High-performance concrete temperature control and maintenance method under strong wind gobi environment

Abstract

The invention discloses a high-performance concrete temperature control and maintenance method under a strong wind gobi environment. The method includes the steps of immediately covering a concrete pouring surface with moisturizing materials and spraying water to conduct moisturizing maintenance after concrete pouring surface finishing construction is completed, conducting temperature reduction through a net awning and by spraying water in the day, conducting heat preservation by covering the concrete pouring surface with the moisturizing materials at night, conducting form removal when intensity of poured concrete meets form removal requirements and the central temperature of the concrete starts to be reduced, removing the net awning, meanwhile, covering the concrete pouring surface with the moisturizing materials and spraying water to conduct the maintenance until a suitable age, removing the covered moisturizing materials after water spraying maintenance is completed, and conducting middle and later period maintenance by coating with a curing agent with brushes. The high-performance concrete temperature control and maintenance method under the strong wind gobi environment solves the difficult technical problems of temperature cracking, shrinkage cracking, delayed crazing and performance degradation of concrete under the strong wind gobi environment with the high-temperature characteristic, the dry characteristic, the strong wind characteristic and the large temperature difference characteristic.

Description

technical field [0001] The invention relates to a temperature control and maintenance method for concrete, in particular to a temperature control and maintenance method for high-performance concrete in a strong wind Gobi environment, and belongs to the technical field of concrete. Background technique [0002] The climate and environment in some areas of Xinjiang, Gansu and other provinces in western my country are extremely harsh, and new concrete projects are facing great challenges. Take the second bid section of the station front project of the Hongliuhe-Hami section of the second double-line Lanzhou-Urumqi railway as an example. The lines of this bid section are all located in Hami City. Dunfeng area is characterized by dry climate, low rainfall, long freezing period, large temperature difference between day and night, strong winds in spring and autumn, short and hot summer, and long and severe winter in winter. January is the coldest month of the year, and July is the...

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Problems solved by technology

[0004] At present, the commonly used temperature control method after mass concrete pouring in China is surface insulation, but because the ambient temperature exceeds 40°C in the strong wind Gobi environment, this temperature control method will further increase the temperature of the concrete core, so it is not suitable for use here; and At present, the commonly used curing methods in China are water culture method and sealing curing method, but these two curing methods require a long curing period, and because the curing water is easily evaporated in the strong wind Gobi environment, and the plastic film used for sealing is easily blown away by the strong wind , requires a lot of manpower, the curing effect cannot be guaranteed, and the cracking in the later stage cannot be prevented, so it cannot meet the maintenance requirements of concrete under this harsh condition

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