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Sodium silicate

About: Sodium silicate is a research topic. Over the lifetime, 9967 publications have been published within this topic receiving 101210 citations. The topic is also known as: water glass.


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Journal ArticleDOI
TL;DR: In this article, the compressive strength of C fly ash (CFA) and a mixed alkali activator of sodium hydroxide and sodium silicate solution was investigated, where the modulus of the activator viz., molar ratio of SiO 2 /Na 2 O was 1.5, and proper content of this activator as evaluated by the mass proportion of Na 2 O to CFA was 10%.
Abstract: Geopolymers prepared from a class C fly ash (CFA) and a mixed alkali activator of sodium hydroxide and sodium silicate solution were investigated. A high compressive strength was obtained when the modulus of the activator viz., molar ratio of SiO 2 /Na 2 O was 1.5, and the proper content of this activator as evaluated by the mass proportion of Na 2 O to CFA was 10%. The compressive strength of these samples was 63.4 MPa when they were cured at 75 °C for 8 h followed by curing at 23 °C for 28 d. In FTIR spectroscopy, the main peaks at 1036 and 1400 cm −1 have been attributed to asymmetric stretching of Al–O/Si–O bonds, while those at 747 cm −1 are due to the Si–O–Si/Si–O–Al bending band. The main geopolymeric gel and calcium silicate hydrate (C–S–H) gel co-exist and bond some remaining unreacted CFA spheres as observed in XRD and SEM–EXDA. The presence of gismondine (zeolite) was also observed in the XRD pattern.

621 citations

Journal ArticleDOI
TL;DR: In this paper, the authors investigated the durability of geopolymer materials manufactured using class F fly ash and alkaline activators when exposed to a sulfate environment and found that the most significant deterioration was observed in the sodium sulfate solution and it appeared to be connected to migration of alkalies into solution.

607 citations

Journal ArticleDOI
TL;DR: Alkali activation of ground granulated blast furnace slag with sodium silicate gave clinker-free binders, with high strength and early strength development, although set times were short and somewhat variable as mentioned in this paper.

545 citations

Journal ArticleDOI
TL;DR: In this paper, the effect of the water, sodium hydroxide and sodium silicate contents in the synthesis of fly ash-based geopolymers on their compressive strength is investigated.

525 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023315
2022632
2021318
2020401
2019518
2018672