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Composite toughened grouting cement mortar and preparation method thereof

A cement mortar and toughening technology, applied in the field of building materials, can solve the problems of application limitation, easy cracking, large internal stress, etc., and achieve the effects of easily satisfying preparation conditions, reducing maintenance costs, and improving crack resistance.

Active Publication Date: 2016-05-04
福建省东霖建设工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high crosslinking density and three-dimensional network structure of a single epoxy resin after curing, there are disadvantages such as large internal stress, brittleness, poor impact resistance, and easy cracking, which makes it difficult to meet the engineering technical requirements of concrete toughening, making its application restricted. certain restrictions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 1. Preparation of modified composite carbon nanomaterials:

[0045] 1) Put 62 stainless steel balls with a diameter of 5mm and 46 stainless steel balls with a diameter of 10mm in two identical 6L nylon ball mill tanks, and then add 1.4kg of natural single crystal graphite powder and multi-walled carbon nanotubes respectively According to the composite carbon material with a mass ratio of 1.5:1, 120mL of absolute ethanol was added dropwise, sealed with a nylon cover, and two ball mill jars were symmetrically placed in the ball mill. Under the condition of ball milling for 60h;

[0046] 2) Add the composite carbon material treated in step 1) into Tween40 aqueous solution with a pH value of 8 and a mass concentration of 16%, ultrasonication for 15 hours, and filtration. The resulting filter residue was washed with water and then vacuum-dried at 62°C for 20 hours;

[0047] 3) Add the composite carbon material treated in step 2) into the HCl solution with a concentration of...

Embodiment 2

[0060] 1. Preparation of modified composite carbon nanomaterials:

[0061] 1) Put 62 stainless steel balls with a diameter of 5mm and 46 stainless steel balls with a diameter of 10mm into two identical 6L nylon ball mill tanks, and then add 1.4kg of high-purity ultrafine graphite powder and multi-walled carbon nanotubes. Composite carbon material with a mass ratio of 1.5:1, then add 120mL of absolute ethanol dropwise, seal it with a nylon cover, put two ball mill jars into the ball mill symmetrically, at a speed of 500rpm, and automatically change the direction of rotation every 30min Lower ball milling treatment for 60h;

[0062] 2) Add the composite carbon material treated in step 1) into Tween40 aqueous solution with a pH value of 8 and a mass concentration of 16%, ultrasonication for 15 hours, and filtration. The resulting filter residue was washed with water and then vacuum-dried at 62°C for 20 hours;

[0063] 3) Add the composite carbon material treated in step 2) into ...

Embodiment 3

[0076] 1. Preparation of modified composite carbon nanomaterials:

[0077] 1) Put 62 stainless steel balls with a diameter of 5mm and 46 stainless steel balls with a diameter of 10mm into two identical 6L nylon ball mill tanks, and then add 1.4kg of high-purity ultrafine graphite powder and multi-walled carbon nanotubes. Composite carbon material with a mass ratio of 1.5:1, then add 120mL of absolute ethanol dropwise, seal it with a nylon cover, put two ball mill jars into the ball mill symmetrically, at a speed of 500rpm, and automatically change the direction of rotation every 30min Lower ball milling treatment for 60h;

[0078] 2) Add the composite carbon material treated in step 1) into Tween40 aqueous solution with a pH value of 8 and a mass concentration of 16%, ultrasonication for 15 hours, and filtration. The obtained filter residue was washed with water and then vacuum-dried at 60°C for 20 hours;

[0079] 3) Add the composite carbon material treated in step 2) into t...

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Abstract

The invention discloses a composite toughened grouting cement mortar and a preparation method thereof. The composite toughened grouting cement mortar is prepared from the following raw materials in parts by weight: 80-100 parts of cement, 120-180 parts of 50-200-mesh fine sand, 20-50 parts of water, 5-10 parts of polyurethane solution, 5-10 parts of epoxy resin emulsion, 10-15 parts of toughening additive, 1.5-6 parts of early-strength admixture, 2-9 parts of methacrylic acid, 2-6 parts of calcium formate, 2-8 parts of neopentyl glycol, 0.2-0.8 part of sodium dodecyl benzene sulfonate and 0.9-2.4 parts of water reducing agent. A modified composite carbon nano material, activated wood meal and isotactic polypropylene are combined to form the unique toughening additive under the surface modification actions of a coupling agent and a compatilizer; and when the toughening additive is used for preparing the cement mortar, the prepared cement mortar has the advantages of favorable toughness, favorable fatigue resistance and favorable isotropy, and is beneficial to enhancing the crack resistance of the grouting mortar and reducing the engineering maintenance cost in the later period.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a compound toughened grouting cement mortar and a preparation method thereof. Background technique [0002] Ordinary mortar has a low tension-compression ratio, large dry shrinkage deformation, poor impermeability, crack resistance, corrosion resistance, and high density, so its application range is greatly restricted. With the development of industry, it is required to further improve the performance of mortar, and it is necessary to improve the performance of the cementing material used, so polymer mortar came into being. Polymer mortar uses polymers to modify cement mortar so that while maintaining the original advantages of inorganic materials such as compressive strength, flexural strength, and aging resistance of cement, organic materials with strong cohesive force, good deformability, and sealing are added. It has the characteristics of strong resistance, so ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B24/40
CPCC04B28/00C04B40/0039C04B2103/302C04B14/06C04B24/28C04B24/281C04B24/04C04B24/026C04B24/16C04B24/226C04B22/02C04B24/00C04B24/26C04B24/40C04B14/28
Inventor 蒋国平肖三霞
Owner 福建省东霖建设工程有限公司
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