墙上出现白色粉末状物质怎么办·

2024-11-24 11:07:19
推荐回答(4个)
回答1:

当墙壁在雨季漏水、渗水或建筑物通风不良,环境中累积了大量的水气,此水气再遇上空气中的二氧化碳或二氧化硫等酸性气体,即形成酸性水气,进而在水泥墙上凝结成酸性水露。因为墙面防水不良或有隙裂缝而渗透到墙壁内而与水泥、砂、砖墙里的碱性分子产生中和作用,再与空气中的二氧化碳结合成结晶体。

出现这种情况,是由于勾缝剂为劣质勾缝剂材料,属于假冒伪劣产品,将缝隙处的填缝材料刮除后,采用品质的勾缝剂重新勾缝即可。

扩展资料:

注意事项:

1、注意保存好涂料。涂料是易燃物品,夏季气温高,很容易因存放不当造成火灾。因此,夏季涂料要存放在阴凉通风的地方,而且储存容器密封性一定要好。还需注意远离明火和电线插座,以免产生火花引燃涂料。通常建议购买的涂料在一个月内使用掉。

2、延长墙面腻子干透时间。涂刷墙面前先要刮批腻子,一般需要刮1-3遍,其间正常的干透时间为1-2天。在夏季装修,尽可能延长腻子干透的时间,一般以2-3天为宜。因为夏季天气又热又湿,特别是大风雨到来的时候,腻子风干的时间会加长。

3、墙面难干处理方法。在夏季,极容易出现墙面已经干透的假象。在施工时,施工人员一定要确保墙面基层完全干透下再涂刷墙漆。有条件的应该借助专业仪器测定墙面含水率,达标后再进行施工。如果由于高湿高温让墙面难干,可使用抽湿机作为辅助加快墙面干燥速度。

参考资料来源:百度百科-墙壁

参考资料来源:百度百科-返潮

回答2:

是泛碱现象。

泛碱现象是指家庭,或工程建筑使用的硅酸盐混凝土,在经过一段时间后,墙面会出现盐霜似的晶体。毛坯房会直接析出,装潢过的,涂料油漆等会鼓起、起皮、脱落。此种现象称为“泛碱”现象。

产生原因:

混凝土成分为硅酸盐,遇空气或者墙体内的水气,发生水解反应,生成的氢氧根与金属离子结合形成溶解度较小的氢氧化物,遇到气温的升高,水蒸气蒸发,将氢氧化物从墙体中析出,随着水分的逐渐蒸发,氢氧化物就被析出于混凝土水泥表面,日积月累,使得原本装饰的涂料或者油漆等物被顶起,不再黏附墙面,就发生泛白、起皮、脱落现象。

扩展资料

一旦出现泛碱现象,可先用10%的草酸溶液,对泛碱部分进行洗刷,然后再用清水冲洗干净,待建筑材料充分干燥后,再用超强渗透、迅速固化的NC304S纳米级固化剂喷涂,或者用NC304W进行绝对地防水处理,可使泛碱现象不再发生。

参考资料来源:百度百科-泛碱现象

回答3:

是水泥墙壁受到水气侵蚀,当水气进出水泥隙缝裂缝时,发生「酸碱中和」所产生的碳酸盐(尤其是碳酸钙)结晶体(亦即所看到的毛状白色物),当其淤积墙面上造成墙面涂料壁纸起泡、鼓起、碎裂、剥落;所以水气才是真正的肇因祸首。当墙壁在雨季漏水、渗水或建筑物通风不良,环境中累积了大量的水气;此水气再遇上空气中的二氧化碳或二氧化硫等酸性气体,即形成酸性水气,进而在水泥墙上凝结成酸性水露(亦即有如酸雨一般,PH值可达4.0之低);此酸性水气、酸性水露,会因为墙面防水不良或有隙裂缝而渗透到墙壁内而与水泥、砂、砖墙里的碱性分子(如钠、钙、镁、钾)产生中和作用,再与空气中的二氧化碳结合成结晶体,这就是你所看到的白色针状或粉末状的东西了。
办法是可以重新粉刷,以后保持室内干燥

回答4:

.
墙体这样的现象是墙体里的碱气往外返,不知道你们家房子建成多久了呢,如果建成的时间不长的话你可以找开发商协商此事,此类问题应该属于建筑材料的问题,跟装修或者物业管理的应该关系不大。

希望能帮到你!望采纳!!!

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