Effect of Basalt Fiber Content on Mechanical Properties of Lunar Regolith Simulant Geopolymer Under Static Loading
Jianghuai Zhan, Haolan Yi, Neng Wang, Fei Wang, Shuai Li, Jianmin Hua, Xuanyi Xue
TL;DR
This study explores how adding basalt fibers affects the strength of a concrete-like material made from simulated lunar soil under different curing conditions.
Contribution
The novel contribution is identifying optimal basalt fiber content and curing strategies to enhance the mechanical properties of lunar regolith simulant geopolymer.
Findings
Strong alkali-activated specimens with 0.3% fibers showed optimal ductility with compressive and flexural strengths of 2.85 MPa and 0.53 MPa.
Specimens with 0.2% fibers cured at 80 °C for 1 d achieved maximum compressive and flexural strengths of 44.76 MPa and 1.60 MPa.
Weak alkali-activated specimens with 0.1% fibers at 80 °C for 7 d showed peak flexural strength of 3.88 MPa with good fiber-matrix synergy.
Abstract
In-situ lunar construction technology is critical for future lunar base development, and the production of geopolymers from lunar regolith—a novel cementitious material with concrete-like properties—has become a vital approach for achieving in-situ resource utilization. This study systematically investigated the influence of basalt fiber content (0–0.4%) on the mechanical properties of lunar regolith simulant geopolymers by controlling key parameters including curing temperature (20 °C and 80 °C), duration (1 d and 7 d), and alkali activator type (strong alkaline solution: a mixture of sodium hydroxide and sodium silicate, and weak alkaline solution: sodium silicate solution). Through testing of 144 specimens, the results revealed that strong alkali-activated specimens with 0.3% fibers cured at 20 °C for 7 d showed optimal ductility with compressive strength of 2.85 MPa and flexural…
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Taxonomy
TopicsPlanetary Science and Exploration · Innovations in Concrete and Construction Materials · Innovative concrete reinforcement materials