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CRACK HEALING IN CEMENTITIOUS MATERIALS INCLUDING TESTS METHODS

Journal of Green Building 2020年第1期15卷 37-54页

作者： Alan Elliott Richardson brabha nagaratnam Kathryn Ann Coventry Dominic Brandy Leon Amess Engineering and Environment Northumbria UniversityUK School of Mathematics Department UEAUK

If concrete is crack free,deleterious substances can be avoided entering the body of the material,that may corrode the rebar or encourage freeze/thaw *** paper examines a self healing system of cementitious *** induced calcite precipitation was used to heal cracks in concrete with calcite using bacillus bacteria in alkaline conditions to generate a calcite filling *** healing of cracked prisms was determined using a water flow and absorption test and the results were expressed to record the healing as a *** findings of the tests showed that a significant degree of self healing had taken place after 56 days after inducing a crack to the concrete prisms and the water flow test was appropriate to determine the degree of self healing taking *** of this process are such that the process requires a biological laboratory to create the spore impregnated *** the aggregate is prepared,the batching process is essentially the same as any normal concrete.A practical use of this system could be developed using cover panels of self healing material to act as permanent formwork,thus placing the healing ingredients where they are needed at a minimum *** system has huge potential for the creation of a self repairing sustainable infrastructure.

关键词： Alkaphillic bacteria concrete sustainability strength water flow water absorption calcite

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