详细信息
文献类型：期刊文献
中文题名：掺合料对泡沫脱硫建筑石膏性能的影响
英文题名：Influence of admixtures on properties of foam desulfurized building gypsum
第一作者：姜浙江
机构：[1]贵州大学土木工程学院,贵州贵阳550025;[2]贵州省岩土力学与工程安全重点实验室,贵州贵阳550025;[3]贵州理工学院土木工程学院,贵州贵阳550003
第一机构：贵州大学土木工程学院,贵州贵阳550025
年份：2023
卷号：50
期号：12
起止页码：24-29
中文期刊名：新型建筑材料
外文期刊名：New Building Materials
收录：CSTPCD
基金：国家自然科学基金项目(52168027,51968009);贵州省科技计划项目(黔科合基础[2020]1Y245)。
语种：中文
中文关键词：泡沫脱硫建筑石膏;复合材料;回归分析;方差分析;微观分析
外文关键词：foam desulfurized building gypsum;composite material;regression analysis;anova;micro analysis
摘要：通过SEM扫描电镜、SPSS迭代回归分析等手段,研究水泥、矿粉和硅灰掺量对泡沫脱硫建筑石膏力学及耐水性能的影响和作用机理。结果表明:单掺水泥与复掺矿粉均可有效改善泡沫脱硫建筑石膏的力学及耐水性能;当掺入10%水泥、14%矿粉时,硬化体的综合性能较优,28 d抗压、抗折强度及软化系数均达最大,分别为18.69 MPa、4.92 MPa、0.486;较大掺量的硅灰易聚团使复合材料浆体体积发生膨胀,导致试样强度及软化系数下降,硅灰掺量不宜大于10%。获得单掺水泥与复掺矿粉时复合材料抗压强度与孔隙率的线性回归模型,模型回归效果显著,回归曲线与试验数据吻合度较高;掺合料的水化产物通过填充和包裹石膏晶体,形成致密的微观结构,进而提升泡沫脱硫建筑石膏的强度和耐水性。
By means of SEM scanning electron microscope and SPSS iterative regression analysis,the influence law and mechanism of different dosages of cement,mineral powder and silica fume on the physical mechanics and water resistance of foamed desulfurization gypsum were studied.The results show that both cement alone and mineral powder can effectively improve the mechanical and water resistance properties of gypsum foam;When mixed with 10%cement and 14%mineral powder,the overall performance of the hardened body is better,with the maximum 28 d compressive,flexural strengths and softening coefficients of 18.69 MPa,4.92 MPa and 0.486;The larger amount of silica fume is easy to agglomerate to make the volume of the composite slurry swell,resulting in a decrease in strength and softening coefficient of the specimen,the amount of silica fume should not be more than 10%.Combined with the experimental data,the linear regression model of compressive strength versus porosity of the composites when single blended with cement and compound blended with mineral powder was obtained,the model regression effect was significant,and the regression curve was in good agreement with the experimental data.Microscopic display,the hydration products of admixtures form dense microstructures by filling and encapsulating gypsum crystals,thereby enhancing the strength and water resistance of foam desulfurized building gypsum.
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