Mortar without visible alkali efflorescence

A technology of mortar and efflorescence, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of exacerbation of efflorescence and whitening, and achieve reduced maintenance time, short maintenance time, and weather resistance Good results

Inactive Publication Date: 2016-07-06
SHANGHAI SUNRISE POLYMER MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ca(OH) 2 It will further react with carbon dioxide in the air to form insoluble calcium carbonate, which aggravates the problem of efflorescence and whitening

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A mortar without visible efflorescence, which consists of the following components in mass percentage:

[0028] Sulphoaluminate cement 20%;

[0029] Class I fly ash 5%;

[0030] Quartz sand 60%;

[0031] Acrylic emulsion 2%;

[0032] Cellulose ether 0.05%;

[0033] Polycarboxylate superplasticizer 0.1%;

[0034] Boric acid 0%;

[0035] Water 12.85%;

[0036] Defoamer 0%.

[0037] The cellulose ether is hydroxypropyl methylcellulose ether with a viscosity of 400mPa·s; the polycarboxylate water reducer is the VIVID-500D polycarboxylate high-performance water reducer mother liquor of Shanghai Sanrui Enterprise, with a solid content of 50%.

[0038] According to the stated ratio, premix sulfoaluminate cement, Class I fly ash, quartz sand, cellulose ether and boric acid to form dry mortar powder; add acrylic acid emulsion, polycarboxylate water reducer and defoamer Water and stir evenly to form a liquid mixture; add the dry mortar powder into the liquid mixture, use...

Embodiment 2

[0041] A mortar without visible efflorescence, which consists of the following components in mass percentage:

[0042] Sulphoaluminate cement 40%;

[0043] Class I fly ash 10%;

[0044] Quartz sand 30%;

[0045] Acrylic emulsion 5%;

[0046] Cellulose ether 0.01%;

[0047] Polycarboxylate superplasticizer 0.5%;

[0048] Boric acid 0.1%;

[0049] Water 14.385%;

[0050] Defoamer 0.005%.

[0051] The cellulose ether is hydroxypropyl methylcellulose ether with a viscosity of 1000mPa·s; the polycarboxylate water reducer is the VIVID-500D polycarboxylate high-performance water reducer mother liquor of Shanghai Sanrui Enterprise, with a solid content of 40%.

[0052] According to the stated ratio, premix sulfoaluminate cement, Class I fly ash, quartz sand, cellulose ether and boric acid to form dry mortar powder; add acrylic acid emulsion, polycarboxylate water reducer and defoamer Water and stir evenly to form a liquid mixture; add the dry mortar powder into the liquid mix...

Embodiment 3

[0055] A mortar without visible efflorescence, which consists of the following components in mass percentage:

[0056] Sulphoaluminate cement 30%;

[0057] Class I fly ash 8%;

[0058] Quartz sand 45%;

[0059] Acrylic emulsion 3%;

[0060] Cellulose ether 0.03%;

[0061] Polycarboxylate superplasticizer 0.3%;

[0062] Boric acid 0.05%;

[0063] Water 13.61%;

[0064] Defoamer 0.01%.

[0065] The cellulose ether is hydroxypropyl methylcellulose ether with a viscosity of 400mPa·s; the polycarboxylate water reducer is the VIVID-500D polycarboxylate high-performance water reducer mother liquor of Shanghai Sanrui Enterprise, with a solid content of 50%.

[0066] According to the stated ratio, premix sulfoaluminate cement, Class I fly ash, quartz sand, cellulose ether and boric acid to form dry mortar powder; add acrylic acid emulsion, polycarboxylate water reducer and defoamer Water and stir evenly to form a liquid mixture; add the dry mortar powder into the liquid mixtur...

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Abstract

The invention discloses mortar without visible alkali efflorescence. The mortar comprises, by weight, 20-40% of cement, 5-10% of coal ash, 30-60% of quartz sand, 2-5% of emulsion, 0.01-0.05% of cellulose ether, 0.1-0.5% of water reducing agents, 0-0.1% of retarders, 10-20% of water and 0-0.01% of defoaming agents. The mortar without the visible alkali efflorescence has the advantages that the mortar is free of the visible alkali efflorescence and dry-shrinkage cracking, short in curing time, good in weather fastness and harmless to environments and human bodies, and is rigid and flexible.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a mortar without visible efflorescence. Background technique [0002] Pan-alkali is a common problem encountered in the use of traditional mortar. It will cause the coating on the surface to peel off, affecting the appearance of the building. The salt particles that cause pan-alkaline to float in the air will affect human health. Portland cement is often used as the cementitious material in traditional mortar, and a large amount of Ca(OH) is produced during the hydration process of the silicate 2 , After the mortar is hardened, there are more capillary pores inside, and the Ca(OH) in the wall material and the mortar 2 Migrate to the surface of the mortar with the water along the capillary pores, and the salts are precipitated after the water evaporates, forming white spots. Ca(OH) 2 It will further react with carbon dioxide in the air to generate insoluble calcium carbonate, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B18/08C04B24/26C04B111/20
CPCC04B28/06C04B2111/2023C04B18/08C04B14/06C04B24/2641C04B24/383C04B24/24C04B22/0013C04B24/42Y02W30/91
Inventor 任乾睦沈军寿建平
Owner SHANGHAI SUNRISE POLYMER MATERIAL CO LTD
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