文章信息/Info

Title:

Research and Progress on Durability of Concrete under Combined Mechanical Load and Environment Actions

作者:

姚燕; 王玲; 王振地; 曹銀; 唐官保; 杜鵬; 黃鵬飛

（中國建筑材料科學研究總院有限公司 綠色建筑材料國家重點實驗室，北京 100024）

Author(s):

YAO Yan;  WANG Ling;  WANG Zhendi;  CAO Yin;  TANG Guanbao;  DU Peng;  HUANG Pengfei

(State Key Laboratory of Green Building Materials, China Building Materials Academy, Beijing 100024, China)

關鍵詞:

混凝土; 耐久性; 荷載; 服役環境; 評價技術; 壽命預測

Keywords:

concrete;  durability;  mechanical load;  environment action;  evaluation technique;  service life prediction

DOI:

10.7502/j.issn.1674-3962.2018.11.03

文獻標志碼:

A

摘要:

混凝土是基礎設施建設不可或缺的工程材料，其耐久性是服役環境下混凝土結構壽命的重要保障。荷載作用引起混凝土材料微結構變化，荷載較大時，混凝土內的孔隙連通和微裂紋擴展影響到介質的滲透和傳輸。荷載和服役環境的疊加作用加速混凝土性能劣化，因此耦合作用下混凝土耐久性研究成為了國際關注的熱點。綜述了荷載與服役環境耦合作用下混凝土耐久性研究的探索和研究進展，總結了國內外在荷載-凍融循環、荷載-氯鹽、荷載-碳化耦合作用下混凝土耐久性評價方法和表征參數等方面取得的重要突破，并介紹了荷載-凍融循環、荷載-氯鹽耦合作用下混凝土壽命預測模型與方法的最新研究成果。最后，指出了現有荷載與典型服役環境作用下混凝土耐久性研究的局限性和后續的研究方向。

Abstract:

Concrete is an indispensable engineering material for infrastructure construction, and its durability is of great importance for the service life of concrete structures in service environments. External load causes the change of microstructure and pore structure of concrete, which affects the penetration and transportation of medium into the concrete matrix. When the load is large, micro cracks appear inside the concrete matrix and the connectivity increases gradually. The combined mechanical and environmental action leads to accelerated degradation of concrete performance. Therefore, durability of concrete under combined mechanical load and environmental actions has become a hot topic at home and abroad in recent years. The present paper reviews the exploration and research progress of concrete durability research under the combined mechanical load and environmental actions. The paper summarizes the important breakthroughs in the characterization parameters and evaluation of concrete durability under combined load and freeze�瞭haw cycles, load and chloride salt, load and carbonation, respectively. The latest research progress of the service life prediction models and methods for concrete under the combination of load and freeze�瞭haw cycles, load and chloride salts is introduced. In addition, the limitations of the existing research related to durability of concrete under combined mechanical load and environmental actions as well as the corresponding research prospective are outlined.