Influence of stone dust in manufactured sand on resisting chloride penetration in marine concrete

Author(s): Pengping Li, Jianbo Xiong, Rui Chai, Yingfei Wang
Paper category: Conference
Book title: 2nd International conference on Microstructural-related Durability of Cementitious Composites
Editor(s): Guang Ye, K. Van Breugel, Wei Sun, Changwen Miao
Print ISBN: 978-2-35158-129-2
e-ISBN: 978-2-35158-123-0
Publisher: RILEM Publications SARL
Pages: 1248 - 1256
Total Pages: 8
Language: English

Abstract: 
In China, manufactured sand has been widely used as fine aggregate in concrete. Therefore, it is necessary to investigate the effect of manufactured sand on durability of concrete. This research studies the influence of stone dust content in manufactured sand on resisting chloride penetration in marine concrete by strength and other physical mechanical tests, XRD, TGA and pore structure analysis. Test results have shown that the chloride diffusion coefficient increased with increasing the stone dust content in manufactured sand when the stone dust content increasing from 3% to 13%. The stone dust in fine aggregate participated in the hydration of cement, which will promote the hydration degree of the cementitious material and increase the chloride binding capacity of hydration product. The influence of stone dust in fine aggregate on the chloride diffusion coefficient were the combined effects of concrete pore structure and hydration products. The porosity and pore size distribution were the main factors that influence the diffusion coefficient.

Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00