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一、快硬水泥锚杆的来由1.国外情况80年美国组织研制在石膏水泥中掺含水微囊药卷式锚固剂。每个药卷中混有含水微囊4～5万个。安装时用锚杆体将微囊挤破,水泥与水均匀混合并迅速凝固。其缺点是微囊在加工运输中易破,微囊的生产工艺较复杂(图a)。苏联研制的是在水泥卷中间夹有含水内囊(用以代替含水微囊),但在锚杆体压破含水内囊时,难以实现水与水泥的均匀混合(图b)。英、法两国是设中心导孔的浸水式水泥卷(图c)。日本制成实心浸水式水泥卷,是由合成材料透水层的内套包着水泥,外加易碎塑料网套。浸水后装入锚杆眼内再安装杆体(图d)。83年日本富斯
First, the reasons for the rapid hardening of cement anchors 1. Foreign circumstances 80 years the United States organizations to develop gypsum cement in water-containing micro-capsule drug-based anchor. Each drug is mixed with 4-50,000 water-containing microcapsules. Install the bolt body to break the microcapsules, cement and water evenly mixed and quickly solidified. The disadvantage is that the microcapsules in processing and transportation easy to break, the microcapsule production process is more complicated (Figure a). The Soviet Union developed a water-filled internal capsule (instead of an aqueous microcapsule) in the middle of the cement roll. However, it is difficult to achieve uniform mixing of water and cement when the anchor body crushes the water-containing internal capsule (Figure b). Britain and France are center-drilled water-soaked cement rolls (Figure c). Made in Japan, a solid immersion type cementitious roll is made of a cement-impregnated inner sleeve of synthetic water permeable layer plus a friable plastic net cover. After immersion in the anchor bolt and then install the rod body (Figure d). 83 years Japan Fu Si