What is the purpose of those gravel stones outside the tank cofferdam?

I think it’s used to neutralize salts and acids; if salts or acids leak out, they will react with these small stones

This is a rather interesting idea. In that case, wouldn’t it be better to use limestone for the stones? Would granite react? --------------------------------------- It is mainly for environmental reasons: a clean surface allows natural precipitation to penetrate, and its cost is lower than that of concrete

Using limestone gravel with a size of 1-3 gives better results: it’s aesthetically pleasing, does not cause tripping hazards, and can also dilute salts and acids

I once saw a factory laying stones under the conveyor belts; it seems the purpose was to prevent weeds from growing there, thereby aiding fire prevention.

It is mainly to facilitate drainage, so that during rain, it is also possible to approach the large tank for operations, sampling, and inspections. As for the neutralizing function, it can be said with certainty that it exceeds the original intention of the designers. Because this cannot explain why there are also stones around the crude oil tank. However, it seems to be a typical Chinese design. In several projects I have been involved in, for the tank areas designed by foreigners, a concrete road is generally built along the large tanks, as well as another concrete road leading from the large tanks to the cofferdam; no gravel is used in the tank areas.

This post was last edited by *nht1 on 2015-9-15 22:25. There are also some around the oil tank. My guess is: first, it’s used to temporarily harden the area; second, it serves as a buffer against external factors such as out-of-control vehicles or people, or objects that are ejected and become out of control, thereby creating a transitional isolation zone to prevent external threats from penetrating. Third is water retention and moisturization: lol, it prevents the loss of oil, acids, and alkalis; in other words, it stops any hazardous substances that may have leaked from spreading, as well as preventing internal leaks from spreading. It also increases the surface roughness, thereby reducing the flow rate. . Fourth is for neutralization; fifth is as backup fire-extinguishing sand. Sixth is to enhance sunlight reflection; have you noticed? In many areas where flammable and explosive materials are stored, white sand is used as a padding, and this might serve to increase reflection and reduce the surface temperature

Prevent dust from rising, stabilize the ground surface, and protect it from erosion by rainwater

My guess is that the main function of the gravel is to allow leakage downward (into the accident pool), which helps to control the spread of liquids. If it is a hardened area, the liquid diffusion area will be very large! If using a ditch to lead to the accident pool, gravel might be better than that, as it won’t get clogged. @Little Chemical Engineer

From the perspective of environmental management, a clean surface allows natural precipitation to penetrate, and its cost is lower than that of concrete

I have no idea what the basis for this is; I really want to know