Shandong Jining cement pavement repair materials

Slim Patch cement pavement repair materials, rapid strong, comprehensive repair a radical, the most economical maintenance program; I. Introduction 1, the product uses concrete pavement repair materials specifically for cement concrete pavement pockmarked face, hollowing, peeling, Shelling, cracks, exposed tendons and other diseases for timely repair can be directly applied to the site of disease, has superior compressive and bonding strength, ultrathin repair, high-speed and high-pressure driving state does not appear broken and shedding phenomenon; all cement concrete surface diseases are applicable to this material. 2. Physical and chemical characteristics Physical state: gray powder, moisture absorption. Stability: long-term storage and under normal conditions of transport, no fire and explosion. . Shelf life: Best performance 3 months 2 Product performance 1, practical performance of the construction without complex construction machinery and technical requirements, without long closed to traffic, the construction can be open to traffic for two hours; no excavation of the site of disease, may save a lot of construction costs, material costs and maintenance time, effectively delay the diffusion path and the spread of disease, to extend road life; and after patching cement concrete pavement close to the original color, better aesthetics. 2, the use of the adhesive properties of the material itself and the surface energy bonding capacity principle, repair surface with the original concrete reaction into a unified whole, so as to form a high bond strength, two hours after application of the adhesive strength can be achieved 1.6Mka, can bonding parts with a variety of diseases, largely unaffected by the thickness of the impact of bonding capacity, enabling 1mm thin patch, in stretching, rolling, and other external force instead goes off, not broken. 3, durability and fast early performance reflects higher early strength and late does not decay for many diseases eradicated disposable parts can be done; the material itself has a strong waterproof, corrosion and UV resistance, its resistance aging capacity is more than five times the original cement concrete, performance degradation will not be earlier than the original concrete, not because of aging and loss of bonding capacity and compressive strength. 4, compression performance repair materials after curing have a very strong compressive and flexural ability, compressive strength of up to two hours 22Mka, rising late strength, compressive strength of up to 100Mpa above the peak of the disease have a good site reinforcing and supporting role, repair 3mm thickness can be achieved by compression of non-specific load requirements of the road, it will not be broken and off at high speed and high pressure driving state. Third, the technical indicators 1, the test report (see test report picture files) 2,2010 test data by the National Building Materials Testing Center School: No. Test items Results 1 Fluidity / mm initial flow of 338 30min fluidity 3202 compressive strength / Mpa 2h 22 5h 36 3 adhesive strength (3h) Mpa 1.6 4 free expansion (1d)% 0.012 3, feature comparison: Comparison of materials index bituminous and cement-based material resins, polyurethanes and rubber-like material rapidly solidified, strength cement and polymer cement mortar class I compressive strength of the concrete surface repair material in the lowest categories of material, is a kind of very primitive material when pouring used more. Although higher than the pitch-based, low elastic modulus, small reinforcing effect. High early strength, but later the strength of attenuation is large. 2 hours of compressive strength of up 22Mka, late strength does not decay, the site of the disease there is a strong reinforcement and support role. Adhesive properties of the adhesive performance will be affected by the thickness of the impact of the use, generally applied to the original height above the disease can. High initial bond strength, flexibility, adhesion is acceptable. Early bonding is acceptable but the thickness is less than 1cm when performance is poor. Late strength is lowered. Easy to break and fall off. 3 hours bonding strength can be achieved 1.6Mka, with a variety of diseases bonding site. Scalability can stretch itself too big, not blending with cement concrete. And original cement concrete road stretching ratio is closer, better adaptability. Shrinkage of greater shrinkage cracks easily after final setting. 1 day (complete final set after) the expansion rate is 0.012% free, no shrinkage phenomenon. Durability can easily be squeezed out or taken away in summer, winter, easy deficit, it needs regular construction. Fatigue resistance is not high, easily and reduce the durability is influenced by pressure, ultraviolet radiation and other factors. Poor durability, strength and therefore generally post-like material attenuation is large. Late strength does not decay, adhesive strength and other factors dictates, has a strong durability, it is basically a one-time cure for the disease. Heat during the construction process needs, clean up the foundation also have higher requirements, the construction process is more complicated. Higher cleaning requirements of the original foundation. More complex and requires the construction unit masterbatch and cement, and aggregates site with the construction, but difficult to master material ratio. Construction process is simple, add water and stir to spread on the area in the disease, and various types of diseases have a strong adaptability. Application cost is not very high material costs, but higher construction costs. Poor durability, short time they have to repair the second, lower price. The application of high cost, generally do not apply in a general way, most applications use at the airport and a bridge. Application costs are relatively modest, but poor durability, has not been widely used. Application cost is slightly higher than asphalt and clay-like material, but can be generally accepted road repair, because a permanent cure for the disease, an integrated high cost. Aesthetic appearance is poor, the construction of cement concrete pavement and the original color is inconsistent. And the original color of cement concrete pavement close better aesthetics. And the original color of cement concrete pavement close better aesthetics. And the original color of cement concrete pavement close, according to the original color of the material surface color adjustments to achieve better color compatibility. Fourth, Dosage 1, the basic requirements: 1.1 material used cement pavement repair materials, repair thickness of 1mm when needed materials about 1kg per square meter. 1.2 Water use pollution-free water (livestock drinking water). 1.3 Construction thickness 3mm or more appropriate. 1.4 Construction conditions: temperature should be above 5 ℃, rain not construction. 1.5 construction workers must have some experience of concrete construction, pre-construction to understand the use of this material. 1.6 Construction machinery: mortar mixer or hand mixing tool (hand drill modification), high-pressure water washing device, a bottom cleaning tool, sponge or mop (dry excess water use), two or more of iron mixing drum, several trowel . 2, the bottom surface treatment: (1) Cleanup: first from the loose part of the drum, peeling, cracks and other parts of the tick off, to below a level of 3mm, too flat parts and parts with oil to be roughed, brushed Methods specialized equipment or artificial nap with a sharp hammer percussion can be. (2) Cleaning: The underside of the surface dust and other debris cleaned, washed clean with high-pressure water, the mud should be washed out work surface and prevent reflux. (3) Hydra: water wash clean, the water should remain in the work surface for some time, the work surface fully run through until no seepage so far. 3, the deployment of materials: (1) water: the material and the amount of water to adjust the water mixing, add water when 17% of the best, but according to the repair of different parts, different time requirements for dilution, but the amount of water at 15 between% -20%. (2) Mixing: Stir shall stir when observed no dry ball and bubbles, if there are dry ball and bubbles, can still stirring after one minute, stirring time of 3 minutes or so, but it should not be too long to prevent the mixing barrel solidified. (3) Experience: According to experience, when stirred together with water before adding material will be more time-saving, because this material solidifies shorter, one-time amount of mixing is not too large, based on the work surface and the construction schedule, stirring every material should be Construction completed within 20 minutes. 4, the construction method: (1) timing: to be repaired face full run through, but no clear water surface moist, if potholes parts of water with a sponge or a dry cloth to dry after the construction of the water, if there is water It will destroy the material in order to affect the strength of the exchange of water; if the surface is too dry phenomenon occurs, then showered with a way to re-wetting; work surface helps to maintain proper humidity adhesion and ease of construction. (2) repair: (1) for the pits, pockmarked face, peeling, hollowing repair, the stirred material fell on work surface, smoothing with the trowel to the forward end of the trowel slightly lifted and ground into a 10 ° angle to minimize the number of times the material is spread flat, because there will be too many times back plate sticky board phenomenon, if there is usually hard to find, it is still two to three minutes before disappearing. Construction workers to preview what is best in a small area, look at the material characteristics further large-scale operation, constantly sum up experience and construction skills. (2) for the repair of cracks, if the crack is not applicable in this material is less than 3mm, you need to deal with the expanding cracks, expanding a relatively good repair surface operation, the adhesive material will be beneficial and reinforcing effect. (3) Experience: Many construction workers used to carry out concrete actions by the experience, according to experience, this construction materials and cement concrete there are differences, but there are similarities. The difference is that not as concrete as calendering, because this material is the initial setting time is shorter, there will be blocking resistance when the initial setting is not conducive to smooth, so as little as possible of the material can be used in the form of paving leveling; common is that this material is also required as part of the same concrete vibrators, paving material dense and uniform, so to avoid cavities and faults in the construction, especially at the bottom surface of the adhesive, it is best when paving thin scraping thin layer irregularities observed point has full access to the material immediately after the paving thickness required, if the pit is best to avoid large thickness portion of a one-time accumulation, filled with layered way to do dense uniform, However, this link is coherent carried no intervening space, otherwise there will be delamination. 5, health and traffic control repair is completed, the hand touching the surface after hardening, watering regimen can be carried out, but not with water under high pressure to prevent the surface of the slurry will affect the strength away, if excessive evaporation weather, to be covering health, no matter what way can keep moist state health more than two hours can be. Temperature is above 20 ℃, two to three hours to open traffic, the temperature is low, may be appropriate to extend the opening hours. Based on experience, the best health coverage, covering the available material bags, tree branches to make the best of things, try to create conditions for health coverage. If possible, try to extend the opening time traffic also helps improve the material properties. V. Benefit analysis of many concrete pavement diseases appear, if not promptly repair will soon develop into incurable diseases, and especially for some types of diseases pits pitted surface, there is no ideal solution, basically the development of other diseases to a certain degree and dig up the way, resulting in a lot of waste material, while the long closed to traffic costs more and more attention. Cement pavement repair materials can achieve ultra-thin patch, superior compressive and bonding strength and superior durability, timely repair parts for the disease without long closed to traffic. Actively promote and encourage the adoption of new technologies, the traditional road maintenance technology, then awareness materials to promote the application of new technology, new materials, a sense of urgency, a sense of mission, a sense of crisis, with a strong and leading a typical demonstration effect, concrete pavement repair materials application has a strong economic and social benefits.