Preparation method of polymer-modified cement mortar for reparation

A repairing mortar and polymer technology, which is applied in the field of preparation of polymer modified cement repairing mortar, can solve the problems of material surface falling off, affecting the service life, and easy penetration of mortar, so as to achieve good construction performance, prolong service life and wide application foreground effect

Inactive Publication Date: 2017-03-15
常州市鼎升环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The mortar is easy to permeate, the surface of the material falls off, and the service life is affected. A preparation method for polymer modified cement repair mortar is provided. The invention heats sodium lauryl sulfate, fatty alcohol polyoxyethylene ether, etc. Then mix with butyl acrylate, glycidyl methacrylate, etc., and add ammonium persulfate solution dropwise. After the reaction is complete, filter and discharge the material to obtain an acrylate polymer emulsion, and then mix it with ethylene-vinyl acetate The copolymer emulsion is prepared into a mixed emulsion in proportion, and at the same time, the ordinary portland cement, quartz sand, rubber powder, polypropylene fiber silk, etc. are prepared in proportion to form a mixed powder, and finally the mixed powder, mixed emulsion and deionized water are stirred Uniform, discharge, that is, polymer modified cement repair mortar

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] Weigh 3.2g sodium lauryl sulfate, 4.0g fatty alcohol polyoxyethylene ether, 1.2g dodecyl mercaptan, 0.8g sodium bicarbonate, add 120mL deionized water, and stir at 300r / min for 15min, then Raise the temperature to 80°C, keep it warm for 30min, then add 180mL butyl acrylate, 135mL glycidyl methacrylate, 10mL hydroxypropyl methacrylate in turn, continue stirring and dropwise add 200mL 1% persulfuric acid at 2mL / min Ammonium solution, reacted for 2 hours, cooled to room temperature to obtain a mixed solution, then adjusted the pH of the mixed solution to 7.5 with a mass fraction of 10% sodium hydroxide solution, passed through a 250-mesh filter, and discharged to obtain an acrylate polymer emulsion; Measure 200mL of the above-mentioned acrylate polymer emulsion, 100mL of ethylene-vinyl acetate copolymer emulsion, mix them with 8g of Tween-20 evenly, put them into a high-speed shearing machine, stir and mix at 6000r / min for 30min to obtain a mixed emulsion, weigh 180g of or...

example 2

[0019] Weigh 3.6g sodium lauryl sulfate, 4.5g fatty alcohol polyoxyethylene ether, 1.5g dodecyl mercaptan, 1.2g sodium bicarbonate, add 150mL deionized water, and stir at 400r / min for 20min, then Raise the temperature to 85°C, keep it warm for 40min, then add 200mL butyl acrylate, 150mL glycidyl methacrylate, 15mL hydroxypropyl methacrylate, and add 200mL of 1% persulfuric acid dropwise at 4mL / min Ammonium solution, reacted for 3 hours, cooled to room temperature to obtain a mixed solution, then adjusted the pH of the mixed solution to 8.0 with a mass fraction of 10% sodium hydroxide solution, passed through a 250-mesh filter, and discharged to obtain an acrylate polymer emulsion; Measure 400mL of the above-mentioned acrylate polymer emulsion, 150mL of ethylene-vinyl acetate copolymer emulsion, mix them with 12g of Tween-20 evenly, put them into a high-speed shearing machine, stir and mix at 8000r / min for 40min to obtain a mixed emulsion, weigh 220g of ordinary Portland cement...

example 3

[0022]Weigh 3.4g sodium lauryl sulfate, 4.3g fatty alcohol polyoxyethylene ether, 1.4g dodecyl mercaptan, 1.0g sodium bicarbonate, add 135mL deionized water, and stir at 350r / min for 18min, then Raise the temperature to 83°C, keep it warm for 35min, then add 190mL butyl acrylate, 143mL glycidyl methacrylate, 13mL hydroxypropyl methacrylate in turn, continue stirring and dropwise add 200mL 1% persulfuric acid at 3mL / min Ammonium solution, reacted for 3 hours, cooled to room temperature to obtain a mixed solution, then adjusted the pH of the mixed solution to 7.8 with a mass fraction of 10% sodium hydroxide solution, passed through a 250-mesh filter, and discharged to obtain an acrylate polymer emulsion; Measure 300mL of the above-mentioned acrylate polymer emulsion, 130mL of ethylene-vinyl acetate copolymer emulsion, mix them with 10g of Tween-20 evenly, put them into a high-speed shearing machine, stir and mix at 7000r / min for 35min to obtain a mixed emulsion, weigh 200g of or...

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Abstract

The invention relates to a preparation method of polymer-modified cement mortar for reparation, and belongs to the technical field of preparation of mortar for reparation. The method includes subjecting lauryl sodium sulfate and fatty alcohol polyoxyethylene ether and the like to heating reaction prior to mixing with butyl acrylate, epoxypropyl methacrylate and the like, dropwise adding ammonium persulfate solution, filtering and discharging after complete reaction to prepare acrylate polymer emulsion, preparing acrylate polymer emulsion and vinyl chloride ethylene copolymer emulsion into mixed emulsion according to proportion, meanwhile preparing ordinary Portland cement, quartz sand, rubber powder, polypropylene fiber and the like into mixed powder, and uniformly stirring mixed powder, mixed emulsion and deionized water prior to discharging to obtain the polymer-modified cement mortar for reparation. By compounding of acrylate polymer emulsion and vinyl chloride ethylene copolymer emulsion, durability and cohesiveness of mixed emulsion are improved, and mechanical property of mortar is improved by addition of polypropylene fibers, rubber powder and the like.

Description

technical field [0001] The invention relates to a preparation method of polymer modified cement repair mortar, which belongs to the technical field of preparation of repair mortar. Background technique [0002] Polymer cement mortar is widely used in the reinforcement of concrete structures. Polymer repair mortar is a high-strength inorganic adhesive specially developed for ordinary cement mortar that is not suitable as a protective layer for thermal insulation materials. It can replace various organic adhesives and greatly improve thermal insulation. the quality of the system. The main advantages of polymer modified mortar as a concrete structure repair material: it has good cohesiveness and water resistance, does not require moisture curing, the shrinkage of polymer cement mortar is the same or slightly lower than that of ordinary concrete, and the flexural resistance of polymer cement mortar The strength, tensile strength, abrasion resistance and impact resistance are hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C08F220/18C08F220/32C08F220/28C08F2/26C08F2/30
CPCC04B28/04C04B2111/00482C04B2201/50C08F2/26C08F2/30C08F220/18C08F220/1804C04B14/06C04B18/22C04B16/0633C04B2103/302C04B24/2641C04B24/26C08F220/32C08F220/281
Inventor 许斌宋豪赵玲玲
Owner 常州市鼎升环保科技有限公司
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