Analysis of cement pastes and mortars by a combination of backscatter-based SEM image analysis and calculations based on the Powers model

By S. Igarashi, M. Kawamura, Akio Watanabe. 2004

138 citations recorded by the source corpus.

Formation of microstructure in cement pastes and mortars were quantitatively analyzed by the SEM-BSE image analysis. Effects of water/cement ratio and of the addition of mineral admixtures on the contents of unhydrated cement particles and pores were discussed. The proportions of each phase obtained by the analyses were compared with proportions calculated on the Powers model. It was found from comparisons that the volume fractions of the residual cement and pores obtained by the image analysis did not contradict those estimated from the Powers model. Lower water/cement ratio pastes and those undergoing pozzolanic reaction showed less fine capillary pores. It was also found that large capillary pores still remained in the mixtures at long ages. The gel/space ratio in the Powers and Brownyard equation was calculated from the phase constituents determined by the image analysis. For mortars without mineral admixture, the gel/space ratio by the image analysis could be related to the strength.

Subfields: Civil and Structural Engineering, Earth-Surface Processes

View Paper: https://www.semanticscholar.org/paper/6580aaf079765dc4ebf5a1242ce6b8de1519ab18

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Civil and Structural Engineering

1. Chuanlin Hu
2. Zongjin Li
3. S. Igarashi
4. Akio Watanabe
5. M. Kawamura
6. J. Sanjayan
7. R. Zhao
8. Hongyan Ma

In Earth-Surface Processes

1. Chuanlin Hu
2. Zongjin Li
3. Akio Watanabe
4. M. Kawamura
5. S. Igarashi

Citations in the corpus

• Micromechanical investigation of Portland cement paste (2014, background): “, the segmentations of residual cement clinker (denoted as CM) [19,37], Portlandite (denoted as CH) [2,38], and pores (denoted as P) [2,19,37,46].”
• Evaluation of capillary pore size characteristics in high-strength concrete at early ages (2005, methodology): “In this study, the Powers model [9] was applied to the results of image analysis [10].”
• Property investigation of individual phases in cementitious composites containing silica fume and fly ash (2015, background): “, the segmentation of residual cement grains [18,19], calcium hydroxide [18,20], and pores [20–24].”