Seeing the various additives used for special application mortars over the past 1900 years, makes me appreciate the modern era's ability to synthesize.

Table 8: The effect of natural organic additives on lime-based mortars (4; 9; 5; 35)

Type of additive Natural compound

Increasing strength - Sugar, molasses, fats, fruit juices, rye dough, rice starch, gluten,
curdled milk, egg white, vegetable gums, casein, cheese, blood

Setting time accelerators -Egg white, bullock´s blood, sugar, hog´s lard, casein, starch

Setting time reducers = Sugar, fruit juices, gluten, bullock´s blood, egg white, molasses

Plasticizers - Milk, egg white, fats, sugar, rosin, dung, starch

Aerating agents - Urine, malt, beer

Waterproofing agents and sealants -Fats, oils, waxes, asphalt, sugar materials

Reinforcing fibrous materials -Animal hair, hen, straw, sea-weeds, elm bark, fibrous plants,
cotton, rice paste, barley

Views: 179

Comment by Nathan Giffin Vertical Artisans on January 8, 2014 at 4:27pm

I love it … nice post Jeff!

Comment by Brent Horton on October 3, 2014 at 5:08pm


Comment by Andre Tyrrell on January 8, 2015 at 1:53am

Nice post  eggs, sugar and urine eh             Now    ill have a few more options next time im rendering and run out of waterproofer,plasticiser or accellerant.


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