CRACK HEALING UTILISING BACTERIAL SPORES IN CONCRETE  

作　　者：Alan Richardson Leon Amess Simon Neville Christopher Walton 

机构地区：[1]Northumbria University,510 Wynne Jones,New Castle upon Tyne,NE18SA United Kingdom

出　　处：《Journal of Green Building》2017年第3期103-114,共12页绿色建筑学报（英文）

摘　　要：This self repair system is based upon harmless ground borne bacteria as the self-healing agent.The bacteria are activated after the concrete is cracked and the bacterial spores are exposed to moisture and air.The bacterial reproduction process creates a calcite by-product which fills the cracks in the concrete.By 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 costs.The concrete/mortar prisms were cracked and tested for water flow.They were then left for 56 days to heal and were subject to a test for water tightness.Healing 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 agent.The 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 

分 类 号：TU5[建筑科学—建筑技术科学]