洞石在这一形成过程中，地下水溶解的灰岩中含有较多杂质沉淀下形成的原始线条，当溶解的灰岩变得纯净时，线条就会消失。洞石线条有直纹，弯纹自然形成，无法控制。洞石孔多，抗折抗压强度差。如果受到外力的影响，会产生断裂和大量裂纹，从而失去商业价值。

#洞石的特点

#Characteristicsoftravertine

◆岩性均匀，质地软硬度小，开采加工方便，密度轻，运输方便；

◆具有良好的加工性隔音隔热；

◆孔石质地细腻，硬度小，易雕刻，适用于雕刻材料和异形材料；

◆洞石色彩丰富，纹理独特，孔结构特殊，装饰性能好。

#天然洞石的潜在问题

由于其资源的不可再生性和材料的脆性，天然洞石在当代建筑中的大规模应用受到限制，其中大部分仅用作高档室内装饰的干挂墙体材料。

#人造洞石#

随着人造石技术的迭代和更新，人造石出现在人们的视野中。无论是直线、弯曲线还是其他线条，都可以通过现有技术控制人造石的纹理，从而模仿天然石材的纹理。

Gray terrazzo is a classic terrazzo - the background color is gray, with black, white and various gray gravel textures on it

Shop prefabricated inorganic terrazzo to brighten your eyes when you enter the door; Cleanliness is the first impression, and comfort is a long-term experience; Do not publicize, do not dominate, quietly create a sense of comfort, there is no sense of existence, but there is an indelible concrete existence.

The surface hardness reaches grade 5-7, which is close to the surface of high hardness granite and has better wear resistance. Anti slip and wear-resistant. Because it is ground with crushed stone cement, it has good anti-skid, wear resistance and bearing capacity.

Linear thermal expansion coefficient: 0.5 × 10-1℃C-1
La < 0.1i < 0.1 classification: class a radioactivity
Bulk density: 2.52g/cm2
Mohs hardness: 4.5
Water absorption: 0.22%
Gloss: 50-100
Bending strength: 8.4mpa
Compressive strength: 80MPa
Bending strength: 12.4MPa