Could natural cement without lime have been used as early as 1822?

-jc

On Mar 11, 2006, at 8:25 PM, edison wrote:

> Lime is generally unsuitable for immersion in any type of water for  
> several
> reasons. First, it is slightly soluble in water and will erode.  
> Second, it
> takes a long time to carbonate and cannot withstand immersion in an
> uncarbonated condition, nor can it carbonate in an immersed condition.
>
> Natural cement without lime was used in US coastal fortifications  
> after 1825
> in areas which were subject to immersion. In non-immersion  
> construction, some
> lime was added to natural cement to reduce cost. Presumably the  
> natural cement
> acts as a pozzolan in these mixtures.
>
> Michael P. Edison
> The Second American Natural Cement Conference
> www.naturalcement.org
>
>
> ---------- Original Message -----------
> From: [log in to unmask]
> To: [log in to unmask]
> Sent: Sat, 11 Mar 2006 13:17:45 EST
> Subject: [BP] Re Salt with lime
>
>> Better minds can respond to this query ,but lime mortar absorbs water
>> then  at a certain point sheds it , salts are crystals that "
>> bloom"with the wet dry process prior to Portland ,fort work was
>> "capped " with Natural Cement (see  conference with Mike Edison) this
>> according to documentation found in the Army  Corps of Engineers 1898
>> Why? because of its strength and ability to shed water
>>
>>
>>
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> ------- End of Original Message -------
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To terminate puerile preservation prattling among pals and the
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