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CRACK HEALING UTILISING BACTERIAL SPORES IN CONCRETE

Journal of Green Building 2017年第3期12卷 103-114页

作者： Alan Richardson Leon Amess Simon neville Christopher Walton Northumbria University 510 Wynne JonesNew Castle upon TyneNE18SA United Kingdom

This self repair system is based upon harmless ground borne bacteria as the self-healing *** bacteria are activated after the concrete is cracked and the bacterial spores are exposed to moisture and *** bacterial reproduction process creates a calcite by-product which fills the cracks in the *** sealing the cracks in concrete,an effective barrier to air or liquid borne deleterious materials are formed and as a consequence of this,enhanced durability is achieved in the structure,result-ing in lower life cycle *** concrete/mortar prisms were cracked and tested for water *** were then left for 56 days to heal and were subject to a test for water *** was observed and a reduced water flow(74%and 32%healed)measured with the healed samples when compared to the specimens that were cracked and subjected to a water flow test without any healing *** number of samples were limited and a larger scale test is recommended for further work;however,this is a proof of concept of the process of healing and testing.

关键词： self-healing bio-based mortar micro-cracking light weight aggregates liquid-tightness

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