Thaumasite form of sulfate attack inhibitor and preparation method

Abstract

The invention discloses a thaumasite form of sulfate attack (TSA) inhibitor and a preparation method. Mainly constituent components of the TSA inhibitor comprise sepiolite powder, an ionic curing agent, a mineral admixture, sodium silicate, polyacrylamide, an iron salt, glycerol monostearate and the like. The TSA inhibitor can be used for effectively inhibiting the formation of thaumasite, can be used for effectively curing a SO4<2-> ion and retarding the migration rate of the SO4<2-> ion for a long time, is used for improving the pore structure and the penetration resistance of concrete, and on the basis of having no adverse influences on the workability and the mechanical performance of the concrete, can be used for effectively improving and solving the influence, which is brought to the safety of a structure, of the concrete due to the TSA; further, the sources of raw materials to which the TSA inhibitor relates are wide; the preparation process is simple; the popularization and the application are suitable.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a carbosulfonotolite type sulfate corrosion inhibitor and a preparation method thereof. Background technique [0002] In modern engineering construction, cement-based materials are the most widely used man-made building materials, which constitute the main body and frame of civil engineering structures, and mainly bear the load of the main structure of the building and the erosion of the weather environment; therefore, the durability of cement-based material structures Sex becomes an important feature of its performance. At present, limestone has become an important raw material in my country's cement concrete industry. However, when cement-based materials mixed with limestone powder or using limestone aggregates have sufficient sulfate, humidity and temperature (generally considered to be lower than 15°C), it is very likely to suffer from sulphate-type sulfate. Er...

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Problems solved by technology

At present, although there have been reports on products that can resist various types of sulfate erosion damage (wollowstone type, gypsum type, calcium carbon sulfosilicate type), but usually involve a large number of raw materials, the preparation process is complicated, and the transportation cost is relatively high. high

And some research data show that after adding barium salt directly into concrete, although it can improve the TSA resistance performance of cement-based materials to a certain extent, it will affect the workability of cement-based materials, and the improvement effect of such products is only short-term effective, while TSA has a long incubation period, which cannot fundamentally solve the durability problem caused by TSA

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