Compressive strength of GGBFS based GPC under thermal curing

Evaluation of reactivity indexes and durability properties of slag-based geopolymer concrete incorporating corn cob ash

“…The fc, RIs (LM, AM, and SM), w/b ratio, and b/agg ratio was predicted using the fit regression model at the 95% CI and PI, and the regression equations are illustrated in Eq. 20 12 and 13 illustrate the statistical comparison and trend between the compressive strengths of experimental results and that of predictive models for M 30 and M 40, respectively. It was observed that both experimental and predictive results exhibited similar values and patterns of compressive strength.…”

“…Therefore, the practical and economical ways of improving concrete's suitability and, at the same time utilizing agro-industrial wastes is by the full or partial replacement of PC with SCMs [10]. The partial or fully incorporation of SCMs in the production of green concrete, apart from limiting the environmental impact of PCC, has been reported to improve the workability [15,16], mechanical [17][18][19][20][21], durability [22][23][24][25] and economical [26][27][28] properties of concrete. Moreover, the use of SCMs does not only reduce the initial CO 2 emissions of PC production but also reduce the volume of PCC needed in the construction industry and extend the service life of a building, which is typically based on the criteria of durability [29].…”

Application of the response surface method to optimize alkali activated cements based on low-reactivity ladle furnace slag

“…Additionally, it is also clear from the presented results that the mixtures with slag and fly ash have higher strength than the mixture with only slag (mixtures 1, 6, 12, 13, and 16), indicating that the presence of fly ash is important to increase the silica content needed to the N-A-S-H gel structure. It should be also pointed out that these strength values are lower than what is generally obtained with blast furnace slags [39][40][41], although enough for most geotechnical applications.…”

Influence of various factors on properties of geopolymer paste: A comparative study

“…As a result of modification of experimental parameters, compressive strength development reached to 41.43 MPa was obtained from GP sample, which did not harden in laboratory conditions. It was expressed in some previous studies that thermal curing process is necessary for alkali activation of pure alumina silicate based raw materials 53–57,65,80 . Noushini and Castel (2016) stated that curing in laboratory conditions is not a convenient and practical option for geopolymer samples with low calcium content 81 .…”

“…SH solutions with the specified concentration were prepared one day before and kept in laboratory conditions in order to prevent evaporation of the alkali activators by heat. Preparation and storage of alkali activators one day in advance is recommended by some researchers 64–66 . Volcanic tuff and alkali activators were mixed for 5 min according to normal consistency determined previously.…”