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Additive for improving performance of phosphogypsum cement-based wet-mixed mortar, and preparation method thereof

A wet-mixed mortar and admixture technology, which is applied in the field of building materials, can solve problems such as the inability to meet the performance requirements of phosphogypsum cement-based wet-mixed mortar, and achieve the effect of increasing construction workability

Pending Publication Date: 2021-07-13
贵州宇昆环保建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The embodiment of the present application provides an admixture and a preparation method for improving the performance of phosphogypsum cement-based wet-mix mortar, so as to at least solve the problem that existing wet-mix mortar admixtures cannot meet the performance requirements of phosphogypsum cement-based wet-mix mortar

Method used

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  • Additive for improving performance of phosphogypsum cement-based wet-mixed mortar, and preparation method thereof
  • Additive for improving performance of phosphogypsum cement-based wet-mixed mortar, and preparation method thereof

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preparation example Construction

[0028] This embodiment also provides a preparation method of phosphogypsum cement-based wet-mix mortar admixture, the specific steps are as follows:

[0029] Step 1: Stir and mix the thickened water-retaining component and the retarding component in a dry powder state and set aside.

[0030] Step 2: Add the water-reducing component and the viscosity modifier component in the formula into the water, stir at 400r / min-450r / min for 3-5min, then reduce the speed to 250-300r / min and stir for 10-15min. Add the evenly mixed powder prepared in step 1.

[0031] Step 3: Add the defoaming component in the formula, and continue to stir at the above stirring speed for 3-5 minutes.

[0032] Step 4: Add the air-entraining component in the formula, reduce the speed to 100-120r / min and stir for 8-10 minutes to get the finished product.

[0033] This embodiment also provides a method for using the above-mentioned admixture. In the method, the amount of the admixture in the phosphogypsum cement...

Embodiment 1

[0037] Preparation of an admixture for improving the performance of phosphogypsum cement-based wet-mix mortar:

[0038] Weigh 3g of hydroxypropyl methylcellulose ether, 0.3g of starch ether, 1g of dispersible latex powder, 40g of sodium gluconate, 10g of citric acid, 10g of sodium hexametaphosphate, and 3g of white sugar, and mix and stir evenly in a dry powder state; Take 896.5g of water and put it into a beaker, add 25g of polycarboxylate superplasticizer and 2g of viscosity modifier, stir at 400r / min for 5min; reduce the speed to 300r / min, add the above-mentioned uniformly mixed powder, and continue stirring for 15min. Add 0.2 g of polyether defoamer, and continue stirring for 3 min at 300 r / min. Reduce the speed to 100r / min, add 1g of triterpene saponin and 8g of liquid air-entraining agent, and continue stirring for 10min to obtain the finished product.

Embodiment 2

[0040] Preparation of an admixture for improving the performance of phosphogypsum cement-based wet-mix mortar:

[0041] Weigh 4g of hydroxypropyl methylcellulose ether, 0.6g of starch ether, 1g of dispersible latex powder, 40g of sodium gluconate, 10g of citric acid, 10g of sodium hexametaphosphate, and 3g of white sugar, and mix and stir evenly in a dry powder state; Take 885.2g of water and put it into a beaker, add 35g of polycarboxylate superplasticizer and 2g of viscosity modifier, stir at 400r / min for 5min; reduce the speed to 300r / min, add the above-mentioned uniformly mixed powder, and continue stirring for 15min. Add 0.2 g of polyether defoamer, and continue stirring for 3 min at 300 r / min. Reduce the speed to 100r / min, add 1g of triterpene saponin and 8g of liquid air-entraining agent, and continue stirring for 10min to obtain the finished product.

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Abstract

The invention discloses an additive for improving the performance of phosphogypsum cement-based wet-mixed mortar, and a preparation method thereof. The additive is prepared from, by weight, 2.0-4.0% of a water reducing component, 0.6-1.0% of a thickening and water retention component, 4.0-7.5% of a retarding component, 0.5-1.0% of an air entraining component, 0.01-0.02% of a defoaming component, 1-3% of a viscosity modifier component and 83.48-91.89% of water. The problem that the existing wet-mixed mortar admixture cannot meet the performance requirements of the phosphogypsum cement-based wet-mixed mortar is solved, and the construction workability, the tensile bonding strength, the durability and the water retention rate of the phosphogypsum cement-based wet-mixed mortar are integrally and effectively improved.

Description

technical field [0001] The present application relates to the field of building materials, in particular to an admixture and a preparation method for improving the performance of phosphogypsum cement-based wet-mixed mortar. Background technique [0002] Phosphogypsum is the solid waste generated during the production of phosphoric acid by the wet-process phosphoric acid production process. Every ton of phosphoric acid produced will produce 4.5-5.5 tons of phosphogypsum. my country produces more than 50 million tons of phosphogypsum every year, and the current comprehensive utilization rate is only about 20%. The phosphogypsum that has not been comprehensively utilized is disposed of in a centralized storage yard. The investment in the storage yard is huge, and the operating costs are high. The most important thing is that the residual acidic wastewater in phosphogypsum will seep into the ground, causing great environmental pollution. Phosphogypsum cement-based wet-mix mortar...

Claims

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Application Information

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IPC IPC(8): C04B24/38C04B28/14
CPCC04B40/0039C04B28/143C04B2201/10C04B2201/50C04B2201/20C04B24/383C04B24/023C04B24/10C04B24/06C04B22/16C04B24/00C04B24/32C04B2103/0057C04B2103/302C04B2103/0068C04B2103/304C04B7/02C04B14/06
Inventor 周远忠王宏杰王宪亮彭刚范岭陈鸿
Owner 贵州宇昆环保建材有限公司
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