Expanding admixture, non-shrinking waterproofing Portland cement with expanding admixture and the process of its production

摘要

(54) Expanding admixture, nonshrinking waterproofing portlandcement with the admixture and the process of its making (57) the invention relates to the field of building materials, namely, cement admixtures, the cements with the admixtures described above and the process of their making; it can be used in cement and construction industry as well. The embodiment of the invention thereof is: 1) an expansive admixture including three components, namely, sulphoaluminate klinker burnt in reducing medium, (% by mass) , consisted of C 4A3 S 20 - 65, C 7-9 A2-3 S2 15 - 30, C 1.8-2.3 S 0.5 - 55, CA 1 - 5, C S 3 - 10, additions ( the rest), organic components, aromatic and higher fatty acids , a relationship among the masses of the components is 1 : (0.025 - 0.3) : (0.02-0,2); 2).nonshrinking waterproofing portlandcement including: matrix ingredient ,namely, portlandcement klinker and gypsum stone as well as an expanding admixture ,a relation among the masses of the components is 100 : (2 - 4) : (1.5 - 4); 3) the process of making the portlandcement lies in the dead burning of the sulphoaluminate klinker in the admixture carried out at the temperature providing the quantity of the following additions (% by mass) C 3S o.5 - 3, and C 12A7 0.3 - 2, joint or separate grinding with further mixing the (cited)hydraulic binding and the expanding admixture being carried out up to the uniformly distributed water repellant film formation of the expanding phase on the particles of the product in accordance with the criterion of the globular mass formation after mixing the finished product with water, the mass being homogenized by mixing and grinding as long as homogeneous cement/water suspension The invention proposed offers saving in the use of the expanding agent at least 5 times as much compared with the minimum quantity of it in the known nonshrinking cement, its storage in silos and containers as well as the transportation of the nonshrinking cement according to the invention much as the transportation of portlancement