公开(公告)号：US20190194072A1

公开(公告)日：2019-06-27

申请号：US16311862

申请日：2017-06-02

Applicant: HOLCIM TECHNOLOGY LTD

Inventor： Vivien ESNAULT ,  Pierre-Henri JEZEQUEL ,  Fabrice TOUSSAINT ,  Abdellaziz LABYAD

IPC: C04B28/02 ,  B33Y10/00 ,  B33Y70/00 ,  E04G21/04 ,  C04B24/32 ,  C04B24/38 ,  C04B24/26 ,  C04B24/34 ,  C04B22/12 ,  C04B22/06 ,  C04B22/14 ,  C04B14/04 ,  C04B22/08 ,  C04B24/16

CPC classification number: C04B28/02 ,  B28B1/001 ,  B28B3/20 ,  B29C64/106 ,  B33Y10/00 ,  B33Y70/00 ,  C04B14/045 ,  C04B22/06 ,  C04B22/085 ,  C04B22/124 ,  C04B22/148 ,  C04B24/16 ,  C04B24/2652 ,  C04B24/32 ,  C04B24/34 ,  C04B24/38 ,  C04B24/383 ,  C04B40/0028 ,  C04B2103/0079 ,  C04B2103/12 ,  C04B2103/302 ,  C04B2103/32 ,  C04B2103/44 ,  C04B2111/00181 ,  E04G21/04 ,  C04B14/062 ,  C04B14/28 ,  C04B12/04 ,  C04B14/303 ,  C04B22/14 ,  C04B22/147 ,  C04B24/14

Abstract: A method of placing a flowable construction material including a hydraulic binder for building structural components layer-by-layer, such as for 3D concrete printing, the method including preparing a fresh flowable construction material made of Portland cement, fine limestone filler materials, fine sands, water, and water reducing admixture and possibly a set or hardening accelerating admixture, conveying the flowable construction material to a deposition head, placing the construction material through an outlet of the deposition head in order to form a layer of construction material, before placing the construction material, adding a rheology-modifying agent to the construction material so that the placed material has an increased yield stress when compared to the material during the conveying step.