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A range of characteristics distinguish the use of Portland cement PCA in the manufacture of asbestos-cement products. The initial hydration of cement in the manufacture of asbestos-cement products occurs at a very high water-cement ratio; during the manufacturing process, a large amount of water is filtered, sucked out, and squeezed out of the heavily watered asbestos-cement mass. The cement particles must be small enough to stick to the asbestos fibers; however, their excessive dispersion will increase the binder's water demand, negatively affecting the product's dehydration and compaction. In this case, According to GOST 9835-77, Portland cement must have a minimum surface area of at least 2200 cm2 / g and not more than 3200 cm2 / g of grinding fineness.

This cement's clinker must have a C3S content of not less than 52 percent and a CsA content of not less than 3 and not more than 8. The maximum amount of CaOslob allowed is 1, and the maximum amount of MgO allowed is 5%. It is acceptable to use additives that do not degrade the consistency of cement in quantities of no more than 0.5 percent by weight of cement to speed up the grinding of clinker. The beginning of the setting of this cement should occur no earlier than 1.5 hours after mixing, and the end should occur no later than 10 hours after mixing.

According to GOST 310.1-76, Portland cement for the manufacture of asbestos-cement products is classified into grades 400 and 500 based on samples from a 1: 3 solution (as amended) Portland cement used to produce asbestos-cement products has almost equivalent building properties to ordinary Portland cement, with the exception of more intensive hardening and an improvement in strength at the start.

Order

You can order Asbestos-cement products PCA on the website by leaving an online application. You can also call directly by phone. Managers will help you place an order. We work with large and small wholesale clients. We organize deliveries to anywhere in Uzbekistan. We also export products to Russia, CIS countries and foreign countries. In your order, you can vary the delivery time, order quantity, color and size of the product.