自流平修补砂浆的干燥收缩研究

文中研究了自然养护和覆膜养护条件下,膨胀剂、硅灰、可再分散乳胶粉对砂浆体积变形的影响.结果显示,在自然养护下,掺入质量分数为10％的膨胀剂后,自流平砂浆短期膨胀后干缩迅速增大,14 d干缩值明显大于空白样,掺入硅灰后对掺10％膨胀剂试件的膨胀和收缩均有抑制作用,掺入乳胶粉后干缩略有增大;而采用覆膜养护时,掺入膨胀剂有良...

Study on Drying Shrinkage of Self-leveling Repairing Mortar

The effects of expansion agent,silica fume and dispersible emulsion powder on the volume deformation of mortar under the condition of natural curing and mulching curing were studied.The results show that,under natural curing,the dry shrinkage after adding 10%expansion agent increases rapidly after short-term expansion,and the dry shrinkage value after 14 days is significantly larger than the blank sample.The addition of silica fume can inhibit the expansion and contraction of the specimen with 10%expansion agent,and the dry shrinkage increases slightly after adding latex powder.When adopting mulching curing,adding expansion agent has a good effect of compensating shrinkage.