环氧地坪起泡原因
Reasons for foaming on epoxy floor
环氧地坪起水泡多发生在一楼或地下室，有时二楼以上也时有发生，环氧地坪起水泡一般在施工后不久就发现，有的上午铺贴的环氧地坪下午就有水泡。水泡由小到大，不断发展，发展到一定程度后停止。气温越高，水泡就越容易发生，发展的速度也越快。水泡形状各异，其大小不一。有的水泡直径达1m以上，高度达20~50mm。 水泡的产生与施工地区没有明显的关系，同一地区有的严重，有的较轻，有的完好。同一小组操作，同一材料施工的环氧地面层，有的起水泡，有的完好，说明水泡是多种因素造成的。 起水泡的原因，是大家关心的一个问题，剖开水泡发现，泡内都含有水分或炎黄色液体，环氧地面层与基层脱离，粘在基层上的胶结料被拉成峰窝状；按照“物理学”解释，在盛有液体的密闭容器内，液体蒸发，形成饱和状态的三条曲线的温度与压力关系。 在密闭的容器内，含有饱和水蒸汽的压力，是随着温度的升高而上升，当温度为20.C时，鼓包内的压力为0.01MPa；而当温度为70~80.C之间是直线上升到0.1MPa；很多地区在炎热的夏季地面的极端辐射热可达70.C左右，在这样的高温下，环氧胶结料已经软化粘力大大降低，因此就形同向轮胎内渐渐鼓气一样，使环氧地面层中鼓起了大包，将胶结料被拉成蜂窝状；其中没有起水泡的部分环氧层和地面部分粘结不牢固，仔细观测接触部分，也会发现有无法固化的部分，原因是环氧有潮气不能固化；那么水分从何处来的呢？主要有以下几个水的来源：1.基层、如水泥砂浆找平层，最大含水率达12%左右，基层的最大含水量大于找平层。2.环氧中的其它配料内的脱水不尽。3.环氧和基层施工时结合不好留下空隙和环氧本身的化学活性，没有完全固化或者是遇到潮湿气没有完全固化的残留物或气体。4.基层的地下渗透的潮湿气体。
Epoxy floor blistering often occurs on the first floor or basement, sometimes above the second floor also occurs, epoxy floor blistering is generally found shortly after construction, and some morning covered with epoxy floor blistering in the afternoon. The bubble develops from small to large, and develops to a certain extent and then stops. The higher the temperature is, the quicker the bubble develops and the faster it develops. The shapes of vesicles vary and vary in size. Some vesicles are more than 1m in diameter and 20~50mm in height. There is no obvious relationship between the blister and the construction area. Some of the blisters are serious, some are light and some are intact in the same area. Some of the epoxy surface layers constructed with the same material and operated by the same group were blistering or intact, indicating that blistering was caused by many factors. The reason for blistering is a matter of concern. Opening the blister, it is found that all the blisters contain water or yellowish liquid, the epoxy surface layer is separated from the base layer, and the binder adhered to the base layer is pulled into a crest-like pit; according to the "physics" explanation, the liquid evaporates and forms a saturated state in an airtight container containing liquid. The relationship between the temperature and pressure of the three curves. In sealed vessels, the pressure of saturated vapor rises with the increase of temperature. When the temperature is 20.C, the pressure in the bulge is 0.01 MPa; when the temperature is between 70 and 80.C, it rises to 0.1 MPa in a straight line; in many areas, the extreme radiant heat of the ground in hot summer can reach about 70.C, at such high temperatures. Epoxy binder has been softened and the adhesive force has been greatly reduced, so as to gradually inflate into the tire, so that the epoxy ground layer bulged up, the binder was pulled into honeycomb; there is no blistering part of the epoxy layer and the ground part of the bonding is not solid, careful observation of the contact part, will also find that there can not be cured. In part, the reason why epoxy is moisture can not solidify; where does the moisture come from? There are mainly the following sources of water: 1. The base, such as cement mortar leveling layer, the maximum moisture content of about 12%, the maximum moisture content of the base is greater than the leveling layer. 2. other ingredients in epoxy are not dehydrated. 3. The combination of epoxy and base course construction is not good enough to leave voids and the chemical activity of epoxy itself, not completely cured or encounter moisture not completely cured residue or gas. 4. grass-roots underground infiltration of moist gas.