Main uses of natural pebbles

Pebbles are widely used in public buildings, villas, courtyard buildings, paving roads (cobblestone roads paved in parks can prolong life), park rockeries, bonsai filling materials, garden art and other advanced superstructure. It not only carries forward the ancient culture of the East, but also embodies the classical, elegant and simple artistic style of the West.

Pebbles also provide high-quality materials for water purification, sewage treatment, electricity, gardens and other projects. It also provides raw and auxiliary materials for ceramics, precision casting, paper making, jet mill, chemical industry, monocrystalline silicon and national defense.

Physical parameters of Nanjing Shi Yuhua

Material: more than 95% silicon dioxide (SiO2).

Performance parameters: the surface smoothness is 98%, and the compressive strength is above 600kg /M2.

Transformer cobblestone standard

According to the standards issued by the Ministry of Construction, the lower part of large oil-immersed transformer should be equipped with an oil storage tank, the area of which is slightly larger than the plane occupied by the transformer, and the depth is about 1M, and pebbles with a diameter of about 8- 10CM are laid, with the main purpose of absorbing the oil leakage of the transformer.

Relevant standards:

7.3.4 The code for typical fire protection of electric power equipment (DL5027- 1993) stipulates that it is 50-80mm.

Article 5.4.5 of Code for Design of 3- 1 10KV High-voltage Distribution Equipment (GB 50060-92) suggests laying cobblestone layers with a thickness of not less than 250mm and a cobblestone diameter of 50-80 mm. ..