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Thickening powder for dry-mixed mortar and preparation method of thickening powder

The technology of dry powder mortar and thickening powder is applied in the field of thickening powder of dry powder mortar and its preparation. , the effect of improving construction and workability

Inactive Publication Date: 2019-12-24
宁波新广亿建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned existing technical solutions have the following defects: hydroxypropyl methylcellulose ether has a thickening effect and can improve the consistency of dry-mixed plastering mortar, but the thickened powder has an impact on the cohesiveness of dry-powdered plastering mortar Small, resulting in poor adhesion between the mortar and the wall

Method used

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  • Thickening powder for dry-mixed mortar and preparation method of thickening powder
  • Thickening powder for dry-mixed mortar and preparation method of thickening powder
  • Thickening powder for dry-mixed mortar and preparation method of thickening powder

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Effect test

Embodiment 1

[0035] Table 1 Each component and its quality of a thickened powder used in dry powder mortar

[0036] components mass (kg) components mass (kg) Lignocellulosic 20 Sodium lignosulfonate 80 Redispersible latex powder 30 calcium lignosulfonate 60 Sodium bentonite 400

[0037] The preparation method of this thickened powder specifically comprises the steps:

[0038] Step 1. After drying the powder material in the formula, weigh each material according to the formula amount, mix and stir the cellulose, bentonite, sodium lignosulfonate and calcium lignosulfonate;

[0039] Step 2. Add the redispersible latex powder into the mixture in step 1, and stir again to obtain the thickened powder.

Embodiment 2

[0041] Table 2 Each component and its quality of a thickened powder used in dry powder mortar

[0042] components mass (kg) components mass (kg) Lignocellulosic 25 Sodium lignosulfonate 100 Redispersible latex powder 40 calcium lignosulfonate 70 Sodium bentonite 380 Hydroxymethyl starch 50

[0043] Wherein the preparation method of hydroxymethyl starch is: 1) take by weighing 100g starch and join in the container, then add 30ml dehydrated alcohol, stir; 2) then add 20g sodium hydroxide and 22g sodium pyrophosphate, after stirring, static 3) Add 12g of sodium chloroacetate and stir evenly, then seal the container and let it stand for 30 hours; 4) Add the mixture in the container to the ball mill, add the ball milling medium, at 60°C, at 400r Ball milling at a speed of 1 / min for 90 min, after the ball milling, separate the mixture and the ball milling medium, then wash the mixture with ethanol with a mass fraction of 50% until there i...

Embodiment 3

[0048] Table 3 Each component and its quality of a thickened powder used in dry powder mortar

[0049] components mass (kg) components mass (kg) Lignocellulosic 30 calcium lignosulfonate 80 Redispersible latex powder 45 Hydroxymethyl starch 60 Sodium bentonite 430 polyvinyl alcohol 5 Sodium lignosulfonate 90

[0050] Wherein the preparation method of hydroxymethyl starch is with embodiment 2.

[0051] The preparation method of this thickened powder specifically comprises the steps:

[0052] Step 1. After drying the powder material in the formula, weigh each material according to the formula amount, mix and stir the cellulose, bentonite, sodium lignosulfonate, calcium lignosulfonate and hydroxymethyl starch;

[0053] Step 2. Mix the redispersible latex powder and polyvinyl alcohol evenly, then add it to the mixture in step 1, and stir again to obtain the thickened powder.

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Abstract

The invention relates to thickening powder for dry-mixed mortar and a preparation method of the thickening powder. The invention relates to the technical field of dry-mixed mortar. The thickening powder particularly includes the following components: 20-30 kg / t of cellulose, 30-45 kg / t of redispersible latex powder, 380-430 kg / t of bentonite, 80-100 kg / t of sodium lignosulphonate and 60-80 kg / t ofcalcium lignosulphonate. The thickening powder also comprises 50 to 70 kg / t of hydroxymethyl starch, 5 to 10 kg / t of polyvinyl alcohol, and 10 to 15 kg / t of polyacrylamide. The thickening powder prepared by the invention is added into the dry-mixed mortar, so that the consistency of the mortar can be ensured, and the binding power between the mortar and a wall body can be improved.

Description

technical field [0001] The invention relates to the technical field of dry powder mortar, in particular to a thickened powder for dry powder mortar and a preparation method thereof. Background technique [0002] Dry powder mortar is a mixture of cement, sand, mineral admixtures and functional additives in a certain proportion, uniformly mixed in a dry state in a professional production plant, and mixed in a granular or powder state, and then packaged in dry powder Or transported to the construction site in bulk, and the dry powder mortar material that can be used directly after adding water and mixing according to regulations. Thickened powder is a new type of non-lime and non-air-entraining water-retaining thickening filler. The thickened powder is easy to measure, non-radioactive and non-corrosive. The ratio can be adjusted appropriately for different raw materials to achieve the best effect. The thickened powder used for dry powder mortar has the characteristics of water...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38C04B103/44
CPCC04B40/0042C04B2103/44C04B24/383C04B24/18C04B2103/0057C04B22/08C04B24/38C04B24/2623
Inventor 张立周宇武王彬彬唐圳
Owner 宁波新广亿建材有限公司
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