九九99久久-九九99久久精品国产-九九99久久精品在免费线bt-九九99热-九九99热久久精品在线9-九九99香蕉在线视频美国毛片

Service
Feedback Contact us

Question

Location:Home > Service > Question
Superplasticizer affect bleeding and segregation of fresh concrete
Time:2015/11/3 16:57:27                  Click:1654

Segregation is due to the different particle size and density of the concrete mixture of the components and the emergence of stratification. Bleeding is a manifestation of isolated form. Moderate bleeding is usually harmless, if excessive bleeding, it may affect the performance of hardened concrete.
When certain workability of concrete, when incorporated superplasticizer to reduce the water-cement ratio for the purpose of incorporation of superplasticizer can reduce the mixing water, so water will also reduce bleeding. However, if the effective reduction of water-containing form together into lime, calcium sulfate and calcium carbonate precipitate, increasing the likelihood of segregation phenomenon, this time, to increase the amount of cement to improve or remedy. When certain concrete water-cement ratio, the incorporation of superplasticizer to improve the workability for the purpose of superplasticizer can be mixed with fluid concrete mixing high slump while. Fresh concrete segregation does not occur, bleeding phenomenon, a little vibration or without vibration can be poured, so as to make large or complex concrete structures section, pumping process provides favorable conditions.
Studies have shown that mixed superplasticizer concrete slump of 200mm, the secretion of water only 30% of normal concrete. Of course, bleeding and bleeding rate of water and superplasticizer type. Such as amino acid-based superplasticizer dosage is more sensitive, a slight excess can lead to concrete bleeding, segregation. This could be applied to other complex system with a retarding effect, it can also be chemically modified to improve its performance.

Up:What kind of concrete admixtures
Next:None!
logo

Contact us

Address: Tianjin in Jiangsu province Xuzhou city Copper Mt. District Road No. 26:
Hand machine: 18705213191 (Ma Jingli)
Tel: 0516-66658797 Fax: 0516-66658797
Network address: http://www.handsom.com.cn mail box: xingu0516@163.com

Sharing:
  • Mobile QR code:
    Use phone visit!

  • WeChat QR code:
    Use phone visit!

亚洲三区在线观看无套内射 | 国产午夜毛片一区二区三区 | 色综合天天综合网国产成人网 | 久久久久亚洲av片无码 | 亚洲午夜av久久久精品影院色戒 | 国产亚洲精品久久久久5区 日韩放荡少妇无码视频 | 成人观看免费大片在线观看 | 激情内射亚洲一区二区三区爱妻 | 中文字字幕在线中文无码 | 久久久久亚洲av无码专区体验 | 就要精品综合久久久久五月天 | 久久久久人妻一区精品色欧美 | 国产一级特黄aa大片在线 | 999国产精品999久久久久久 | 国产成人免费网站在线观看 | 国产亚洲精品午夜高清影院 | 五十路丰满中年熟女中出 | 中文字幕人成乱码熟女 | 色偷偷88888欧美精品久久久 | 国产肉体xxxx裸体784大胆 | 久久久久久久女国产乱让韩 | 久久久久女教师免费一区 | 日本丰满少妇裸体自慰 | 中文人妻av久久人妻18 | 国产精品国产三级区别第一集 | 国产麻豆一精品一av一免费 | 亚洲国产精品久久久久久无码 | 国产综合色精品一区二区三区 | 亚洲精品无码久久久久牙蜜区 | 美女三级黄色片 | 丰满人妻av无码一区二区三区 | 亚洲另类激情专区小说图片 | 免费无码毛片一区二区三区a片 | 中文字幕无码免费久久 | 国产香港明星裸体xxxx视频 | 久久久精品国产sm调教网站 | 精品无码一区二区三区亚洲桃色 | 福利区在线观看 | 亚洲av无码一区东京热久久 | 毛片女人毛片一级毛片毛片 | 国产精品一区二区手机在线观看 |