Abstract Standard methods for dimensioning stone applications have increased their importance in new construction projects. Natural stones are unique in their structure, and thus, one would expect larger differences in properties when compared with other synthetic competitors. To pursue the objective of meeting technical requirements, very heterogeneous stone slabs (such as exotic materials with high market value) are usually reinforced using epoxy resins embedded in low-density glassfiber, a process showing low mechanical efficiency. In the present work, four types of thermoset resins and two types of glass fibers were used to reinforce a pegmatitic stone from Brazil, in order to determine the flexural strength and compare it to a sound sample. Results after 4-point bending tests show that relative stiffness is not affected by the use of glassfiber solutions, and the standard dimensioning requirements are only attained in accordance to mechanical strength when high-density glassfiber systems are employed in the surfaces submitted to tensile stresses under a flexural loading. This work allows concluding that, when using such exotic and highly heterogeneous stones, conventional reinforcement methods are not adequate, especially for more demanding cladding and flooring applications.

中文翻译：

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根据当前技术要求对“异国情调”建筑石材常规加固方法的性能分析

摘要 石材应用尺寸的标准方法在新的建筑项目中越来越重要。天然宝石在其结构上是独一无二的，因此，与其他合成竞争者相比，人们会期望在性能上有更大的差异。为了达到满足技术要求的目标，通常使用嵌入低密度玻璃纤维中的环氧树脂对非常异质的石板（例如具有高市场价值的奇异材料）进行加固，这一过程显示出低机械效率。在目前的工作中，使用四种类型的热固性树脂和两种类型的玻璃纤维来增强来自巴西的伟晶岩，以确定弯曲强度并将其与声音样本进行比较。4 点弯曲试验后的结果表明，相对刚度不受使用玻璃纤维溶液的影响，并且只有在承受拉伸应力的表面采用高密度玻璃纤维系统时，才能根据机械强度达到标准尺寸要求。弯曲载荷。这项工作得出的结论是，当使用这种异国情调和高度异质的石头时，传统的加固方法是不够的，尤其是对于要求更高的覆层和地板应用。