1前言 20世纪这100年里,我们经历了民主、社会、技术和环境空前的变化,这些变化对所有的工业,包括建筑业都带来巨大的影响。至今,砼建筑业一直是以及时和有效的方式满足住房和基础设施的需求。现在我们进人了新世纪,面临着新的挑战,如何建设在环境方面可以持续发展的砼结构。高浓度温室气体造成的气候变化已成为环境最大的威胁。以往,通常认为结构物的耐久性不足,既非设计,也 1 Introduction In these 100 years of the 20th century, we have experienced unprecedented changes in democracy, society, technology and the environment. All these have had a dramatic impact on all industries, including the construction industry. To date, the concrete construction industry has always met the needs of housing and infrastructure in a timely and efficient manner. Now that we have entered the new century, we are faced with new challenges and how to build concrete structures that can sustainably develop in the environment. Climate change caused by high concentrations of greenhouse gases has become the biggest threat to the environment. In the past, durability of a structure was generally considered to be insufficient, neither of which was designed