Concrete has traditionally been regarded as a durable material requiring little or no maintenance. However, over the past several decades, a number of durability related problems have emerged and stimulated research i...Concrete has traditionally been regarded as a durable material requiring little or no maintenance. However, over the past several decades, a number of durability related problems have emerged and stimulated research into the factors relating to concrete durability globally. The challenge now facing practicing engineers is how to design and build structures that not only satisfy the specified structural requirements, but also achieve the performance levels required from a durability standpoint. Research works on concrete structural durability have been widely reported in the literature over the last several decades. In this paper, reviews of four stages of research work on durability, i e, environments, materials, components, and structures, were presented. Afterwards, the key scientific issues in this field were also pointed out.展开更多
Within the context of global climate change, achieving sustainable development in Northeast Asia will require in-depth research into the key scientific issues from both theoretical and empirical perspectives. This pap...Within the context of global climate change, achieving sustainable development in Northeast Asia will require in-depth research into the key scientific issues from both theoretical and empirical perspectives. This paper assesses that the main issues to be addressed are：（i） researches on the structure, function and differentiation disciplines of the vast and complex regional resources-environment-socio-economic system that is Northeast Asia and on how the region can respond and evolve. （ii） Failing to find a mode for sustainable development is one of the most serious restrictive factors to development in Northeast Asia. （iii） Development of cross-border regional socio-economic models for sustainable development is essential. And （iv） the strategies above require cross-border technical support platforms to guarantee a consistent approach to regional sustainability in Northeast Asia.展开更多
基金Funded by the National Natural Science Foundation of China (No.50538070)
文摘Concrete has traditionally been regarded as a durable material requiring little or no maintenance. However, over the past several decades, a number of durability related problems have emerged and stimulated research into the factors relating to concrete durability globally. The challenge now facing practicing engineers is how to design and build structures that not only satisfy the specified structural requirements, but also achieve the performance levels required from a durability standpoint. Research works on concrete structural durability have been widely reported in the literature over the last several decades. In this paper, reviews of four stages of research work on durability, i e, environments, materials, components, and structures, were presented. Afterwards, the key scientific issues in this field were also pointed out.
基金the Principal of State Basic Science Key Project"Comprehensive Scientific Survey in Northern China and Its AdjacentAreas"(Award No.2007FY110300)the National Natural Science Foundation Item"Carbon Emissions Effects and Its ImpactMechanism for the Development of Resource-based City"(Award No.41101117)
文摘Within the context of global climate change, achieving sustainable development in Northeast Asia will require in-depth research into the key scientific issues from both theoretical and empirical perspectives. This paper assesses that the main issues to be addressed are：（i） researches on the structure, function and differentiation disciplines of the vast and complex regional resources-environment-socio-economic system that is Northeast Asia and on how the region can respond and evolve. （ii） Failing to find a mode for sustainable development is one of the most serious restrictive factors to development in Northeast Asia. （iii） Development of cross-border regional socio-economic models for sustainable development is essential. And （iv） the strategies above require cross-border technical support platforms to guarantee a consistent approach to regional sustainability in Northeast Asia.
