GRC构件具有高强度、高韧性、耐水．耐火．轻质等优势，可应用于墙板、吊顶板、屋面板，性模板及外装饰构件等，既能缩短施工时间又节约材料。那么
济南GRC构件锈蚀问题的方法你知道吗？
GRC components have the advantages of high strength, high toughness, water resistance, fire resistance, and lightweight, and can be applied to wall panels, ceiling panels, roof panels, permanent formwork, and exterior decorative components, which can shorten construction time and save materials. Do you know the solution to the corrosion problem of GRC components in Jinan?
a)GRC构件钢筋、预埋件采取阻锈措施。水泥水化的高碱度（pH＞12.5），使钢筋表面形成纯化膜，是构件中保护钢筋的主要依据与基本条件，当构件中的pH值＜12时，钢筋的钝化膜就不稳定，当pH值＜11.5时，钢筋的钝化保护膜就遭破坏，钢筋的锈蚀便开始进行。
a) Rust prevention measures shall be taken for the reinforcement and embedded parts of GRC components. The high alkalinity of cement hydration (pH>12.5), which forms a purification film on the surface of the steel bar, is the main basis and basic condition for protecting the steel bar in components. When the pH value in the component is less than 12, the passivation film of the steel bar is unstable, and when the pH value is less than 11.5, the passivation protection film of the steel bar is damaged, and the corrosion of the steel bar begins.
由于GRC构件普遍采用快硬硫铝酸盐水泥，属低碱度水泥，根据JC/T940-2004《玻璃增强水泥（GRC）装饰品》、GB20472-2006《硫铝酸盐水泥》规范要求，钢筋应采用不锈钢丝或镀锌钢丝、预埋件应采用不锈钢板或镀锌钢板等，有条件的话可使用环氧涂层钢筋。
Due to the widespread use of fast hardening sulphoaluminate cement as a low alkalinity cement for GRC components, according to the requirements of JC/T940-2004 Glass Reinforced Cement (GRC) Decorations and GB20472-2006 Sulphoaluminate Cement, stainless steel wire or galvanized steel wire should be used for reinforcement, stainless steel plate or galvanized steel plate should be used for embedded parts, and epoxy coated reinforcement can be used if conditions permit.
b)减少GRC构件中氯离子含量。构件中氯离子含量对钢筋锈蚀影响大，过量的氯离子会破坏钢筋表面的钝化膜，从而导致钢筋锈蚀。在GRC材料把关上，严禁使用海砂，应定期检测砂子中氯离子含量，严禁使用氯离子含量超标的工业废水拌合砂浆。
b) Reduce the chloride ion content in GRC components. The content of chloride ions in components has a significant impact on reinforcement corrosion. Excessive chloride ions can damage the passivation film on the surface of the reinforcement, leading to reinforcement corrosion. In the control of GRC materials, it is strictly prohibited to use sea sand, and the chloride ion content in the sand should be regularly tested. It is strictly prohibited to use industrial wastewater with excessive chloride ion content to mix mortar.
c)可添加外加剂丙烯酸酯共聚乳液（丙乳）。丙乳是一种高分子聚合物的水分散体，是一种水泥改性剂，能提高GRC构件的抗裂、防水、防氯离子渗透、耐磨、耐老化等性能。
c) The additive acrylate copolymerization lotion (acrylic emulsion) can be added. Acrylic emulsion is an aqueous dispersion of high molecular polymers and a cement modifier that can improve the cracking resistance, water resistance, chloride ion penetration resistance, wear resistance, and aging resistance of GRC components.
d)增强GRC构件密实度、完好性及保护层厚度。GRC构件的密实度和完好性是指构件是否有开裂、无蜂窝空洞、缺棱掉角、露筋等情况，促使钢筋生锈的关键因素还在于大气中的氧渗入钢筋表面的能力。
d) Strengthen the compactness, integrity, and protective layer thickness of GRC components. The compactness and integrity of GRC components refer to whether the components have cracks, no honeycombs, voids, missing edges, missing corners, and exposed reinforcement. The key factor that promotes reinforcement rust also lies in the ability of oxygen in the atmosphere to penetrate the surface of the reinforcement.
如果构件密实、完好、保护层厚度能得到保证，就能有效地阻止水和氧气进入，GRC构件制作时应采用低水灰比，提高构件密实度，制作过程中严格控制预埋钢筋的直径、放置位置，严格检查垫块放置情况，有效保证构件保护层厚度。
If the component is dense, intact, and the thickness of the protective layer can be guaranteed, it can effectively prevent the entry of water and oxygen. During the production of GRC components, a low water cement ratio should be used to improve the compactness of the component. During the production process, the diameter and placement position of the embedded reinforcement should be strictly controlled, and the placement of cushion blocks should be strictly checked to effectively ensure the thickness of the protective layer of the component.
e)GRC构件外涂隔离层。这种方法能够提高构件的防水性和耐久性，隔离腐蚀环境可延缓碳化速度，起到保护构件的作用，施工时，先要构件附着物，用水冲洗后令其充分干燥，在构件外表涂抹砂浆或绝缘层，如沥青漆、环氧树脂涂料或油漆进行防腐。
e) The GRC components are externally coated with an isolation layer. This method can improve the waterproof and durability of components, isolate the corrosive environment, delay the carbonization speed, and play a role in protecting the components. During construction, it is necessary to first remove the attachments to the components, wash them with water, and then fully dry them. Apply mortar or insulating layer, such as asphalt paint, epoxy resin coating, or paint, to the exterior of the components for corrosion prevention.
The solutions to the corrosion problem of GRC components have been explained from the above aspects, hoping to help you. If you have any doubts or needs about this product, please feel free to visit our website at any time http://www.aswjc.com Contact for message consultation!
