Semi-flexible pavement (SFP) has some excellent characteristic such as high carrying capacity, good wearing resistance, water stability and durability. However, the SFP appears low temperature crack and fatigue cracking seriously because there are large differences in the interfacial bonding property and the elastic modules between its two major parts: Lag gap asphalt mixture (LGAM) and cement mortar. All of these are caused by the large stiffness of cement mortar. In order to improve the crack resistance property of SFP, six kinds of cement-emulsified asphalt mortars (CEAM) were developed to enhance the adhesive property and reduce the elastic modules. The cement-emulsified asphalt mortar semi-flexible pavement material (CEAMSFP) was obtained by using this kind of CEAM. In the CEAM and the CEAMSFP, six emulsified asphalt-to-cement (A/C) ratios were considered in the study: 0, 0.1, 0.2, 0.3, 0.4 and 0.5 by weight of emulsified asphalt. The results indicated that the increasing of the A/C ratio improved the bonding interface and the flexible of the CEAM. The increasing of the A/C ratio improved the low temperature resistance and fatigue life of the CEAMSFP. It was also shown that the A/C ratio of 0.3 was found to be the optimum ratio that achieved a balance in performance and the value of the pavement. In this condition, the adhesion level between LGAM and cement grout reached 5，the elastic modules of mortar decreased by 62.5% and the fatigue life of SFP increased by 43.6%.

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The louver affects natural ventilation rate and indoor air distribution. In this paper, the wind velocity profile and pressure distribution in the natural ventilation model building were simulated through CFD. And how different rotation angles of the shutter and different incidence angles of the wind affect natural ventilation rate were studied. Then, the influences of shutters on the discharge coefficients were analyzed, and use principles of the louver equipped in the building were proposed.

In the rapid urbanization of rural western China, a variety of long-standing housing typologies are being replaced with energy consuming brick-concrete structures that have little connection to vernacular traditions. To improve this situation, this paper proposes an ecologically sensitive alternative, based on a case study of the design and construction of 44 new dwellings in Daping Village, Sichuan Province, after that area was devastated by the May 12, 2008 earthquake. We propose that this eco-approach may represent a generalizable approach for sustainable development of vernacular architecture in western China.

Haikou is located in tropic climates in China. The outdoor environment in summer is too harsh to stay here. However, the traditional architecture, namely arcade, still survives in the severe climate. Its indoor and outdoor parameters of arcade are tested in field to research its thermal environments. The heat stress index is used to study the adaptability mechanism of arcade and local human to hot and humid environment. It proves that the metabolic rate and wind velocity are main and adjustable factors to reduce heat stress in such wretched weather. On the condition of metabolic rate below 60met and wind speed above 0.7m/s, the healthy adult can work normally in the arcade or on the corridor. So the human in tropic area should keep their metabolic rate and period staying out in the summer daytime as less as possible, and the architects should make full use of the local wind speed to organize natural ventilation.