Mortar for concrete base surface repair, and preparation method thereof

A technology of concrete and base surface, applied in the field of building mortar, can solve the problems of high price, poor crack resistance, poor adhesion, etc., to achieve good frost resistance, ensure repair performance, and reduce damage.

Inactive Publication Date: 2015-08-26

WANHUA ENERGY-SAVING TECH GRP CO LTD

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AI-Extracted Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problems of poor adhesion, poor crack resistance and high price in the existing mortar, and provide a mortar with strong adhesion...

Method used

2, the synergy of the epoxy polymer in the water-based epoxy emulsion and cellulose ether can suppress the moisture in the mortar from entering the concrete substrate too fast, so that water can stay in the mortar for a long time, prolong Improve the hydration of cement, not only improve the operating time of the mortar, but also improve the final strength of the mortar;

3, the chemical coacervation of the epoxy polymer in the water-based epoxy emulsion can form a continuous polymer network in the...

Abstract

The present invention belongs to a building mortar, and particularly relates to a mortar for concrete base surface repair, and a preparation method thereof. The mortar comprises the following raw materials by mass: 20-80 parts of silicate cement, 20-100 parts of sulphoaluminate cement, 80-190 parts of aggregate, 40-100 parts of a mineral admixture, 30-80 parts of an aqueous epoxy emulsion, 0.2-0.5 part of cellulose ether, 0.1-0.5 part of anti-cracking fibers, and 20-85 parts of water. The mortar of the present invention has characteristics of strong adhesion, excellent cracking resistance, excellent compression resistance, high bonding strength, and low price.

Technology Topic

EmulsionCellulose +6

Examples

Experimental program(4)

Example Embodiment

[0026] Example 1

[0027] A kind of mortar that is used for concrete base surface repair of the present embodiment, the mass parts of each component are as follows:

[0028] Portland cement 20

[0029] Sulphoaluminate cement 80

[0030] River sand 40-70 mesh 40

[0031] River sand 70-150 mesh 60

[0032] Heavy Calcium Powder 20

[0033] Anhydrite 20

[0034] Polypropylene fiber (3mm) 0.4

[0035] Hydroxymethyl propyl cellulose ether 0.3

[0036] Defoamer 0.1

[0037] Water reducer 0.3

[0038] Waterborne Epoxy Emulsion 45

[0039] water 25

[0040] making process:

[0041] 1) Add portland cement, sulphoaluminate cement, river sand, heavy calcium powder, anhydrite, polypropylene fiber, and hydroxymethyl propyl cellulose ether into the dry powder mortar mixer according to the above ratio and stir evenly 30 minutes;

[0042] 2) Mix the water-based epoxy resin and the epoxy resin curing agent according to the mass ratio of 1: (0.8-1.3) to prepare a water-based epoxy emulsion, then add water to the water-based epoxy emulsion and stir evenly, the water-based epoxy emulsion The mass ratio of epoxy emulsion to water is 45:25;

[0043] 3) Mix and stir the materials obtained in step 1) and step 2), add defoamer and water reducer at the same time, mix well and use.

Example Embodiment

[0044] Implementation case 2:

[0045] A mortar used for repairing concrete base surfaces, the mass parts of each component are as follows:

[0046] Portland cement 50

[0047] Sulphoaluminate cement 50

[0048] Quartz sand 40-70 mesh 60

[0049] Quartz sand 70-150 mesh 130

[0050] Blast Furnace Slag Powder 30

[0051] Fly Ash 40

[0052] Wood fiber (2mm) 0.25

[0053] Methylcellulose 0.3

[0054] Water reducer 0.1

[0055] Defoamer 0.2

[0056] Waterborne Epoxy Emulsion 70

[0057] water 30

[0058] making process:

[0059] 1. Add Portland cement, sulphoaluminate cement, quartz sand, blast furnace slag powder, fly ash, wood fiber, and methyl cellulose into the dry powder mortar mixer according to the above ratio and stir evenly for 30 minutes;

[0060] 2. Mix the water-based epoxy resin and the epoxy resin curing agent according to the mass ratio of 1:1 to prepare a water-based epoxy emulsion, then add water to the water-based epoxy emulsion and stir evenly, the water-based epoxy emulsion and water The mass ratio is 70:30;

[0061]3. Mix and stir the materials obtained in step 1) and step 2), and add defoamer and water reducer at the same time, mix well and then use.

Example Embodiment

[0062] Example 3

[0063] A kind of mortar that is used for concrete base surface repair of the present embodiment, the mass parts of each component are as follows:

[0064] Portland cement 80

[0065] Sulphoaluminate cement 100

[0066] Quartz sand 40-70 mesh 60

[0067] Quartz sand 70-150 mesh 130

[0068] Blast Furnace Slag Powder 50

[0069] Fly Ash 50

[0070] Polyacrylamide fiber (4mm) 0.5

[0071] Methylcellulose 0.5

[0072] Water reducer 0.1

[0073] Defoamer 0.1

[0074] Waterborne Epoxy Emulsion 80

[0075] water 75

[0076] making process:

[0077] 1. Add Portland cement, sulphoaluminate cement, quartz sand, blast furnace slag powder, fly ash, polyacrylamide fiber, and methyl cellulose into the dry powder mortar mixer according to the above ratio and stir evenly for 30 minutes;

[0078] 2. Mix the water-based epoxy resin and the epoxy resin curing agent according to the mass ratio of 1:1.2 to prepare the water-based epoxy emulsion, then add water to the water-based epoxy emulsion and stir evenly, the water-based epoxy emulsion and water The mass ratio is 80:75;

[0079] 3. Mix and stir the materials obtained in step 1) and step 2), and add defoamer and water reducer at the same time, mix well and then use.

PUM

Description & Claims & Application Information

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Mortar for concrete base surface repair, and preparation method thereof

A technology of concrete and base surface, applied in the field of building mortar, can solve the problems of high price, poor crack resistance, poor adhesion, etc., to achieve good frost resistance, ensure repair performance, and reduce damage.

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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