The durability of consolidated highly porous limestones was tested after salt and freeze–thaw cycles. Three porous limestone lithotypes that were commonly used in construction in the Central-European region during previous centuries were selected for the tests. Specimens of Miocene limestone were consolidated with four different types of ethyl silica-based consolidants (KSE 100, KSE 300, KSE 300 E, KSE 300 HV). After consolidation, the samples were exposed to freeze thaw cycles and salt crystallization tests. Water saturation under atmospherically pressure, capillary water absorption and splitting tensile strength were measured on treated and untreated samples to assess change attributed to consolidation in the open porosity and mechanical parameters. The increase in the tensile strength of the medium-grained samples was higher than that of the consolidated fine-grained lithotypes. The effect of consolidation treatment was very different in terms of pore-size distribution as obtained by Mercury intrusion porosimetry (MIP). Untreated and consolidated samples were subjected to 10 cycles of sodium sulphate crystallization (EN 12370) and 10 freeze–thaw cycles (EN 12371) tests. Experiments concluded that in addition to the initial strength increase after the conservation, the modified pore structure is the crucial factor to evaluate the long-term efficiency of stone conservation.

中文翻译：

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匈牙利硅酸酯固结多孔石灰石的冻融和盐结晶耐久性

在盐和冻融循环后测试了固结的高孔隙度石灰石的耐久性。选择了过去几个世纪中欧地区在建筑中常用的三种多孔石灰岩岩型进行测试。用四种不同类型的乙基二氧化硅基固结剂（KSE 100、KSE 300、KSE 300 E、KSE 300 HV）固结中新世石灰岩样品。固结后，样品进行冻融循环和盐结晶试验。在大气压下的水饱和度、毛细管吸水率和劈裂拉伸强度对处理过和未处理过的样品进行测量，以评估由于开孔率和机械参数中的固结引起的变化。中粒样品抗拉强度的增加高于固结细粒岩型。固结处理的效果在通过压汞孔隙率测定法 (MIP) 获得的孔径分布方面非常不同。未经处理和固结的样品经过 10 次硫酸钠结晶 (EN 12370) 循环和 10 次冻融循环 (EN 12371) 测试。实验得出结论，除了养护后初始强度的增加外，改性后的孔隙结构是评价石材长期养护效果的关键因素。未经处理和固结的样品经过 10 次硫酸钠结晶 (EN 12370) 循环和 10 次冻融循环 (EN 12371) 测试。实验得出结论，除了养护后初始强度的增加外，改性后的孔隙结构是评价石材长期养护效果的关键因素。未经处理和固结的样品经过 10 次硫酸钠结晶 (EN 12370) 循环和 10 次冻融循环 (EN 12371) 测试。实验得出结论，除了养护后初始强度的增加外，改性后的孔隙结构是评价石材长期养护效果的关键因素。