改性水玻璃固化模拟月壤抗压性能试验与分析
首发时间:2024-04-30
摘要:为探究改性水玻璃模数、质量分数、固化温度、固化时间及养护龄期等因素影响下模拟月壤抗压强度的变化规律,基于正交试验分析了上述因素对固化模拟月壤抗压强度的敏感度,并通过X射线衍射(X-ray diffraction,XRD)和扫描电子显微镜(scanning electron microscope,SEM)扫描试验探讨了改性水玻璃对模拟月壤的固化机理。正交试验结果表明:合适的影响因素水平能提高模拟月壤的抗压强度,养护龄期为28 d、激发剂模数为1.8、质量分数为50%、固化温度为65 ℃、固化时间为9 h时抗压强度达到极值。微观试验结果表明:在激发剂模数为1.8、质量分数为50%条件下,改性水玻璃能促进试样产生更多水化硅铝酸钙凝胶,充填试样内部孔隙,结构更加紧密,故模拟月壤抗压强度得到提高。
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Test and analysis of compressive performance of modified water glass solidification simulated lunar soil
Abstract:In order to investigate the changing law of the compressive strength of modified water glass simulated lunar soil under the influences of modulus, concentration, curing temperature, curing time and curing age, the sensitivity of the above factors to the compressive strength of the cured simulated lunar soil based on the orthogonal test was analyzed, and the curing mechanism of modified water glass on the simulated lunar soil was discussed through X-ray diffraction (XRD) and scanning electron microscope (SEM) scanning test. The curing mechanism of modified water glass on simulated moon soil was investigated. The test results show that the compressive strength of the simulated lunar soil can be improved by the appropriate level of influencing factors, i.e., the compressive strength reaches the extreme value when the age of curing is 28 d, the modulus of the exciter is 1.8, the concentration is 50%, the curing temperature is 65 ℃, and the curing time is 9 h. The results of the microcosmic tests show that the compressive strength of the simulated lunar soil can be improved by the appropriate level of influencing factors. The microscopic tests show that under the conditions of exciter modulus of 1.8 and concentration of 50%, the modified water glass can promote the generation of more hydrated calcium silica-aluminate gels, which fill the internal pores of the specimens and make the structure more compact, and the compressive strength of the simulated lunar loam is improved thereof.
Keywords: simulated lunar soil alkali initiators orthogonal test mechanical properties curing mechanism
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