HIT-L-1 | Lunar Simulant Atlas

Coupling thermodynamic modelling with experimental study to reveal the evolutionary relationship of pore solutions, products, and compressive strength for lunar regolith simulant geopolymers

G. Xue, G. Qiao | 2025 | Composites Part B: Engineering

DOI 10.1016/j.compositesb.2024.111949

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Methods

Leachate chemistryChemical extraction | Biology and plant growth Coupling thermodynamic modelling with experimental studyThermodynamic and experimental analysis | Lunar regolith simulant geopolymerization reaction Geopolymerisation reaction analysisChemical reaction analysis Mechanical property analysisMechanical performance evaluation Compressive strength evaluationMechanical performance evaluation Product formation analysisPhase assemblage analysis Pore solution analysisChemical composition analysis Composition-performance correlation analysisMaterial property correlation Data availabilityData accessibility Preparation technique analysisMaterial preparation analysis Mechanical property optimizationMechanical performance evaluation Environmental impact analysisEnvironmental performance evaluation Geopolymer preparation technique optimizationMaterial preparation analysis Thermodynamic modellingThermodynamic analysis XRD analysismineral composition Raman spectroscopychemical bonds compressive strength and slurry fluidity testperformance evaluation thermodynamic calculationsnumerical simulation isothermal calorimetrykinetic analysis ICP-OESelemental analysis Isothermal calorimetryreaction kinetics thermogravimetric analysis (TGA)thermal analysis pore solution analysissolution characterization X-ray diffractionMineralogical characterization | Benchmarking and comparison Thermogravimetric / differential thermal analysisThermal characterization | Thermal processing Compressive strength testingMechanical testing | Construction and infrastructure Geopolymerization / alkali activationBinder chemistry | Construction and infrastructure

Properties

Journal Identifier1359836880%Chemical compositionDescribes the elemental composition of the sample.95%Nutrient availabilitymeasured from leachate, extractable nutrients, pH, or soluble salts70%Compressive strengthKey factor influenced by [Si] and [Al] in pore solution and gel production100%Product type and contentAffected by alkali activator modulus and dosage100%Pore solution compositionInfluenced by alkali activator modulus and dosage100%Material design and optimizationGuided by composition-performance relationships100%Environmental impactDegradation under extreme environments100%Preparation techniqueCold-sintering process for geopolymer preparation100%Mechanical property optimizationInfluenced by sodium hydroxide and sodium silicate100%Data availabilityData will be made available on request100%Material property correlationInfluenced by preparation techniques, mixture, moulding, and service environment100%Thermodynamic modellingUsed to analyze pore solutions, products, and compressive strength100%MgO content4.03%100%CaO content6.10%100%Primary mineral compositionlabradorite, anorthite, pyroxene, olivine, quartz100%amorphous-phase content32.2 %95%ion activitylower than expected at specified concentration90%saturation indexindicates degree of over- or undersaturation90%reaction kineticsaffected by modulus and dosage of alkali activator90%pore solution compositionSi, Al, Ca, Mg, and Na concentrations90%thermal stabilitytemperature range 30 1000 C90%Glass transition temperatureidentified from glass transition evidence70%amorphous phase composition15.28 g SiO2 /100 g, 7.36 g Al2 O3 /100 g, 6.14 g CaO /100 g, 1.51 g MgO /100 g100%cumulative heat release4.75 to 16.08 J/g100%peak heat release rate0.365 to 0.803 mW/g100%time to peak heat release rate30.3 h to 10.1 h100%heat release proportion55.11 78.38 % of total heat released100%Bound water content3.07 to 3.72g100%Thermal analysis sensitivitysensitive to drying treatment100%Crystallinity of stratlingitelow in content and poor crystallinity100%Secondary product impactminimal impact on mechanical properties100%Elemental concentration trendsConsistent with experimental results95%Bound water contentDecreases with increasing modulus95%Reaction rateHigher with lower modulus95%Thermodynamic model accuracyValidated by experimental results95%Pore solution compositionPrimarily Si, Na, and OH95%Elemental concentration changesMost pronounced within first few hours95%Mineralogycharacterized by XRD70%Thermal behavioranalyzed by TGA/DTA70%Mechanical strengthtested for geopolymer or alkali-activated regolith products70%

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