Bonding Performance Study Of Inorganic Chemistry Bonder Rebar On Concrete Structure

Chemically bonder rebar is a technology which is according to needed steel bars usechemical glue to make new steel bars and original concrete to be bonded firm, with the properdrilling aperture and depth,and make the new steel bars (usually called planting-bar) play theexpectations of design performance. Tension role in the bonder rebar deliver to concrete bychemical glue. The technology of chemically bonder rebar is simple, convenientoperation， safe and reliable, so it is widely used in structure strengthening, reinforcement, theold and new structure connections, fill steel bars and fill steel components. At present, theexisting researches are more about organic chemistry bonder rebar, but in the practicalapplication, inorganic chemistry bonder rebar technology is more cheap, convenient and widelyapplied than organic chemistry bonder rebar technology.Through the test, this paper analyzes the bond-destruction mechanism of bonderrebars-inorganic material anchor glue-concrete. Get six failure characters of inorganicchemistry bonder rebar. Through ANSYS analyzes and others conclusion, we get tensioncalculation formulas of six failure characters. Study five factors those effect tensile capacity.Analyzes grouped anchorage effect of inorganic chemistry bonder rebar. Sum up theconstruction points of inorganic chemistry bonder rebar.The binding power of inorganic chemistry bonder rebar is mainly supplied by the bindingpower between steel bars and glue and the binding power between glue and concrete. The sixfailure characters of inorganic chemistry bonder rebar are failure between anchor bars and glue,failure between glue and concrete, concrete cone failure, concrete cone failure+pull out anchorbar(don’t have glue), concrete cone failure+pull out anchor bar(have glue) and anchor barsfailure.Through the ANSYS analysis we know that shear stress is different in anchorage depth,but the shear stress is larger when near the concrete surface, the shear stress fell rapidly whenfarm from the concrete surface. In the same anchorage depth, the greater distance from theanchor bar the smaller value of shear stress, from50mm of anchor bar the shear stress is20%-30%of glue place, from100mm of anchor bar the shear stress is5%-10%of glue place.Glue tape, anchorage depth, thickness of inorganic glue, mechanical anchoring and other measures have influence on shear stress.Through six groups pull out test about inorganic chemistry bonder rebar we get influencefactors of tensile capacity. The tensile capacity of inorganic chemistry bonder rebar increasewith concrete strength. The tensile capacity of inorganic chemistry bonder rebar increase withthe diameter of anchor bar, but when diameter is more than12mm the tensile capacity changelittle. The tensile capacity of inorganic chemistry bonder rebar increase with the anchoragedepth. The tensile capacity of inorganic chemistry bonder rebar increase with the increase of thedrilling aperture, but not very obvious. The tensile capacity of inorganic chemistry bonder rebarwhich is heated by high temperature is not lower than normal temperature. The tensile capacityof inorganic chemistry bonder rebar which is planted in reinforced concrete is greater thanplanted in plain concrete.Through grouped anchorage pull out test about inorganic chemistry bonder rebar we knowthat the tensile capacity of grouped anchorage is0.8times of single anchorage.At last, this paper sum up the construction points of inorganic chemistry bonder rebar, andgive suggest to further study of Inorganic chemistry bonder rebar.