Solar heating and heat preservation curing method for railway concrete prefabricated part

Abstract

The invention discloses a solar heating and heat preservation curing method for a railway concrete prefabricated part. The heat release of the concrete is fully utilized through solar heating, the heat preservation is carried out by virtue of a polyurethane, the purpose that a railway concrete prefabricated part is free of steam curing in winter is achieved. The method mainly comprises the following steps that heating air by utilizing solar energy, bubbling the hot air into a heat preservation space, the prefabricated part concrete with relatively low temperature is heated, heat release is carried out after the concrete is hydrated, heat preservation measures are used for preventing the temperature of the concrete from being lowered, redundant materials are stored in a phase change energystorage material, when the temperature of the concrete is reduced, the phase change energy storage material in a polyurethane heat preservation wall releases heat, the hydration hardening of the concrete is accelerated. The method has the characteristics of energy conservation and environmental protection, environmental friendliness and low carbon, and low economic cost, the quality of the railwayconcrete prefabricated part can be improved, the steam curing of the railway concrete prefabricated part can be replaced, and the non-steam-free effect is achieved.

Description

technical field [0001] The invention belongs to the field of production and manufacture of railway concrete prefabricated components, and designs an effective solar heating and heat preservation maintenance method for railway concrete prefabricated components. Heating and heat preservation of prefabricated components. Background technique [0002] Compared with the cast-in-place molding process, the factory manufacturing of concrete prefabricated components is less affected by the environment, has a high degree of automation, refinement and integration, and the production process is controllable. Prefabricated components have more advantages in product quality and production cost. Therefore, So far, railway concrete prefabricated components are still a large number of structural components used in railway engineering construction, ranging from small concrete prestressed sleepers, track slabs, pipe piles and segments to large concrete prefabricated T beams and 32m simply supp...

AI Technical Summary

Problems solved by technology

However, steam curing needs to burn a large amount of fossil fuels, release a large amount of sulfide and nitrogen, and increase the degree of environmental pollution, especially in winter, when the ambient air quality is poor, requiring prefabricated component production units to shut down and reduce gas This will undoubtedly have a certain impact on factory production efficiency; in addition, compared with natural or standard curing, steam curing tends to cause coarse pores on the surface of components, which affects the long-term durability of concrete structures. It has been reported that, in addition, steam curing also increases certain economic costs