The First, the basic treatment
1. new concrete foundation treatment
① basic requirements: a new concrete base to ensure the normal strength of civil concrete construction, flatness 3m straightedge error of ≤ 3mm, generally horizontal drainage slope ≤ 8 ‰, vertical ≤ 2 ‰, concrete casting must be water conservation, not less than 7 days, with a total curing period of not less than 28 days.
② expansion joints processing: the cast of the new concrete base must be cut a reasonable temperature expansion joints, the principle of not greater than 6 × 10m for a box cutting temperature joint must be cut, molded construction plates, the temperature width of 5 to 8 mm in slit depth of not less than 20 mm, the concrete thickness is more than 150 mm thick, the underlying seam depth shall be not less than 30 mm in order to ensure that the basis of thermal expansion and contraction does not lead to the cracking of the basis of other places.
③ cleaning the surface of the base: water wetting the base surface, and then about 8% of the dilute hydrochloric acid spill and wash the base surface, then rinse with water, and the circle to draw water at the base surface, after cleaning and drying should be no white powder compounds and floating loose material.
④caulking processing: When the basis of dry, add the brushing of black rubber or black rubber powder, with a special sealant temperature expansion joints on both sides, exposing the base surface part of the portable mill grinding to the flat with the base surface.
2. old cement concrete foundation
① basic requirements: the basis of the requirements of a solid, flat, without sinking plate, fracture width of not exceeding 10mm wide. Off of wide cracks, needs special sealant plus quartz powder (or black rubber powder) 1:0.5 (by weight) on the gap fill.
② clean the base surface: the surface with water and moist base about 8% diluted hydrochloric acid spill and wash the base surface, then rinse clean reactants, after cleaning the base surface should be free of waste oil, dirt and floating loose material.
③ expansion joints and cracks in treatment: the basis of the original cut to a reasonable temperature seam, must be re-cut; original cracks ≥ 3mm, 6 ~ 8mm wide and must be cut along the crack, then a new concrete foundation caulk approach; if cracks <3mm required to crack polished into "v" groove, surface width ≥ 20mm deep 2mm, then special sealant and rubber powder or thin black rubber filled.
3.asphalt base
① the density of> 95% (medium-sized rolling machine pressure after, no significant wheel track, no weak from the skin, no waves and other phenomena), error ≤ 3mm flat requirements 3m straightedge, drainage slope requirements horizontal <8 ‰, vertical <2 ‰, a new foundation for the conservation of not less than 28 days, the volatile low boiling point components in the asphalt, pitch material basis sufficient bond strength of the asphalt base strength.
② with dedicated asphalt-based surface treatment plastic plus talc or ground calcium carbonate 1:0.5 (weight ratio), gray knife scrape the filled surface voids.
③ water at the repair: (accumulation of water in accordance with the new concrete repair method of construction).
The Second, the silicon PU material laying
1.silicon primer construction
① brushing primer: roll coating at the surface of the base silicon PU primer dry basis with, usually divided into two roller coating, the basis of low density to be multi-channel roll coating, in principle, the formation of bright continuous film base surface after brushing until . Should be avoided under the hot sun or base surface temperature is too high (> 50 ° C) the case of construction, to ensure that the primer dry slowly to have sufficient permeability.
Plus quartz powder (or black rubber powder) 1:0.5 (by weight)
② water at the buffer layer rubber Stir construction, coated with plastic scraper to scrape the catchments; water depth more than 2 mm place, the application of these materials with multiple construction, a construction more than 2mm or more, there will be bubbles. When trimming patch, do not let the higher side after repair, if it has to be polished after the formation of higher order to the buffer layer construction.
2.buffer layer construction
Buffer layer before construction should be carefully examined to confirm the basis of processing finished due to the construction of the buffer layer. Buffer layer for the one-component material, coated with tooth scraper to scrape the basal plane, each scratch coating thickness can not exceed 1 mm, each coated with a scratch time interval before a dry subject (usually about 10 hours, depending on scene weather The case may be) until coated blown the required thickness. Tu scraping to pay attention to the leveling effect, to ensure that the surface leveling. If the temperature is low (<10 ° C) and low humidity (<50%) and adding special additives to make time to dry. Construction should be avoided in the hot sun. Buffer layer to dry, the water law test surface flatness of the water at the buffer layer rubber patch formation. Surface of granular debris mixed or accumulation at the required mill trim levels in order to strengthen the layer construction.
3. enhancement layer
Strengthen the layer of water curing materials, the construction of each packaging unit that needs to increase the scale of the special measuring cup water, water and rubber stir evenly, construction coated with tooth scraper to scrape the surface of the buffer layer, the dry solid surface should be smooth smooth, mixed with debris during the construction process or grievance office is required to trim flat to the surface construction.
4. the surface layer
The surface layer of the two-component materials must be prescribed proportion of A and B groups were fully Stir specific ratio of A and B components please refer to the detailed description of the drums. Can add a little water to adjust the appropriate construction of consistency, with a special drum roll coating to strengthen the surface layer. Surface in need of the three roll coating construction, the first pass and second pass must be added to the amount of B material 12% of the surface layer of special sand, should be the first A and Group B mixing uniform after the special sand Stir well and then roll coating the rollers each sticky material must be in contact with the barrel end to ensure that the special sand surface to bring out the third time during the construction and special sand. A B surface construction materials used must be sufficient, otherwise it will directly affect the results and the period of use. Should avoid the hot sun and high surface temperatures under construction, to ensure that the surface effect.
5 crossed
In accordance with the standard size measure positioning mark the boundaries of the location, textured paper posted on the pitch along the boundary on both sides, brushing with a special marking paint between textured paper until the surface is dry, tear textured paper. Marking paint for the one-component materials, two brushing.
The Third, pay attention
1.Construction of the whole process, every process within 8-9 hours after the construction not immersed in water;
2. construction of the indoor venues to ensure good ventilation;
3. After the laying of the venue need to maintain more than five days to put into use.
4.This program is the reference scenario, the construction site of the diversity and complexity of the specific construction site construction program will be changed, the reference program changes to the company by telephone or in writing, notify the other party.
