Standard construction method of concrete hollow brick
  (A) construction preparation:
  1, concrete hollow brick construction materials:
 (1) Brick: Brick varieties, strength class must meet the design requirements and specifications shall be consistent with the compliance certification and testing factory orders.
 (2) Cement: Masonry variety and grade should be based on the site and choose their environment, the general should adopt No. 325 ordinary portland cement or slag cement; should be pre-qualified to prove, and test reports before Zhunyongzheng Use; different varieties of cement shall not be mixed.
 (3) sand: sand should be used. Preparation of cement mortar or cement mortar mixing intensity level equal to or greater than M7.5, sand clay content should not exceed 5%; when the intensity level is less than the M5, sand clay content should not exceed 10%.
 (4) Water: should be used to clean water free of harmful substances.
 (5) Admixture:
     1) lime paste: curing time of less than seven days, prohibited the use of dehydrated lime plaster hardened.
     2) Other admixtures: Electric gypsum, fly ash and other content should be decided by laboratory tests.
 (6) Other materials: Rachel steel, embedded parts, wood tiles, waterproof powder shall meet the design requirements.
 (B) Operation process:
      1, mixing mortar:
 Mortar with mechanical mixing, the material on trolleys, weighing scales of measurement. Tic-Tac-frame transport of materials used mainly for vertical transportation, labor trolley for horizontal transport.
(1) provided in accordance with mortar ratio test weighing ingredients, cement batching precision controlled within ± 2%; sand, lime paste ingredients precision controlled within ± 5%.
(2) mechanical mixing mortar should be used, the order should be cast feeding sand, cement and water after admixture. Feeding time since completion date, not less than 1.5min.
(3) with the use of mortar should be mixed with water mud and cement were mixed mortar must be used up within three hours and four hours after Bancheng.
      2, group method:
(1) brick masonry joints should be down wrong, both inside and outside the ride puzzle, gray seam straight, full of mortar, mortar joint thickness of horizontal and vertical mortar joint widths are 10mm, but not less than 8mm, should not be greater than 12mm.
(2) the corner of the brick wall and the junction should also masonry, lap joints should be wrong, all connected to each other in the infill walls, and corner joints with concrete walls along the wall height should be set 2 ¢ 6 @ 600 long pass Rachel tendons. You can not but be of masonry indwelling presence of breaks should be piled raft ramp and additional tie bar, tie bar number per 12cm thick and reinforced with a diameter of 6mm original placement, spacing along the wall height must not more than 50cm, length from the wall to remain buried at Cha counting, each side should not be less than 50cm, the end should be 90 ° hook.
Note: The temporary break in seismic areas of the building can not remain straight Croucher.
(3) walls and infill walls in contact with the top surface of the upper structure of the stand by the side of brick or masonry brick ramp tight squeeze.
      3, brick masonry:
Construction sequence: planning bomb plane line inspection post, the wall must be left aside link bars filled masonry over the top of the doors and windows installed or cast masonry beams.
(1) leave the bottom row of tiles (dry brick-like swing): When the first skin brick facades generally leave at the end, cross the small brick wall should be drained, posterior longitudinal rows along the brick wall should be. According to the pop-up window openings have ink lines, check the doors and windows of the interval between the walls, with wall studs (crib) the length of the row of brick mold meets the size, when should the sub-module, will have to consider the good tiles and cut emissions plan. Cut small brick or tile should be ranked in the middle of the window, with wall studs (crib) or other obvious next site.
(2) Select the brick: Select edges neat, no bending crack, basically the same size bricks.
(3) plate angle: drywall preceded wheel angle, the angle of each wheel angle brick masonry should not exceed five skins, and shall promptly be hanging by, if found in time bias trimming. To carefully control the disk angular brick layers and the number of skin stem elevation, control mortar joint size, the horizontal mortar joints uniform. Every corner masonry should check the disk, flat and vertical fully meet the requirements before they can hang drywall knot.
(4) hung: thick brick masonry and below, the use of single-sided hanging wire; laying a brick and a half thick and above, must be double-hung. If several simultaneous long masonry wall shared a pass line should be located in the middle of several branch points; small taut straight line to each threading leather tiles should look flat, horizontal joints uniform, straight smooth.
(5) Bricklaying: Bricklayer squeeze pulp method should be used, or the use of thirty-one bricklaying method. Operating essentials Trinity bricklaying law is a shovel ash, a brick, a squeeze rub and scrape readily extruded mortar. Operation bricks should be flat, with the line, masonry during the operation to take the seam segment control and chaos tour Ding seam. Often self-test, if there is deviation should be corrected at any time, prohibited the use of hit brick corrected afterwards. Should vary with the slurry overflow gray masonry brick track surface scrape.
(6) wooden bricks embedded: wooden tiles should be embalmed, when embedded head out, including bulk quantity determined by the height of the hole; hole height of 1.2m or less who put two on each side, height 2 ~ 3m who put four on each side. Wood bricks embedded in the hole and down the four parts of the general discrimination brick at the beginning, middle evenly distributed. After considering installing window and door openings reserved for door frames, door and window openings should pay attention to the width and elevation meet the design requirements.
(7) When the entrance door and window lintels L0 <800, the use of reinforced brick lintels, when L0 ≥ 800, the use of precast reinforced concrete lintels on the brick wall bearing length of not less than 240; length when there is insufficient support should by lintels and columns, walls direct connection handling. When no side windows hole brick piers hold lintels, using concrete wall in the corresponding position of the roof, the column to be buried iron or dowels to the lintel and welded steel.
Lintel installed base elevation, location and type must meet the requirements of design drawings, sitting pulp plump; such as sitting pulp thickness exceeds 200mm, use fine aggregate concrete bedding, stretching lintel bearing length should be the same at both ends.
(8) is filled wall to wall height ≥ 4 meters, the 190 wall, filled with wall to wall ≥ 3 meters high, set in-situ reinforced concrete reinforced with a 120 in the middle of a thick wall or doorway catchy elevation at both ends reinforcement steel lap shear wall with columns or set aside, the section height and reinforcement of the hole should be at the lintel requirements. Specifically detailed architectural description.
(9) Fill the top of the wall and slab transfer of solid brick with a small block and ramp puzzle top tight.
(10) hollow block masonry hole in the side doors and within 200mm M5 should not be less than the C15 fine stone masonry mortar or concrete block infill holes. Windowsill at the masonry block with blind holes and additional reinforced concrete sill plate and laying 2Φ6 reinforcement. Doors and roof if masonry, lintels should be added, reinforced concrete lintel lintel lintel reinforcement and specifications detailed design of specific requirements. Specifically detailed drawings bulk sample.
(11) In addition to brick masonry meet the design requirements, and construction should meet its node Shenzhen "non-load-bearing concrete block masonry walls technical regulations" (SJG-1997) requirements. Hollow block masonry doors 200mm hole in the side should not be less than the M5 C15 fine stone masonry mortar or concrete block infill holes. Windowsill at the masonry block with blind holes and additional reinforced concrete sill plate and laying 2Φ6 reinforcement. Doors and roof if masonry, lintels should be added, reinforced concrete lintel lintel lintel reinforcement and specifications detailed design of specific requirements. Specifically detailed drawings bulk sample.
(C) Quality Standard:
      1, to ensure the project:
(1) brick varieties, strength class must meet the design requirements.
(2) mortar varieties meet the design requirements, the intensity must meet the following requirements:
    (1) of the same species, the average intensity of the same strength grade mortar test block in each group is not less than 1.0k;
    (2) any group of the strength of the test piece is not less than 0.75k.
    (3) must be dense and full masonry mortar, mortar, bricks plumpness levels of gray masonry joints less than 20%.
(3) the non-left corner of the exterior wall straight Croucher, other temporary break in, leaving Cha construction practices must conform to norms.