Our company sellsISOstandard sandImplement one-year warranty, replace within three months if there are quality issues, and provide lifelong maintenance.ISOstandard sandExquisite craftsmanship, excellent performance, simple operation, high control accuracy, good reliability, fully meeting the testing requirements. The main products include concrete and cement testing instruments, highway geotechnical testing instruments, asphalt waterproofing membrane testing instruments, chemical analysis instruments, testing machines, scales, test molds, screening tools, etc. We can provide a complete set of testing instruments and inspection equipment for highways, railways, bridges, mixing plants, municipal engineering, colleges and universities, and engineering quality inspection centers.

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Introduction:

Stable quality and low price compared to similar products internationally, it has been favored by many foreign merchants. At present, the product has been sold to South Korea, Southeast Asia, some African countries, and Hong Kong and Macao regions.

Purpose:

It is a reference substance produced according to GB/T17671-1999 idt ISO679:1989 and used to test the strength of cement mortar.

Using natural circular siliceous sand with a silicon dioxide content of not less than 98% as raw material, a series of production processes from raw material mining, rough processing, semi-finished product processing, precision processing to graded packaging are completed under strict quality control. In the various physical and chemical control indicators of ISO in China, if one of them is unqualified, the final product will be scrapped. For several years, the qualification rate of the product has remained at 100%, and the strength comparison with the German benchmark sand has a D value within 2% (ISO standard requires 5%). Chinese ISO adopts small bag packaging, with a net content of 1350g ± 5g per bag. Every 15 small bags are then wrapped in soft materials to form a large bag. Therefore, during transportation and handling, attention should be paid to avoiding collisions with sharp and hard objects that may cause damage to the packaging. When storing, the environment should be kept dry and away from light to prevent the product from getting damp or the packaging from aging rapidly. For damaged or damp products, they cannot continue to be used due to changes in weight, moisture content, and grading.