Coating technology: key points of construction quality control of building waterproof Engineering

Core tip: building waterproofing is a comprehensive and practical engineering technology, which plays an important role in the use function of building engineering According to the engineering supervision practice of several projects, the quality control points of building waterproof engineering are put forward for building roof, basement, toilet room and water storage pool According to the analysis of the leakage phenomenon of the waterproof engineering by the relevant departments, the leakage causes are 20% - 30% due to the bad materials, 45% - 48% due to the rough construction, 18% - 26% due to the design problems, and the so-called four leakage (roof) of the construction waterproof engineering quality Application scope and advantages of roller ceramic coating Recommended introduction: the surface of ceramic rubber plate used for roller ceramic coating is cast into durable rubber plate by hundreds of independent small ceramic pieces Each ceramic piece has raised characteristics Under general conveyor belt pressure, thousands of unique cast bumps can produce positive traction, prevent slipping and extend the service life of conveyor belt roller At the same time, the bottom layer adopts high-quality rubber, which has strong elasticity and can play a good impact resistance role The scope of application of roller ceramic coating is one three six 83857180 (the same as V) 1 Roller coating in extremely harsh working environment 2 The belt joint is not suitable for fixing with iron buckle; 3 It is suitable for leather Home of coatings news: building waterproofing is a comprehensive and practical engineering technology, which plays an important role in the use function of building engineering According to the engineering supervision practice of several projects, the quality control points of building waterproof engineering are put forward for building roof, basement, toilet room and water storage pool According to the analysis of the leakage phenomenon of the waterproof engineering by the relevant departments, the leakage causes include 20% - 30% due to the poor materials, 45% - 48% due to the rough construction, 18% - 26% due to the design problems, and the so-called four leakage (roof leakage, toilet and bath leakage, external wall leakage) of the construction waterproof engineering quality Body leakage and basement leakage have become common quality problems, which should be paid attention to 1 The waterproof layer is attached to the base of the main structure, and its quality directly affects the quality of the waterproof layer The rigidity, flatness, strength and surface slope of the main structure and the leveling layer are accurate, and the surface is perfect without sanding, peeling, joint and the moisture content of the base are the basis for ensuring the construction quality of the waterproof layer 2 Key points for control of construction conditions of waterproof layer (1) whether the construction conditions are mature or not is directly related to the construction quality Most of the open-air operations of waterproof works are greatly affected by climate factors During the construction period, rain, snow, frost, fog, strong wind and temperature lower than 5 ℃ or higher than 35 ℃ will affect the construction quality of the waterproof layer, and also hinder the smooth construction and operation of the construction workers Hot melt towel roll And solvent coating can be constructed under the temperature above - 10 ℃; asphalt, modified asphalt and high polymer coiled material should not be constructed under 0 ℃; asphalt based coating, high polymer water emulsion coating and rigid waterproof layer should not be constructed under the temperature below 5 ℃; when the temperature exceeds 35 ℃, all waterproof layers should not be constructed; in the middle of the night after hot summer, due to dew, grade 5 Under the strong wind weather, the dust and sand particles affect the bonding with the base course, and the polluted base surface shall not be subject to waterproof construction (2) Pay attention to the cross problems between the waterproof layer and the construction of related layers The materials used for the waterproof layer must be based on the factory certificate and test report At the same time, the waterproof test must be done before the use on site, and the materials can only be used after they are qualified The layers related to the waterproof layer are leveling layer, vapor barrier, insulation layer, isolation layer, protection layer, etc The construction of waterproof layer often needs cross operation with the relevant layers The construction quality of these relevant layers has a great influence on the quality of waterproof layer, even directly affects the success or failure of waterproof project Special attention shall be paid to the construction of the protective layer, and the waterproof layer shall not be damaged or punctured 3 Key points for quality control of coiled material waterproof construction: the types of coiled material waterproof are various, and the commonly used construction technologies include hot sticking method, hot melting method, self sticking method, mechanical fixing method, embedding method, etc During the construction, the Contractor shall check that the construction is carried out in strict accordance with the construction specification requirements such as the construction process standards and the construction process flow The laying direction, two sheets of coiled materials, the layer to layer of coiled materials, and the width and length of foundation lap joint shall meet the requirements During the cold bonding construction of coiled materials, the bonding materials shall be selected according to the performance of coiled materials, and the adhesives shall be allocated by specially assigned personnel, and the samples shall be taken and tested in time, and shall not be misused or mixed, which shall be strictly controlled Strictly control the moisture content of the base course to meet the requirements before pasting Pay attention to the treatment of internal and external corners, reinforcement layer and other detailed nodes 4 Key points for quality control of coating waterproof construction the coating waterproof construction is divided into thin coating construction and thick coating construction according to the thickness of the coating Whether the thin coating is applied by painting method or the thick coating is applied by plastering and pressing method, it can be applied by coating alone or by coating with matrix reinforced material (such as glass) Fiber or chemical fiber) shall be made into one cloth, two cloths and three coats, and multi cloth and multi coat shall be achieved: the specification and model of waterproof materials shall meet the design requirements; the operation and construction methods shall meet the requirements; the formula of waterproof coating shall meet the process requirements; the matrix reinforcement materials shall match the used coating correctly; the construction and operation conditions, ingredient temperature, construction environment temperature (air temperature), operation The dosage and sequence of time batching, mixing strength and coating times (Times) must conform to the process regulations The construction sequence must be carried out according to the principle of first high then low, first far then near 5 Key points for construction quality control of sealing waterproof materials: the commonly used sealing materials are mainly modified asphalt and synthetic polymer sealing waterproof materials; according to different materials, the construction methods are divided into cold inlay method and hot irrigation method In order to ensure the construction quality, supervision and control should be carried out in several key links, such as the first use of construction machines and tools, batching and mixing, bond performance test, control of inlay backing materials, and construction operation During the hot pouring operation, attention shall be paid to the field plasticization and heating temperature of the sealing materials, which are generally 110-130 ℃; the maximum temperature shall not exceed 140 ℃; attention shall be paid to the temperature measurement of the thermometer used, which shall be conducted at about 100mm below the central liquid level When plasticizing or heating to the temperature (not lower than 110 ℃), it shall be poured on site immediately, and the inlay shall be 3-5mm higher than the slab joint The cold inlay construction shall be conducted manually from the bottom to prevent missing inlay and virtual filling, and attention shall be paid to avoid air mixing; the inlay shall be dense and full, and it shall be conducted in sequence, and it is best to operate with electric or manual caulking gun 6 The selection and construction of the protective layer materials of the waterproof layer shall be carried out according to the design drawings During the construction of the protective layer, attention shall be paid to the protection of the waterproof layer Temporary protection measures shall be taken on the waterproof layer to prevent the waterproof layer from being punctured After the construction of the waterproof layer, the next construction process shall be carried out as soon as possible The interval shall not be too long to prevent the material damage of the waterproof layer 7 The construction of rigid waterproof layer requires that the rigid waterproof layer includes the construction of fine aggregate concrete waterproof layer, cement mortar waterproof layer, block rigid waterproof layer and waterproof concrete The rigid waterproof layer is very sensitive to the uneven settlement of foundation, temperature change, structural vibration and other factors, so the foundation treatment requirements are strict Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,