Construction and Quality Control of Composite Thermal Insulation Wall Yang Lixin (Qingdao 115100, Dashiqiao, Liaoning Province, China) Ding Lei (Yingkou 115000, Liaoning Energy Research Institute) in solar energy buildings, energy-saving buildings and sunlight greenhouses The thermal performance of the protective structure, the external wall is usually composed of a composite of red brick and insulation materials, and its structure includes three parts of the outer protective layer, insulation layer and internal bearing wall (see). The thickness of the insulating composite retaining wall construction material is determined by thermal calculation. Commonly used heat-insulating materials include polystyrene foam panels, expanded perlite, rock wool, dried straw, and rice husks.

1 Construction points The construction of composite heat insulation wall can use the following two methods.

The single-sided masonry method first builds the inside wall, and when it is built to a certain height (typically 8 to 10 tiles), the board-shaped heat insulation material is placed, and then the outside wall is masoned, and the tie-bar reinforcement is arranged as required (no design When required, the tension bars are arranged with *6nrn vertical and horizontal spacing of 500mm, as shown.

The double-sided masonry method simultaneously builds the inner and outer walls. When the bricks are set to a height of 8 to 10 tiles, the insulation material and the tie bar reinforcements are placed one after the other (see below).

2 Operation Process 2.1 Material Preparation The type and strength grade of clay bricks must meet the design requirements and have factory certification. The double-sided masonry method must be used to wet the bricks on the day before the masonry is constructed. The moisture content is not more than 15%. The dry bricks shall not be used for construction under normal temperature conditions.

Masonry mortar mix ratio should be used weight ratio (cement generally should use 325 ordinary portland cement or slag portland cement; sand is medium sand, preparation of mortar below M5 when the sand mud content does not exceed 10%, preparation of M5 or more The mud content of the sand does not exceed 5% when the mortar is used; the aging time of the white lime paste is not less than 5d). The calculation accuracy of cement is ±2%, and the sand and gray are ±5°/.......When mixing, mechanical stirring should be used. When the stirring time is not brick, the first brick bottom of the bearing wall at the bottom, the two gable bricks , Before and after the vertical wall row of bricks, and according to the position line has been bombed windows and doors, check the length of the window between the window, the length of the brick meet the module. If the modulus is not satisfied, the position of the door window can be properly moved.

Corners should be cornered when cornering walls, each corner should not exceed five layers of bricks. When the disk angle is carefully controlled, the brick layer and the weigh bar of the leather bar should be carefully controlled to control the size of the ash seam to make the horizontal ash seam uniform.

Hanging line masonry composite insulation wall must be double-sided line. If several people on the longwall make a total line, there should be several branch points in the middle, and the small line should be tightened. Each layer of bricks should be threaded and flat to make horizontal seams uniform.

Bricklaying bricks to use full shop, full squeeze operation method. When laying bricks, be sure to follow the line, “the line with the line, with the next edge, left and right adjacent to the level of the horizontal mortar seam thickness and vertical mortar seam width is generally about 10mm, between 812mm is appropriate. Masonry mortar should follow After stirring, the cement mortar must be used within 3 hours, and the mortar must be used up within 4 hours, no overnight mortar is allowed. When the wall is masonry, it is forbidden to pour with water.

The remaining corners of the external walls and embedded reinforcing bars shall be built at the same time. The junction between the inner and outer walls must be slanted, and the mouth must be straight and smooth. When the partition wall and the column or the column are not laid at the same time, Yangshuo can be added to the embedded buckling rebar, that is, 2 concrete rebars are reserved for every 500mm along the wall height, and the buried length is counted from the remaining wall of the wall. Each side is not less than lOOOmrn end should bend 90* hook.

Placement of heat-retaining materials and pull-reinforced steel bars When the heat-insulating material is a plate-like material such as a polystyrene foam plate, it is advisable to use a method in which the total thickness of the laminate is constant (2 to 3 layers).

When the insulation material is rock wool and expanded perlite, a moisture barrier layer or moisture-proof treatment shall be provided. During the construction of the rainy season, it should be covered in a timely manner to prevent the insulation material from deteriorating the insulation performance due to moisture.

When placing insulation material, effective measures should be taken to prevent damage to the insulation material. It is advisable to set up double-row scaffolding.

The specifications, quantities, and positions and spacings of the tensioned bars in the wall should all meet the design requirements. They must not be misused, misplaced or leaked, and should be treated with anti-corrosion treatment.

3 Quality Standards and Control 3.1 Guarantee The variety and strength grade of the project brick must meet the design requirements.

Mortar strength should meet the design requirements, the average strength of the test block is not less than Ifm.k (standard block curing strength); the strength of any test block is not less than 0.75fm.k. Masonry mortar must be dense and full, horizontal gray The fullness of the mortar should be greater than 80%. It is strictly forbidden to stay at the corner of the wall.

The basic items of masonry are staggered up and down, brick columns and concrete bricks are constructed with no cores of bricks; windows or clean water walls have no seams, and each wall of mixed walls has no seams of 4 tiles.

Masonry joints have dense mortar joints, and the seams and bricks are straight. The thickness of the horizontal mortar seam is less than 5 mm or the number of translucent defects is not more than 5 at each joint location.

The number and length of pull ribs should meet the design requirements and construction specifications.

The position of the structural column is in the correct position. The gums of the horses retreat first and move backwards and forwards, and the residual mash is cleaned.

Allowable Deviations Project Allowable Deviations of Compound Heat Preservation Walls are shown in Table 1. Table 1 Allowable Deviations of Compound Insulation Walls Deviations Inspection Method Axis Positional Offset Using Theodolites or Cables and Rulers Measuring the Height of the Wall Top Leveling Levels and Measuring the Child Hanger for Each Layer 2m toe plate straight for full height measurement with theodolite or hanging wire and ruler for surface leveling water wall with 2m ruler and wedge degree mixed wall plug gauge for horizontal ash seam clean water wall straightness mixed wall for pulling 10m line, measured with ruler Horizontal mortar thickness thickness of soil 8 compared with the number bar, using the ruler (cumulative number of 10 tiles) measurement (above the nth page) to absorb advanced production technology and scientific management methods for the production of solar water heaters, will make China's overall technology to international Leading level, we can conclude that the era of quality and cheap Chinese solar water heater products occupy a considerable share in the international market will not be far off.

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