欢乐生肖

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欢乐生肖JIANSHUIJIGUOLIANGDUIHUNNINGTUXINGNENGYOUSHENMEYINGXIANG

日期:2019-06-24點擊數:44贊數:0

  減水劑欢乐生肖在工程施工中使用廣泛,過量使用情況時有發生,那么,對混凝土性能有什么影響?

欢乐生肖   RUOJIANSHUIJICHANLIANGZENGJIA,YONGSHUILIANGBUBIAN,ZEKENENGCHUXIANLIUDONGXINGCHAOGUOYUQIFANWEI,HUNNINGTUHEYIXINGBIANCHA,ZAIHUNNINGTUBENSHENZHUANGTAIBUHAODEQINGKUANGXIAKENENGDAOZHIMISHUIZENGJIA,DUIBENGSONGSHIGONGZAOCHENGBULIANGYINGXIANG,BINGQIEMISHUILIANGZENGJIAKENENGDAOZHIHUNNINGTUBIAOMIANQIANGDUHEWAIGUANZHILIANGXIAJIANG。RUOJIANSHUIJICHAOCHAN,DANYONGSHUILIANGXIANGYINGXIADIAO,HUNNINGTUHEYIXINGLIANGHAO,ZEGAIQINGKUANGXIAYINSHUIJIAOBIJIANGDI,HUNNINGTUQIANGDUXIANGYINGZENGCHANG,DUIQITAXINGNENGYIWUBULIANGYINGXIANG。

  減水劑摻量在正常摻量2倍以內,混凝土狀態良好,含氣量小于4.5%,澆注后適當加強表面養護,不會對混凝土性能造成不利影響。

  JIANSHUIJICHANLIANGCHAOGUOZHENGCHANGCHANLIANGJIBEI,QIDUIHUNNINGTUXINGNENGDEYINGXIANGYINGSHIJUTIQINGKUANGERDING。

  1.ZAICHAOGAOQIANGHUNNINGTUZHONG,YINSHUIJIAOBI≤0.3SHENZHIDIZHI0.2,ZAICIQINGKUANGXIATONGCHANGBIAOXIANCHUHUNNINGTUZHUANGTAIDUIJIANSHUIJICHANLIANGBUMINGAN,WEIDADAOLIXIANGDELIUDONGXINGZHUANGTAI,JIANSHUIJICHANLIANGTONGCHANGWEIYIBANZHENGCHANGCHANLIANGDE5-8BEI,JIJUSUOSUANCHANLIANGXUDADAO5%-8%。DUIYUC50YIXIAHUNNINGTU,RUCIGAODECHANLIANGSHIBUKESIYIDE。

  2.JIANSHUIJIBENSHENJUYOUYIDINGDEYINQIXINGHEHUANNINGXING,ZESHUBEICHAOCHANKENENGDUIHUNNINGTUXINGNENGCHANSHENGJIAODABULIYINGXIANG。YIBANLAISHUO,HUANNINGZUFENDEYONGLIANGSHIGENJUQIWENHUANJING、GONGCHENGYAOQIUHEJIANSHUIJIZHENGCHANGCHANLIANGQUEDINGDE,RUOHUANNINGZUFENCHAOCHANSHUBEI,YINHUANNINGZUFENZAIJIAONINGCAILIAOKELIBIAOMIANDEDALIANGXIFU,YINGXIANGJIAONINGCAILIAOZHENGCHANGSHUIHUA,QINGZESHININGJIESHIJIANXIANZHUYANCHANG,ZHONGZEDAOZHIHUNNINGTUSHUTIANBUNINGHUOYONGJIUXINGBUNING。

  3.減水劑欢乐生肖本身無引氣性和緩凝型,成倍超摻后,若不注意及時調整用水量,也可能使新拌混凝土的和易性嚴重變差,產生嚴重的泌水、離析、抓底、板結等現象,且澆注后均一穩定性差,出現內分層現象,導致鋼筋周圍的混凝土水膠比增大,強度下降,使得鋼筋握裹力嚴重下降。嚴重超摻導致的大量泌水也會出現在混凝土表面及與模板接觸的部位,導致這些部位的強度下降,拆模時易出現裂縫、蜂窩、麻面等大量缺陷,使混凝土抵御外界侵蝕的能力大大降低,嚴重影響混凝土的耐久性。

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