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Preparation method of lubricating agent aqueous dispersion emulsion of pipeline for pumping concrete

A technology for pumping concrete and dispersing emulsion, applied in the direction of lubricating composition, etc., can solve the problems of high viscosity of lubricant aqueous solution, taking a long time to dissolve, restricting the application of lubricant, etc. Applicable effect

Active Publication Date: 2014-05-28
JIANGSU SOBUTE NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, polyacrylamide takes a long time to dissolve due to the very strong hydrogen bond in the molecular chain. Currently, the dissolution time of commercially available polyacrylamide is more than one hour.
At the same time, the viscosity of the lubricant aqueous solution is too high, the fluidity is poor, the operation is difficult, and special equipment is required to effectively lubricate the pump. These problems restrict the application of this lubricant in the construction site

Method used

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  • Preparation method of lubricating agent aqueous dispersion emulsion of pipeline for pumping concrete
  • Preparation method of lubricating agent aqueous dispersion emulsion of pipeline for pumping concrete
  • Preparation method of lubricating agent aqueous dispersion emulsion of pipeline for pumping concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Add 10.06 grams of acrylic acid monomer, 9.94 grams of acrylamide monomer, hydroxyethyl cellulose (DS=1, viscosity 10000mPa. s) 10 grams, 24 grams of sodium chloride, 145 grams of water, stir until all the solids are dissolved to form a clear solution, adjust the pH of the solution to 2.5, raise the temperature to 20 ° C, and add 0.02 grams of initiator aqueous solution for the first time after deoxygenating with nitrogen for 30 minutes , the initiator is (NH 4 ) 2 S 2 o 8 / NaHSO 3 (The weight ratio is 1:1), after that, add 0.02 g of the same initiator aqueous solution every 3 hours, add twice, and react for 24 hours after all the initiators are added, to obtain a milky white lubricant water-dispersed emulsion, adjust its pH to 6 . The molecular weight of the polyacrylamide, the dissolution time of the lubricant and the drag reduction rate were measured, and the test results are shown in Table 2.

Embodiment 2

[0059] Add 10.1 grams of acrylic acid monomer, 29.9 grams of acrylamide monomer, hydroxypropyl cellulose (DS=2, viscosity 75000mPa. s) 20 grams, 36 grams of sodium sulfate, 103 grams of water, stir until all the solids are dissolved to form a clear solution, adjust the pH of the solution to 3, heat up to 30°C, and add 0.1 grams of the initiator aqueous solution for the first time after deoxygenating with nitrogen for 30 minutes. The initiator is (NH 4 ) 2 S 2 o 8 / Na 2 SO 3 (The weight ratio is 1.5:1), after that, add 0.1 g of the same initiator aqueous solution every 3 hours, add three times, react for 24 hours after adding all the initiators, and obtain a milky white lubricant water-dispersed emulsion, adjust its pH to 7. The molecular weight of the polyacrylamide, the dissolution time of the lubricant and the drag reduction rate were measured, and the test results are shown in Table 2.

Embodiment 3

[0061] Add 6.08 grams of acrylic acid monomer, 53.92 grams of acrylamide monomer, hydroxypropyl methylcellulose (DS=1.5, viscosity 100000mPa s) 30g, ammonium sulfate 60g, water 49g, stir until all the solids dissolve to form a clear solution, adjust the pH of the solution to 4.5, raise the temperature to 25°C, and add the initiator aqueous solution 0.015 grams, the initiator is K 2 S 2 o 8 / NaHSO 3 (The weight ratio is 1.2:1), and then add 0.015 g of the same initiator aqueous solution every 3 hours, and then react for 24 hours to obtain a milky white lubricant water-dispersed emulsion, and adjust its pH to 8. The molecular weight of the polyacrylamide, the dissolution time of the lubricant and the drag reduction rate were measured, and the test results are shown in Table 2.

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Abstract

The invention relates to a preparation method of a lubricating agent aqueous dispersion emulsion of a pipeline for pumping concrete. The preparation method comprises the following steps: a, adding monomers, cellulose ether, an inorganic salt and water in a reactor according to the following proportion, stirring until solids are completely dissolved to form a solution; b, regulating the pH of the solution obtained in step a to 2.5-4.5, raising the temperature to 20-50 DEG C; and c, introducing nitrogen for removing oxygen, adding an initiating agent for reacting to obtain the lubricating agent aqueous dispersion emulsion, wherein the adding quantity of the initiating agent is 5-100ppm of the total weight of the monomer. The lubricating agent aqueous dispersion emulsion of the pipeline for pumping the concrete has the advantages of high dissolving speed, capability of greatly reducing pumping resistance of the concrete, no harm to the concrete and environment, good dispersing effect, stability in storage, easy field construction, strong applicability and the like.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a lubricant water-dispersed emulsion for pumping concrete pipelines and a preparation method thereof. Background technique [0002] Commercial ready-mixed concrete has been widely used since it was promoted in my country. At present, ready-mixed concrete is mainly poured by pumping technology at the construction site. Before starting the pump, the pump truck and pipeline must be lubricated. For decades, my country has used water and mortar to lubricate the pipeline to reduce the frictional resistance of pumped concrete and eliminate pump blockage. Phenomenon, to ensure that the pumping can be carried out smoothly. [0003] The main components of traditional pipe moistening mortar are cement and sand, which greatly wastes resources, increases pumping costs, and produces dust pollution during its manufacturing process. At the same time, every time the pump t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M173/02C10M177/00
Inventor 刘加平黄振冉千平舒鑫
Owner JIANGSU SOBUTE NEW MATERIALS