Optimum Mix for Pervious Geopolymer Concrete (GEOCRETE) Based on Water Permeability and Compressive Strength
| Autor: | Salaheddin Arafa, Yee Loon Lee, Ahmad Zurisman Mohd Ali, Siti Nazahiyah Rahmat |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Pervious concrete 0211 other engineering and technologies Sodium silicate 02 engineering and technology law.invention Geopolymer chemistry.chemical_compound Portland cement 020303 mechanical engineering & transports Compressive strength 0203 mechanical engineering chemistry lcsh:TA1-2040 Sodium hydroxide law Fly ash 021105 building & construction Composite material lcsh:Engineering (General). Civil engineering (General) Curing (chemistry) |
| Zdroj: | MATEC Web of Conferences, Vol 103, p 01024 (2017) |
| ISSN: | 2261-236X |
| DOI: | 10.1051/matecconf/201710301024 |
| Popis: | The production of ordinary Portland cement (OPC) consumes considerable natural resources and energy, and it also affects the emission of a significant quantity of CO 2 in the atmosphere. This pervious geopolymer concrete study aims to explore an alternative binder without OPC. Pervious geopolymer concretes were prepared from fly ash (FA), sodium silicate (NaSiO 3 ), sodium hydroxide (NaOH) solution, and coarse aggregate (CA). The effects of pervious geopolymer concrete parameters that affect water permeability and compressive strength are evaluated. The FA to CA ratios of 1:6, 1:7,1:8, and 1:9 by weight, CA sizes of 5–10, 10–14, and 14–20 mm, constant NaSiO 3 /NaOH ratio of 2.5, alkaline liquid to fly ash (AL/FA) ratios of 0.4, 0.5, and 0.6, and NaOH concentrations of 8, 10, and 12 M were the pervious geopolymer concrete mix proportions. The curing temperature of 80 °C for 24 h was used. The results showed that a pervious geopolymer concrete with CA of 10 mm achieved water permeability of 2.3 cm/s and compressive strength of 20 MPa with AL/FA ratio of 0.5, NaOH concentration of 10 M, and FA:CA of 1:7. GEOCRETE is indicated to have better engineering properties than does pervious concrete that is made of ordinary Portland cement. |
| Databáze: | OpenAIRE |
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