Experimental Study on the Material Performance and Mechanical Performance of Reactive Powder Concrete Beams

Author(s): Cao Xia, Tang Ting, Wang Huayang
Paper category: Proceedings
Book title: 1st International Conference on UHPC Materials and Structures
Editor(s): Caijun Shi and Dehui Wang
ISBN: 978-2-35158-164-3
e-ISBN: 978-2-35158-165-O
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 174-189
Total Pages: 16
Language: English

Abstract: In order to study the material properties and mechanical properties of RPC,a series of experiments were carried out in the project team.The effects of different ratio (different mineral fine admixture, fiber volume rate) on the mechanical property and durability of RPC were studied.The effects of different parameters (longitudinal reinforcement ratio, bar diameter,reinforcement strength grade) on flexural behavior of the component were studied.The effects of different parameters (shear span ratio, stirrup ratio and longitudinal
reinforcement ratio, steel fiber volume rate, cross section form, loading position)on shear strength of the component were studied.The results show that:the influence of admixture content on RPC strength is fly ash>silica fume>double mixing fly ash and quartz powder>silicon powder>quartz powder.And the sequence of the capacity of resistance to
chloride ion penetration is as follows:fly ash > quartz powder> silicon powder > double mixing fly ash and quartz powder.It suggests that the optimum dosage is 2% Steel fiber and 0.3% polypropylene fiber after the effects of fiber content on the durability and mechanical properties of RPC were comprehensive analyzed.The bending strength increased by 42.6% when the longitudinal reinforcement ratio increased from 3% to 6.7%.The bending strength of the beam with grade HRB500 is increased by 25% than that with grade HRB400.The crack width and the crack spacing can be controlled more effectively by using the smaller diameter steel bars.The shear strength of the test beams decreases with the increase of shear span ratio, and improves with the increase of stirrup ratio , longitudinal reinforcement ratio and steel fiber

Online publication: 2016
Publication type : full_text
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