Silicate cement of precenting chlorate corrosion

Abstract

The invention discloses a chlorine-salt erosion-resistant Portland cement, which comprises: Portland cement clinker, mixed materials, gypsum and auxiliary agents, and can also include chopped fibers as required. By adopting the present invention, by proportioning various materials in the cement plant according to the optimal ratio, the obtained cement not only meets the requirements of ordinary Portland cement in terms of strength and volume stability, but also the chloride ion resistance of the concrete prepared with it is much higher. Superior to ordinary Portland cement. Compared with other preparation technologies of chloride-ion erosion-resistant concrete, the present invention is easy to use, as long as one index of water-cement ratio is controlled, concrete with excellent chloride-ion-resistance performance can be prepared very conveniently, so that the preparation of chloride-ion-erosion-resistant concrete returns to The preparation of ordinary concrete, and the production and quality control of chloride-resistant concrete are greatly simplified, thereby greatly reducing the technical threshold of chloride-resistant concrete, and can effectively reduce the engineering cost of chloride-resistant concrete, and promote its popularization and application.

Description

technical field [0001] The invention belongs to the field of Portland cement, in particular to a Portland cement resistant to chlorine salt erosion. Background technique [0002] Reinforced concrete structures have been used for hundreds of years in chloride-salt environments (such as marine environments, deicing salt environments, saline-alkali environments, and environments containing a large amount of chloride ions in water and soil, etc.), but ordinary Portland cement is used to prepare concrete. At the same time, due to the poor resistance to chloride ion erosion of concrete, the steel bars in the structure will corrode quickly, resulting in premature failure of the building. According to the survey, the durable life of reinforced concrete structures made of ordinary Portland cement is usually only about 20 years in the marine environment, which is far from meeting the requirement of 50 years or even longer. [0003] To solve this problem, slag cement was initially use...

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Problems solved by technology

[0009] (3) Since the quality of cement and mineral admixtures produced by different manufacturers is different, each specific project must study the compatibility of cement, mineral admixtures and chemical admixtures, and special anti-chlorine The mix design of salt-corrosion concrete, on the one hand, increases the cost, on the other hand, it also causes the technical threshold of chloride-salt corrosion-resistant concrete to be too high, which can only be applied in large-scale projects, and it is difficult to popularize and use it on a large scale

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