Releasing Behavior of Chloride Ions in Marine Sands under Cement Environment

Abstract:

In this paper, the releasing behavior for chloride ions in concrete with marine sands is studied. The experimental results show that chloride ion is released completely as soon as marinating in water. And the total releasing of chloride ion has little grown over time. The releasing of chloride ion would not be changed with the increasing quality of marine sand. Whereas, the releasing behavior is different for the different quantity of marine sand in saturated Ca(OH)2 solution which the content of chloride ion decrease with the increasing of marine sand. SEM/EDS observations show that distribution of chloride concentration in the mortar with marine sand is inhomogeneous and the chloride ions reveal a permeable process from surface of marine sand to the internal of cement gel. But for the experimental results of the mortar with internal doped chloride ions from NaCl solution, there is no permeable process in chloride ion of mortar and its distribution is irregular in the products of cement hydration.

• Periodical: Advanced Materials Research (Volumes 602-604)
• Pages: 1021-1027
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.602-604.1021
• Online since: December 2012
• Authors: Jian Chao Zhang, Chi Chen, Yang Yang Ye, Feng Xing, Bi Qin Dong
• Keywords: Cement, Chloride Ion, Internal Doping, Marine Sands, Releasing Behavior

References

[1] Gu Xiaodong, Tian Meiling, The exploration and application of marine sands source in offshore area[J], China Water Transport, 2011,11(8)

[2] CHEN Jian, HU Yi. DEVELOPMENT AND COUNTERMEASURES FOR MARINE SAND RESOURCES IN CHINA[J]. Marine Geology Letters, 2005, 21(7) B: 4-8

[3] Li Xuewen, The production and application of desalted marine sand used for construction [J],Study and Exploration.2009,1

[4] Pan Zhouzhong, Quicken full Utilization of Marine Sand[J], FuJian Construction Technology, 2010,2

[5] Yi Feilon, OuYang Dong, Wen Xilian, Huang Huaxian, Study the comparison of marine sand, river sand, milltailing sand[J], Raw material and supplemental material, 2011,12

[6] Zhang Lu, Shi Yanghang, The influence and Protection Measure of marine sand upon the Concrete Structure Durability[J], Optimization of Capital Construction,2006,27(3)

[7] Zhang Yong, The study of utilization of marine sand and the problem caused by marine sand, SiChuan construction,2006,3

[8] ZhangYong, Fu Jun, The problem of marine sand house and revelation in TaiWan province [J],Optimization of capital construction, 2004,25(6)

[9] J. Bensted, P. Barnes, Liao xin translate, Structure and performance of cement, BeiJing industry Public