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首页> 美国卫生研究院文献>Materials >Comparative Study on the Effects of Various Modified Admixtures on the Mechanical Properties of Styrene-Acrylic Emulsion-Based Cement Composite Materials
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Comparative Study on the Effects of Various Modified Admixtures on the Mechanical Properties of Styrene-Acrylic Emulsion-Based Cement Composite Materials

机译：各种改性剂对苯乙烯－丙烯酸乳液基水泥复合材料力学性能影响的比较研究

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This study carried out tensile tests at definite elongation, tensile and shear tests on 4 admixture-modified styrene-acrylic emulsion-based cement composites (SECCs), and measured the strength, deformation, and energy consumption indexes of test specimens, so as to investigate the influences of coalescing agent, plasticizer, silane coupling agent, and nanometer aluminium oxide on the bond, tensile, and shear mechanical properties of the test specimens. Additionally, the Field Emission Scanning Electron Microscope (FE-SEM) test and Mercury Intrusion Porosimetry (MIP) test were conducted on the composite material specimens, to analyze the microscopic mechanism of different admixtures in modifying the mechanical properties of the SECC. The results suggested that the addition of coalescing agent, plasticizer, silane coupling agent, and nanometer aluminium oxide improved the bond, tensile and shear properties of the SECC specimens to various degrees. Of them, the coalescing agent promoted the mutual cross-linking of organic polymers with inorganic products, and optimized the transition interface to enhance the comprehensive mechanical properties of the test specimens; by contrast, nanometer aluminium oxide developed secondary hydration reaction with the inorganic products, and refined the pore structure to modify the mechanical properties of test specimens. Therefore, both of them achieved significant modification effects. Typically, the optimal bond properties of FFAMC, PLMC, SCAMC, and NAMC test specimens were achieved at the coalescing agent, plasticizer, silane coupling agent, and nanometer aluminium oxide addition amounts of 4%, 1.5%, 3%, and 1%, respectively. Besides, the improving effects of different admixtures on the tensile property of SECC specimens followed the order of coalescing agent > nanometer aluminium oxide > plasticizer > silane coupling agent, with the optimal addition amounts of 4%, 1.5%, 1%, and 2%, respectively. In addition, the improving effects of different admixtures on the shear performance of SECC specimens followed the order of coalescing agent > nanometer aluminium oxide > silane coupling agent > plasticizer, with the optimal addition amounts of 4%, 1.5%, 1%, and 1%, respectively.
机译：本研究对4种掺合改性苯乙烯-丙烯酸乳液基水泥复合材料（SECC）进行了确定伸长率的拉伸试验，拉伸和剪切试验，并测量了试样的强度，变形和能耗指标，以进行研究。聚结剂，增塑剂，硅烷偶联剂和纳米氧化铝对试样粘结，拉伸和剪切力学性能的影响。另外，对复合材料试样进行了场发射扫描电子显微镜（FE-SEM）测试和水银压入孔隙率法（MIP）测试，以分析不同掺合料的微观机理，以改善SECC的力学性能。结果表明，加入聚结剂，增塑剂，硅烷偶联剂和纳米氧化铝可在不同程度上改善SECC试样的粘结，拉伸和剪切性能。其中，聚结剂促进了有机聚合物与无机产物的相互交联，并优化了过渡界面，以增强试样的综合力学性能。相反，纳米氧化铝与无机产物发生了二次水合反应，并细化了孔结构，从而改变了试样的力学性能。因此，它们两者均实现了显着的修饰效果。通常，FFAMC，PLMC，SCAMC和NAMC测试样品的最佳粘结性能是在聚结剂，增塑剂，硅烷偶联剂和纳米氧化铝添加量分别为4％，1.5％，3％和1％的情况下实现的，分别。此外，不同掺合料对SECC试样拉伸性能的改善效果依次为：聚结剂>纳米氧化铝>增塑剂>硅烷偶联剂，最佳添加量分别为4％，1.5％，1％和2％。 ， 分别。另外，不同掺合料对SECC试样剪切性能的改善效果依次为聚结剂>纳米氧化铝>硅烷偶联剂>增塑剂，最佳添加量分别为4％，1.5％，1％和1。 ％， 分别。

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