Abstract: the construction technology of waterproof layer of cement mortar
Based on standard
Unified standard for construction quality acceptance of building engineering GB50300-2001
Code for acceptance of construction quality of building foundation GB50202-2002
"Technical code for waterproofing of underground engineering" GB50108-2001
"Code for acceptance of construction quality of underground waterproof Engineering" GB50208-2002
1, range
This technology is applicable to underground masonry structure basement, pool and other engineering waterproof layer and waterproof concrete structure additional waterproof layer, waterproof construction technology of rigid construction under the condition of damp.
2, construction preparation
2.1 material requirements and main equipment
2.1.1 cement should be used: 32 Shenzhen Huasheng waterproof material.5 ordinary portland cement, or more, can also be used slag Portland cement, has the effect of corrosive medium, should be chosen according to design requirements.
2.1.2 sand: in the sand, not containing debris. Mud content must not exceed 3%, before the use of 3-5mm pore size of the screen must be.
2.1.3: waterproofpowder waterproof, oil additives, also can use silicone waterproofing agent, metal chloride salts waterproof agent, should be used correctly according to the product specification.
2.1.4 main equipment: ash board, iron trowel, corner trowel, half barrels, wire brush, soft brush, eight by foot, head pointed chisel, twist, chisel shovel, broom, wood trowel, scraping bars etc..
2.2 operating conditions
2.2.1 structure acceptance, has run the approval procedures.
2.2.2 waterproof construction during the underground drainage, until the completion of the waterproof project. Drainage and precipitation measures should be implemented according to the construction plan.
2.2.3 basement door window, set aside holes, pipes and other details of the import and export processing is completed.
3, operation technology
3.1 process flow
The wall and ground base treatment -- brush cement - wiping brush - bottom mortar cement mortar precausions - cement mortar layer - brush - curing
3.2 basic treatment
3.2.1 concrete wall as honeycomb and loose concrete to tick off, water washed clean, and then use 1:3 cement mortar or cement mortar with 1:2 dry hard twist. Scrub clean surface oil using 10% caustic soda solution, the concrete surface should be cut hair.
3.2.2 with waterproof brick, brick row must be in the seam, the depth is 10-12mm. Through the embedded pipe exposed in the surrounding grass, tick into 20-30mm wide 50-60mm deep groove with 1:2 cement mortar twist dry solid. The pipeline wall waterproof should be done according to the design requirements, and handle the inspection procedures implicit.
3.3 concrete wall with cement mortar waterproof layer
3.3.1 brush: cement mixture ratio of cement, water, oil and water =1:0.8:0.025 (weight ratio), the cement / water mix, then add water oil mixing, use soft brush evenly in the coating surface of the base, then wipe the bottom waterproof mortar.
3.3.2 wipe the bottom mortar, with 1:2.5 cement mortar, cement heavy 3%-5% waterproof powder, water cement ratio of 0.6:0.65, the consistency of 7-8cm. The first waterproof powder and cement sand mix, then add water mixing. After stirring plastering, bottom ash plastering thickness is 5-10mm, before the ash solidification with brooms. Mortar to be mixed with the use of. Mixing and mortar should not exceed 60min time, prohibited the use of mortar.