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Novel lubricant for concrete pumping pipelines

A technology for concrete pumps and lubricants, applied in lubricating compositions, petroleum industry, etc., can solve the problems of reducing concrete strength, high cost, and manpower consumption, and achieve the effects of reducing pumping resistance, reducing dosage, and reducing impact

Inactive Publication Date: 2019-05-21
RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of cement mortar to lubricate pipelines requires manpower, material and financial resources to produce. This technology has two insurmountable shortcomings: First, the amount of cement mortar is large, and a single lubricating pipe usually requires several cubic meters of cement mortar
The above-mentioned polymer pipeline lubricants have the advantages of environmental protection, energy saving and emission reduction, and improved pumping performance. However, the current pipeline lubricant products use a high amount of polymer, resulting in high cost, and relying solely on the drag reduction effect of polymer solutions still needs to be further improved
On the other hand, when a small amount of lubricant solution is mixed into concrete, it will reduce the strength of concrete

Method used

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  • Novel lubricant for concrete pumping pipelines
  • Novel lubricant for concrete pumping pipelines

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Lubricants were formulated in the following percentages by weight: polyacrylamide 8%; hydroxypropyl methylcellulose 6%; sodium sulfate 50%; glass microspheres 36%. Among them, the molecular weight of polyacrylamide is 18 million, and the particle size range of glass microspheres is 10-20 μm. The above-mentioned raw materials are weighed in parts by weight and then stirred evenly. Prepare the lubricant solution according to the mass ratio of lubricant: water = 1:99. During the preparation process, the lubricant should be slowly added to the water while stirring continuously until the lubricant is completely dissolved to obtain a lubricant solution with a mass fraction of 1%. The dissolution time was determined to be 4 minutes, and the viscosity of the lubricant solution was 68 mPa·s.

Embodiment 2

[0020] Lubricants were formulated in the following percentages by weight: polyacrylamide 8%; carboxymethyl cellulose 2%; sodium sulfate 30%; glass microspheres 60%. Among them, the molecular weight of polyacrylamide is 16 million, and the particle size range of glass microspheres is 10-20 μm. The above-mentioned raw materials are weighed in parts by weight and then stirred evenly. Prepare the lubricant solution according to the mass ratio of lubricant: water = 1:99. During the preparation process, the lubricant should be slowly added to the water while stirring continuously until the lubricant is completely dissolved to obtain a lubricant solution with a mass fraction of 1%. It was measured that the dissolution time was 5 min, and the solution viscosity was 52 mPa·s.

Embodiment 3

[0022] Lubricants were formulated in the following percentages by weight: polyacrylamide 4%; hydroxypropyl methylcellulose 6%; ammonium sulfate 40%; glass microspheres 50%. Among them, the molecular weight of polyacrylamide is 15 million, and the particle size range of glass microspheres is 10-20 μm. The above-mentioned raw materials are weighed in parts by weight and then stirred evenly. Prepare the lubricant solution according to the mass ratio of lubricant: water = 1:99. During the preparation process, the lubricant should be slowly added to the water while stirring continuously until the lubricant is completely dissolved to obtain a lubricant solution with a mass fraction of 1%. It was measured that the dissolution time was 4min, and the solution viscosity was 45mPa·s.

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Abstract

The invention relates to a novel lubricant for concrete pumping pipelines. The novel lubricant comprises the following component in weight percentage: 4-8% of polyacrylamide, 2-6% of cellulose ether,30-50% of a dissolving promoter and 36-60% of drag-reduction microspheres; wherein the drag-resistance microspheres adopt inorganic microspheres with high strength and smooth surfaces, thereby obviously reducing the frictional resistance between concrete and pipelines. The novel lubricant for the concrete pumping pipelines provided by the invention has the advantages of being low in cost, rapid indissolution, green and environmental-friendly, easy to apply in field construction, capable of significantly reducing concrete pumping resistance, and the like.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a novel concrete pumping pipeline lubricant. Background technique [0002] The scale of modern construction projects is getting larger and larger. In order to meet the needs of rapid construction, almost all concrete poured on site adopts pumping construction technology. In concrete pumping construction, in order to reduce the risk of concrete clogging and reduce the loss of pipeline wear, it is necessary to pre-lubricate the pipeline. Traditionally, cement mortar is a good pipeline lubrication material. The use of cement mortar to lubricate pipelines has the advantages of simple technology and local materials. However, the use of cement mortar to lubricate pipelines requires manpower, material and financial resources to produce. This technology has two insurmountable shortcomings: First, the amount of cement mortar is large, and a single lubricating pipe usually requires seve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10M173/02C10N30/02C10N30/06
Inventor 渠亚男李享涛仲新华谢永江王家赫孔庆欣苏婉玉程冠之裘智辉李连吉谢清清王伟唯
Owner RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI
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