EFFECTS OF SURFACE BIO-DEPOSITION ON SORPTION OF HIGH PERFORMANCE FIBER-REINFORCED CEMENTITIOUS COMPOSITES
Abstract eng: This paper reports the effect of bacterial calcium carbonate precipitation on sorption of engineered cementitious composites (ECC), a high performance fiber-reinforced cementitious composites featuring high tensile ductility of 3-5%. Water sorptivity and absorption tests were conducted on untreated and treated ECC specimens with different fiber content, i.e. 0%, 2%, and 4% by volume. Results showed that the inclusion of fibers lead to higher water sorptivity and absorption, probably due to smaller crack widths, higher porosity and better pore connectivity. It was concluded that surface treatment through bacterial deposition of calcium carbonates can effectively reduce water sorptivity and absorption of ECC.
Contributors:
Publisher:
Japan Concrete Institute, Tokyo
Conference Title:
Conference Title:
First International Conference on Concrete Sustainability
Conference Venue:
Tokyo (JP)
Conference Dates:
2013-05-27 / 2013-05-29
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.
Record appears in:
Record created 2014-10-29, last modified 2014-11-18
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