1. Design requirements:
All exterior walls of the building are made of 80mm thick composite phenolic fireproof insulation board (combustion performance is A2 level, and the rest of the performance parameters are detailed in the drawings), and all cold bridges and thermal bridges such as air conditioning boards and canopies are smeared with 30mm inorganic thermal insulation mortarBay windows and other bay windows are made of 80mm composite phenolic fireproof insulation boards
All exterior walls of the building are made of 80mm thick extruded polystyrene board (combustion performance is not lower than B1 grade, and the rest of the performance parameters are detailed in the drawings), the fireproof isolation belt is made of rock wool board (the combustion performance is Class A, and the rest of the performance parameters and setting requirements are detailed in the drawings), and all air conditioning boards, canopies and other cold bridges and thermal bridges are smeared with 30mm inorganic insulation mortar (Bay windows and other bay windows are insulated with 80mm extruded polystyrene insulation boards
All exterior walls of the building (clubhouse building (activity center) are made of 50mm thick extruded polystyrene board (combustion performance is not less than B1 grade, and the rest of the performance parameters are detailed in the drawings), and the fireproof isolation zone is made of rock wool board (the combustion performance is Class A, and the rest of the performance parameters and setting requirements are detailed in the drawings), and all cold bridges and thermal bridges such as air conditioning boards and canopies are smeared with 30mm inorganic insulation mortar.
All exterior walls of the building (kindergarten) are 60mm thickComposite phenolic fireproof insulation board(The combustion performance is not lower than A2 level, and the rest of the performance parameters are detailed in the drawings), and all cold and thermal bridges such as air conditioning panels and canopies are smeared with 30mm inorganic insulation mortar.
IIConstruction operation process measures and main practice requirements
1. Process flow.
After the sample is confirmed, the sample is sealed, the material enters the site, the data is verified, the dry density is tested, the sampling is sent for inspection, the base wall is treated, the handover is handed over, the external wall insulation board is paved, and the construction is inspected and accepted.
2. Key points and requirements of construction operation:
2.1. Bomb control line: According to the technical requirements of building façade design and external wall external thermal insulation, horizontal and vertical control lines are placed to determine the specific construction parts of the fire isolation belt and the external wall window cover.
2.2. Hang the reference line: hang the vertical reference wire at the big corner of the building exterior wall (yang angle, yin angle), the vertical edge of the external window and other necessary places.
2.3. Insulation board pasting method:
2.3.1. The insulation board is pasted with adhesive anchors and is mainly glued. The process of sticking the board is carried out from bottom to top, and the upper and lower boards should be pasted with staggered seams, especially the upper and lower parts of the fireproof isolation belt and the insulation board must also be staggered constructionThe bonding method of the insulation board adopts the point frame method construction, and the paste area is more than 40%.The bonding method of rock wool fireproof isolation belt adopts the full adhesive method.
2.3.2. At the corner of the wall, the size should be arranged first, and the board should be cut to make it vertically staggered, and the verticality of the wall corner should be ensured.
2.3.3. When pasting the sunny corners around the window frame and the outer wall, the vertical datum line should be hung first, as the basis for controlling the vertical up and down of the sunny angleThe extruded plastic board at the four corners of the door and window openings should be cut into an "L" shape for paving and pasting, and should not be spliced.
2.3.4. Anchor fixing: When using mechanical anchors to anchor the extruded plastic board, the anchor installation should be carried out at least 24 hours after the adhesive, and the impact drill should be used to punch holes inward on the surface of the polystyrene board on the concrete wall, and the hole diameter depends on the anchor, and the depth of the wall is not less than 35mm. Screw in the anchor nails, the nail head and the disc shall not exceed the plate surface, the number of anchors and anchors are selected with pressure plate expansion bolts, the diameter of the plastic disc is not less than 50mm, and the standard value of the tensile bearing capacity of a single anchor is not less than 03kn。The number of anchors of the insulation board is not less than 5 per square meter with a height of less than 24m, and not less than 7 per square meter with a height of more than 24m, and anchors are set at the junction of all gaps, and anchors are set at the corners of the wall, the horizontal and vertical directions of the edges of the doors and windows should be encrypted, and the spacing should not be greater than 300mm, and the anchor bolts should not be less than 60mm from the edge of the base wall.
2.3.5. Preparation of plastering mortar: the amount of a preparation should be controlled at 1It will be used up within 5 hours, and it is not allowed to add water again after the operating time is exceeded. The mix ratio of plastering mortar refers to the proportion provided by the manufacturer.
2.3.6. After the installation of the insulation board is completed, the mortar is plastered after inspection and acceptance. on the wall of the insulation boardWipe the faceMortartotalThicknessNot less than5mm。When wiping the polymer mortar for the first time, the reinforced edging mesh cloth around the door and window openings is wrapped on the surface of the extruded plastic board with polymer mortar, when the first plastering mortar is smoothed and not dry, the mesh cloth is tightened and attached to the bottom plastering mortar with a trowel from the middle to the surrounding to press the mesh cloth into the mortar, to be leveled and compacted, and finally the second plastering leveling of the surface layer is carried out. The width of the left and right lap of the mesh cloth is 100mm, and the width of the upper and lower lap is 80mm; Do not make the mesh cloth wrinkled, hollow, and warped. The fullness of the mortar is required to be 100%, and dry lap joints are strictly prohibited. At the yin and yang corners of the wall, the mesh cloth embedded in the wall on both sides must be cornered in both directions and overlapped with each other, and the lap width of each side is not less than 200mm.
2.3.7. Lay a piece of mesh cloth along the 45 direction at the four corners of the door and window openings for reinforcement. The size of the reinforcing net is 200*400, and the pasting position is at the four corners of the door and window openings at an angle of 45 degrees with the opening. The size of the door and window openings is 200mm + plate thickness, and the insulation board is 100mm.
2.3.8. Install the drip trough: according to the drawing design, pop the position of the drip trough on the insulation layer of the insulation board, and then use a wallpaper knife to open the groove along the spring drip trough, and the size of the groove should be 10mm wider and 5mm deeper than the drip trough required by the design. After embedding anti-cracking mortar in the groove and pasting the alkali-resistant glass fiber mesh cloth, the drip groove is embedded in the groove, which is firmly bonded with the anti-cracking mortar, and the stubble is smoothed with the anti-cracking mortar, and the impurities in the groove are cleaned up in time after the final setting of the anti-cracking mortar.
3. Quality control requirements:
1. Acceptance of raw materials.
After the insulation board, insulation mortar, adhesive mortar and plastering mortar enter the site, notify the general contractor, supervision, and construction unit materials department to jointly verify the manufacturer's qualification certificate, business license, insulation record, insulation board parameters and other information, after the data is qualified (insulation mortar, adhesive mortar and plastering mortar data can be sampled and sent for inspection, and a sample can be sealed on site), the insulation board and rock wool need to be spot-checked on the dry density, and the dry density is qualified after sampling and inspection (a sample is sealed on site), and the exterior wall construction can only be started after the re-inspection is qualified. Anchor nails and mesh cloth provide samples in advance, and seal the sample after the approval of the three parties, and then the material enters the site for acceptance according to the requirements of the sealing sample.
Note: Each batch of insulation materials need to be accepted in accordance with the acceptance requirements of this article, and it is recommended that the exterior wall construction unit calculate the amount of materials in advance according to the building number under construction, and enter the whole batch as much as possible;
2. Model construction:
Each team needs to construct the exterior wall insulation model in the designated area before construction, report to the tripartite acceptance, take pictures and seal the sample after acceptance, and each team must carry out large-scale construction in accordance with the model construction standards after acceptance.
3. Construction acceptance:
Nodes to be accepted: after the construction of the exterior wall model is completed, the wall base acceptance before construction, after the anti-package net is fixed, before the insulation board is paved and nailed, after the nailing, and after the plastering construction is completed.
Participants: quality inspectors, supervision engineers, and civil engineers of the construction unit of the general contractor (among them, the acceptance of the exterior wall model and plastering needs to be attended by the technical person in charge of the general contractor, the chief engineer, and the project manager of the construction unit).
4. Acceptance criteria:
Note: The general contractor, the supervision company, and Party A shall carry out acceptance in strict accordance with the acceptance standards. For the unqualified parts of the acceptance, it is forbidden to carry out the next process.
4. Precautions
1) The construction environment must ensure that the temperature is above 5 degrees, and the wind force shall not be greater than level 5.
2) Ensure that the floating ash of the base layer is clean.
100% of the bonding area of the fireproof isolation tape
4) It is strictly forbidden to have ash between the seams of the insulation material boards.
5) The construction of the plastering layer must be allowed only after the adhesive mortar is completely dry.
6) The bottom mortar must be smeared, and the net is not allowed to be hung dry.
7) Because the rock wool insulation material used in the fire isolation belt is a high water absorption product, the rock wool material should be protected from rain in the construction project, and the insulation board surface should be wiped in time after the mortar is dried.
8) After the construction gondola enters the site, notify the three parties to verify the data performance of the machinery, and notify the three parties for acceptance after the installation is completed, and it is not allowed to be used if it is not accepted.
9) The construction site shall comply with the management requirements of the general contractor on quality, safety, progress, civilized construction and dust.
10) All acceptance shall be completed by the general contractor and then submitted for inspection.
11) After the concealed project is no longer accepted, it is forbidden to carry out the next process.
12) On-site dust control obeys the management of the general contractor and meets the requirements of the first document issuance.
13) The material stacking is subject to the management of the general contractor, and the waste materials left on the site are cleaned up after the construction is completed every day.
14) Comply with the project management measures issued by the construction unit.