A novel water permeable geopolymer with high strength and high permeability coefficient derived from fly ash, slag and metakaolin

作者：Duan, Ping^*; Yan, Chunjie; Zhou, Wei

来源：Advanced Powder Technology, 2017, 28(5): 1430-1434.

DOI：10.1016/j.apt.2017.03.009

• Geopolymer
• Water permeable
• Metakaolin
• Permeability coefficient

In this work, a new water permeable geopolymer with high strength and high water permeability coefficient based on fly ash-slag-metakaolin was proposed. The experimental results show that fresh geopolymer composite exhibits dry characteristic and porous structure. The void ratio is 27.6% and the permeability coefficient reaches 1.70 cm/s. The compressive strength and flexural strength reach about 30 MPa and 6.2 MPa, respectively at 1 day and reach as high as 49 MPa and 11.3 MPa at 28 days of curing, respectively. After 100 freeze-thaw cycles, the terminal remaining mass is still larger than 80% along with internal damages and deteriorations on geopolymer paste coating. The dense microstructure of geopolymer matrix and interfacial transition zone indicates the high compressive strength, flexural strength and high freeze-thaw resistance of water permeable geopolymer.

• 出版日期2017-5
• 单位中国地质大学（北京）