# Cement v.s. Concrete

**URL:** <https://boards.straightdope.com/t/cement-v-s-concrete/341744>\
**Category:** Factual Questions\
**Created:** [January 26, 2006, 8:15pm UTC](https://boards.straightdope.com/t/cement-v-s-concrete/341744 "2006-01-26T20:15:11Z")\
**Posts on this page:** 7\
**Page:** 2

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**Author:** ![danceswithcats](https://avatars.discourse-cdn.com/v4/letter/d/9e8a1a/32.png) [@danceswithcats](https://boards.straightdope.com/u/danceswithcats)\
**Post date:** [January 28, 2006, 4:25am UTC](https://boards.straightdope.com/t/cement-v-s-concrete/341744/21 "2006-01-28T04:25:48Z")

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This is why you always install control joints in cementitious flatwork-they direct _where_ the quacking will take place. Without them, quacks can randomly occur. 😉

d&r 😃

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**Author:** ![Sunspace](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/sunspace/32/1250_2.png) [@Sunspace](https://boards.straightdope.com/u/Sunspace)\
**Post date:** [January 28, 2006, 8:01am UTC](https://boards.straightdope.com/t/cement-v-s-concrete/341744/22 "2006-01-28T08:01:17Z")

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You can put in the control joints, but sometimes the things quack wherever they want anyway.

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**Author:** ![danceswithcats](https://avatars.discourse-cdn.com/v4/letter/d/9e8a1a/32.png) [@danceswithcats](https://boards.straightdope.com/u/danceswithcats)\
**Post date:** [January 28, 2006, 8:16am UTC](https://boards.straightdope.com/t/cement-v-s-concrete/341744/23 "2006-01-28T08:16:09Z")

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> [@Sunspace](#):
>
> You can put in the control joints, but sometimes the things quack wherever they want anyway.

Which puts the masons in a fowl mood.

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**Author:** ![Declan](https://avatars.discourse-cdn.com/v4/letter/d/ecae2f/32.png) [@Declan](https://boards.straightdope.com/u/Declan)\
**Post date:** [January 28, 2006, 8:39am UTC](https://boards.straightdope.com/t/cement-v-s-concrete/341744/24 "2006-01-28T08:39:49Z")

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> [@Cartooniverse](#):
>
> When the newest and last layer of this material dries, will it shrink- thus giving me a perfectly smooth top layer that’s 1/16 inch lower than the old floor? If shrinkage IS an issue, how does one avoid such?

When I worked for a home builder , we would normally have to do some rework on cement basements that were in need ,and used a product called fastcrete ,which is probably just another franchise name of some of the other products mentioned.

It was mixed with water , poured and would self level , but pouring to the lip of the hole , would yield a small depression about a 1/16 of an inch , as indicated on other posts , you would have to over pour by a certain amount , and was almost an art depending on what needed to be filled.

Declan

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**Author:** ![Cartooniverse](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/cartooniverse/32/3084_2.png) [@Cartooniverse](https://boards.straightdope.com/u/Cartooniverse)\
**Post date:** [January 28, 2006, 2:01pm UTC](https://boards.straightdope.com/t/cement-v-s-concrete/341744/25 "2006-01-28T14:01:05Z")

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> [@danceswithcats](#):
>
> Which puts the masons in a fowl mood.

I was going to feather my cementitious joints in the hopes of **not** running afowl of this problem. Apparently my goose is cooked anyway.

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**Author:** ![slaphead](https://avatars.discourse-cdn.com/v4/letter/s/e9bcb4/32.png) [@slaphead](https://boards.straightdope.com/u/slaphead)\
**Post date:** [January 28, 2006, 4:05pm UTC](https://boards.straightdope.com/t/cement-v-s-concrete/341744/26 "2006-01-28T16:05:30Z")

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> [@danceswithcats](#):
>
> scabbling

Thank you for this word. It not only sounds cool but also [looks cool](http://www.concretecleaninginc.com/scabbling.htm)

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**Author:** ![Cartooniverse](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/cartooniverse/32/3084_2.png) [@Cartooniverse](https://boards.straightdope.com/u/Cartooniverse)\
**Post date:** [January 29, 2006, 2:46am UTC](https://boards.straightdope.com/t/cement-v-s-concrete/341744/27 "2006-01-29T02:46:59Z")

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**Scabble** : great word for Scrabble. OR Boggle 🙂

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