2. Accurate calculation method: (room length/brick length) × (room width/brick width) = number of bricks used.
3 Common methods: number of tiles = laying area of walls and tiles in the room/[(block length and mortar joint width) × (mortar joint width) ]×( 1 loss rate)
Extended data:
test criteria
Iso iso 9001:iso 9001+0 is used to prove that the organization has the ability to provide products that meet the requirements of customers and applicable laws and regulations, with the aim of improving customer satisfaction. With the continuous expansion and internationalization of commodity economy, in order to improve the reputation of products, reduce repeated inspections, weaken and eliminate technical barriers to trade, and safeguard the rights and interests of producers, distributors, users and consumers.
3c Certification (China National Compulsory Product Certification Certificate): It is a product conformity assessment system implemented by various governments in accordance with laws and regulations to protect consumers' personal safety and national security and strengthen product quality management. The so-called 3C certification is the compulsory product certification system in China. The English name is China mandatory Certification and the English abbreviation is CCC.
dimensional deviation
The dimensions of ceramic tile include side length (length and width), side straightness, right angle and surface flatness. Dimensional deviation refers to the allowable deviation between the average value of these dimensions and the working size.
1. Side length is the length, width and size index of ceramic tile.
2. Edge flatness is the deviation between the edge center and the straight line reflected in the brick plane.
3. Right angle refers to the verticality of the four corners of the tile (put one corner of the tile next to the right angle corrected by the standard board and measure its deviation from the standard right angle).
4. Edge Curvature-The linear distance between the center of an edge of a brick and the two corners of the edge.
5. Surface flatness is measured by three points on the surface of ceramic tile.
References:
Tiles-Baidu Encyclopedia