GRC components are widely used in the construction industry, but due to some problems such as the production process can not reach the standard and the construction is not standardized, the GRC components began to crack and fall soon after installation, resulting in engineering quality problems. Then how to prevent and solve these problems?

1、由于钢筋锈蚀，构件的耐久性破坏；

1. Due to the corrosion of reinforcement, the durability of the component is destroyed;

2、GRC构件螺丝孔边加强不标准，容易脱落；

2. GRC component screw hole edge reinforcement is not standard, easy to fall off;

3、锚固在主体结构的顶爆螺丝的长度没有统一的规定和做法；

3. There is no uniform regulation and Practice for the length of the top explosive bolt anchored in the main structure;

4、没有顶爆螺丝的防锈措施；

4. There is no anti rust measures for top explosion screws;

5、采用钢筋焊接方式连接的焊接口没有可靠的防锈措施。

5. There is no reliable anti rust measures for the welding joint connected by steel bar welding.
 

GRC构件脱落问题方法

Solution to the problem of GRC component falling off

1、GRC构件与主体连接采取防锈措施。膨胀螺丝应采用不锈钢膨胀螺丝，采用焊接连接，焊口部位要涂刷防锈漆。

1. Anti rust measures shall be taken for the connection between GRC components and main body. Stainless steel expansion screw shall be used for expansion screw, and welding joint shall be painted with antirust paint.

2、加强预留螺丝孔洞边沿。对GRC构件螺丝孔边加受力包，在沉栓孔位置加厚2~2.5cm，厚度以30°角向四周扩散，受力包处多加一层玻璃纤维网格布。

2. Strengthen the edge of reserved screw hole. A load-bearing package is added to the screw hole of GRC member, and the thickness is 2-2.5cm at the countersunk hole, and the thickness is diffused around at an angle of 30 ° and an additional layer of glass fiber mesh cloth is added at the stress package.

3、统一规定锚固长度。对锚固在主体结构的顶爆螺丝的长度进行设计计算，确保性。

3. The anchorage length shall be specified uniformly. The length of the top explosive screw anchored in the main structure is designed and calculated to ensure the safety.

4、斗拱混凝土浇筑连接。斗拱和主体模板同时安装，斗拱钢筋与主体钢筋交织一起，在主体混凝土浇筑时一同注满成整体（可参照四会棕榈城）。斗拱上悬挂钢筋另外设计。

4. Concrete pouring connection of bucket arch. The bucket arch and the main body formwork are installed at the same time, and the reinforcement of the bucket arch and the main body are interwoven together, and filled into a whole when the main body concrete is poured (refer to Sihui palm city). The hanging reinforcement on the bucket arch is designed separately.

5、窗台边檐饰线、斗拱的特别制作。

5. Special fabrication of window sill eaves decoration line and bucket arch.

1：在条件允许的情况下，部分边檐、花钵底座边檐饰线可以采用PVC管作侧模，使致与顶面连成整体，避免不同材料之间的裂缝（可参照四会棕榈城）。

1: If conditions permit, PVC pipes can be used as side molds for part of the eaves and decorative lines of the base of flowerpots, so as to connect them with the top surface as a whole and avoid cracks between different materials (refer to Sihui palm city).

2：在条件允许的情况下，建议做一批斗拱模板（可以采用玻璃钢）直接与主体模板一起安装，主体浇筑。测算其在经济上、施工难度、施工进度、质量控制等方面的可行性，确立其推广价值。

2: If conditions permit, it is recommended to make a batch of bucket arch formwork (glass fiber reinforced plastic can be used) to install directly with the main formwork and pour the main body. The feasibility of economic, construction difficulty, construction progress, quality control and other aspects is calculated, and its popularization value is established.