Super early strength polymer rapid-patching motar material

A technology for repairing mortar and polymer is applied in the field of rapid repair of surface defects of bridge beams and road concrete structures of high-speed railway passenger dedicated lines, which can solve the problems of hourly strength, low bonding strength and flexural strength, etc., to improve work performance and Appearance, improved working performance, high bond strength effect

Active Publication Date: 2010-09-15
JIANGSU SOBUTE NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problems of low hourly strength, bonding strength and flexural strength of the existing repair

Method used

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  • Super early strength polymer rapid-patching motar material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Rapid hardening sulfoaluminate cement: 46.3% (mass percentage); Quartz sand: 47%; Vinyl acetate / ethylene copolymer rubber powder: 5%; Hydroxyethyl methyl cellulose ether: 0.2%; Borax: 0.4%; Sulfuric acid 1:1 mixing of aluminum and calcium fluoride: 0.2%; naphthalene sulfonate superplasticizer (powder); 0.55%; silicone defoamer: 0.06%; 6mm polypropylene fiber: 0.02%.

[0032] When using on site, mix the dry powder of repair mortar and water at a ratio of 1:0.13 to form a slurry evenly. Referring to "Polymer Cement Waterproof Mortar" JC / T 984-2005, the measured positive tensile bond strength of the obtained repair mortar is 2.5MPa at 7d, 3.0MPa at 28d, 28MPa at 3h, and 28MPa at 1d. The strength is 51MPa, and the 1d flexural strength is 12.3MPa.

Embodiment 2

[0034] Rapid hardening sulfoaluminate cement: 40.0% (mass percentage); Quartz sand: 50.3%; Carboxylic acid block copolymer powder: 8%; Hydroxyethyl methyl cellulose ether: 0.3%; Borax: 0.4%; Aluminum sulfate and calcium fluoride 1:1 mixed: 0.3%; polycarboxylate superplasticizer (powder); 0.24%; polyether defoamer: 0.04%; 3mm polypropylene fiber: 0.02%.

[0035] The measured positive tensile bond strength of the obtained repair mortar was 2.2MPa at 7d, 2.6MPa at 28d, 25MPa at 3h, 49MPa at 1d, and 11.6MPa at flexural strength at 1d.

Embodiment 3

[0037] Rapid hardening sulfoaluminate cement: 50.0% (mass percentage); Quartz sand: 44.4%; Acrylic polymer rubber powder: 3%; Hydroxypropyl methyl cellulose ether: 0.3%; Citric acid: 0.9%; 1:1 mixing of aluminum sulfate and calcium formate: 0.8%; polycarboxylate superplasticizer (powder); 0.40%; polyether defoamer; 0.07%; 9mm polypropylene fiber: 0.08%.

[0038] The measured positive tensile bond strength of the obtained repair mortar was 2.4MPa at 7 days, 2.75MPa at 28 days, 29MPa at 3 hours, 54MPa at 1 day, and 12.8MPa at 1 day.

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Abstract

The invention relates to a super early strength polymer rapid-patching motar material prepared from the following components in percentage by weight: 36-50 rapid hardening cement, 42-54 quartz sand, 2-10 polymer tackifier, 0.1-0.5 thickener, 0.1-0.8 early strength agent, 0.15-0.9 set-controlling admixture, 0.1-0.6 water reducing agent, 0.02-0.1 antifoaming agent and 0.01-0.08 chemical staple. Thesuper early strength rapid-patching motar has excellent construction performance and is characterized by rapid hardening and slow setting, the initial setting time is more than or equal to 30 minutes, the final setting time is smaller than or equal to 2 hours, the compression strength in 3 hours can reach more than 25 MPa, the later strength is stably increased, the pulling cohesive strength between the motar and a concrete interface can reach more than 2.5MPa, and the super early strength rapid-patching motar also has the advantages of good waterproofness and impermeability, strong crack resistance, convenient use, and the like, and can be used for the rapid patching of bridge and road surfaces, especially for the rapid patching of beam surfaces and beam bodies of passenger special lines.

Description

technical field [0001] The present invention relates to a super-early-strength polymer quick-repair mortar material and a preparation method thereof, in particular to a quick-repair method suitable for surface defects of bridge beams (surfaces) and road concrete structures on high-speed railway passenger dedicated lines. Simply add water and stir at the construction site. Background technique [0002] At present, China's economic construction is developing rapidly at an unprecedented high speed, and infrastructure construction is developing in a magnificent manner. Therefore, higher requirements are put forward for improving the service life of infrastructure projects, especially high-speed railways and railway passenger dedicated lines. The design speed of the high-speed railway is 350km / h. High-speed driving requires specific and high smoothness of the line. It puts forward high requirements for the line shape control of the beam part during the construction of the bridge ...

Claims

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Application Information

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IPC IPC(8): C04B28/36C04B14/06C04B22/14C04B24/04
CPCC04B2111/0075C04B28/02
Inventor 缪昌文刘加平周华新刘建忠洪锦祥
Owner JIANGSU SOBUTE NEW MATERIALS
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