Economic anti-saltpetering inside and outside walls facing mortar

An anti-efflorescence and economical technology, applied in the field of mortar, can solve the problem of high cost of mortar, and achieve the effect of rich shape, lower cost and increased compactness

Inactive Publication Date: 2010-01-20
广东龙湖科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After several months of wind and rain, the anti-pan-alkaline exterior wall finishing mortar has no pan-alkaline phenomenon. However, the cost of this mortar is high, and it is generally only suitable for decoration on the exterior walls of high-end houses or villas.

Method used

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  • Economic anti-saltpetering inside and outside walls facing mortar
  • Economic anti-saltpetering inside and outside walls facing mortar
  • Economic anti-saltpetering inside and outside walls facing mortar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The following formulations do not add metakaolin, but use different amounts of modified bentonite for comparison.

[0034] 1. Formula

[0035] 1# 2# 3# 4#

[0036] Portland cement (42.5R) 350.00g 350.00g 350.00g 350.00g

[0037] Heavy calcium (fineness ≥ 200) 200.00g 200.00g 200.00g 200.00g

[0038] River sand (40-70 mesh) 172.00g 170.00g 169.00g 167.00g

[0039] River sand (70-140 mesh) 250.00g 250.00g 250.00g 250.00g

[0040] Redispersible latex powder 10.00g 10.00g 10.00g 10.00g

[0041] Modified bentonite - 2.00g 3.00g 5.00g

[0042] Wood fiber 3.00g 3.00g 3.00g 3.00g

[0043] Cellulose ether 1.00g 1.00g 1.00g 1.00g

[0044] Pigment 14.00g 14.00g 14.00g 14.00g

[0045] Total 1000.00g 1000.00g 1000.00g 1000.00g

[0046] 2. Coating and outdoor observation

[0047] Mix the components of the above 1#, 2#, 3#, 4# formulations evenly, add 24% water, stir evenly with a mixer, and spread evenly on the outer wall board to make a coating; outdoor ob...

Embodiment 2

[0049] The following recipes add metakaolin and compare different amounts of metakaolin.

[0050] 1. Formula

[0051] 5# 6#

[0052] Portland cement (42.5R) 350.00g 350.00g

[0053] Heavy calcium (fineness ≥ 200) 200.00g 200.00g

[0054] River sand (40-70 mesh) 151.00g 158.00g

[0055] River sand (70-140 mesh) 250.00g 250.00g

[0056] Vinyl acetate / ethylene binary copolymer rubber powder 10.00g 10.00g

[0057] Modified bentonite 5.00g 5.00g

[0058] Wood fiber 3.00g 3.00g

[0059] Cellulose ether 1.00g 1.00g

[0060] Metakaolin (Basf MetaMax, Germany) 15.00g 8.00g

[0061] Polycarboxylate superplasticizer 1.00g 1.00g

[0062] Pigment 14.00g 14.00g

[0063] Total 1000.00g 1000.00g

[0064] 2. Coating and outdoor observation

[0065] Mix the components of the above 5# and 6# formulas evenly, add 24% water, stir evenly with a blender, and spread evenly on the outer wall board to make a coating; outdoor observation, if it is as good as figure 2 , 3...

Embodiment 3

[0067] 1. Formula

[0068] 7#

[0069] Portland cement (42.5R) 350.00g

[0070] Heavy calcium (fineness ≥ 200) 200.00g

[0071] River sand (40-70 mesh) 151.00g

[0072] River sand (70-140 mesh) 250.00g

[0073] Vinyl acetate / ethylene binary copolymer rubber powder 10.00g

[0074] Modified bentonite 5.00g

[0075] Wood fiber 3.00g

[0076] Cellulose ether 1.00g

[0077] Metakaolin 15.00g (domestic)

[0078] Polycarboxylate superplasticizer 1.00g

[0079] Pigment 14.00g

[0080] Total 1000.00g

[0081] 2. Coating and outdoor observation

[0082] Mix the components of the above 7# formula evenly, add 23% water, stir evenly with a blender, and spread evenly on the exterior wall board to make a coating; outdoor observation, as shown in the figure after one year Figure 4 shown by Figure 4 It can be seen that the coating obtained by the 7# formula has local efflorescence phenomenon. It can be seen that the activity of metakaolin also has ...

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Abstract

The invention provides an inside and outside walls facing mortar with little saltpetering phenomenon in use and less price; the facing mortar comprises the following components by weight percent: 30-40% of silicate cement, 15-25% of inert filler, 40-50% of sand, 1.0-2.0% of high active mineral filler and 3.0-5.0% of additives. The preparation method of the facing mortar of the invention adopts common silicate cement as cementitious material, and adds high active metakaolin with small particle size to react with excessful calcium hydroxide in the cement and obtain CSH gel so that the existing free Ca<2+> in the cement is greatly reduced, the compactibility of the facing mortar layer is increased and the external water is hard to enter; in addition, a defined amount of nanoscale water repellent agent is added in the mortar so that the channel of external water into the mortar is blocked, double barriers are formed between each other and the generation conditions of saltpetering can be well restrained. The facing mortar of the invention has reasonable formula, simple construction, and lower production cost which is greatly less than that of the existing anti-saltpetering mortar, thus being applicable to the inside and outside walls decoration of common houses or factories.

Description

technical field [0001] The present invention relates to a kind of mortar, especially relates to a kind of facing mortar which can decorate the inner and outer walls of buildings, and more specifically relates to a kind of inner and outer wall decoration which seldom occurs pan-alkaline phenomenon in the use process, and at the same time, the price is relatively low. surface mortar. Background technique [0002] Facing mortar is a new type of wall decoration material imported from abroad in my country. It is composed of inorganic cementitious materials, fillers and aggregates, and is used for decoration on the surface of building walls. Due to its light weight, air permeability, crack resistance and good weather resistance, and its coating thickness can reach 2-3mm, it is suitable for processing into various styles of textured surfaces. When applied to the surface of a layer, it will produce a pleasing effect that cannot be matched by a flat coating. Finishing mortar has wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B14/10C04B22/08C04B24/26C04B103/32
Inventor 洪永顺林华强佘晓燕陈超
Owner 广东龙湖科技股份有限公司
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