crumb rubber composite modified asphalt is PG82, which showed better high temperature stability. Moreover, crumb rubber modified asphalt has more soft at normal temperature which benefited to medium-temperature fatigue performance. Besides, SBS and crumb rubber composite modified asphalt possesses better interlaminar adhesive property with 60°C viscosity is 2430Pas. So SBS and crumb rubber composite modified asphalt is recommend as spraying asphalt material in rigid-flexible composite pavement interlayer, the results can provide certain reference.

The hydrophobic silica granular aerogels were synthesized via sol-gel synthesis followed by ambient pressure drying. The tetraethyloxylane (TEOS) was used as original precursor. The aerogels were analyzed using nitrogen adsorption, scanning electron microscopy (SEM) and laser particle size analyzer. It was found that the aerogel was mesoporous material with high surface area. The aerogels were prepared in grain form by dipping into disperse solution in order to adsorption application. The average particle size of the aerogel was controlled by pH and disperse solution volume. The pH also affected gel time. The aerogels were used to absorb phenol from water. The saturated adsorption amount could reach up to 145 mg•g-1.

It is difficult to apply the common nondestructive method to the pile with an inaccessible head condition. The Parallel Seismic test, however, is a promising method that can be used to deal with such difficulties. On the basis of the physical mechanism of P-wave and S-wave, comparisons of the characteristics of the volumetric and shear strain signals, as well as vertical and horizontal vibration signals have been made, providing the theoretical basis for adoption of P-wave and PS-wave as a combination.

Caprolactam modified casein(CA-CPL) was prepared by using casein and caprolactam firstly. Caprolactam modified casein/waterborne polyurethane composite (CA-CPL/WPU) was prepared from CA-CPL and WPU. Effect of compounding conditions, such as the WPU dosage, compounding temperature and compounding time on CA-CPL/WPU performance were investigated. The results indicated that: CA-CPL/WPU achieved superior comprehensive performance when the WPU dosage was 50%, the compounding temperature and the compounding time was 80°Cand 2 h respectively. Viscosity of CA-CPL/WPU decreased firstly with the increasing amount of WPU When the WPU dosage was lower than 30%, and then increased gradually when the WPU dosage was higher than 30%. The more the dosage of WPU used in the reaction, the less dilution stability CA-CPL/WPU had. Acidic resistance, alkali resistance and electrolyte resistance of CA-CPL/WPU seemed to be invariable after WPU was introduced , but water resistance and softness of the film were improved. FT-IR and DLS results indicated that via the compounding process, certain hydrogen bonding interaction in CA-CPL/WPU took place and the obtained CA-CPL/WPU had a small Z-average size and polydispersity.