Back stick rubber waterstop has two standards, one is with a hole in the center and the other is without a hole in the center. EP type back stick rubber waterstop refers to back stick central nonporous rubber waterstop, which is used in expansion joints and trigger joints of structures. EB type back stick rubber waterstop refers to the back stick rubber waterstop with holes in the center. They belong to the back stick rubber waterstop.
The price advantage of EP type back sticking waterstop is simple device, which creates conditions for improving the waterproof effect of construction joints; The major problem of back sticking waterstop is that it is not easy to compact around the tunnel top; Secondly, it is set around the tunnel. When the surrounding area is uneven or the tunnel roof is empty due to over excavation, the length of the waterstop changes with the surrounding conditions, and it cannot be processed at a fixed length. This may be the time to add the central joint of the waterstop.
Precautions for back stick waterstop manufacturer: during construction, because there are many sharp stones and sharp steel bars in the concrete, attention should be paid to the impact of pouring and tamping when pouring and positioning the waterstop to avoid puncturing the rubber waterstop due to excessive force. If cracks are found, they should be repaired in time, otherwise the ability of the rubber waterstop to resist external forces will be greatly reduced when the joints are deformed and subjected to water pressure.
When fixing the back stick waterstop, holes can only be punched on the allowed part of the waterstop, and the part of the body shall not be damaged. When positioning the rubber waterstop, be sure to keep it flat at the interface, let alone allow the waterstop to roll and kink. If any kink is found, it should be adjusted in time. When pouring and fixing the waterstop, it is necessary to avoid the deviation of the waterstop and the unilateral shortening, which will affect the waterstop effect.
Many friends should know that geotextile has a wide range of applications. After all, geotextile is a kind of geosynthetic material with good anti-seepage effect. The geotextile is spread on the slope surface that needs anti-seepage treatment, on which sand cushion and concrete are spread. The concrete of the top sealing layer of the embankment top forms a completely closed anti-seepage system. However, there are still many friends who have questions about whether geotextiles are applicable in harsh environments?
First of all, because the geotextile is made of polymer materials and the production process is added with an aging relieving agent, it can be used in unconventional temperature environments. It is often used for anti-seepage treatment of dams, drainage ditches, and anti pollution treatment of waste yards. The physical and mechanical performance indicators such as tensile strength, tear resistance and bursting resistance are high and have good anti-seepage effect. The geotextile is spread on the slope surface that needs anti-seepage treatment, and the sand cushion and concrete are spread on it. The concrete of the top sealing layer of the embankment top forms an overall and completely closed anti-seepage system.
Secondly, geotextile products are characterized by high strength, good extensibility, large deformation modulus, acid and alkali resistance, corrosion resistance, aging resistance, and good anti-seepage performance. It can meet the needs of civil engineering such as seepage prevention, isolation, reinforcement, crack prevention and reinforcement in water conservancy, municipal administration, construction, transportation, subway, tunnel and engineering construction.
After that, the thickness of the intermediate anti-seepage membrane of the geotextile should not be less than 0.25mm. If it is too thin, pores may occur, and it is easy to be damaged during construction, thus reducing the anti-seepage effect of the geotextile. During the construction of geotextile, special attention shall be paid to ensure that the laying is not too tight, not wrinkled, and the splicing is firm. The welding technicians of the Construction Department shall construct in strict accordance with the technical specifications, and control the five quality checks of preparation, laying, splicing, inspection and backfilling.
It should also be noted that the joint treatment of geotextile is a key process, which can directly affect the seepage control effect. At the beginning of joint treatment, it shall be noted that there shall be no dust, grease and moisture at the joints to ensure that the joints are clean.
Above is our detailed introduction to the question of whether geotextiles are applicable in harsh environments. To sum up, geotextiles have high strength, strong puncture resistance, acid and alkali resistance, corrosion resistance, microorganism resistance and aging resistance. It has excellent water permeability, filtration, soil conservation, isolation, drainage filtration and protection
Post buried waterstop is a kind of waterstop product mainly used in concrete deformation joints, expansion joints and other concrete interior, which has the ability to adapt to concrete expansion and deformation with rubber material elasticity and structural form. This product uses the high elasticity and compression deformation of rubber to produce elastic deformation under various loads, so as to play a tight seal to effectively prevent water leakage and seepage of building components, and play a shock absorption and buffer role, which can ensure the service life of engineering buildings.
Construction method and process of post buried waterstop:
In the new project, the groove shall be reserved when the concrete structure is being warped. When repairing the project with water leakage in the deformation gap, the inverted wedge groove shall be chiseled along the water leakage gap. The leakage gap in the groove can be repaired and plugged according to the method of repairing the leakage; The groove can be cleaned according to the requirements of the base treatment in the rigid waterproof plastering technology, and the rigid waterproof layer can be applied. In order to improve the bonding ability between the waterstop and the structure, the surface of the waterproof layer in the groove shall be swept into a pitted surface, and the surface shall be roughened with wood before the waterstop is laid.
After the strength of the waterproof layer increases (generally every other day), a layer of plain ash shall be applied to the bottom of the groove. At the same time, house ash shall be applied to the inner surface of the cut waterstop, which shall be repeatedly brushed with a wire brush. After that, the waterstop shall be placed in the concave case, and pressed from the middle to both sides to pave tightly. After paving, immediately apply another layer of mortar (2M thick) on the surface of the waterstop and the groove wall, erect a wood wool board on the waterstop ring along the gap direction, and then lay concrete around the groove to cover the rubber waterstop.
