Fair-faced concrete slab is a common building material, and its manufacturing process and technical points can be analyzed from the following aspects:
1.Material Selection:The manufacture of fair-faced concrete slabs requires the selection of suitable materials, mainly including cement, sand, gravel and water. The cement should be ordinary Portland cement or slag cement that meets the national standards. Sand and gravel should be of good quality, free of impurities and doping.
2.Mix design:According to the requirements of the construction requirements and the strength grade, determine the mix ratio of the fair-faced concrete slab. The design of the mix ratio should fully consider the water-cement ratio, sand ratio, aggregate particle size and the use of admixture.
3.Equipment & Mold Preparation:Prepare the equipment and molds required to make fair-faced concrete slabs. Equipment such as concrete mixers, pavers, formwork and vibrators are generally required. The selection of the mold should meet the size and surface finish requirements of the fair-faced concrete slab.
4.Concrete mixing:According to the mix ratio, the cement, sand, gravel and water are put into the mixer for thorough mixing. During the mixing process, the mixing time and mixing speed should be controlled to ensure that the concrete is uniform and the slurry fluidity is appropriate.
5.Paving and compaction:The concrete is evenly paved into the mold and the concrete is evenly spread using a paver. At the same time as paving, vibratory compaction is carried out using a vibrator to remove air bubbles in the concrete and improve the uniformity of the slab surface.
6.Conservation:After the concrete slab has been paved and compacted, it needs to be cured. Usually the method of covering wet cloth or spraying water curing is adopted to ensure that the curing period of the concrete slab meets the design requirements and ensure the strength and durability of the concrete.
7.Demoulding and trimming:After the concrete slab is cured, the formwork can be dismantled, and the slab surface can be trimmed and sanded to improve the finish and flatness of its surface.
It should be noted that before manufacturing fair-faced concrete slabs, it should be based on specific engineering requirements and standards, and refer to local construction specifications and technical regulations to ensure the rationality and feasibility of the manufacturing process and technical points. In addition, during the construction process, it is necessary to ensure on-site safety and operation specifications, and ensure the personal safety of operators and the controllability of construction quality.