Rainwater drainage covers are a crucial component of urban drainage systems, their core function being to ensure unobstructed drainage while guaranteeing pedestrian safety. Sesame White granite drainage covers, a typical example of granite material, are widely used in municipal roads, landscaping, and commercial drainage applications due to their anti-slip, pressure-resistant, and corrosion-resistant properties. This article will analyze their technical principles and selection logic from three aspects: material characteristics, technological advantages, and applicable scenarios.
Granite, as a natural stone, is characterized by high density and a compact structure. Taking Sesame White granite drainage covers as an example, its specific gravity reaches 2.7 g/cm³, its hardness is 80, its compressive strength is as high as 1200 MPa, and its flexural strength is 13.5 MPa. This means it can withstand the pressure of heavy vehicles without deformation or cracking. After a flame-treatment process, the stone surface develops micro-textured patterns, enhancing its anti-slip performance (increasing the coefficient of friction by 30%) while retaining the rugged texture of natural stone. Furthermore, granite has a water absorption rate of less than 0.5%, effectively resisting rainwater erosion and chemical corrosion, with a service life of over 20 years.
In application scenarios, the sesame white glossy drain cover's off-white tone harmonizes with most urban environments, and its impurity content of only 1% and surface gloss of 80% satisfy both functional and aesthetic needs. Its dimensions can be customized to fit different groove widths, and its embedded design ensures flush installation with the ground, avoiding tripping risks. For areas requiring frequent cleaning, the microporous structure created by the flamed finish further reduces stain adhesion and lowers maintenance costs.
From an industry trend perspective, with the advancement of sponge city construction, drainage systems place higher demands on the load-bearing capacity, slip resistance, and permeability of drain covers. Granite drain covers, through material and process innovation, provide a more reliable solution for urban infrastructure while ensuring drainage efficiency. Their natural material properties also meet green building standards, making them a preferred alternative to traditional cast iron drain covers.
