Pore structure characteristic of roller compacted concrete with special mineral admixture

Title: Pore structure characteristic of roller compacted concrete with special mineral admixture
Author(s): C. Lu, H. Wang, G. Mei
Paper category : conference
Book title: International Conference on Microstructure Related Durability of Cementitious Composites
Editor(s): W. Sun, K. van Breugel, C. Miao, G. Ye and H. Chen
Print-ISBN: 978-2-35158-065-3
e-ISBN: 978-2-35158-084-4
Publisher: RILEM Publications
Publication year: 2008
Pages: 225 - 231
Total Pages: 7
Nb references: 2
Language: English

Abstract: There is more than 50% content of mineral admixture in roller compacted concrete (RCC), and it has serious influence on RCC’s performance. The hydration and pore structure properties of RCC with combined mineral admixtures of ground limestone powder and ground granulated blast-furnace slag (SL mineral admixture) were studied with the methods of SEM and MIP. The experiment results of microstructure were compared with that of RCC incorporated with fly ash. The results show that the hydration products of SL mineral admixture-cement paste are C-S-H gel, Ca(OH)2, and AFt and some cement grains remains unhydrated. There are 35.06% of porosity and 0.095 µm of average pore size at 28 days that of 23.29% and 0.025 µm at 120 days of SL mineral admixture-cement paste. After long-age curing, pore structure of SL mineral admixture-cement paste is better than that of fly ashcement paste. The application experience of SL RCC in a hydropower station of China revealed that the performances of SL RCC can meet the design requirements and the construction of this hydropower station has good quality.

Online publication: 2009-06-09
Publication type : full_text
Public price (Euros): 0.00