Polyaspartic Waterproofing: Selection to Acceptance
Combination of substrate judgement, supporting layers, nodal enhancement and acceptance of finished products around the surface, underground space and humid areas.
Project conditions first.
Record the type of base material, the environment in which it is used, whether it is inundated for long periods, whether it is exposed and subsequently loaded. Underground space should also recognize the risks of surface, backwater and continuous retour.
Material selection should not be limited to “waterproof” labels, but should include adhesive, flexible, durable, water resistant and recoat window.
Create complete coating structure
Common structures include closed primer, flat coating, weak node enhancement layers and polyaspartic polyurea topcoat. (b) The porous concrete should be closed first; Cracks, yang angles, tubing roots and water landings should be enhanced by nodal programme.
Each material should be connected within the specified recoat window. When the window is exceeded, the cleaning, grinding or interface processing is done on a product technical basis.
Construction process control
Use a term heavy formulation, which is fully blended at low speed and readily available. Simultaneous recording of environmental humidity, substrate temperature, dew point differential, batching and actual usage in construction.
The membrane thickness is subject to joint control through theoretical volume, membrane sampling and review of thickness after completion to avoid a blind thick coating.
Acceptance and delivery
The appearance shall be continuous, uniform, non-spill-free, needle holes, bubbles, cracks and detachments. Closed or aquifer tests shall be performed after the coating has reached the required state of conservation.
Specific thickness, test time and acceptance indicators are based on design documents, products TDS and project technology agreements.
Design deepening and material selection
The deepening of water prevention programmes should start with water sources, motion paths and conditions for discharge. The surface needs to take into account both rainfall, water accumulation, heat swelling and cooling and ultraviolet light; Underground space needs to distinguish between the surface and the back, and to confirm whether the structural cracks are still developing; The basics of equipment, gutters and bathrooms are also assessed for vibration, water washing and chemical media. Once the condition has been determined, the primer containment, neutral coating and topcoat tolerance levels are selected, and not all parts can be summarized in a single “waterproof grade”. The design document should clarify the nodal approach, the thickness of the target dry membrane, the theoretical use of the unit area, the permissible deviation and the maintenance interface, to facilitate the use of the same calibre for procurement, construction and acceptance.
Polyaspartic polyurea reacts more rapidly and the programme should also match organizational capacity in the field. Large areas of the house should be divided into construction areas and continuous operating belts, with pre-planned feed points, transport routes, closing positions and numbers of personnel. Colours, batches and construction orientations will also be harmonized ahead of schedule to reduce matching differences. For new materials or complex old substrates, it is proposed that a full-scale model area be produced to observe infiltration, bubbles, curing, attachment and appearance before deciding whether to expand construction. The template is not a demonstration of action, but a determination of whether materials, equipment, people and the environment together can produce stable results.
Construction and process records for nodes
Angry angular angles may be modified into continuous arcs, the plume root is removed and a smooth transition is formed, and the height of the landing gate must ensure that the discharge is in the right direction. The cracks should first be judged by static or dynamic properties: the stable cracks can be repaired by opening slots and additional layers added, while the remaining bits of the cracks need to be constructed with the permitted deformed nodes. Construction stitches, deformations and different materials interfaces cannot rely on topcoat simple coverage, and should be designed to be sealed, beads or softly enhanced layers. Following the completion of each node processing, the continuity is checked to confirm that there are no edges, empty drums and collages, which are then fully coated.
Process records include at least date, area, weather, temperature of air, substrate temperature, dew point differential, substrate state, material lot number, A/B stat, time of starting and ending of mixing, time of end of use and actual usage. Higher temperatures reduce the pit life, lower temperatures slow curing, and the site adjusts the single ration to the condition of the material rather than arbitrarily alters the ratio. Substrate conditions shall be re-measured after the rain, at night when the tide returns or when the morning surfaces. Bubbles, needle holes or local whites are found to be immediately covered and the cause of water vapours, vents or contamination is first identified to avoid closure of defects at subsequent levels.
Receiving and inspection, protection and maintenance
Acceptance should be carried out at four levels: appearance, thickness, node and function. (a) The appearance of the requirement of continuous flatness, with no leakage, accumulation, cracking, needle holes and abnormal adhesiveness; The thickness is checked at the agreed location and frequency and cannot be taken only from the construction area; The roots, drops, the end of the daughter's wall and the basis of the equipment must be examined on a case-by-case basis. Where closed water or water storage tests are required, the coating should wait for the required state of conservation and the protection of surfaces that have not yet been fully sequestered. Both drainage slopes, low-lying water and leakage from adjacent space were observed in the experiment, resulting in a retroactive record.
Upon delivery, a system of house inspections should be established, focusing on the congestion of drainage vents, the tuning of sharp objects, the retrofitting of equipment and the introduction of new perforations. Minor scratches should be treated before contamination and moisture enter the layer; Local patches are cleaned, sharpened to a solid interface, then the layers are restored to the compatible system and the patch edges are smoothed. It is strictly prohibited to cover it directly with unknown seals or with paints of different systems. The preservation of raw material models, colours, batches, construction photographs and surplus information can significantly reduce later positioning and maintenance costs.
Project landing and risk review
Prior to formal entry, the project leader shall organize a review of the design, materials, construction and user's common completion conditions and convert the drawing requirements into an on-site list of enforceable areas. The list contains, at a minimum, the type and state of the base materials, the target level and film thickness, the location of nodes, batches of materials, single batches, construction tools, division of labour, environmental control, repainting time and conditions of openness. Synchronization of cross-operations, temporary power, ventilation, fire protection and product protection to avoid interference with welding, cutting, dusting or installation of equipment. Following the completion of the first area of operation, a team self-check and technical review was conducted to compare actual usage, solidity and sample results and to confirm that there were no systemic deviations that could be carried out successively.
Quality management should have suspended inspection nodes instead of waiting for full coverage of the latter acceptance. The photographs and data are checked and stored before the substrate processes are completed, the Primer closures are closed, the defects are fixed, the key nodes are enhanced and the topcoat is delivered. In the event of an abnormal state of material, transboundary environment, batch changes or large area defects, the area shall be immediately isolated, samples and records maintained and the disposal method determined by the technicians. Any return to work will be accompanied by a breakdown interface, scope of processing, application of materials and results. The transformation of laboratory performance from stable to long-term use at the engineering site is achieved through piloting, process testimony, data marks and closed loop re-examination.