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#1
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Another Cement Mixing Question
The only hand-mixed cement question I have involves color. Is there an
additive to get hand (bag or portland-sand-stone) mix to bleach out? The ready-mix always bleaches to a nice bright white. I used to do concrete work for a contractor, and I would often be the one stripping forms and wetting the setting concrete. I have never been able to duplicate the nice bleaching with a bag mix. |
#2
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Another Cement Mixing Question
I mostly find it all looks the same after it has weathered. After that color
depends on the color of the sand and the color of the gravel. New concrete has a lot of the Portland Cement on the surface, probably what you called bleaching, which disappears quickly in the presence of rain, usually acid rain, leaving the sand and gravel showing on the surface. wrote in message oups.com... The only hand-mixed cement question I have involves color. Is there an additive to get hand (bag or portland-sand-stone) mix to bleach out? The ready-mix always bleaches to a nice bright white. I used to do concrete work for a contractor, and I would often be the one stripping forms and wetting the setting concrete. I have never been able to duplicate the nice bleaching with a bag mix. |
#3
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Another Cement Mixing Question
Are you left w/ a green-ish color?
Thought that was kind of weird myself. But then, I like green. -- Mr. P.V.'d formerly Droll Troll wrote in message oups.com... The only hand-mixed cement question I have involves color. Is there an additive to get hand (bag or portland-sand-stone) mix to bleach out? The ready-mix always bleaches to a nice bright white. I used to do concrete work for a contractor, and I would often be the one stripping forms and wetting the setting concrete. I have never been able to duplicate the nice bleaching with a bag mix. |
#4
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Another Cement Mixing Question
A google search on "how to pour a concrete floor" yielded a few concrete
staining places/suppliers. I found one relevant ref so far. Haven't read it yet, but it apparently gives step by step instructions, and mebbe staining/bleaching advice. http://www.homesandcottages.com/trad...article_id=118 Someone told me the 'crete would eventually turn white, and indeed it's lightened up some, but the walls remain darker than the floor, altho the walls appears to be streaking. The floor is now an off-white, which is really not bad, but not the sand-white you see on sidewalks, etc. -- Mr. P.V.'d formerly Droll Troll wrote in message oups.com... The only hand-mixed cement question I have involves color. Is there an additive to get hand (bag or portland-sand-stone) mix to bleach out? The ready-mix always bleaches to a nice bright white. I used to do concrete work for a contractor, and I would often be the one stripping forms and wetting the setting concrete. I have never been able to duplicate the nice bleaching with a bag mix. |
#5
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Another Cement Mixing Question
Look at any parking lot or other mass concrete poured in sections
on different days. There will probably be one section that is snow white, or at least substantially more white than all the rest of the concrete. That section was rained on the same day it was poured. I cannot give you any science for the result, but I can sure show examples. This difference easily lasts 10 years or more, though it gets less noticeable with time as the oil stains and other discolorations take over. ______________________________ Keep the whole world singing . . . . DanG (remove the sevens) wrote in message oups.com... The only hand-mixed cement question I have involves color. Is there an additive to get hand (bag or portland-sand-stone) mix to bleach out? The ready-mix always bleaches to a nice bright white. I used to do concrete work for a contractor, and I would often be the one stripping forms and wetting the setting concrete. I have never been able to duplicate the nice bleaching with a bag mix. |
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