Preparation method of spraying concrete with early-stage high performance, high toughness and low rebound rate and matched stirring equipment

• Main Authors: YANG JUHUI, YANG ZHENXING, YIN LONG, CHEN QIAO, ZHOU YI, PAN YUE, FAN WENCHAO, JIANG NAN, LIU YONGSHENG, ZHAO TAIQING, ZENG CHUIGANG, YOU JINHU, XIE TAO, YANG TIANLI, ZHANG JICHAO, ZHANG LIMENG
• Format: Patent
• Language: Chinese; English
• Published: 27.02.2024
• Subjects: PERFORMING OPERATIONS; PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL,e.g. PLASTER; TRANSPORTING; WORKING CEMENT, CLAY, OR STONE

The invention relates to the construction field of a concrete spraying step in shield construction, in particular to a preparation method of concrete for spraying with early-stage high performance, high toughness and low rebound rate and matched stirring equipment. The problems that in the prior art, concrete is low in early strength, insufficient in toughness and high in rebound rate are solved. The steel fiber reinforced concrete comprises cement, steel fiber, a nanometer material, coarse and fine aggregate, a triisopropanolamine accelerator and water, the materials are prepared according to a certain ratio under a normal temperature condition, the matched stirring time is less than 5 minutes, and ventilation equipment is provided. The invention has the advantages that: by utilizing the characteristics of the triisopropanolamine accelerator, the application of the triisopropanolamine accelerator in the tunnel is realized, meanwhile, the defects caused by the use of the triisopropanolamine accelerator in the