混凝土搅拌站中,夏季施工时,当昼夜平均气温高于30℃时,应对原材料、运输设备等作以下要求:
In the concrete mixing station, when the average temperature of the day and night is higher than 30 degrees, the following requirements should be made when the average temperature of the day and night is higher than that of the raw materials and transportation equipment.
1、混凝土搅拌站对水泥、砂、石的储存仓,堆料场进行遮阳和防晒处理,并在砂石堆上喷水降温,以降低原材料进入搅拌机的温度.
1, concrete mixing station for shading and sunscreen treatment of cement, sand and stone storage bin, stacking yard, and spray cooling on sand piles to reduce the temperature of raw materials entering the mixer.
2、采用冷却装置冷却拌合水,对水管及水箱进行遮阳和隔热处理,同时在拌合水中加碎冰作为拌合水的一部分.
2, the cooling device for mixing water treatment, sunshade and heat insulation of pipe and water tank, while mixing water with crushed ice as part of mixing water.
3、水泥进入搅拌机的温度必须小于40℃.
3. The temperature of the cement into the mixer must be less than 40.
4、砼施工中因考虑坍落度损失较大,可加一定量减水剂和粉煤灰取代部分水泥,以减少水泥用量.
4. In concrete construction, a certain amount of water reducing agent and fly ash can be replaced by a certain amount of water reducing agent and fly ash to reduce the amount of cement because of the large loss of slump.
5、混凝土搅拌站的料斗、储水器、皮带运输机、搅拌楼等加遮阳棚,以免被太阳暴晒,同时可以用水化热较低的水泥进行生产砼.
5, concrete mixing plant hopper, water storage, belt conveyor, mixing building and other shading sheds, so as not to be exposed to the sun, and at the same time, the cement with low hydration heat will be used to produce concrete.
6、生产时,在棚内或气温较低的时间或夜间搅拌砼,以保证砼的入模温度不高于30℃.砼运输时,采用罐车进行运输,尽量缩短运输时间,但严禁在运输过程中任意加水.
6, production, inside or low temperature time or at night to ensure the concrete mixing concrete, the molding temperature is not higher than 30 DEG C. Concrete transport, the tanker transport, shorten the transportation time, but not any water in the transport process.
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