High active cement clinker, high active cement and high-early-strength cement composition

Abstract

The invention provides a high active cement clinker, a high active cement and a high-early-strength cement composition. The High active cement clinker adopted as the solidifying material and the matrix of a high-early-strength cement is characterized by comprising more than 70 % of C3S, less than 5 % of C2S and more than 1 of L.S.D, calculated through Bogue formula. The free lime amount of the cement clinker is 0.5-7.5 % by weight.

Description

technical field [0001] The present invention relates to a high-activity cement clinker used as an early-strength cement-based hardening material and a matrix of an early-strength cement, a high-activity cement formed from the high-activity cement clinker, and an early-strength cement composition using the high-activity cement , the early-strength cement solidification material is used for the reinforcement of soft ground, the improvement of polluted soil, etc., and the early-strength cement is used for concrete blocks, wall panels, concrete piles, fresh concrete, etc. related to construction / civil engineering cement products. Background technique [0002] Historically, it is known that C in cement clinker 3 Early-strength Portland cement and ultra-high early-strength Portland cement, which have more S content than ordinary Portland cement and exhibit good short-term strength, are used in winter concrete, steam-cured concrete products, and soil improvement materials. , heav...

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Problems solved by technology

[0011] However, although the research on the reuse of coal ash, blast furnace slag, sewage sludge, incineration ash, etc. It is for the use of raw materials for cement firing) not much research has been done

[0012] In addition, in the manufacture of early-strength Portland cement and ultra-high early-strength Portland cement stipulated in JIS standards, it is difficult to maintain the quality and performance of the above-mentioned various industrial wastes stably.

[0013] If the early-strength cement is obtained by the invention technology of Patent Document 1, energy costs are required due to the fine powder size, and complicated particle size management is required

In addition, as shown in the description, the cement of the present invention is a special cement, and although it is suitable for cement joint work including vertical pits for oil and gas, it is not suitable for civil engineering construction materials and foundation reinforcement materials.

Therefore, it is also difficult to dispose of the above-mentioned various industrial wastes through the manufacturing process

[0014] According to the invention technology of patent document 2, to obtain C 3 A lot of S, C 2 For early-strength cement with very little S content, SO 3 A large amount is fired at a low temperature, and SO is produced in the exhaust gas X (Oxide of sulfur), so it is difficult to perform stable firing

In particular, it is difficult to use the above-mentioned various industrial wastes as part of the raw materials for cement firing, so it is difficult to treat the above-mentioned various industrial wastes in the technology of the present invention.

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