TY - JOUR
T1 - Characterization, mechanical properties, and microstructural development of lunar regolith simulant-portland cement blended mixtures
AU - Neves, Juliana Moraes
AU - Ramanathan, Sivakumar
AU - Suraneni, Prannoy
AU - Grugel, Richard
AU - Radlińska, Aleksandra
N1 - Funding Information:
The authors gratefully acknowledge the financial support from the National Aeronautics and Space Administration (NASA) – Grant No. NNX17AC48G , as well as use of MSFC’s EM31 Materials Diagnostics laboratory. Appreciation is also expressed to Dr. Jennifer Edmundson for providing the JSC -1A, to Nichole Wonderling, and Kat Crispin (Materials Research Institute – Penn State ) for their invaluable insights.
PY - 2020/10/20
Y1 - 2020/10/20
N2 - Lunar regolith simulant – JSC-1A is a basaltic powder compositionally similar to rock samples brought back from the moon by Apollo missions. This study describes JSC-1A as a potential construction material advancing the critical, prerequisite knowledge for the construction of shelters on the moon. A reactivity test based on isothermal calorimetry and thermogravimetric analysis was conducted on JSC-1A materials of different fineness. The results indicated that the finer portion could potentially be used as a supplementary cementitious material (SCM) of low reactivity, whereas the coarser fraction, which was considered inert, could be used as a filler/aggregate material (similar to sand). Four JSC-1A-portland cement blended pastes were tested as prospective binders. Some extent of portlandite consumption by JSC-1A in blended pastes was confirmed through thermogravimetric analysis. Blended mortar containing 75% JSC-1A and 25% portland cement developed over 30 MPa of compressive strength at 28 days of hydration and an increasing strength development over time was observed, as JSC-1A slowly reacted. Microstructural analysis of these mortars showed evidences of dissolution sites on JSC-1A and formation of different types of reaction products. The results presented and discussed in this research lengthen the directions for long-term space missions.
AB - Lunar regolith simulant – JSC-1A is a basaltic powder compositionally similar to rock samples brought back from the moon by Apollo missions. This study describes JSC-1A as a potential construction material advancing the critical, prerequisite knowledge for the construction of shelters on the moon. A reactivity test based on isothermal calorimetry and thermogravimetric analysis was conducted on JSC-1A materials of different fineness. The results indicated that the finer portion could potentially be used as a supplementary cementitious material (SCM) of low reactivity, whereas the coarser fraction, which was considered inert, could be used as a filler/aggregate material (similar to sand). Four JSC-1A-portland cement blended pastes were tested as prospective binders. Some extent of portlandite consumption by JSC-1A in blended pastes was confirmed through thermogravimetric analysis. Blended mortar containing 75% JSC-1A and 25% portland cement developed over 30 MPa of compressive strength at 28 days of hydration and an increasing strength development over time was observed, as JSC-1A slowly reacted. Microstructural analysis of these mortars showed evidences of dissolution sites on JSC-1A and formation of different types of reaction products. The results presented and discussed in this research lengthen the directions for long-term space missions.
KW - Blended mixtures
KW - JSC-1A
KW - Lunar regolith simulant
KW - Portland cement
KW - Reactivity test
KW - Space construction
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U2 - 10.1016/j.conbuildmat.2020.120315
DO - 10.1016/j.conbuildmat.2020.120315
M3 - Article
AN - SCOPUS:85089939566
VL - 258
JO - Construction and Building Materials
JF - Construction and Building Materials
SN - 0950-0618
M1 - 120315
ER -