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、由于鋼筋銹蝕，構件的耐久性破壞；

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

2、GRC構件螺絲孔邊加強不標準，容易脫落；

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

3、錨固在主體結構的頂爆螺絲的長度沒有統一的規定和做法；

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

4、沒有頂爆螺絲的防銹措施；

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

5、采用鋼筋焊接方式連接的焊接口沒有可靠的防銹措施。

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

GRC構件脫落問題方法

Solution to the problem of GRC component falling off

1、GRC構件與主體連接采取防銹措施。膨脹螺絲應采用不銹鋼膨脹螺絲，采用焊接連接，焊口部位要涂刷防銹漆。

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、加強預留螺絲孔洞邊沿。對GRC構件螺絲孔邊加受力包，在沉栓孔位置加厚2~2.5cm，厚度以30°角向四周擴散，受力包處多加一層玻璃纖維網格布。

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、統一規定錨固長度。對錨固在主體結構的頂爆螺絲的長度進行設計計算，確保性。

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、斗拱混凝土澆筑連接。斗拱和主體模板同時安裝，斗拱鋼筋與主體鋼筋交織一起，在主體混凝土澆筑時一同注滿成整體（可參照四會棕櫚城）。斗拱上懸掛鋼筋另外設計。

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、窗臺邊檐飾線、斗拱的特別制作。

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

1：在條件允許的情況下，部分邊檐、花缽底座邊檐飾線可以采用PVC管作側模，使致與頂面連成整體，避免不同材料之間的裂縫（可參照四會棕櫚城）。

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：在條件允許的情況下，建議做一批斗拱模板（可以采用玻璃鋼）直接與主體模板一起安裝，主體澆筑。測算其在經濟上、施工難度、施工進度、質量控制等方面的可行性，確立其推廣價值。

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.