Influence of liquid-binder ratio on the performance of alkali-activated slag mortar with superabsorbent polymer

Yang, Zhengxian; Shi, Peng; Zhang, Yong; Li, Zhenming

doi:10.1016/j.jobe.2021.103934

Cited by 6 publications

(2 citation statements)

References 40 publications

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“…In this study, CCD method was used to investigate the effect of L/S and Ms on the performance of MSGP. According to the relevant studies and a trail test, the primary variation ranges of L/S and Ms were determined 31 , 34 , 51 – 54 . L/S ratios were set at 0.7, 0.8, 0.9 and 1.0, and Ms values were set at 1.2, 1.5 and 1.8.…”

Section: Materials and Experimentationmentioning

confidence: 99%

Research on mix design and mechanical performances of MK-GGBFS based geopolymer pastes using central composite design method

Yao,

Luo,

Qin

et al. 2024

Sci Rep

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In order to alleviate environmental problems and reduce CO2 emissions, geopolymers had drew attention as a kind of alkali-activated materials. Geopolymers are easier access to raw materials, green and environment friendly than traditional cement industry. Its special reaction mechanism and gel structure show excellent characteristics such as quick hardening, high strength, acid and alkali resistance. In this paper, geopolymer pastes were made with metakaolin (MK) and ground granulated blast furnace slag (GGBFS) as precursors. The effects of liquid–solid ratio (L/S) and modulus of sodium silicate (Ms) on the performances of MK-GGBFS based geopolymer paste (MSGP) were characterized by workability, strength and microstructural tests. The regression equations were obtained by central composite design method to optimize the mix design of MSGP. The goodness of fit of all the equations were more than 98%. Based on the results of experiments, the optimum mix design was found to have L/S of 0.75 and Ms of 1.55. The workability of MSGP was significantly improved while maintaining the strength under the optimum mix design. The initial setting time of MSGP decreased by 71.8%, while both of the fluidity and 28-d compressive strength increased by 15.3%, compared with ordinary Portland cement pastes. Therefore, geopolymers are promising alternative cementitious material, which can consume a large amount of MK and GGBFS and promote green and clean production.

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Section: Materials and Experimentationmentioning

confidence: 99%

Research on mix design and mechanical performances of MK-GGBFS based geopolymer pastes using central composite design method

Yao,

Luo,

Qin

et al. 2024

Sci Rep

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show abstract

“…Since the first paper about hydrogels reported by Wichterle and Lim 1 , hydrogels have been widely used in chemical engineering 2 – 4 , agricultural 5 – 7 , pharmaceutical 8 , 9 , architecture 10 , 11 , and hygienic applications 12 , 13 , etc. For the applications in hygienic products, one of the very important properties is fast swelling of dry hydrogels in aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

Preparation of fast-swelling porous superabsorbent hydrogels with high saline water absorbency under pressure by foaming and post surface crosslinking

Zhai,

Wang

2023

Sci Rep

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Superabsorbent hydrogels have wide applications in many fields because of their unique water absorbing performance. In spite of decades of research about superabsorbent hydrogels, high water absorbency under pressure and fast-swelling are still challenging and highly desired for their applications in hygienic products and others. Here, we report preparation of fast-swelling porous starch-g-poly(acrylic acid)/poly(vinyl alcohol) superabsorbent hydrogels with high saline water absorbency under pressure by foaming and post surface crosslinking. 2,2′-Azobis(2-amidinopropane) dihydrochloride (AIBA) was used as a new porogen instead of conventional porogens like NaHCO3. Post surface crosslinking of the hydrogel was achieved using glycerol via the esterification reaction. AIBA is a better porogen than NaHCO3 regarding porosity and swelling performance of the hydrogels, and its content has great influences on structure and swelling performance of the hydrogels including water absorbency and swelling rate. Also, the surface crosslinking using glycerol can significantly enhance the saline water absorbency under pressure (2 kPa) but at the sacrifice of the swelling rate. Consequently, the hydrogels show high water absorbencies for deionized water (560 g/g), 0.9 wt% NaCl solution (58 g/g), 0.9 wt% NaCl solution under 2 kPa pressure (28 g/g) and fast-swelling (31 s to achieve a highly swelling state).

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Effect of Superabsorbent Polymer Hydrogels in the Advancement of Cementitious Materials– A Review

Ramesh

Xavier

2023

J Polym Environ

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Influence of liquid-binder ratio on the performance of alkali-activated slag mortar with superabsorbent polymer

Cited by 6 publications

References 40 publications

Research on mix design and mechanical performances of MK-GGBFS based geopolymer pastes using central composite design method

Research on mix design and mechanical performances of MK-GGBFS based geopolymer pastes using central composite design method

Preparation of fast-swelling porous superabsorbent hydrogels with high saline water absorbency under pressure by foaming and post surface crosslinking

Effect of Superabsorbent Polymer Hydrogels in the Advancement of Cementitious Materials– A Review

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