کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6480073 | 1428752 | 2017 | 15 صفحه PDF | دانلود رایگان |
- Prepared ultra-fine blast furnace slag based geopolymer for use as concrete repairing agent.
- Workability, compressive and bond strength tests are conducted.
- 1Â day strength of geopolymer concrete is about 60% of 28Â days strength.
- Addition of flyash and superplasticizer at low dosage level shows satisfactory results.
- Bond of geopolymer concrete with rebar and old concrete shows promising results.
In modern era, there is a need to develop sustainable concrete repairing material. This study aimed to develop ultra-fine blast furnace slag based geopolymer as concrete repairing agent. Sodium hydroxide activated geopolymer concrete mixes with various admixtures were prepared and tested to study fresh and hardened state properties including bond strength. The 1Â day strength of ultra-fine blast furnace slag based geopolymer concrete was found to be about 60% of that at 28Â days. Addition of flyash up to certain quantity level contributed towards achieving satisfactory workability, compressive and bond strength of the geopolymer concrete. Similar improvement in fresh and hardened state properties was also observed due to addition of superplasticizer at low dosage level. High alkali activator concentration led to loss of workability and strength of the geopolymer concrete.
Journal: Construction and Building Materials - Volume 154, 15 November 2017, Pages 176-190