有没有人研究过或量化XPS泡沫的缩小？
我正在为我的家庭建造一座新房子做地基工作。在垫下，我放了3.5″层回收XPS。然后我想我应该在上面放点东西让接缝重合。所以木材场有XPS的。5″的4X8张，这不是很多的r值，但我主要想在更厚的回收XPS的接缝上有一些东西。我知道EPS对环境更好，但他们没有。不管怎样，我花了很多时间，确保连接处很紧，所有东西都摆放得很好，没有任何缝隙。我没有把它粘起来，因为我认为它是在聚乙烯和混凝土下面，它不应该移动太多，我没有密封任何东西。幸运的是，没有风，泡沫在那里停留了大约5个晴天，然后在上面涂了一层聚脂。我注意到泡沫缩小了，或者是脚变大了，但我不这么认为。到处都是裂缝。 I know Joe Lstiburek has mentioned this before but I had no idea it would happen that fast. Has anyone studied this? I plan on applying two layers of 1.5″ XPS to achieve 3″ on the exterior of my new home. Would laying out the layers shrink the foam ahead of time? That would be a pain in the butt. I would think the thicker sheets would probably take longer to shrink. Also what is the relationship causing the shrinking. Temperature? Does the sun have anything to do with it? Other than staggering and taping seams is there anything I can do to prevent or minimize these gaps from occurring over the long run? Some other things worth noting is the pile of new .5″ XPS sat in a stack outside for about 2 weeks before it was laid out, I have no idea how long it was at the lumberyard. Also worth noting is the 3.5″ reclaimed XPS was out for a few days in the sun and did not shrink at all. I imagine is has already shrunk. On a last note the reclaimed board is of the blue brand and the shrinking .5′ XPS was of a green brand. Thanks for any input.
答案
狄龙,
我在我的文章中讨论了你的问题，使用硬质泡沫作为防水屏障．
向下滚动并找到标题，“硬质泡沫板会收缩吗?”该标题下面的文章将讨论您的问题。注意，有几张XPS面板的照片已经缩小了。
马丁，
我读过你的文章，再次审查了这一点。幸运的是，泡沫不会成为我的WRB的一部分。虽然我仍然想知道泡沫萎缩的关系是什么。木材尺寸随MC，金属和乙烯基改变温度。可能有多个东西造成泡沫的变化吗？泡沫是否会在温度变化下变化尺寸，或者在随着时间的推移后才能关闭和缩小，才会关闭且萎缩？是否有加速或增加收缩的条件？会立即覆盖泡沫的房子包裹慢慢下降，因此收缩？虽然你的文章讨论了多年来已经收缩的泡沫，但我非常惊讶地看到.5“厚厚的泡沫在短短几天内缩小萎缩。我想到了一般答案将是每个制造商使用不同的公式，所以每个制造商都将泡沫表现不同，但我想也许有人对此有一些见解。
狄龙,
和你一样，我也想知道你问题的答案。我曾试图找到其中一些问题的答案，但硬质泡沫制造商聘请的技术专家一直没有给出答案。发泡剂和制造过程可能会发生变化，而且是被严密保护的工业机密，这一事实(正如你正确猜测的那样)使问题变得复杂。