Mechanical and Hydraulic Behaviors of Eco-Friendly Pervious Concrete Incorporating Fly Ash and Blast Furnace Slag
Abstract
:1. Introduction
2. Objective
3. Experimental Program
3.1. Materials
- Cement: P.O 42.5 cement was selected, which was from Hunan Pingtang Cement Plant in Hunan, China. P.O 42.5 means ordinary Portland cement and the 28-day cement mortar strength is 42.5 MPa when the water-cement ratio is 0.45. The chemical components of the cement is shown in Table 1.
- Aggregate: single-sized gravel aggregates with the size in 16–19 mm.
- The FA and BFS used in this study came from Xiangtan Power Plant in Hunan, China. The chemical components of FA and BFS are shown in Table 1.
3.2. Sample Preparation
3.3. Test Methods
3.3.1. Rheology Test
3.3.2. Hydraulic Tests
3.3.3. Mechanical Tests
4. Results and Discussions
4.1. Rheology Test
4.2. Compressive Strength
4.3. Hydraulic Performance
5. Conclusions
- FA increased the apparent viscosity, while BFS was not able to change the rheology performance significantly. Rheology performance of cementitious pastes containing FA and/or BFS belonged to the Bingham model.
- FA and BFS both decreased the compressive strength of pervious concrete at 28 d, while FA and/or BFS could slightly increase the compressive strength at 60 d. Compared to BFS, FA plays a more significant role in the compressive strength.
- The effective porosity and permeability coefficient both decreased with the incorporation of FA and/or BFS in the pervious concrete. As the content of FA or BFS increased, the reduction was larger. However, when the replacement rate was 30%, concretes with ternary blends presented larger porosity than binary blends.
- Permeability coefficient and compressive strength both decreased with the increase of effective porosity.
- The use of FA and BFS is a sustainable approach in pervious concrete that considers both the mechanical properties and hydraulic properties.
Author Contributions
Funding
Conflicts of Interest
References
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Components | Cement (%) | FA (%) | BFS (%) |
---|---|---|---|
SiO | 21.38 | 50.15 | 30.7 |
AlO | 5.63 | 30.51 | 9.8 |
FeO | 3.56 | 2.08 | 2.1 |
CaO | 63.72 | 12.5 | 47.5 |
MgO | 2.15 | 0.088 | 3.8 |
SO | 1.75 | 0.4 | 4.4 |
NaO | 1.02 | 1.32 | 1.07 |
LOI | 0.79 | 1.13 | 0.63 |
Total | 100 | 98.2 | 100 |
No. | Mass Percentage | W-C Ratio | ||
---|---|---|---|---|
C | FA | BFS | ||
M1 | 100 | 0 | 0 | 0.35 |
M2 | 70 | 0 | 30 | 0.35 |
M3 | 70 | 10 | 20 | 0.35 |
M4 | 70 | 15 | 15 | 0.35 |
M5 | 70 | 20 | 10 | 0.35 |
M6 | 70 | 30 | 0 | 0.35 |
Cement (kg) | Compressive Strength (MPa) | Effective Porosity (%) | Permeability Coefficient (Cm/s) |
---|---|---|---|
160 | 3.3 | 35.0 | 25.0 |
210 | 4.5 | 33.3 | 19.1 |
240 | 5.5 | 30.8 | 11.7 |
280 | 8.4 | 28.3 | 6.9 |
320 | 10.6 | 26.3 | 4.5 |
No. | C (kg/m) | FA (kg/m) | BFS (kg/m) |
---|---|---|---|
C | 280 | 0 | 0 |
A1 | 224 | 56 () | 0 |
A2 | 224 | 0 | 56 () |
A3 | 196 | 84 () | 0 |
A4 | 196 | 0 | 84 () |
A5 | 196 | 28 () | 56 () |
A6 | 196 | 56 () | 28 () |
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Peng, H.; Yin, J.; Song, W. Mechanical and Hydraulic Behaviors of Eco-Friendly Pervious Concrete Incorporating Fly Ash and Blast Furnace Slag. Appl. Sci. 2018, 8, 859. https://doi.org/10.3390/app8060859
Peng H, Yin J, Song W. Mechanical and Hydraulic Behaviors of Eco-Friendly Pervious Concrete Incorporating Fly Ash and Blast Furnace Slag. Applied Sciences. 2018; 8(6):859. https://doi.org/10.3390/app8060859
Chicago/Turabian StylePeng, Hua, Jian Yin, and Weimin Song. 2018. "Mechanical and Hydraulic Behaviors of Eco-Friendly Pervious Concrete Incorporating Fly Ash and Blast Furnace Slag" Applied Sciences 8, no. 6: 859. https://doi.org/10.3390/app8060859
APA StylePeng, H., Yin, J., & Song, W. (2018). Mechanical and Hydraulic Behaviors of Eco-Friendly Pervious Concrete Incorporating Fly Ash and Blast Furnace Slag. Applied Sciences, 8(6), 859. https://doi.org/10.3390/app8060859