Study on the rheological property and printability of 3D printed concrete with low cement content
3D printed concrete(3DPC)has made breakthroughs in its mix design,perform-ance test and evaluation and actual printing test,but the excessively large use of cement is a common problem at present.In this study,admixtures that are commonly used in Qingdao area are selected to substitute cement,with the substitute rates being set at 40%and 50%.Taking water-binder ratio and cement-sand ratio into consideration,6 kinds of 3DPCs are de-signed with different mix proportions to conduct tests of their flowability,rheological prop-erty and printability respectively.The printability changes influenced by the flowability and rheological property are drawn and the rheological parameter interval suitable for printing is given.The results show that when the juniping table expansion is between 160-180 mm,the static yield stress is(2300±200)Pa and the dynamic yield stress is(310±30)Pa,the de-signed 3DPC has better printability.
3D printed concrete(3DPC)flowabilityrheological propertyprintability
NETL
NSTL
万方数据
维普
