Engineered self-cleaning cementitious composites
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United States of America Patent
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Jan 5, 2021
Grant Date -
Nov 23, 2017
app pub date -
Nov 3, 2015
filing date -
Nov 3, 2014
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Abstract
The present invention relates to a cementitous composite specifically engineered to possess self-cleaning abilities while maintaining their unique strain-hardening behaviour and the preparation of the said composite. The cementitious composite comprises a hydraulic cement, a plurality of fibers, in particular polyvinyl alcohol fibers wherein the ratio of the plurality of fibers to the hydraulic cement is in a range from 1 to 3% by volume; a self-cleaning agent, in particular nanoparticulate titanium dioxide (TiO2) wherein the weight ratio of the self-cleaning agent to the hydraulic cement is in a range from 0.01 to 1.
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