搜索历史清除全部记录
- All
- Product Management
- News
- Introduction
- Enterprise outlets
- FAQ
- Enterprise Video
- Enterprise Atlas
Guideline for Adjusting Parameters of Truck-Mounted Concrete Pumps When Pumping Concrete of Different Grades
Release time:
2026-08-03
Source:
Author:
Summary:
In concrete pumping operations, different strength grades (such as C30、C40、C50 Concrete of different types—such as those with varying material mix proportions, paste-to-aggregate ratios, and flow characteristics—places distinct demands on the operating parameters of pumping equipment. Scientifically optimizing the working parameters of truck-mounted pumps is essential for ensuring efficient pumping, preventing pipe blockages, and maintaining construction quality. Such adjustments must take into account concrete properties, pipeline conditions, and equipment performance, adhering to principles of systematicity and precision.
I. Understanding the Pumping Characteristics of Concrete with Different Grades
Concrete grade primarily reflects its compressive strength and is typically determined by the water‑cement ratio, the amount of cementitious materials, and the aggregate gradation. In general, as the grade increases (and strength rises), concrete’s cohesiveness tends to improve, while its workability may decrease accordingly.
Medium- and low-grade concrete (such as C25-C35 ): Typically, the dosage of cementitious materials is moderate, the slump is easy to control, pumpability is good, and resistance to the pumping system is relatively low.
High-grade concrete (such as C40 (And above): To achieve high strength, a lower water-to-cement ratio, a higher dosage of cementitious materials, and a more optimized aggregate gradation are typically employed. The resulting fresh concrete usually exhibits high viscosity, strong cohesion, and increased flow resistance, requiring greater pumping pressure to overcome friction within the pipeline.
Therefore, the core adjustment strategy for pumping is as follows: when pumping low‑grade, highly flowable concrete, priority should be given to maintaining its stability and preventing segregation; when pumping high‑grade, highly viscous concrete, sufficient and steady pumping pressure must be provided to overcome its flow resistance.
II. Targeted Adjustment of Key Onboard Pump Parameters
The main adjustable parameters of a truck-mounted pump include pumping pressure, pumping flow rate (speed), and engine speed; these parameters are interrelated and must be adjusted in coordination.
1. Coordinated Adjustment of Pumping Pressure and Displacement
Pumping high‑grade concrete: Due to its high internal frictional resistance, the pump’s operating mode should be adjusted to… “ High pressure, low displacement ” Condition. Higher pumping pressure effectively drives viscous concrete forward, while a lower displacement rate (piston stroke frequency) slows the concrete’s flow velocity within the pipeline, providing more time for propulsion and preventing blockages caused by pressure fluctuations or intermittent delivery. At the same time, a lower displacement rate also helps reduce impact loads on the equipment’s hydraulic system.
Pumping low-grade concrete: can be selected “ Medium and low pressure, relatively high displacement ” Mode. At this stage, the concrete exhibits good workability, with the primary challenge being to maintain its homogeneity. A steady, moderate pumping pressure combined with an appropriately adjusted flow rate ensures efficient delivery while preventing excessive pressure or overly rapid flow rates from exacerbating any existing tendency toward slight segregation.
2. Matching of engine speed (power output)
The engine speed directly determines the hydraulic pump’s flow rate and output power. When pumping high‑grade concrete, the engine’s set speed should be appropriately increased to provide the hydraulic system with a more robust power reserve, ensuring that power remains sufficient under high‑pressure demands. Conversely, when pumping low‑grade concrete, the engine speed can be slightly reduced—while still meeting pressure and displacement requirements—to help lower fuel consumption and equipment wear, thereby achieving economical operation.
3.S Regulation of the Valve‑Switching and Mixing System
For high-grade concrete, the curing time may be appropriately extended. S Adjust the switching interval or reduce the switching speed of the valve to minimize the instantaneous impact on the viscous concrete, allowing sufficient time for the concrete in the hopper to flow into the delivery cylinder.
Ensure that the mixing blades in the hopper operate continuously and effectively to prevent high‑grade concrete from settling or bleeding prematurely in the hopper, thereby maintaining consistent material delivery.
III. Systematic Operation and Coordination with Operating Conditions
Parameter adjustments must not be made in isolation; they must be closely coordinated with the concrete’s condition and the pipeline’s operating parameters.
1. Verification and Preparation Before Pumping: Regardless of the concrete grade, thorough pipeline lubrication is mandatory prior to pumping. For high‑grade concrete, the consistency of the lubricating mortar may be slightly increased to ensure an effective lubrication layer. During the first pumping operation, it is essential to perform… “ Slow start ” Procedure: After confirming that the concrete flows smoothly through the pipeline, gradually adjust to the target pressure and flow rate.
2. Dynamic monitoring and fine-tuning during the process: Operators must closely track real-time changes in the main system pressure gauge. When pumping high‑grade concrete, operating pressure may be set at a higher level, but operators should remain vigilant for sudden, unanticipated pressure spikes—signs of pipe blockage. When pumping low‑grade concrete, attention should be paid to abnormally low pressure, which may indicate segregation or air entrainment. Based on pressure feedback and on‑site observations, make small, incremental adjustments to the pump displacement to maintain stable pressure.
3. Management of Supporting Operating Conditions:
Ensure continuous material supply: Prevent air suction during pumping caused by interruptions in feed, which can disrupt the piston‑flow regime of concrete within the pipeline—this is critical for concrete of any grade.
Optimize pipeline layout: When pumping high‑grade concrete, it is especially important to simplify the pipeline configuration, reduce the number of bends, and use large‑radius bends to minimize pipeline resistance.
Summary
When pumping concrete of different grades, adjusting the parameters of the truck-mounted pump is essentially a process of precisely matching the equipment’s output power and conveying rhythm to the concrete’s rheological properties. At its core, this involves: for high‑grade concrete… “ High-viscosity resistance ” Characteristics, adopted “ High pressure, low speed ” a prudent advancement strategy; for low-grade concrete “ Easily fluid ” Characteristics, adopted “ Stable voltage at medium speed ” An optimized delivery strategy. Successful adjustments hinge on accurate assessment of concrete properties, proficient control of equipment parameters, and continuous monitoring and dynamic optimization throughout the entire construction process. Through such meticulous operations, pipe blockages can be effectively prevented, pumping efficiency can be enhanced, and high-quality placement can be ensured for concrete structures meeting diverse strength requirements.
RELATED INFORMATION
Contact Us
Changsha Base:Hunan Zenxon Heavy Industry Technology Co., Ltd.
Address: Jinrong Tongxin International Industrial Park, Changsha High-tech Zone
Loudi Base:Hunan Haoda Heavy Industry Technology Co., Ltd.
Address: Loudi Avenue, Loudi High-tech Industrial Development Zone, Lianyuan City, Loudi City, Hunan Province
Telephone:400-186-0868
E-mail:3804246750@qq.com
E-mail:19967177733@163.com
0
Consult now
WeChat Public Number
TikTok