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Flexural Behavior of 3D Printed concrete Beam with Fiber Reinforcement

Journal of Construction Research 2020年第2期2卷 30-41页

作者： Ghassan K Al-Chaar Andrij Kozych Structural Engineer at CERL United States US Army Construction Engineering corp United States

3D printing with concrete is a promising new method for rapid,low cost *** flexural strengths for reinforced/unreinforced and 3D printed/cast concrete Warren trusses were tabulated and the failure mechanisms were *** types of reinforcement used were rebar(basalt and steel),and mesh(basalt and aramid).The effect of loading geometry and loading speed was measured for basalt mesh and aramid mesh composite,*** to the expected variation in flexure between samples,it cannot be said whether small differences for various tests are *** stems from a microscopically uneven surface and random inhomogeneities in the bulk of the tested material which act as a microcrack catalyst and *** the tested beams are short specimens the numerical findings of other studies will vary based on the intended *** paper is intended to assess the performance of various reinforcements in a qualitative sense by comparing basalt reinforcement with other *** was found that cast beams tolerated deflection better but had a similar flexure strength compared as the printed *** steel and basalt rebar reinforced beams had the highest flexure strengths where the traditional steel rebar reinforcement outperformed the basalt in flexure by 36%and the basalt outperformed the steel in deflection by 40%.The basalt mesh outperformed the cast and printed unreinforced bars by a small margin but had only 25%of steel rebars’deflection at maximum flexure *** aramid mesh tolerated the biggest deflection out of any sample at 2.26 cm.

关键词： 3D printing Large scale Basalt rebar Aramid mesh Flexure strength concrete Warren truss

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