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Reinforced concrete admixture and preparation method thereof

A concrete and reinforced technology, applied in the field of building materials, can solve the problems of concrete workability and adverse effects of early strength

Inactive Publication Date: 2021-05-28
KZJ NEW MATERIALS GROUP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that the waste stone powder waste mentioned in the above background technology is directly mixed in the concrete, the workability and early strength of the concrete will be greatly adversely affected, the present invention provides a reinforced concrete admixture, Including modified marble-slag powder, silica fume and early strength agent;

Method used

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  • Reinforced concrete admixture and preparation method thereof
  • Reinforced concrete admixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Preparation of grinding aid: 50.00g of triethanolamine, 50.00g of triethylenepropanolamine, 60.00g of molasses, urea solution (16.00g of urea, 84.00g of water), glycerin (2.00g of glycerin, 98.00g of water), drip Add it into 640.00g of water for reaction, raise the temperature to 50°C for reaction, and add it dropwise for 1 hour to obtain a grinding aid.

[0034] (2) Preparation of modified marble-slag powder: Add 3500g of waste marble stone powder, 1500g of granulated blast furnace slag powder and 1.00g of grinding aid into a ball mill, grind for 20 minutes, and keep the process at 60°C to obtain modified marble-slag powder ;The specific surface area is 1100m 2 / kg, the water demand ratio is 82%, and the 28d strength activity index is 95%.

[0035] (3) Preparation of early strength agent: Mix 100.00 g of sodium sulfate, 2.00 g of carboxymethyl cellulose, 2.00 g of hydroxyethyl cellulose, and 2.00 g of sodium dodecylsulfonate to prepare an early strength agent.

...

Embodiment 2

[0042] (1) Grinding aid preparation: N, N dimethylethanolamine 60.00g, diethanol monoisopropanolamine 40.00g, molasses 70.00g, urea solution (urea 20.00g, water 80.00g), glycerin (glycerin 2.50g , water 97.50g), added dropwise into 630.00g water to react, heated up to 45°C for reaction, and the dropwise addition time was 0.75h to obtain a grinding aid.

[0043] (2) Preparation of modified marble-slag powder: Add 3500g of waste marble stone powder, 1500g of granulated blast furnace slag powder and 1.20g of grinding aid into a ball mill, grind for 25 minutes, and keep the process at 60°C to obtain modified marble-slag powder ;The specific surface area is 1150m 2 / kg, the water demand ratio is 83%, and the 28d strength activity index is 98%.

[0044] (3) Preparation of early strength agent: 100.00 g of calcium sulfate, 1.00 g of carboxymethyl cellulose, 1.00 g of hydroxypropyl cellulose, and 1.00 g of triterpene saponins were mixed to prepare an early strength agent.

[0045] (4)...

Embodiment 3

[0051] (1) Grinding aid preparation: 60.00g of N,N-dibenzylethanolamine, 20.00g of diethanolamine, 20.00g of diethanol monoisopropanolamine, 70.00g of molasses, urea solution (20.00g of urea, 80.00g of water) 1. Glycerin (3.50 g of glycerol, 96.50 g of water), was added dropwise into 630.00 g of water for reaction, and the temperature was raised to 45° C. for reaction, and the dropwise addition time was 1.5 h to obtain a grinding aid.

[0052] (2) Preparation of modified marble-slag powder: Add 3500g of waste marble stone powder, 1500g of granulated blast furnace slag powder and 1.50g of grinding aid into a ball mill, grind for 25 minutes, and keep the process at 60°C to obtain modified marble-slag powder ; The specific surface area is 1180m 2 / kg, the water demand ratio is 80%, and the 28d strength activity index is 93%.

[0053] (3) Preparation of early strength agent: 100.00 g of sodium sulfate, 1.60 g of carboxymethyl cellulose, 1.40 g of hydroxyethyl methyl cellulose, 1....

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Abstract

The invention relates to the technical field of building materials, in particular to a reinforced concrete admixture and a preparation method thereof.The reinforced concrete admixture comprises modified marble-slag powder, silica fume and an early strength agent; wherein the modified marble-slag powder is prepared by grinding a marble raw material, slag powder and a grinding aid; the grinding aid is prepared by the following steps: dropwise adding alcohol amine, molasses, urea and glycerol into water for reaction, and obtaining the grinding aid after the reaction is finished, the specific surface area of the modified marble-slag powder is 1000-1200 m<2> / kg, the water demand ratio is less than 85%, and the 28d strength activity index is greater than 90%. According to the reinforced concrete admixture provided by the invention, waste marble stones can be recycled in concrete, the stability and the later strength of the concrete can be ensured, the problem of treatment of stone powder wastes is solved, cheap raw materials can be provided for the concrete, and the reinforced concrete admixture has huge economic benefits and wide market application values.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a reinforced concrete admixture and a preparation method thereof. Background technique [0002] With the development and progress of modern science and technology, the scale of basic engineering construction is expanding day by day, and modern construction projects are developing towards high-rise, super high-rise, and long-span frame projects. The demand for concrete is increasing, and the pumping of concrete, anti-segregation, etc. Performance requirements are getting higher and higher. [0003] In recent years, with the continuous improvement of modern construction technology, the increase of labor costs, and the vigorous promotion of prefabricated buildings, high requirements have been placed on the early strength of prefabricated concrete, which will directly affect the production efficiency of concrete prefabricated components. [0004] Some people in China have...

Claims

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Application Information

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IPC IPC(8): C04B24/38
CPCC04B40/0039C04B24/122C04B18/18C04B24/126C04B24/02C04B14/285C04B18/141C04B22/147C04B24/383C04B24/16C04B22/143C04B24/10C04B24/32
Inventor 李伟腾林添兴陈晓彬
Owner KZJ NEW MATERIALS GROUP CO LTD
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