Due to its high coefficient of thermal expansion, steel plates are prone to deformation and have a smooth surface. Cement based materials are not easily infiltrated into them, and the surface of wet applied steel plates is prone to hollowing and peeling. So when wet pasting stone on steel plates, it is necessary to first perform interface treatment and fill the joints with flexible sealant. So, what are the other operating points and precautions?
● Method characteristics
1. Surface interface treatment of steel plates;
2. Flexible adhesive bonding;
3. Leave appropriate gaps and fill them flexibly.
● Applicable scope
Paste natural stone on metal plate walls such as steel plates.
● Process principle
Waterproofing, enhancing and reducing stress. Perform interface treatment on the surface of the steel plate to improve the adhesion with the adhesive.
Many problems such as water spots, alkalinity, peeling, and cracking are related to water; Waterproofing refers to the proper waterproofing of the back of the stone and the protection of other surfaces.
Many issues such as peeling, cracking, and detachment are related to strength, and reinforcement is not only a material enhancement, but also a systematic enhancement. The enhancement of materials is aimed at improving the physical and mechanical properties of stone, making it less prone to cracking; The enhancement of the system is aimed at the system, from the base layer to the surface layer, the entire system is stable, and the stone does not crack, peel, or fall off.
03. Reduce stress
Problems such as peeling, cracking, and detachment are all caused by the disruption of the balance between strength and stress. Reducing stress is an important measure to resolve conflicts. Enhancing and reducing stress have a certain correlation and mutual influence. Many lesions occur under the combined action of two factors. Mastering the two elements well, achieving high strength and low stress, and operating the system in a low stress state is very important for preventing common problems in stone materials. The surface of the steel plate is relatively smooth and prone to deformation, which is inconsistent with the deformation of the stone and prone to detachment. Therefore, improving the bonding strength and reducing stress are the key points.
● Construction process flow and operation points
01. Construction process flow
Tool preparation → Base treatment → Brush stone waterproof backing adhesive → Paste construction → Leave joints → Fill joints construction → Finished product protection
02. Key points of operation
① Base inspection
Carefully inspect the condition of the base wall, and the base should be stable and firm. Clean up dirt, oil stains, and other debris that are not conducive to bonding on the base layer.
② Mixing waterproof interface agent
③ Applying waterproof interface agent on the base layer
Applying stone backing adhesive
① Apply stone waterproof adhesive on the construction site
◆ Mixing adhesive backing
◆ Painting method
Before painting, the surface must be cleaned to remove dust, dirt, oil stains, etc. from the bonding surface of the stone slab;
Place the stone slab flat on the ground and evenly apply the slurry to the bonding surface of the slab with a brush. The thickness should be controlled at around 0.8mm, with a dosage of about 0.9kg/m2. The surface drying time at room temperature should be 0.5-1 hour. After one day of natural maintenance, the pasting construction can be carried out.
② Pre coating of stone waterproofing adhesive by the stone panel factory
◆ Mixing adhesive backing
◆ Painting method
Before batch coating, use tools such as brushes, shovels, etc. to clean the dust, dirt, oil stains, etc. on the bonding surface of the stone slab, so as to keep the surface of the stone slab clean; Place the stone slab flat on the bracket, press the pre cut mesh cloth onto the surface of the stone slab, pour an appropriate amount of slurry onto the mesh cloth, and use a batch plate to evenly scrape the slurry onto the entire surface of the stone slab, covering all the mesh cloth, and controlling the thickness of the slurry to 0.8mm.
Usually, one batch of application is sufficient. For stone materials such as cave stones, the back glue can be directly applied to the surface of the board in advance, and then scraped and applied again using the method of a batch net. The dosage is about 1.5kg/m2, and the surface drying time at room temperature is 0.5-1 hour. After one day of natural maintenance, the pasting construction can be carried out.
● Pasting construction
① Grassroots treatment
Before pasting, it is necessary to carefully inspect the base layer. If there are various substances such as oil, floating dust, and loose materials on the surface of the base layer that are not conducive to bonding, they must be cleaned before bonding can be carried out. Both the base layer and decorative materials do not need to be wetted with water, and the bonding surface of the decorative materials should be kept clean.
② Preparation of AD-1025R two-component flexible adhesive