The Reasons of Concrete Pump’s Plugging
Home News

Industry News

The Reasons of Concrete Pump’s Plugging
Aug 31, 2020 Page Views: Author: Hamac Machinery Font Size: S M L
Theoretically, the blockage is most likely to occur when three large stones meet in the same section, and the section is mostly occupied by stones, and the flowable area is small. Generally, the maximum particle size of the stone and the inner diameter of the pipe d: D<1:3 (Note: This item is specified in the Regulations, according to the conveying height and the type of stone, 1:2.5 to 1:5), and is in the pump A square grid is arranged on the machine hopper to prevent the super-path stone from being mixed in. In the concrete mixture with poor ratio of concrete and poor concrete, the water will penetrate through the aggregate gap, causing the aggregate to coalesce and cause the pipe to block. It often occurs in the pipeline bending, reducing diameter and the middle of the pipeline. In addition, when the concrete water-cement ratio is too large, it is easy to isolate, causing the mortar to separate from the aggregate and blocking the pipe. It is more common in the "segregation" blockage of the long-distance horizontal pumping and the lower end of the vertical downward pipe.




When the amount of cement used is too small and the sand ratio is too low, the workability of concrete is poor, the deformation is difficult, the frictional resistance in the pipeline is increased, and the pipe is easily blocked. When the concrete slump is too low (below 80 mm), the pumping resistance is significantly increased, making pumping impossible. The particle size of the sand is unreasonable. When the content of fine sand passing through the 0.315mm mesh hole is small, even if other technical specifications of the concrete meet the requirements, the pipe will be blocked. Because these fine sands play a ball-like role in concrete, it can reduce the friction between the pipe wall and the concrete, improve the flow ability of the concrete, increase the cohesive force and water retention, and have a great influence on the pump ability of the concrete. Therefore, Therefore, in JGJ/T10-95 "Technical Regulations for Concrete Pumping Construction", the sand passing through the 0.315mm sieve hole should not be less than 15%.

schwing concrete pump trucks for sale

boom concrete

concrete trailer pump for sale

concrete pump for sale

Friction Concrete Mixer

JS500 concrete mixer and pumping truck

concrete distributor booms

truck mounted concrete boom pump

The Reasons of Concrete Pump’s Plugging
Do you want to know more about the product ?
Latest News
More
Mar 17, 2015
Fully automatic concrete mixing plant well reduces labor amount in construction project, and more humanized designs are added in terms of using this kind of concrete mixing plant. Then, how do we rightly operate fully automatic concrete mixing plant? Which requirements should be met for operators? The so-called full automation of concrete mixing plant means that all devices such as transporting system, batching system, mixing system and discharging system can be controlled by a computer. First of all, aggregate concrete batching is transported by belt conveyor. The pump and fly ash are transmitted by screw conveyor to be weighed. Then, in the operation process of fully automatic concrete mixing plant, water and additives are weighed by electric scale. All needed concrete materials are weighed by electric scale and made a ratio according to design process. The main concrete mixer is adjusted according the materials. When production combination starts and the materials are mixed evenly,
Jan 13, 2015
Currently, the strength of common used concrete is 20一40 n/mm. It is not difficult to produce the concrete of 80一100 N/mm if necessary. In order to lighten self-weight, concrete with light weight but high strength gets big development. Due to the continuous improvement of material strength, the application scope reinforced concrete and prestressed concrete is expanding. In recent 30 years, reinforced concrete and prestressed concrete have achieved remarkable development in long-span structure and high-rise building structure. For instance, Germany builds a roof beam of hangar with scope of 90m by adopting prestressed lightweight concrete; the scope of bridge in Japan reaches 239 m. During this period, design theory also has new development. Since the 1970s, structural reliability theory has gradually stepped into the stage of engineering practical on the basis of mathematical statistics, which makes the limit design method more improved and scientific. In the meantime, structure
Related Products
More
Services
Product quality is life, and considerate services are motive power. We are committed to providing timely, rapid, and efficient services for each of our customers.
About HAMAC
HAMAC can provide you with the consulting service, export agent service, Chinese product searching service and so on. Hope we can have a long-term cooperation and build a good relationship in the future.
Innovation
If you are interested in our company or products, welcome to visit our company or local offices; you can also get contact with us through online consulting, demand table submission, e-mails and telephones. Our staff shall wholeheartedly provide product information, application knowledge and good service for you.
A world leader in concrete machinery and Batching equipment in the construction industry
Copyright © 1981-2020 Zhengzhou Hamac Automation Equipment Co., Ltd.
Online
Email
Submit