Cobblestone production base of large cobblestone lawn decorated substation in Henan Province

cobblestone (Gravel) filter material, commonly known as support layer filter material or cushion layer filter material, divided into (natural) goose Pebble And (machining) quartz There are two kinds of gravel. The natural cobbles are excavated, washed and screened by natural rivers, which are nearly spherical and have smooth surface. Gravel is crushed and refined from quartz ore. It is widely used in water treatment supporting layer of waterworks, mechanical filters, anion and cation exchange, etc.
The pebble is mostly round in shape, with smooth surface cement The adhesion of the concrete is poor, and the fluidity of the mixed concrete mixture is low, but the strength of the hardened concrete is low. Pebble performance parameters: surface finish 98%, compressive strength above 600Kg/M2. transformer Pebble: As stipulated by the Ministry, the lower part of large oil immersed transformer shall be equipped with an oil storage tank, with an area slightly larger than the plane occupied by the transformer, a depth of about 1M, and cobbles with a diameter of about 8-10CM shall be laid to absorb oil leakage from the transformer.