How to Avoid Problems with Pumping Equipment Concrete

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  • Centrifugal pump vibration readings 2-9 – McNally Institute

    Apr 12, 2021 · Harmonic vibration from nearby equipment. Operating the pump at a critical speed. Watch out for this problem in variable speed and pulley driven pumps. Seal "slip stick" at the seal faces. This can occur if you are pumping a non-lubricating fluid, a gas or a dry solid. A pump discharge recirculation line aimed at the seal faces.

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  • Pump Troubleshooting - Problems and Failures | Pumps & Systems

    Dec 17, 2011 · To consistently avoid or cure these problems, it is important to understand what cavitation really is and what causes it in a centrifugal pump. Cavitation is a two part process caused by the changes in pressure as the liquid moves through the impeller.

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  • 5 Common Causes of Concrete Pump Blockage and How to Avoid

    How to Avoid Concrete Pumping Problems? 1. Concrete Mixture. If the concrete mixture fails to retain a sufficient amount of water, the probability of a concrete 2. Handling Concrete. Improper mixing of concrete constituents leads to segregation in the mix, and hence in failed 3. Labor Skills.

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  • CONCRETE & MASONRY SAFETY

    concrete & masonry safety concrete placement operations potential for multiple serious safety problems cranes/bucket concrete pumping equipment fall protection large crews tight placement timing electrical gfci power finishing formwork failure improper shoring re-shoring

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  • Avoid too Much Pressure in Concrete | For Construction Pros

    Jul 01, 2010 · Concrete placement technique directly affects placement rate. Placing concrete with a crane and bucket, as shown in the photo above, is a slower process than placing concrete with a pump …

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  • Concrete Vibrating Tips - The Spruce

    Jul 14, 2021 · The concrete won't wait for you to sort out equipment problems. Insert the vibrator in a vertical or nearly vertical position to maximize its effect. Also, do not bend a vibrator excessively, which can ruin it. Avoid the common mistake of using a vibrator as a concrete placement tool. Be sure to penetrate previous lift or layers of concrete

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  • Dewatering Techniques for Construction Projects

    Dec 06, 2019 · Dewatering and construction dewatering are terms used to describe the action of removing groundwater or surface water from a construction site. Normally the dewatering process is done by pumping or evaporation. It is usually done before excavation for footings and will help to lower the water table that might cause problems during excavations.

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  • Concrete Pumping - How to Pump Cement - Concrete Network

    Concrete being pumped through a line experiences friction with the internal wall of the pipeline. The longer the line, the more friction encountered. For longer pumping distances, the use of smooth-walled steel pipe can lower the resistance. The length of hose used at the end of the pipeline adds to the overall line length as well.

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  • How to Avoid Problems with Pumping Equipment| Concrete

    Concrete Pump Blockage - Causes & Clearing - The Concrete

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  • Pump Troubleshooting - Problems and Failures | Pumps & Systems

    Dec 17, 2011 · To consistently avoid or cure these problems, it is important to understand what cavitation really is and what causes it in a centrifugal pump. Cavitation is a two part process caused by the changes in pressure as the liquid moves through the impeller.

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  • Methods of Placing of Concrete for Various Situations

    Mar 05, 2019 · In the pump method, its working starts with the suction stroke which sucks the concrete inside the pipe. The piston is provided for the suction and delivery of concrete. To match the pump and requirements of placing rate, it's important to choose the correct …

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  • CHAPTER 4 DESIGN AND CONSTRUCTION OF SEWAGE …

    All pumping stations should have potable water supply, washroom and toilet facilities and precautions taken to prevent cross connections. 10. Hoisting equipment shall be provided for handling of equipment and materials, which cannot be readily lifted or removed by manual labour. Hence, in large pumping stations, gantries of

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  • Major Problems in Concrete Pumping Works: How to Avoid

    Concrete Pump Blockage - Causes & Clearing - The Concrete

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  • 3 Main Problems with Mudjacking - Concrete Hero

    Dec 21, 2018 · Mudjacking is not new. This technique used to lift and level sunken concrete slabs has been around for over 70 years. The mudjacking process works by pumping a slurry (typically comprised of a mixture of sand, cement and/or soil) below a slab through holes at the surface. The hydraulic pressure from the mudjacking machine causes the slab to rise.

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  • 8 Best Practices for Pumping Sodium Hypochlorite (Bleach)

    Install an automatic "air-bleed" valve as close to the pump as possible and at the high point of the discharge line. Make sure all piping connections are tightly sealed to avoid air or vacuum leaks. Use a Peristaltic or "Hose" type pump (similar to the one below) since it can handle the air in the system better and prime and/or perform a

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  • CHAPTER 4 DESIGN AND CONSTRUCTION OF SEWAGE …

    All pumping stations should have potable water supply, washroom and toilet facilities and precautions taken to prevent cross connections. 10. Hoisting equipment shall be provided for handling of equipment and materials, which cannot be readily lifted or removed by manual labour. Hence, in large pumping stations, gantries of

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  • Batching, Mixing, Transporting, and Handling Concrete

    equipment and if the equipment is selected to reduce the delay time during concrete placement. Early Stiffening and Drying Out. Concrete begins to stiffen as soon as the cementitious materials and water are mixed, but the degree of stiffening that occurs in the first 30 minutes is not usually a problem; concrete …

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  • Practical Considerations in Pump Suction Arrangements

    Check valves are installed on pump discharge lines to prevent liquid flow reversal with the succession of pumping. In a similar fashion, a foot valve is simply a form of check valve, usually in a vertical position, usually incorporating a strainer, installed in the pump suction line (see Figure 3). The purpose of the foot

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  • Machinery | Machinery installation best practices Follow

    Dec 15, 2002 · When machines are anchored to a concrete foundation, J-bolts are fixed into the concrete as it is poured. Size bolts to ensure adequate holding torque and to prevent them from loosening over time. Exercise care when selecting the grade of bolt, and determine if the mounting pattern will be rigid enough to lock mounting plates to the foundation.

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  • Batching, Mixing, Transporting, and Handling Concrete

    equipment and if the equipment is selected to reduce the delay time during concrete placement. Early Stiffening and Drying Out. Concrete begins to stiffen as soon as the cementitious materials and water are mixed, but the degree of stiffening that occurs in the first 30 minutes is not usually a problem; concrete …

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