The fair-faced concrete, also known as decorative concrete, is named after its highly decorative effect. It is a cast molding and does not have any exterior decoration. It directly uses the natural surface effect of cast-in-place concrete as a finish. Therefore, unlike plain concrete, the surface is smooth, uniform in color, angular, with no damage and pollution, but only on the surface. Applying one or two layers of transparent protective agent is very natural and solemn. Then, the following Xiaobian introduces the construction techniques for fair-faced concrete repair and fair-faced concrete.
Clear water concrete repair
1. When its chromatic aberration and cellular conditions occur, we need to repair it in time and re-color it. The color difference between the concrete after it and the concrete around it is very serious. This kind of concrete is repaired to the staff. The technical level required is very high, and the color of the concrete after repair is improved by using the protective material of fair-faced concrete. Use patching materials to achieve patching.
2. Although we have carried out various protective measures for the plain concrete after construction, there are still some small bubbles in the relationship after the demolishing. We should immediately remove the floating slurry and the loosened sand. When the same kind of cement with the same strength is used to mix and agitate, the defective part is repaired, and after waiting for the repair to harden, all surfaces are smoothed with fine sandpaper to ensure that no color difference occurs on its surface.
3. In the case where the quality of the water pouring used by us is relatively poor, leakage of slurry and sand leakage occur many times, and most of the surfaces have a honeycomb phenomenon, and we can follow the actual problems of different surfaces. To make a special ratio, the defective part of the concrete was repaired, so as to achieve cement repair cement to achieve, for some companies to replace the use of paste repair.
Clear water concrete construction technology
1. Formwork construction
(1) Template design and processing
According to the design height 13m, length 34.6m, and thickness 0.5m of the clear-water concrete wall, the requirements for designing the wall quilting and the open seam shall be designed. The wall surface template shall be assembled with covered bamboo veneers with a thickness of 12 mm and 1220×2440 mm. Glossy bamboo plywood has features such as high strength, good toughness, smooth surface, wide web, few seams, and easy mold release.
(2) Template installation
After the pouring of foundations is completed, the height of the foundation roof shall be strictly controlled to ensure the level of the upper wall template. The control of the verticality of the template is a key process, and each template must be strictly controlled before being fixed. The vertical transport of the formwork on the scaffold uses hand hoists, and the horizontal transport is carried by hand. The template must be protected during use to ensure that it is not damaged. In order to ensure that there is no leakage of pulp between the template and the template, double-sided adhesive is applied in the seam of the template to ensure continuous closeness between the two templates. Wipe clean the template before installation, and apply a release agent evenly on the surface.
(3) The layout of the template bolts
Reinforce the pull bolts, insert the wall sleeve to locate the plug to ensure the position of the hole through the hole is tight, to prevent leakage of the slurry, the strength of the wall sleeve should be enough to locate the template spacing, to resist the liquid pressure of the new pouring concrete without generating the template The gap is too large and the slurry leaks.
2, Ming joint construction
The Ming-slit is a block-by-block treatment of the entire surface of the fair-faced concrete, and thus achieves the same construction technology as the building's structure and appearance. Construction joints should be consistent with each horizontal seam. The design size of the open seam is 2*1cm. When installing the formwork, it is fixed on the bamboo plywood. The open seam requires straight lines, smooth and smooth, and is formed by the embedded seams attached to the template during the concrete construction. In order to select the right molding materials, we comprehensively compared several materials such as wood strips, stainless steel strips, and plastic strips. Finally, we decided to use plastic strips with good quality and performance that are easy to install. In order to facilitate the detachment of the bright seams, the seams are machined into beveled corners, and the surface of the seams is coated with a release agent or butter.
3, Zen seam construction
Zen stitching is a well-designed and regular decorative line on the surface of fair-faced concrete. It can show the beauty of rhythm and rhythm. It is formed by template patchwork. It divides and decorates the surface even further than the open seam. Must take into account the template's specifications, construction arrangements, decorative effects and so on. The problems such as the imperfection of the joints in the formwork, the unevenness of the side of the formwork, and the inconsistent thickness of the neighboring formwork all result in leakage or misalignment of the stitching joints and affect the quality of the perception of the zenith joints.
Editor's summary: About the fair-faced concrete repair and the construction of the ready-made concrete is introduced here, and I hope to help everyone. If you want to know more related information, you can pay attention to this website information.
Concrete staircase
Countersunk Head Tapping Screws
Countersunk head tapping screws which also called cross recessed countersunk head tapping screws have a cross-shaped slot and is widely used in industrial, industrial and construction fields for the purpose of assembling the connection of structural parts.
Fasteners are made of stainless steel, which does not corrode even in aggressive environments
Stainless steel fasteners with countersunk head tapping screws are commonly used in various applications due to their durability, corrosion resistance, and aesthetic appeal. Here is a description of these fasteners:
1. Material: These fasteners are made of stainless steel, which is a versatile alloy composed primarily of iron, chromium, and nickel. The stainless steel composition provides excellent resistance to corrosion, making them suitable for both indoor and outdoor use.
2. Head Type: Countersunk head refers to the shape of the screw head. It is flat on the top and tapered on the sides, allowing it to sit flush with the surface when properly installed. This design minimizes the risk of snagging or accidental damage, making it suitable for applications where a smooth surface is desired.
3. Tapping Screws: Countersunk head tapping screws are designed to create their own threads when driven into a pre-drilled hole or a softer material like wood or plastic. The self-tapping feature eliminates the need for a separate tapping or threading operation, making them convenient and time-saving.
4. Versatility: These fasteners are available in various sizes, lengths, and thread types to accommodate different applications. They are commonly used in woodworking, construction, automotive, and electronics industries, among others.
5. Corrosion Resistance: Stainless steel fasteners are highly resistant to corrosion, making them suitable for applications exposed to moisture, chemicals, or harsh weather conditions. This property ensures the longevity and reliability of the fasteners, even in demanding environments.
6. Aesthetic Appeal: Stainless steel fasteners with countersunk head tapping screws often have a polished or brushed finish, giving them an attractive appearance. They are commonly used in applications where aesthetics are important, such as furniture, architectural installations, or decorative fixtures.
Overall, stainless steel fasteners with countersunk head tapping screws offer a combination of strength, corrosion resistance, and aesthetic appeal, making them a popular choice in various industries and applications.
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