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Physical properties and microstructure of ceramic-polymer composites for restoration works

机译:修复用陶瓷-聚合物复合材料的物理性能和微观结构

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Cement mortars prepared with steatite particles have been investigated for restoration of sculptures and other craftworks. This work investigates the addition of a thermoset polymer into cement-based composites reinforced with residues of steatite particles in order to seal the open pores, reduce water penetration and thus enhancing the material's lifetime. A full factorial design of 2'4' type was carried out to investigate the effect of the steatite particle size and polymeric fraction on the physical and mechanical properties of the composite materials, such as bulk density, apparent porosity, elastic modulus and compressive strength. Scanning electron microscopy (SEM) was used to reveal features in the microstructure that are related to the physical properties. Results have shown that highest compressive strength (43 MPa) and lowest apparent porosity (0.19%) are achieved when steatite particles are coarser (ranging from 1.41 mm to 0.42 mm) and 40% of polymeric phase is employed. The composite with best performance also presented texture and colour quite similar to the surface characteristics of the natural soap-stone, which makes it suitable for restoration purposes.
机译:用滑石颗粒制备的水泥砂浆已被研究用于雕塑和其他工艺品的修复。这项工作研究了将热固性聚合物添加到水泥基复合材料中的问题,该复合材料由滑石颗粒残留物增强,以密封开孔,减少水渗透并因此延长材料的使用寿命。进行了2'4'型的全因子设计,以研究滑石粒度和聚合物分数对复合材料物理和机械性能(例如堆积密度,表观孔隙率,弹性模量和抗压强度)的影响。扫描电子显微镜(SEM)用于揭示微观结构中与物理特性相关的特征。结果表明,当滑石颗粒更粗(在1.41 mm至0.42 mm之间)并且使用40%的聚合物相时,可获得最高的抗压强度(43 MPa)和最低的表观孔隙率(0.19%)。具有最佳性能的复合材料还呈现出与天然皂石的表面特性非常相似的质地和颜色,使其适合于修复目的。

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