Abstract
Geopolymer is identified as a type of promising alternative binder to Portland cement due to its sustainability and excellent properties. This paper investigated the influence of two types of curing regimes (i.e. oven and microwave radiation curing) on the compressive strengths of geopolymer samples, facilitated by scanning electron microscope analysis, which was adopted in the interpretation of strength results. Besides, a comparative life cycle assessment based on Europe was conducted between geopolymer and Portland cement samples with details. Results indicate that it took less time to prepare precast geopolymer concrete with desired strengths using microwave radiation than oven curing. Meanwhile, the source of PFA would greatly influence the strength development of geopolymer samples. Finally, the preparations of geopolymer samples presents lower environmental burdens and CO2 emissions than Portland cement samples, however, the quality and availability of PFA and GGBS in UK led to a re-evaluation of the environmental impacts and strengths of the precast geopolymer concrete in the near future.
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