The existence of water is one of the most effective factors in deterioration of natural building stones. In the process of deterioration, capillary water absorption is the most significant procedure of water penetration into the building stones. Pyroclastic rocks have been widely utilized as building stone especially in historical buildings and monuments since ancient times in the Central Anatolia in Turkey. Nowadays, this type of rocks is used in the restoration of historical buildings as well as in the construction of modern buildings. Pyroclastic rocks are highly susceptible to deterioration process. Capillary rise has a significant influence on water penetration into building stones. Therefore, it is quite important to identify the factors affecting the values of capillarity, capillary rising speed, and capillary rise that define capillary water absorption in these rocks. To this end, pyroclastic rock samples in different textures were compiled from the Cappadocia region, in Central Anatolia. First, petrographic, mineralogical, geochemical, physical, and pore diameter distribution properties of the samples were determined in the laboratory. Then, capillarity values with capillary rise and capillary rise speeds dependent on time were established. Based on the data obtained, correlation coefficients between matrix percentage and capillary water absorption rate and capillary rise values of pyroclastic rocks were calculated and found to be as 0.850 and 0.891, respectively. Thus, the article proposes a new empirical equation to practically calculate the capillary rise value depending on the matrix percentage (MP) and median pore diameter (MPD) values.

水的存在是导致天然建筑石材退化的最有效因素之一。在恶化过程中，毛细吸水是水渗入建筑石材的最重要步骤。自古以来，火成岩被广泛用作建筑石料，特别是在土耳其中部安那托利亚的历史建筑和古迹中。如今，这类岩石用于历史建筑的修复以及现代建筑的建筑。火成岩对变质过程非常敏感。毛细血管的上升对水渗入建筑石材的影响很大。因此，确定影响毛细管值，毛细血管上升速度，和毛细血管的上升定义了这些岩石中毛细血管的吸水率。为此，从安纳托利亚中部的卡帕多西亚地区编辑了不同质地的火山碎屑岩样品。首先，在实验室中确定样品的岩石学，矿物学，地球化学，物理和孔径分布特性。然后，建立毛细作用值，其毛细上升和毛细上升速度取决于时间。根据获得的数据，计算出碎屑岩的基质百分率与毛细吸水率与毛细上升值之间的相关系数分别为0.850和0.891。从而，