Page 30 - New Trends in Green Construction

Circular Economy
Materials
Cement Metakaolin
Filer
Fine aggregate Coarse aggregate Water
Additive: Pf Additive: Sp
3. Results and conclusions
Table 1: Concrete compositions (kg/m3).
Concrete compositions
CCV400 CCV365 SCC340 SCC320
400 365 340 320
- - 19 32
- - 78 99 770 801 825 846 950 994 761 781 200 190 238 214.4 1.4 1.3 2.0 1.9
- - 3.9 5.0
Figure 1-a shows that it is possible to obtain SCC’s with higher compressive strengths as the amount of cement in the blend is reduced. Besides contributing to the mechanical improvement in use, these results contribute to the environment due to the reduction of cement consumption. Figure 1-b showed it is possible to make SCC with better durability over conventional concrete, decreasing to 20% the cement consumption with the aid of mineral additions, even though, show higher compressive strengths.
Figure 1 – (a) Compressive strength (MPa) and (b) coefficient of diffusion (10-12m2/s).
4. Acknowledgment
To the CNPq process 488337 / 2013-5 for the financial support to the project.
5. References
Anjos, M.A.S. et al. (2014). Betão auto-compactável eco-eficiente de reduzido teor em cimento com incorporação de elevado volume de cinzas volantes e metacaulino. 1o Congresso Luso-Brasileiro de Materiais de Construção Sustentáveis, Guimarães, Portugal.
EFNARC. (2005). The European Guide lines for Self-Compacting Concrete Specification, Production and Use. BIBM, CEMBUREAU, EFCA, EFNARC, ERMCO.
Wongkeo, W., Thongsanitgarn, P., Ngamjarurojana, A., & Chaipanich, A. (2014). Compressive strength and chloride resistance of self-compacting concrete containing high level fly ash and silica fume. Materials & Design, 64, 261-269.
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