CAJ | 학술논문

为确定工业级轻烧氧化镁粉与七水硫酸镁溶液配制改性硫氧镁胶凝材料的最优参数，分别研究了不同氧化镁/七水硫酸镁摩尔比，硫酸镁溶液浓度及水稳剂水玻璃对硫氧镁胶凝材料工作和力学性能的影响.结果表明：随着氧化镁/硫酸镁摩尔比的提高，硫氧镁水泥的初凝时间逐渐缩短，流动性逐渐降低，抗压和抗折强度逐渐提高；随着七水硫酸镁浓度的提高，硫氧镁水泥的抗压抗折强度也呈现增长趋势， MgO：MgSO4·7H2O：H2O摩尔比为14：1：12时，硫氧镁胶凝材浆体的28 d抗压和抗折强度分别达到38.3 MPa和7.0 MPa.耐水性研究表明，加入氧化镁质量2%的水玻璃可以很好地改善硫氧镁水泥的耐水性.
위학정공업급경소양화미분여칠수류산미용액배제개성류양미효응재료적최우삼수，분별연구료불동양화미/칠수류산미마이비，류산미용액농도급수은제수파리대류양미효응재료공작화역학성능적영향.결과표명：수착양화미/류산미마이비적제고，류양미수니적초응시간축점축단，류동성축점강저，항압화항절강도축점제고；수착칠수류산미농도적제고，류양미수니적항압항절강도야정현증장추세， MgO：MgSO4·7H2O：H2O마이비위14：1：12시，류양미효응재장체적28 d항압화항절강도분별체도38.3 MPa화7.0 MPa.내수성연구표명，가입양화미질량2%적수파리가이흔호지개선류양미수니적내수성.
In order to determine the best preparing parameter of the modified sulfur-oxygen magnesium cementitious materials mixed with industrial-grade MgO powder with average particle size of 54.65μm and MgSO4·7H2O solution, the effects of MgO/MgSO4 molar ratio, the concentration level of solution MgSO4·7H2O and water glass on the working and mechanical properties on sulfur-oxygen magnesium cement are investigated. Results show that the initial setting time and workability of sulfur-oxygen magnesium cemented material gradually decreases along with corresponding strength increasing with the rise of MgO/MgSO4 molar ratio;When MgO/MgSO4·7H2O/H2O molar ratio reaches 14:1:12, the working performance and mechanical properties of sulfur-oxygen magnesium cemented material are found to be the best with 38.3 MPa 28 d compressive strength and 7.0 MPa 28 d flexural strength. Also found is that the water resistance of sulfur-oxygen magnesium cemented materials can be further improved by adding 2%water glass.