impermeability to water中文什么意思

抗渗水性，不透水性

• water:    n. 1.水；雨水；露；〔常作 pl ...
• water impermeability:    不透水性; 试水膏; 水密性; 水透 ...
• impermeability:    不浸透性; 不能渗透的性质或状态; ...

例句与用法

1. Dormancy for hard seeds is caused by impermeability to water and gas and mechanical constraint of the seed coat
   硬实种子种皮透水透气性差和对胚生长的机械限制，引起种子休眠。
2. Cementitious capillary crystalline waterproofing coating ( abbreviated ccwc ) is a new type of cement - based waterproofing materials , which is characterized by its very good adhesive performance and impermeability to water , self - rehabilitating ability , permanent waterproofing effect , good aging resistance and corrosion resistance , simple construction method and harmless to hunman etc . ccwc consists of ordinary portland cement , quartz sand and reactive substances and other supplementary ingredients , whose reactive substance can permeate into the internal part of concrete structures through water and produce insoluble crystals filling capillary pores or crack of the concret through reaction with cement hydrates and unhydrates
   水泥基渗透结晶型防水材料是以硅酸盐水泥或普通硅酸盐水泥、石英砂等为基材，掺入活性化学物质而组成的一种新型防水材料。掺入的活性化学物质以水作载体向混凝土内部渗透，与混凝土中未水化的水泥及部分水泥水化产物发生结晶反应，生成不溶于水的结晶体，堵塞毛细孔道，使混凝土致密、防水。这种防水材料具有粘结力强、抗渗性能好、自愈合能力强、防水效果持久、耐老化、耐腐蚀、易施工、对人类无害等特点。
3. According to relative criteria , the performance of ash - jd such as ratio of water - reducing , ratio of compressive strength , effect of enhancing strength , ratio of bleeding , air entrainment content , effect of keeping slump value , compatibility with cement , resistance to concrete shrinkage and damage by freezing and thawing and impermeability to water etc are all equal to the traditional aminosulfonic - based superplasticizers , and the ratio of performance to price is better than naphthalene series superplasticizers
   按照相关标准，对产品进行了测试，所开发的低成本改性氨基磺酸盐高效减水剂ash - jd的各项性能如减水率、抗压强度比、增强效果、引气性、坍落度保持效果、与水泥适应性、收缩性能、抗冻融性能、抗渗性能等相当于传统氨基磺酸盐高效减水剂，性能价格比优于萘系高效减水剂。