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Dry powder mortar additive suitable for novel wall material and preparation method thereof

A technology for wall material and dry powder mortar, which is applied in the field of mortar admixture and its preparation, environment-friendly and high-efficiency dry powder mortar admixture and its preparation field, can solve the problems of less utilization of lignosulfonate, complicated production process, etc., and achieves high performance The effect of excellent price ratio, good water solubility and low production cost

Inactive Publication Date: 2009-03-25
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

"Concrete" No. 9, 2003 "Experimental Research on Preparation of Composite Mortar Admixture by Calcium Lignosulfonate Modification" by combining modified calcium lignosulfonate with modified rosin soap, surfactant, early strength agent, etc. Compounding to prepare mortar admixture suitable for ordinary concrete small hollow blocks, autoclaved lime sand bricks and fly ash aerated concrete blocks, the production process is complicated, and the utilization of lignin sulfonate is less

Method used

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  • Dry powder mortar additive suitable for novel wall material and preparation method thereof
  • Dry powder mortar additive suitable for novel wall material and preparation method thereof
  • Dry powder mortar additive suitable for novel wall material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Take 1000g of magnesium lignosulfonate, add water to make a solution with a concentration of 40%, add NaOH solution to adjust the pH value of the system to 8.0, add 100g of urea, 150g of formaldehyde, heat to a certain operating temperature while stirring, and the operating temperature is controlled at 95 °C, react for 1 hour; add H 2 SO 4 Adjust the pH value of the system to 6.0, adjust the reaction temperature, and react at 90°C for 2 hours; add 50g of potassium permanganate, and react at 90°C for 2 hours. After cooling, the liquid product of the mortar admixture of the present invention can be obtained and sprayed Drying can obtain the powdery product of the present invention.

Embodiment 2

[0035] Take 1000g of sodium lignosulfonate, add water to make a solution with a concentration of 50%, add NaOH solution to adjust the pH value of the system to 11.0, add 50g of urea and 100g of formaldehyde, heat to a certain operating temperature while stirring, and control the operating temperature at 85 °C, react for 1 hour; add H 2 SO 4 Adjust the pH value of the system to 5.0, adjust the reaction temperature, and react at 80°C for 3 hours; add 80g of calcium perchlorate, adjust the reaction temperature, and react at 70°C for 1 hour, and the liquid of the mortar admixture of the present invention can be obtained after cooling The product can be spray-dried to obtain the powdered product of the present invention.

Embodiment 3

[0037] Take 1000g of calcium lignosulfonate, add water to make a solution with a concentration of 30%, add NaOH solution to adjust the pH value of the system to 9.0, add 150g of urea and 200g of formaldehyde, heat to a certain operating temperature while stirring, and control the operating temperature at 80°C , reacted for 2 hours; added H 2 SO 4Adjust the pH value of the system to 4.0, adjust the reaction temperature, and react at a temperature of 100°C for 2 hours; add 100g of potassium dichromate, heat up to 85°C and react for 1.5 hours, and the liquid product of the mortar admixture of the present invention can be obtained after cooling , spray drying can obtain the powder product of the present invention.

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Abstract

The invention discloses an environment friendly dry mortar admixture applicable to novel wall materials, and a preparation method thereof. The method comprises the steps: (1) lignosulphonate is added with water and mixed uniformly, the system pH value is adjusted to be 8.0 to 11.0, urea and formaldehyde are added, and the mixture reacts for 1 to 2 hours at the temperature of 80 to 100 DEG C; (2) the system pH value is adjusted to be 4.0 to 6.0, and the mixture reacts for 2 to 3 hours at the temperature of 80 to 100 DEG C; and (3) an oxidant is added, the mixture reacts for 1 to 2 hours at the temperature of 70 to 90 DEG C and is cooled to obtain the liquid product of the mortar admixture, and the powder product of the mortar admixture can be obtained after spray drying. The mortar admixture has simple preparation process and low production cost, is environment-friendly as the papermaking and pulping by-product, lignosulphonate, is taken as raw material, has high water reduction rate, appropriate retardation and air-entraining performance, and can cause the mortar to have good cohesiveness, anti-cracking and impermeability.

Description

technical field [0001] The invention relates to an environmentally friendly high-efficiency dry powder mortar admixture suitable for new wall materials and a preparation method thereof, belonging to the field of building materials; more specifically, it is based on lignosulfonate, a recovered product of acid pulping waste liquid. Raw materials, a mortar admixture prepared through modification and a preparation method thereof. Background technique [0002] The use of new wall materials to replace clay solid bricks can improve building functions, promote technological progress in the construction industry, save energy, and have important significance in waste utilization and environmental protection. In the popularization and use of new wall materials, whether it is a load-bearing wall or a filled wall in a frame structure, there are generally serious wall cracking and leakage problems, which seriously affects the quality of the project and normal use, and also seriously restr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/18
CPCC04B2103/302C04B24/307C04B24/18C04B28/02
Inventor 邱学青庞煜霞楼宏铭周明松欧阳新平
Owner SOUTH CHINA UNIV OF TECH
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