Ready-mixed concrete has developed rapidly since its promotion in my country. Currently, the annual concrete production volume ranks first in the world. With the technological progress and vigorous promotion of domestic concrete transportation equipment (pump trucks, trailer pumps, and truck-mounted pumps), the concrete pumping technology gained popularity. However, most of the lubrication materials for concrete pump pipes still use cement mortar. That is, before pumping concrete, the mortar must be used to moisten and lubricate the inner wall of the pump pipe to lubricate the inner wall of the pump pipe to reduce the friction resistance of the pipe when pumping concrete and ensure that the pump The construction was carried out smoothly.
The mortar required for traditional pipe lubrication methods must be transported to the construction site by vehicle. In this way, every time the pump truck arrives at a new construction site, the mixing station requires a concrete mixer truck to specifically deliver pipe lubrication mortar. In order to save vehicles for transporting mortar, some concrete companies also use the method of “carrying” the mortar on the top of the mixer truck after loading the concrete. Although this method saves transportation trips, it often brings some negative consequences. Because, in order to prevent the mixing of mortar and concrete, the concrete transport truck with “backed” mortar cannot rotate during transportation. In addition, the vehicle bumps along the way, which will cause the concrete to stratify and segregate, that is, the stones will sink, and the mortar and cement will The slurry floats. On the one hand, the separated concrete mortar and pipe-lubricating mortar will mix, causing the actual mix ratio of the concrete to change; on the other hand, when this concrete is transported to the construction site, if it is not fully stirred and pumped into the project, it will cause shear walls and columns. The concrete structure is layered and there are few or even no stones in the upper part of the structure, which can lead to quality disputes or even accidents. In serious cases, it has to be dismantled and reworked. In addition, pipe moistening mortar is often poured into concrete structures, causing harm to concrete structures.
To sum up, the traditional pipe lubrication method has some shortcomings. It not only wastes raw materials such as mortar and mixing truck shift fees, but also causes high costs and quality problems.
Economic development has driven the development of the entire construction industry, and has also brought a broader market to our concrete industry. In the future, the demand for pumped concrete will also increase, and the demand for pumping technology will also increase. The requirements are getting higher and higher. With the advancement of pipe lubrication technology, a new type of environmentally friendly pump pipe lubrication material – pipe lubrication agent has emerged.
2 Polymer pipe moistening agent
The application principle of polymer pipe moistening agent is to simulate cement pipe moistening mortar, which requires the pipe moistening agent to have a certain viscosity so that the pipe moistening material can adhere On the inner wall of the pump pipe; the lubricating agent is also required to have good lubrication properties. When the concrete passes through the pump pipe, the resistance is as small as possible and slides along the pipe wall, making the concrete easy to pump. We often call it pipe moistening performance.
Easily soluble in water, its aqueous solution is viscous, has large surface tension and viscosity, can increase the slipperiness of water, and is not harmful to concrete quality, human health and the environment. Experiments have shown that it is The steel bars have no corrosion effect.
Its use is as follows:
①. Inspection before pumping: Check whether the hopper and delivery pump pipe of the concrete delivery equipment (pump truck, trailer pump, truck-mounted concrete delivery pump) are in good condition Slurry leakage; the hose at the front end of the pump pipe should sag naturally; there should be no residue or water accumulation in the pump pipe; pay special attention to the fact that when starting pumping, the hose at the front end of the pump pipe must be in a natural sagging state. Can be moved laterally.
②. Dosage: Use 1 bag for a pump tube length of 50m, add 20-25kg of water; use 2 bags for a pump tube length of 51-100m, add 40-50kg of water; and so on.
③. Before use, slowly pour this product into a plastic container filled with water and stir while pouring. The stirring time is about 5 to 10 minutes until it is fully dissolved. Let it stand for a while until the solution is dissolved. After it becomes viscous, use the stirring rod to pull out a long thread, which can then be poured into the hopper of the concrete delivery pump; then you can start pumping the solution; when a small amount of solution remains in the hopper, the concrete tanker truck begins to deliver the concrete. The material is slowly discharged into the pump hopper without stopping the pump; after being opened, the material can be discharged and pumped normally.
④. This product is non-toxic and odorless. If it comes into contact with the skin or splashes into the eyes, just rinse with water. </p
微信扫一扫打赏
