Can cement be waterproof?
A friend came to visit yesterday,
He intends doing waterproof by himself,
He went to see the penetrating water repellent and said there are many models, and asked me which one should I buy?
I don't know this, because I have used the waterproofing agent before, I have forgotten its brand, and it has been for so many years.
We Suddenly talked about cement,
My friend asked if I could use cement + water, that is, cement water for waterproofing?
Because he thinks that cement will harden when exposed to water, should it also be can waterproof?
His thought reminded me decades ago.
There was no waterproofing agent at that time,
We are use cement for waterproofing,
but the effect is not good.
And has very high requirements for the quality of construction,
And need do it many times.
Now doing waterproof,
Use professional waterproof materials,
As long as the construction is 3 times,
Base coat + middle coat + top coat,
Construction is divided into 3 times.
And the cement waterproof in the past,
It doesn't mean using cement,
Refers to the use of cement mortar for waterproofing,
Cement + sand + water must be constructed in a certain proportion,
There are requirements for the composition of the material, and the ratio must be correct will to use it.
Therefore, cement mortar waterproofing has very high requirements for the quality of construction, including post-construction maintenance. It should be no one in modern times.
It's too much work, and it may not be done well.
If it leaks,
Brush cement water, that is, cement + water, it will be completed after brushing dozens of times.
The cement water will be sucked in, and after hardening, it achieves the waterproof effect.
But the time limit for this effect is very short,
Because after the cement hardens, it rains,
Soaked in rain for a long time,
The cement block will slowly spit white,
That is, some of the ingredients inside will be diluted by water,
The strength of cement will gradually deteriorate,
Finally, the whole is broken.
The hardness of the cement block is not very large,
When encountering water or acid,
Will melt away, that is, vomit white.
Spit white is the white powder seen on the wall,
That is the cement in concrete or cement mortar,
After encountering water, vomited out.
Therefore, cement will harden when exposed to water, that is the initial stage,
When it hardens, it will dissolve when exposed to water, and part of the substance inside will slowly spit out, commonly known as vomiting.
Cement is mainly made of two materials, clay and limestone, which are fired at high temperatures and mixed in a certain proportion.
去看了渗透型防水剂, 说有很多款, 问我要买哪一种的?
这我就不清楚了,因为以前我用过的防水剂, 我已经忘记他的牌子了, 况且都那么多年了.
所以, 水泥砂浆防水对施工的品质, 有着非常高的要求,包含施工后的养护. 现代应当已经无人在用了.
刷水泥水, 也就是水泥+水, 大概要刷几十次才算完成,
水泥水会被吸进去, 硬化之后, 就达到了防水的效果.
所以, 水泥遇水会硬化, 那是初期,
当其硬化之后, 遇水也会化开, 里面的部分物质, 会慢慢的吐出来, 俗称吐白.