| 1. | A direct method for measuring this is the pressure bleed test .
一种直接测定的方法就是压力泌水试验。 |
| 2. | Standard test methods for bleeding of concrete
混凝土泌水现象的标准试验方法 |
| 3. | This is generally accomplished by using water - reducing admixtures . specify air - entrained concrete for outdoor slabs subjected to freezing weather
也可以使用更高坍落度(的混凝土) ,但(制作混凝土的)混合物必须是设计用于制作不过量泌水和/或分离(混凝土)的(混合物) |
| 4. | 3 prolong the mixing time for 3060 seconds . 4 the concrete mixed with this agent must be strengthened maintenance and the time of wet maintenance should be no less than 14 days
用水量不变，可增加塌落度以上，减少泌水离析，显著改善施工性能，便于插捣密实。 |
| 5. | 5 plasticity retention : it has good plasticity retention and it can reduce the slump loss of the concrete that keep it no more than 2cm in 2 hours . applied to the pump concrete
使用本品能提高混凝土强度和抗冻性，改善混凝土的和易性，降低泌水率，提高混凝土的耐水性。 |
| 6. | These equipments are of few number , easy to operate , no needing to be transported for long distance and reducing the separating of ca mortar mixture
机具设备数量少，操作简单，无需长距离输送，减少了ca砂浆泌水与分离，简化了施工程序，并可灵活选择作业地点，施工周期短，机械化程度高，工人作业劳动强度低。 |
| 7. | Self - compacting concrete is a kind of concrete with low w / b ratio and good workability , which does not need to pug . it is a trend for both the researchers and the concrete engineer
自密实混凝土是一种在较低水灰比条件下，不泌水，不离析，不需振捣或只需少量振捣即达到均匀密实的混凝土，是混凝土工程技术的一个重要发展方向，也是目前国内外学者研究的一个热点。 |
| 8. | By compounding jd with hpp , the " overlapping effect " of two kind superplasticizers was fully manifested . the compatibility of jd with cement and keeping slump value were more improved through this compounding way . meantime , the bleeding and segregation of hpp were overcome too
Jd和hpp复合使用，可充分发挥高效减水剂的“叠加效应” ，进一步提高jd与水泥的适应性，坍落度保持性能，也克服了氨基磺酸盐高效减水剂泌水离析等缺陷。 |
| 9. | In this paper , the so preparing self - compacting concrete with low and middle strength using super fine mountain sand artifical sand and phosphorus slag is studied systemically . through the study the influence of the shape , the proportion of the dust and the grade of sand to the workability and the mechanical property of self - compacting concrete , it is found that super fine mountain sand artifical sand are not suit to prepare low and middle strength self - compacting concrete , but when they are combined and the additive and assistant band material are used , c20 - c40 high performance self - compacting concrete is prepared ; the corresponding additive is developed to solve the delamination caused by the low proportion of banding material ; the evaluating system for the workability of low and middle strength self - compacting concrete is built ; the controlling method for production , construction and curing was set up . and the result of the research is applied into several projects
通过分析特细山砂和机制砂的颗粒形态、粉末含量、颗粒级配等特性对自密实混凝土的工作性能和力学性能的影响，发现特细山砂、机制砂不宜单独用于配制中低强度等级自密实混凝土，宜将特细山砂和机制砂进行合理复配，并选择合适的外加剂和矿物掺合料，优化配合比设计，可生产c20 c40中低强度等级自密实高性能混凝土；研制开发出了具有高效减水、保塑、抗离析功能的外加剂，有效解决了中低强度等级自密实混凝土由于胶凝材料用量少而出现的离析、泌水问题；应用正交设计方法，对因素和水平进行合理选择，确定了生产中低等级自密实混凝土的最优配合比；建立了中低强度等级自密实混凝土的工作性评价体系；提出了生产、施工及养护的质量控制技术方法。 |
| 10. | The binders has supper fluidness 、 bonding capacity 、 water retentivity 、 filler properties , no segregation , no bleeding and supper mechanical properties after harden . it is one of high performance concrete . japanese have been researched self - compacting concrete from 1987 , and used more than 1 . 2millions litres
其拌和物具有良好的流动性、粘聚性和保水性,要求填充性能优异,不离析、不泌水且硬化后具有良好的力学性能,属于高性能混凝土( high - performanceconcrete )的一种。 |
