Quality Control Measures for the Construction of Emery Abrasion-Resistant Flooring
Release Time:
2016-08-29
Source:
Quality Control Measures for the Construction of Emery Abrasion-Resistant Flooring
Quality Control Measures for the Construction of Emery Abrasion-Resistant Flooring
1. Strengthen training in operational skills and pre-job assessments for operators.
(1) Develop a training plan and curriculum based on the actual conditions of the project, with course materials covering key construction points for quartz-sand wear-resistant flooring, relevant construction acceptance standards, and construction experience from similar projects.
(2) The project department shall organize relevant management personnel and technical backbones to provide detailed briefings on drawing requirements, quality standards, the specific construction characteristics of this project, and key points to note. Subsequently, highly skilled and experienced senior technicians from each trade shall conduct specialized training on their respective trade’s operational techniques in accordance with relevant codes and standards, and demonstrate the actual operating procedures.
(3) One week prior to the commencement of wear-resistant flooring construction for this project, all relevant operational personnel are required to undergo designated training and pass both a professional theoretical knowledge assessment and a practical skills evaluation. Only those who successfully pass these assessments may participate in the wear-resistant flooring work for this project.
2 Concrete Placement and Curing
(1) In light of the actual conditions of the project, a specific concrete construction plan shall be prepared prior to concrete placement, specifying the sequence for concrete pouring. Concrete placement shall be carried out in designated sections and in accordance with the prescribed sequence, and efforts should be made to place the concrete in a single operation up to the design elevation, thereby avoiding delamination between the surface layer and the underlying cushion layer that may result from two separate pours.
(2) Draw a partitioning schematic based on the garage layout, with each bay 6 meters wide and the centerline of the frame columns positioned at the bay divisions.
(3) Erect and support the formwork according to the design elevation, ensuring that the formwork edges are properly aligned and do not shift during concrete placement. During concrete placement, ensure thorough vibration to achieve dense compaction and a surface free of exposed aggregate; finally, use a screed bar or straightedge to level the concrete surface, and apply mortar to the formwork edges using a wooden trowel.
(4) Assign dedicated personnel to use a level instrument to continuously monitor surface flatness, ensuring that the concrete surface meets the specified requirements (typically within a tolerance of ±4 mm).
(5) Concrete shall be cured using a specialized curing agent at a dosage of approximately 0.2 liters per square meter. Immediately after the surface has been leveled, the agent shall be evenly sprayed over the entire area to form a dense, water-impermeable protective film that prevents the evaporation of moisture from the concrete itself, thereby achieving the intended curing effect. This curing method delivers superior results compared with conventional cover-and-watering curing, ensuring both the strength and aesthetic quality of the concrete.
3. Accurately determine the timing for applying garnet abrasive during construction.
(1) Prior to spreading the garnet abrasive, the concrete surface shall be dense, smooth, and free of bleeding.
(2) When the concrete is in its initial set and a finger press leaves a 3–5 mm impression, evenly spread the quartz sand in two passes in the vertical direction.
(3) Once the garnet hardening material has absorbed moisture from the concrete and become damp, use a troweling machine to compact and finish the surface.
(4) Quality inspectors shall monitor the construction process to ensure compliance with requirements.
4. Strictly control the timing of transverse joint opening.
(1) Prior to joint-opening construction, prepare a specific technical briefing and provide both written and oral briefings to the operators.
(2) A dedicated person shall be assigned to open the joints 3 days after completion of the surface layer construction, with a joint depth of 5 cm.
(3) Mark the joint lines before cutting; during the cutting process, two workers should coordinate their movements, maintaining a moderate pace; after cutting, ensure that the expansion joints are straight and aesthetically pleasing.
(4) Quality inspectors shall monitor the construction process to ensure compliance with requirements.
5 Construction Results
Through the implementation of the aforementioned technical measures, the finished floor surface is smooth, level, and uniformly colored, with straight and well-defined expansion joints, resulting in excellent visual quality. The overall elevation deviation of the floor is controlled within ±3 mm, and the surface flatness deviation is kept within 2 mm. The wear resistance of the floor is improved by 200% compared with concrete floors of the same strength grade, and the surface Mohs hardness exceeds 7, thereby meeting the design service requirements. The construction quality has been highly praised by the owner.
