[Greenbuilding] Carbon-negative concrete?

[John Daglish]

Some cement alternatives


EMC cement - portland cement OPC  finely interground with sand or
other pouzzoulanes
more surface area for chemical reaction ...less OPC
http://www.emccement.com/landing4a.htm

Zeobond geopolymer cement using flyash  - aluminium silicate
http://www.zeobond.com/geopolymer-solution.html

EcoCem  - geopolymer cement using flyash - GGBS (ground granulated
blastfurnace slag) - aluminium silicate
http://www.ecocem.ie/

Geopolymers - a history  aluminium silicate eg flyash or naturally
occuring kaolinite
www.geopolymer.org/fichiers_pdf/30YearsGEOP.pdf

Tececo magnesium cement
http://www.tececo.com/technical.reactive_magnesia.php

Natural cement - a natural lime with trace elements similar to cement
Cement Prompt
http://www.vicat.fr/en/Activities/Cement/Prompt-natural-cement

quite often a high strength cement is not needed
eg 2 to 3 storey buildings (or taller) can be easily built with
unfired clay   eg adobe, pisé, cob
eg a low strength substrate should in general have a low strength
mortar or render (plaster) which natural hydraulic or non-hydraulic
limes provide.
eg London Stock bricks - a low strength high sand brick are layed with
lime mortar which has similar rates of movement to the brick.

Regards

John Daglish
Paris, France
John Daglish
Paris, France


2015-11-29 22:41 GMT+01:00 Nick Pine <nick_pine at verizon.net>:
> http://home.howstuffworks.com/home-improvement/construction/materials/carbon-negative-cement.htm
>
> Nick
>
>
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