A high-fluidity rapid repair mortar

A technology of repairing mortar with high fluidity, which is applied in the field of building materials to achieve the effect of good adhesion, short sealing time and good fluidity of slurry

Active Publication Date: 2020-10-09
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention aims at the deficiency of existing repairing materials, and provides a kind of fast repairing mortar with high fluidity

Method used

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  • A high-fluidity rapid repair mortar

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] L SAC52.5 sulfoaluminate cement 344g, PII42.5 Portland cement 38g, superfine slag powder with a specific surface area of ​​800 68g, 1.3g of naphthalene-based water reducer, 1.2g of polyacrylate defoamer, 1.3g of anhydrous calcium chloride early strength agent, 1400g of quartz sand, add water and stir to mix evenly, make a slurry, shape, and maintain in the air. The result of performance test is listed in Table 1.

Embodiment 2

[0023] R SAC52.5 sulfoaluminate cement 365g, PII52.5 Portland cement 40g, superfine slag powder with a specific surface area of ​​1000 45g, Polycarboxylate high-efficiency water reducer 2.3g, tributyl phosphate defoamer 2.7g, anhydrous sodium sulfate early strength agent 4.1g, quartz sand 1350g, add water and stir to mix evenly, adjust into slurry, shape, air Curing, made into a repair mortar solidification body, the performance test results are listed in Table 1.

Embodiment 3

[0025] 288g of R·SAC52.5 sulfoaluminate cement, 72g of PII52.5 Portland cement, 90g of superfine slag powder with a specific surface area of ​​800, Polycarboxylate high-efficiency water reducer 1.6g, tributyl phosphate defoamer 4g, lithium carbonate early strength agent 2.5g, quartz sand 1300g, add water and stir to mix evenly, make a slurry, shape, maintain in the air, make The repair mortar solidified body was formed, and the performance test results are shown in Table 1.

[0026] Table 1 embodiment performance test result

[0027]

[0028] Note: *The curing time corresponding to the standard index is 6h

[0029] The properties shown in Table 1 are in line with the relevant performance indicators stipulated in the standards JC / T 2381-2016 "Repair Mortar" and JC / T 333-2011 "Technical Conditions for Grouting Materials for Repairing Concrete Cracks". It can be seen that the prepared repair mortar sets early High strength, stable strength in the later stage, good slurry fl...

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Abstract

The invention belongs to the technical field of building materials and relates to high-fluidity quick repair mortar. The high-fluidity quick repair mortar comprises, by mass, 16 to 21% of sulphoaluminate cement, 2.0 to 4.1% of Portland cement, 2.4 to 5.2% of superfine slag powder, 0.05 to 0.15% of a water reducing agent, 0.05 to 0.25% of an antifoaming agent, 0.05 to 0.25% of an early strength agent and 73 to 76% of quartz sand. The high-fluidity quick repair mortar has high early strength, stable later strength, good slurry fluidity, an initial fluidity degree of 260mm, reasonable setting time and good compatibility with a cement matrix. The high-fluidity quick repair mortar can be widely used for the repair and reinforcement of roads, bridges, buildings and other projects.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a high-fluidity rapid repair mortar. Background technique [0002] Since the advent of concrete, its strength has experienced a development process of low, medium, high and even super high. From this point of view, people seem to be always willing to pursue the continuous improvement of strength. However, in the past 40 to 50 years, accidents of premature failure and even destruction of concrete structures caused by material deterioration have been common at home and abroad, and they are showing an increasing trend. The cause of these accidents is not due to the lack of strength of the concrete itself, but because of its poor durability. Therefore, it is of great research significance to study repairing materials that can quickly repair concrete structures, so that some aging buildings that need to be repaired can restore the design service life or a longe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/06C04B111/72
CPCC04B28/06C04B2111/00482C04B2111/72C04B2201/50C04B7/02C04B18/141C04B24/003C04B24/2641C04B22/124C04B22/147C04B22/10C04B14/06C04B2103/302
Inventor 潘志华杨刘琨
Owner NANJING TECH UNIV
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