The relevant provisions of the quality of products must be qualified pebble, you should use the cobblestone pavement after the test, there must be a single factory quality certification and testing. Sampling tests before use in accordance with different varieties and specifications, origin, batch. The pilot project will sand sieve analysis, clay content, mud content. Pilot project will have a sieve analysis gravel, clay content, water content of the mud pebbles, needles, tabular grain content, crushing indicators. For the special requirements for the preparation of gravel concrete projects corresponding test needs to be done. There are the following circumstances, such as the import of pebbles, no certificate of pebbles, gravel quality of suspicion for pebble bearing structure, and must be re-examination, should be re-tested with concrete. Pebble unqualified shall not be used. The need to take certain actions before use of technology, should first meet technical requirements, and subject to the relevant technical director after the signature approval before use. Pebble products factory certification by manufacturers quality inspection departments to provide to the provisions of the use of units variegated pebbles, to prove their product quality targets have been attained. Its main contents include: date of manufacture, inspection department seal, certificate number, species, size, quantity, particle size distribution, density, clay content and other data and conclusions. Information staff should be timely collection, collation, verification gravel factory quality certification and test report card. Its quality certification and test report card should be legible, the project is complete, accurate, true and shall Missing or incorrectly, and no unfinished business, and shall not be altered, forged, damaged or random pumping withdraw. Factory as larger quantities and provide certification and less time, do copy (eg copy) for future reference, and should indicate the original card number, storage unit, transcripts time, and should be signed transcripts, transcripts Seal . Quality certification by the remarks column on gravel fill out the use of project construction unit name, the use of the site and so on. Spirit pebble Specifications (1), the plant transformer special natural pebbles: 5-8cm, 8-12cm; (full inspection by the power sector) (2), pebbles series: 2-4mm, 4-8,8-16mm, 16-24,24-32 mm; (filtered water only); (3), garden Pavement Engineering Series: 1-3cm, 3-5cm, 5-8,8-16,16-25,25-40; (pavement Laying use) (4), water cushion series: 2-3cm, 3-5cm, 5--8,8-16,16-32; (water treatment plants, sewage treatment plants with a) (5), chemical plants Special Series: black natural pebbles, specification: 5-8cm, 8-12cm; (acid resistance, resistance to corrosion) cobblestone uses: cobblestone are widely used in power plant transformers, water filter pads, public buildings, villas, courtyard, garden pavement, river embankment, lake, chemical plants, sewage plants, steel mills, water plants and other projects, is an excellent material of choice. Saatchi water (Figure) | Landscaping Cobblestone | Jinzhong pebbles by water purification materials Co., Ltd. Henan Spirit. Spirit Henan water purification Material Co., Ltd. (www.gyssjs.com) is a professional, "polyacrylamide, PFS, activated carbon, fiber ball, water treatment materials," the company. Since its inception, we adhere to the "good faith, sound management" approach, the courage of healthy competition in the market, so that the "Golden Age" brand has a good reputation. We adhere to the "first, customer first service" principle, so that water Saatchi has won the trust of all the customers in the water treatment chemicals, and establish a good corporate image. Special Note: This information is for reference only pictures and information, please contact us to obtain the most accurate information, thank you!