I know and we have determined that compressive strength probably isn't
the best way to measure PC although it does give a basis to start.
On 10/21/09, Spaceman <Spaceman@starship-enterprises.net> wrote:
>
>
> Those standards are for concrete. Papercrete is not concrete.
>
> rmorger03 wrote:
>>
>> Industry standard is a seven day preliminary break and a twenty eight day
>> break. Some jobs do additional breaks at 54 days or 90 days depending on
>> original mix design.
>> I would have expected higher compressive strengths also.
>>
>> --- In papercreters@yahoogroups.com, Jim Elbrecht <elbrecht@...> wrote:
>>
>>>
>>> Both good reading. PC is *way* softer than I expected. Softer
>>> than most woods used in construction. 260psi is softer than
>>> basswood. [and concrete used in footings is abt 5000psi, if I recall
>>> correctly]
>>>
>>> They don't say on that page how long they cured the samples. [or am I
>>> missing that?] 1 week, 1 month, and 1 year samples would be
>>> interesting.
>>>
>>> Jim
>>>
>>>
>>
>>
>>
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>
>
--
Robert Morger
Central Texas
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