Which reinforced material is the best, which is of high quality, which is the cheapest? Guangdong Shijia Goujian Building Materials Technology Co., Ltd., professional manufacturer of reinforced materials.
High-strength polymer mortar is a new type of concrete repair mortar that combines the adhesive properties of high polymer materials with the durability of inorganic materials; it boasts high compressive strength, rapid curing, and excellent bonding performance; it has excellent water retention and crack resistance, high alkaline resistance, and UV resistance; it is easy to handle, can be applied on damp substrates, and is environmentally friendly and healthy. It simplifies and facilitates the construction process, matches the durability with concrete, shortens the construction period, and ensures cost-effectiveness.
I. Application Scope
Suitable for concrete structure repairs in industrial, municipal, bridge, and residential construction.
II. Categories
Concrete structural repair polymer modified materials are divided into single-component and double-component.
Single-component: "Composed of cement, fine aggregate, polymer dry powder, and additives."
Two-component: Composed of powdered materials including cement, fine aggregates, polymer emulsion, and additives.
Three performance indicators
High-strength polymer mortar is divided into three categories.
Structural Repair-Specific: Designed for repairing concrete structures with compressive strength grades below C60.
Steel strand-specific: Suitable for wire rope mesh reinforcement with polymer mortar overlay method.
High-speed Rail Specific: Suitable for repairing concrete structures of prestressed beams and track slabs for high-speed rail, especially for grades C50 and above.
Serial Number | Project | Technical Specifications | |||
Structural Repair-Specific | Steel wire rope for special use | High-Speed Train Exclusive | |||
1 | Appearance | Powder is uniform with no lumps. Liquid is well-mixed and free of sediment. | |||
2 | Viscosity mm | 50-80 | |||
3 | Setting Time | Initial Set | ≥45 | ≥45 | ≥45 |
Final Condensation | ≤24 | ≤24 | —— | ||
4 | Compressive Strength MPa | 7d | ≥20.0 | ≥30.0 | 8h≥25.0 |
28d | ≥60.0 | ≥60.0 | ≥60.0 | ||
5 | Flexural strength MPa | 7d | ≥8 | ≥6 | 24h≥10 |
28d | ≥12 | ≥10 | —— | ||
6 | Bond strength MPa | 28d | ≥2.5 | ≥2.5 | ≥2.5 |
7 | Shrinkage rate % | 28d | ≤0.1 | ≤0.1 | ≤0.1 |
*Note 1: For materials requiring rapid setting and early strength, the setting time shall be determined by both the supplier and the buyer. *Note 2: The tensile bond strength of the mortar body, if not meeting the requirements of Table 1's 6, can be used in conjunction with an interface agent. *Note 3: For requirements with durability indicators, refer to the GB/T 50476 Code for Durability Design of Concrete Structures. | |||||
I. Application
The reinforcement method using stainless steel wire mesh is suitable for reinforcing all structures prone to bending. Particularly applicable to the representative bending structures of civil engineering buildings, such as the flat beams on reinforced concrete bridge decks, as well as the central parts of bridge piers and the main tower axes, and road cracking areas. It shares the same system as previous reinforced concrete structures. The fundamental principle of this reinforcement method is that the stainless steel wire mesh is attached to the original concrete through excellent adhesion and bending strength of the permeable polymer mortar. This enhances rigidity, improves load-bearing capacity, and prevents durability reduction caused by the polymer mortar.
2. When concrete exhibits honeycomb, voids, cracks, or damaged protective layer with exposed reinforcement, it can be repaired and reinforced with polymer mortar patches; thickening the protective layer, leveling uneven surfaces, and repairing old concrete surfaces; enhancing the durability of concrete and extending its lifespan; offering excellent impermeability, crack resistance, aging resistance, and alkali resistance; and providing good adhesion to various materials.
II. Usage
1. Surface requirements and treatment: The base surface should be smooth, rough, clean, and free of oil stains and floating dust. There should be no sanding, hollowing, or cracking. Prior to construction, the surface should be washed with high-pressure water and kept moist, but without any water accumulation. A primer can be applied before bonding.
2. Material Preparation: Weigh and place the powder and water in a 100:13 mass ratio. Pour 90% of the actual water quantity into the powder and mix thoroughly. Gradually add the remaining 10% water while stirring to ensure no lumps form. The mixed slurry should be used up within 0.5-1 hour.
3. Application: First, evenly apply an interface treatment agent (ratio of A:B = 3:1) to the wet concrete base surface. Do not apply polymer mortar over a large area at once; instead, divide and stagger the application in strips and blocks, with each section not exceeding 10 square meters. The interval between staggered applications should be at least 24 hours. When applying in layers, stagger the joint positions.
4. After polymer mortar is spread, it should be pressed and leveled in one go, avoiding repeated pressing. In case of bubbles, they should be pierced and compacted, ensuring a dense surface. When the layer thickness on the face or ceiling exceeds 10mm, it should be constructed in layers. The thickness of each layer should be 5-10mm, and the next layer can be applied only after the previous one is touch-dry.
