珊瑚骨料混凝土改性技术研究进展  

Research Progress on Improved Technology of Coral Aggregate Concrete

作　　者：柴源 牛勇 李文杰 吕海波[2,3] CHAI Yuan;NIU Yong;LI Wenjie;LYU Haibo(College of Civil Engineering and Architecture,Guangxi University,Nanning 530000,China;College of Civil Engineering and Architecture,Guilin University of Technology,Guilin 541000,China;College of Architecture and Electrical Engineering,Hezhou University,Hezhou 542800,China)

机构地区：[1]广西大学土木建筑工程学院,南宁530000 [2]桂林理工大学土木与建筑工程学院,桂林541000 [3]贺州学院建筑与电气工程学院,贺州542800

出　　处：《材料导报》2021年第15期15134-15142,共9页Materials Reports

基　　金：国家自然科学基金(51169005,41272358);广西自然科学基金重点项目(2018JJD160019);广西硕士研究生创新项目(YCSW2019161)。

摘　　要：随着海洋资源的开发和建设,利用珊瑚骨料制备混凝土已在岛礁工程中得到广泛应用。最近的几年内,有关珊瑚骨料混凝土的基本特性、力学性能和耐久性的研究已取得一定的成果,同时制备工艺也在不断优化。但由于珊瑚骨料特殊的生物成因,其通常疏松多孔、表面粗糙、形状不规则、附着多种盐离子,这些特性会影响混凝土的工作性能。因此,研究者们主要针对优化珊瑚骨料混凝土性能进行不断的尝试,发现了多种珊瑚骨料混凝土改性技术。珊瑚混凝土虽然很早就投入生产使用,但是珊瑚集料在混凝土制备过程中表现出一些缺陷:如颗粒强度不如石英砂,导致制备的混凝土强度等级低,不能满足更高的工程要求;渗透性高、孔隙多的特性导致珊瑚混凝土抗渗能力低于普通混凝土,内部钢筋受腐蚀速度快,耐久性不佳,同时也对骨料与钢筋结合能力方面造成了影响。国内外对珊瑚混凝土的改性技术研究也主要围绕这几方面展开。目前已经有多种技术对珊瑚混凝土改性成功。在提升混凝土力学性能方面:掺入纤维制品、矿物成分和外加剂;使用酸溶液或有机溶液处理珊瑚骨料改善骨料特性;优化珊瑚混凝土配合比,可以有效提升珊瑚混凝土的力学强度。在改善混凝土抗渗能力和耐腐蚀性方面:采用特种筋替代碳钢钢筋;加入阻锈剂和采用传统抗Cl-腐蚀措施;使用地质聚合物水泥;对珊瑚骨料进行淡化处理,都是有效的耐腐蚀方法。文中基于国内外已有的珊瑚骨料混凝土研究成果,综述了其改性技术的研究进展,分别对提高珊瑚混凝土的强度、增强钢筋结合能力和提升耐久性方面进行介绍,最后探讨了今后珊瑚骨料混凝土的研究方向,以便为后续研究提供参考。With the development and construction of marine resources,coral aggregate concrete has been widely used on islets and reefs.In recent years,some research results of the basic properties,mechanical properties,and durability of coral aggregate concrete have been obtained.Meanwhile,the preparation technology of coral aggregate concrete has also been continuously optimized.However,because of its unique biological origin,coral sands are usually loose,rough,and irregular in shape,has multiple holes,and are bonded with a variety of salt ions.These characteristics will affect the engineering performance of coral aggregate concrete.Therefore,the researchers mainly tried to optimize the performance of coral aggregate concrete and proposed a variety of improved technologies for coral aggregate concrete.Although coral aggregate concrete has been in production for a long time,its preparation process has some flaws.For example,the strength of the particles of coral sands is not as good as that of quartz sands,which results in low strength of coral aggregate concrete.Thus,coral aggregate concrete cannot meet stringent engineering requirements.Moreover,high permeability and porosity cause the anti-permeability of coral aggregate concrete to be lower than that of ordinary concrete,which leads to the rapid corrosion and poor durability of internal rebar,affecting the binding ability of the aggregate and reinforcement.Research on the improvement of coral aggregate concrete also focuses on these aspects at home and abroad.At present,a series of technologies have successfully improved the properties of coral aggregate concrete.In terms of the mechanical properties of coral aggregate concrete,adding fiber,mineral components,and additives,treating coral aggregate with an acid or organic solution,and optimizing the mixing ratio can effectively enhance the strength of coral aggregate concrete.In terms of improving the anti-permeability and corrosion resistance of coral aggregate concrete,using special reinforcement instead of carbon stee

关 键 词：珊瑚骨料混凝土 力学性能 耐久性能 增强性能 

分 类 号：TU528[建筑科学—建筑技术科学]