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防火板的水化反应受生产温度影响很大

  防火板的水化反应受生产温度影响很大。
  Of hydration reaction of fire prevention board is highly affected by the production of temperature.
  防火板在25~40℃固化速率很快,水化相形成和水化放热大部分集中在拌合后1~5h内,防火板固化时本体温度达到60℃以上,反应产物主要是3相水晶复合盐(3Mg(OH)2·MgCl2·8H2O)或者5相水晶复合盐(5Mg(OH)2·MgCl2·8H2O),造成了大量MgCl2剩余,防火板固化后早期强度可能较好,28天或更短的时间强度会迅速下降,出现吸潮返卤;
  Fire prevention board at 25 ~ 40 ℃ fast curing rate, formation and hydration heat of hydration phase mostly in within 1 ~ 5 h after mixing, fire prevention board to curing the body temperature is above 60 ℃, the reaction products are mainly three phase crystal compound salt (3 mg (OH) 2 · MgCl2 · 8 h2o) or 5 phase crystal compound salt (5 mg (OH) 2 · MgCl2 · 8 h2o), caused a large number of surplus MgCl2, fire prevention board after curing early strength may be better, 28 days or less intensity drops rapidly, a halogen moisture absorption return;
  同时防火板制品热应力集中的部位出现变形,热应力向外释放,造成的膨胀应力使制品出现裂纹,严重时防火板制品炸裂。因此高温生产时要做好防火板固化反应温度控制,室内养护时采取措施进行通风散热,室外养护时制品不能暴晒,不能雨淋或洒水,同时采取保湿措施保证防火板正常固化所需水分。www.4546.com
  The part of the thermal stress concentration at the same time, fire prevention board products appear deformation, thermal stress release, outward expansion stress caused by the products appear crack, serious when fire prevention board products. Fire prevention board when you feel so high temperature production curing reaction temperature control, indoor when maintaining measures for ventilation, cooling outdoor products cannot insolate when maintaining, cannot the rain or water, at the same time adopt measures to protect wet, normal curing water needed for fire prevention board.
  低温-5℃~10℃要采取措施加快防火板反应速率,可供暖,也可使用促凝早强剂。防火板固化为放热过程,供暖时也要注意,环境温度不能升高太多,整体温度在20~25℃为宜。
  Low temperature 5 ℃ to 10 ℃ to take steps to speed up the reaction rate of fire prevention board, heating, also can use coagulant early strength agent. Curing exothermic process of fire prevention board, also note that when the heating temperature can not rise too much, the temperature in the 20 ~ 25 ℃ advisable.

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