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SUMMARY:Evaluating the use of hydrogel as accelerator for no-cement refrac
 tory shotcreting – a higher performance alternative - Izak Cameron
DTSTART;TZID=Europe/Berlin:20240919T090000
DTEND;TZID=Europe/Berlin:20240919T092000
DTSTAMP:20260816T193205Z
UID:pretalx-icr2024-XCEQXY@pretalx.com
DESCRIPTION:The use of microsilica-gel bonding in no-cement (NCC) shotcret
 ing has gained interest in the last decade with the aim of increasing the 
 lifetime of the refractory material. Consequently\, the accelerators that 
 are conventionally used for low-cement and ultra-low cement shotcreting ar
 e not suitable. Alternatives that are currently being used for NCC shotcre
 ting either have cost implications for installation or maintenance of equi
 pment or performance limitations of the refractory product. This study inv
 estigates the use of different hydrogels as accelerators in NCC shotcretin
 g\, together with a binder system\, SioxX®-Flow\, with the aim of improvi
 ng the shotcrete applying process\, high temperature refractory properties
 \, and limitations associated with current alkali-free accelerators. The e
 valuation consisted of two parts: 1) characterization of the hydrogels thr
 ough rheology measurements\, 2) evaluation of hydrogels in refractory shot
 crete. The characterization of the hydrogel consisted of rheology evaluati
 on of refractory slurry suspension that contained the hydrogel and oscilla
 tory rheology for the pure hydrogels to determine gel strength.  The evalu
 ation of the hydrogel in the refractory shotcrete included non-destructive
  resonance frequency and damping analysis of samples after demoulding\, dr
 ying\, and firing at 1500°C. A preferred hydrogel was proposed based on t
 he requirements for application of refractory shotcrete and results from t
 his evaluation.
LOCATION:K3
URL:https://pretalx.com/icr2024/talk/XCEQXY/
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