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                    GRC構件銹蝕問題的解決方法

                    來源:http://www.toy-go.com/ 發布人:aisaiwen 發布時間:2023-03-18

                    GRC構件具有高強度、高韌性、耐水.耐火.輕質等優勢,可應用于墻板、吊頂板、屋面板,永久性模板及外裝飾構件等,既能縮短施工時間又節約材料。那么濟南GRC構件銹蝕問題的解決方法你知道嗎?
                    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構件鋼筋、預埋件采取阻銹措施。水泥水化的高堿度(pH>12.5),使鋼筋表面形成純化膜,是構件中保護鋼筋的主要依據與基本條件,當構件中的pH值<12時,鋼筋的鈍化膜就不穩定,當pH值<11.5時,鋼筋的鈍化保護膜就遭破壞,鋼筋的銹蝕便開始進行。
                    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構件普遍采用快硬硫鋁酸鹽水泥,屬低堿度水泥,根據JC/T940-2004《玻璃增強水泥(GRC)裝飾品》、GB20472-2006《硫鋁酸鹽水泥》規范要求,鋼筋應采用不銹鋼絲或鍍鋅鋼絲、預埋件應采用不銹鋼板或鍍鋅鋼板等,有條件的話可使用環氧涂層鋼筋。
                    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.
                    濟南GRC構件
                    b)減少GRC構件中氯離子含量。構件中氯離子含量對鋼筋銹蝕影響大,過量的氯離子會破壞鋼筋表面的鈍化膜,從而導致鋼筋銹蝕。在GRC材料把關上,嚴禁使用海砂,應定期檢測砂子中氯離子含量,嚴禁使用氯離子含量超標的工業廢水拌合砂漿。
                    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)可添加外加劑丙烯酸酯共聚乳液(丙乳)。丙乳是一種高分子聚合物的水分散體,是一種水泥改性劑,能提高GRC構件的抗裂、防水、防氯離子滲透、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)增強GRC構件密實度、完好性及保護層厚度。GRC構件的密實度和完好性是指構件是否有開裂、無蜂窩空洞、缺棱掉角、露筋等情況,促使鋼筋生銹的關鍵因素還在于大氣中的氧滲入鋼筋表面的能力。
                    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.
                    如果構件密實、完好、保護層厚度能得到保證,就能有效地阻止水和氧氣進入,GRC構件制作時應采用低水灰比,提高構件密實度,制作過程中嚴格控制預埋鋼筋的直徑、放置位置,嚴格檢查墊塊放置情況,有效保證構件保護層厚度。
                    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構件外涂隔離層。這種方法能夠提高構件的防水性和耐久性,隔離腐蝕環境可延緩碳化速度,起到保護構件的作用,施工時,先要清除構件附著物,用水沖洗后令其充分干燥,在構件外表涂抹砂漿或絕緣層,如瀝青漆、環氧樹脂涂料或油漆進行防腐。
                    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.
                    GRC構件銹蝕問題的解決方法就從以上幾個方面做出了講解,希望能夠幫助到您,您對此產品有何疑惑或者需求,都能隨時來我們網站http://www.toy-go.com進行留言咨詢聯系!
                    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.toy-go.com Contact for message consultation!
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