【摘 要】
：
Low water requirement cements (LWRC) are a new type of hydraulic cements obtained by co-grinding of Portland cement clinker, gypsum and water reducing agent (plasticizer).During the grinding, in the p
【机 构】
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Ural-Omega,PJSC, Magnitogorsk, Russia Magnitogors
【出 处】
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The 14th International Congress on the Chemistry of Cement (
论文部分内容阅读
Low water requirement cements (LWRC) are a new type of hydraulic cements obtained by co-grinding of Portland cement clinker, gypsum and water reducing agent (plasticizer).During the grinding, in the process of interaction between clinker minerals and water reducing agent, cement acquires specific properties, which distinguish it from ordinary Portland cement.Obtaining of low water requirement cement in centrifugal impact mill is accompanied by mechanical activation of milled components and realization of its reaction with water solution ofpolycarboxylate plasticizer.LWRC is characterized by narrow particle size distribution, regular shape and large concentration of defects on which plasticizer can be 《dnoculated》, are typical for particles.Nanostructured plasticizer layer is formed by mechanism of molecular layering on the surface of cement particle.Obtained in centrifugal impact mill low water requirement cements with different material composition has an active from 42 MPa (LWRC 50) to 73 MPa (LWRC 100).On a base this cements heavy concretes with strength class of 50 and higher, with cement consumption per unit of strength up to 8,3 kg/MPa, and frost resistance class over 500 were made.
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