High-rise building design is based on the seismic design principle of "strong columns and weak beams, strong shears and weak bends, strong nodes, and strong anchors". The concrete grade of column walls is often 2-4 grades higher than that of beam concrete. In order to ensure that the concrete strength in the core area of the node is the same as the concrete strength of the column wall, the concrete joint must be set on the beam. The beam height of the upper part of the joint is 1 times the column edge and is ≥500mm, and the junction surface is at a 45-degree angle to the bottom of the beam. For the construction of this joint site, wire mesh or quick-easy closing mesh is usually used as isolation materials, but the joint position and joint angle are difficult to control. The main reason for this phenomenon is that the steel wire mesh or fast-lifting mesh cannot be subjected to stress alone, and it often needs to be folded multiple layers to be effective. During the process of vibrating the concrete, the concrete easily breaks through the barrier layer, forming columns. High-grade concrete flows naturally, while low-grade concrete is mixed into the core area or even the columns, destroying the concrete composition of the core area and failing to meet the node form required by the design.
For this reason, Zhongtian Liujian invented a barrier for concrete pouring of beam and column joints different models. uses a barrier temporary barrier to effectively ensure the joint position and joint angle, and can be reused, reducing the cost of investment in barrier materials such as wire mesh and is convenient to construct. It is a simple, easy-to-learn, convenient and practical construction method.
Barrier for different types of concrete pouring
barrier structure diagram
Process features:
- Convenient construction
- The structure of the barrier is relatively simple, and it only needs to be processed and produced on-site. The barrier construction method is simple, easy to understand and operate, and consumes very little labor, which is easy to promote and use on-site.
- joint molding effect is good
- through effective barriers, and can form joints completely in accordance with the requirements of the drawings, ensuring the joint angle and joint position, avoiding the waste caused by the free flow of high-strength concrete, and avoiding the incorporation of low-strength concrete into the core area to destroy the core area structure composition.
- Green and environmentally friendly
- adopts barrier construction to abandon the barrier of steel wire mesh or fast-floating net, reducing material losses caused by the barrier of processing steel wire mesh or fast-floating net. The barrier is reused and can eventually be used as steel to secondary structures or for temporary construction, with high material recycling rate.
- Cost saving
- Compared with steel wire mesh and fast-floating net, barriers are a temporary barrier measure and can be reused, while steel wire mesh and fast-floating net are permanently poured into concrete, with a large investment.
Process flow:
barrier design and cutting → barrier production → positioning steel bar installation → barrier installation → wall column high-strength concrete pouring → beam slab low-strength concrete pouring → barrier pull out → re-vibration → finish
- blocker on-site installation diagram
