Concrete mixing station in the winter construction need attention

Winter cold weather is the concrete engineering quality accident-prone season, due to low temperature in winter, the temperature difference between day and night, concrete often appears retardation or swelling phenomenon, affecting the normal operation of the project. Because the cement itself is easy to solidify the characteristics of concrete mixing plant is ready to use at any time cleaning, if you want to complete the scheduled production unit per unit time, the cleaning equipment must be very standardized, otherwise not only affect the production, and equipment Itself may also cause some damage, especially in low temperature conditions, many parts of the equipment are prone to freezing, cleaning becomes more difficult. In order to achieve the desired production effect, to avoid the above phenomenon.

1, the equipment temperature control

        Many mixing stations to save costs, equipment and facilities is relatively simple, after entering the winter construction, equipment can not run, not only a lot of waste of manpower, material and financial resources, but also delay time, supply does not affect the company's reputation.In order to ensure the normal operation of the equipment, the normal production of concrete, the silo, the admixture tank and the mixer should be closed and the heating point (stove and electric heating) should be set up Heating.Conditional should adopt the boiler heating, heating pipes should be run through the aggregate warehouse under the material mouth, admixture shed, pool, mixer shed and operating room, not only save time and effort, but also to better ensure that the machine out of the concrete temperature and workperformance.Do a good job of heating the host station heating work, check the heating insulation line, promptly remove the fault and hidden dangers, to ensure the normal operation of the winter in the host system.

2, the material temperature control

        Storage, distribution, antifreeze preparation work of winter materials in the application of various raw materials and equipment of winter facilities, and require procurement work in place in time; responsible for doing insulation work of additive storage.Cement should be preferred Portland cement, ordinary portland cement and early strength cement to improve the early strength of concrete and reduce the frequency of occurrence of frost damage.Sand, stone should give priority to the use of inventory sand, such as the winter into the new sand, sand should be strictly required to enter the water content.Mixing water that is drinking water, winter construction should be hot water mixing, water temperature control at 60 ℃, but not higher tha 80 ℃. 2, the material temperature control

        Storage, distribution, antifreeze preparation work of winter materials in the application of various raw materials and equipment of winter facilities, and require procurement work in place in time; responsible for doing insulation work of additive storage.Cement should be preferred Portland cement, ordinary portland cement and early strength cement to improve the early strength of concrete and reduce the frequency of occurrence of frost damage.Sand, stone should give priority to the use of inventory sand, such as the winter into the new sand, sand should be strictly required to enter the water content.Mixing water that is drinking water, winter construction should be hot water mixing, water temperature control at 60 ℃, but not higher tha 80 ℃.

3, other considerations（www.zzxfjxwm.com）

        Laboratory do a good job in the selection of winter admixture, retest and supporting the experimental work, do a good job during winter high-grade concrete technical reserves; antifreeze selection must be able to meet the sudden cooling and may be the lowest temperature conditions.Strengthen the management during the winter brush brush Taiwan, Taiwan should take measures to keep the car, the pool of the pool in the production process to ensure that the technology department to ensure that the water temperature requirements, and timely cleaning brush car separated after the gravel, To prevent frost.

        Concrete mixing plant in winter construction, in the relevant operation must be based on safety, by the professional staff related operations.In order to avoid the concrete construction in the winter to leave hidden dangers, to ensure project quality.

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