Anti-freezing concrete using steam-curing technology

Abstract

The invention relates to an anti-freezing concrete using a steam-curing technology. The anti-freezing concrete is characterized in that a freezing and thawing-resistant concrete is prepared from the following components in parts by weight: 10 to 13 parts of cement, 29 to 32 parts of fine aggregate, 43 to 48 parts of coarse aggregate, 4 to 5 parts of ore slag powder, 0 to 0.5 part of silicon ash, 0 to 4 parts of fly ash, 0.2 to 0.4 part of water reducer, 0 to 0.1 part of air entraining agent, and 4.8 to 6 parts of water. The anti-freezing concrete prepared by the formula has the beneficial effects that the speed of finished products of the concrete prefabricated part is accelerated; the freezing and thawing-resistant property can reach F350 or above; the production of a large batch of defective products is avoided; the freezing and thawing-resistant property is higher, the production cost is low, and the strength can meet the engineering requirements.

Description

technical field [0001] The invention belongs to concrete, in particular to a frost-resistant concrete adopting a steam-curing process. Background technique [0002] The frost resistance of concrete is an important technical index of the service performance of concrete in coastal engineering, and it is the primary technical difficulty in the design of concrete durability under the conditions of slightly freezing, cold and severe cold climates in northern my country. The freeze-thaw damage of concrete structure leads to the peeling of the structure surface, and the internal crack expansion and structural failure of hydraulic structural components caused by internal stress damage not only increase the economic cost of structural maintenance, repair, and reinforcement, but also seriously affect the service life of concrete construction projects. [0003] The main causes of freeze-thaw damage to concrete structures are improper construction techniques (such as poor grout stop eff...

AI Technical Summary

Problems solved by technology

The problem with the above method is that although the prepared concrete has good frost resistance, it still relies on the traditional standard curing process.

Since the steam curing process will have a negative impact on the frost resistance of concrete while rapidly increasing the strength of concrete, it is required that the water-binder ratio, slump, and air content of concrete be controlled within a reasonable range. Therefore, the concrete in the above method The mix ratio is not suitable for steam curing process

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