With the rapid development of national economy and the advancement of urbanization, there are more and more water sources construction and large-diameter buried water pipelines in various water supply industries, and the following internal corrosion problems in pipelines have also been put on the agenda. Traditional steel water pipes use ordinary cement mortar. After a period of use, the effect is not ideal, such as poor strength and adhesion, poor impermeability and crack resistance, which greatly shortens the service life of the pipeline. Based on the above situation, our company has extensively collected relevant technical data at home and abroad, and after up to ten tests a year, it has successfully developed Donghai brand pipeline lining anti-corrosion waterproof mortar with domestic leading level, which makes up for the inherent shortcomings of traditional materials and adds a new variety to the steel pipeline anti-corrosion industry.
This product is non-toxic, harmless, pollution-free, simple to operate, long in service life, low in friction coefficient and outstanding in anticorrosion and waterproof performance. It has passed the test of Beijing Quality and Technology Supervision and Inspection Center, and its performance exceeds the standard of CECS 10:89: 89, reaching the domestic leading level, creating a prerequisite for improving the internal corrosion protection of underground water pipelines in China.
First, the characteristics:
The modified material (1) is added to the anti-corrosion waterproof mortar of pipeline lining, which is not easy to crack.
(2) Changing the traditional river sand into quartz sand with optimized gradation has less silt content, high silicon content, strong corrosion resistance and high strength.
(3) Factory preparation, which solves the instability of raw materials prepared on site and the inaccuracy of proportioning, makes the proportioning more accurate and reasonable, and better ensures the original quality of materials.
(4) Mechanized construction is simple and convenient, and spray scraping is used for one-time molding, so that the overall seamless impermeability is high.
(5) The formed lining anticorrosion layer is compact and smooth, and the friction coefficient is small.
(6) Non-toxic, and can be used in drinking water engineering.
Scope of Application This product has a wide range of uses, and can be used for buried steel water pipes (domestic drinking water pipes, sewage pipes, seawater pipes, chemical plant wastewater pipes, sewage tanks) and so on. Moreover, this material is a powdery product, which is convenient for transportation and storage. It can be used after adding water and stirring, which brings great convenience to construction.
Third, the technical indicators of mortar fluidity 60-80mm compressive strength (28d) >; 50 MPa bending strength (28d)>6 MPa mortar impermeability (28d) >: 1.5 MPa high temperature resistance 100℃, low temperature resistance -40℃5h, 5h without abnormality.
Four, the construction of long-distance water pipelines should use mechanical spraying, elbows, tees and other special pipe fittings and pipe sections close to the valve can use manual spraying, and connect with the mechanical lining of smooth gradual change section.
During construction, when the pipe diameter is greater than 1000mm, manual spraying is allowed without mechanical spraying equipment, but it must be sprayed in layers.
Generally, the powder: water =1:0.126-0.13 (weight ratio) is mixed with water. The mixing water must be clean and must not contain substances that affect the quality of mortar lining, such as soil, oil, acid and alkaline organic matter. , so use drinking water.
For the pipeline with engineering diameter of 500-700, the coating thickness should be 8 mm; The spraying thickness of 700- 1000mm pipeline shall be10 mm; 1 100- 1500 pipeline coating thickness is12mm; 1600- 1800 pipeline coating thickness is14 mm; The spraying thickness of 2000-2200 pipeline is15 mm; The spraying thickness of 2400-2500 pipeline is16mm; The pipeline above 2600 is 18mm.
Verb (abbreviation of verb) Note: The construction of this material should be above 5℃. When the pipe diameter is below 1000, the fluidity of mortar is allowed to increase, but it should not be greater than 120. This material should be used before initial setting after mixing with water, but not after initial setting.
Before lining construction, the pipeline lining must be cleaned. For newly buried pipelines, loose scale, floating rust, dirt, grease, welding slag and other attachments should be removed. For old pipelines, rust, scale and other attachments should also be removed. After removing the attachments, rinse them with water. During lining construction, there should be no condensation and water accumulation on the inner wall of the pipeline. Check the deformation of the pipeline. The maximum vertical displacement should not be greater than the design value, and should not be greater than 2% of the pipe diameter. After the lining is finally set, it must be watered and maintained immediately.
Engineering application of intransitive verbs This product has been applied in companies such as Hong Kong Tsuen Wan, Hong Kong Dianmen, Guangzhou Water Supply Group, Beijing Water Supply Group and Shougang Pipe Industry. , and proved to be effective and favored by users.
Seven. conclusion
The application of anti-corrosion and waterproof mortar for pipeline lining produced by Donghai Company has been fully recognized in many projects, and it is agreed that the problem of short service life of ordinary mortar has been solved and a lot of comprehensive cost of pipeline has been saved. According to the calculation that the current water diversion project in China is more than 8,000 kilometers and the project diameter is 2,000, it can save huge capital expenditure for the country. Factory preparation not only ensures the quality, but also prevents the secondary dust pollution on the construction site, which is conducive to greening and beautifying the environment. At the same time, after the mortar is sprayed on the inner wall of the pipeline, a passive film is formed on the inner wall of the pipeline, which will not produce iron bacteria and make the surface bacteria unable to reproduce, effectively controlling the secondary pollution of the pipeline and the terrible chloroform, which is beneficial to the health of human drinking water, improving the strength and anti-violence coefficient and effectively reducing major engineering accidents. The friction coefficient is less than 0.0 1 1, and it will be smoother after long-term use, which will reduce the resistance and increase the energy, greatly save energy and produce huge social benefits.
The awareness of internal defense of underground pipelines in China is constantly strengthening, and more underground water pipelines need anti-corrosion treatment, which has a very broad prospect. Waterproof mortar for pipeline lining is an excellent variety of internal corrosion protection for water pipelines, which has been paid more and more attention and applied by municipal departments in China. At present, the demand for underground pipeline anticorrosion engineering in Beijing is about 1 10,000 tons. With the reconstruction and construction of various cities, the demand for this product will be even greater, and it will be the leading product for internal anticorrosion of steel water pipelines in the future.
For more information about project/service/procurement bidding, and to improve the winning rate, please click on the bottom of official website Customer Service for free consultation:/#/? source=bdzd