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The role of hydroxypropyl methyl cellulose in mortar

2025-07-05 14:33:00
9183

为了凝结胶凝材料，如水泥和石膏需要水进行水化。正确掺量的 HPMC 可以在足够长的时间里保持砂浆的水分，使得胶凝材料的凝结硬化得以持续进行。

获得足够的保水能力所需要的 HPMC 掺量取决于:

1、基层的吸收性

2、砂浆的组成

3、砂浆的层厚

4、砂浆的需水量

5、胶凝材料的凝结时间


①纤维素醚保水率与灰浆温度的关系

   温度的变化将会严重影响普通纤维素醚的保水性,而使用优良的羟丙基甲基纤维素醚系列产品则可有效解决高温度下的保水性问题。 在纤维素醚的作用下，水份在一段延长的时间内才被逐步释放到基层或空气中去，这样就保证了胶凝材料有足够长时间与水逐步结晶硬化。 


     不同温度情况下保水性表现:

image.png

②纤维素醚保水率与粘度的关系



 保水率与粘度有一定的关系，当纤维素醚的粘度上升时，保水率也上升;当粘度达到一定高度时，保水率增加的幅度趋于平缓。


    image.png

③保水率与用量的关系


保水性取决于不同轻丙基甲基纤维素醚产品的性能，如添加量、粘度和细度:保水率随着添加量的增加而增加。当增加量进一步增加，保水率增加的趋势变缓。


image.png


：https://www.double-bulls.com/news/news1/95
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The role of hydroxypropyl methyl cellulose in mortar

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About Product

HEC (Hydroxy Ethyl Cellulose)

HEC (Hydroxy Ethyl Cellulose)

HPMC(Hydroxypropyl Methyl Cellulose)

HPMC(Hydroxypropyl Methyl Cellulose)

MHEC (Methyl Hydroxy Ethyl Cellulose)

MHEC (Methyl Hydroxy Ethyl Cellulose)

Re-dispersible Polymer Powder (RDP)

Re-dispersible Polymer Powder (RDP)

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