Dextrin mortar composite material based on waste mineral powder and its preparation method

A composite material, dextrin technology, applied in the field of building materials, can solve problems such as waste of resources

Active Publication Date: 2021-05-14
SHAANXI SCI TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing studies either only focus on glutinous rice mortar or lime, and apply its gelling effect individually, which wastes resources

Method used

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  • Dextrin mortar composite material based on waste mineral powder and its preparation method
  • Dextrin mortar composite material based on waste mineral powder and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0040] This embodiment provides a method for preparing a dextrin mortar composite material based on waste ore powder, which is specifically implemented according to the following steps:

[0041] Step 1, take the following raw materials respectively by mass fraction:

[0042] Lime 20.1%, dextrin slurry 10.7%, mineral powder 12.6%, activator 1.2%, water 8.2%, sand 47.2%;

[0043] Among them, the activator is composed of sodium hydroxide and sodium silicate with a mass ratio of 1:2, the quality of the activator is 10% of the mass of mineral powder, and the mineral powder is 62.5% of the mass of lime; the dextrin slurry is composed of dextrin and water Composition with a mass ratio of 1:5.3;

[0044] Step 2. Preparation of gelling material A: Pour the activator and mineral powder into container A, add water and stir evenly, and leave for 1 minute to obtain gelling material A;

[0045] Step 3. Preparation of gelling material B: Pour the dextrin slurry and lime into container B, s...

Embodiment 2

[0048] This embodiment provides a kind of preparation method of the dextrin mortar composite material based on waste mineral powder, and this method is the same as embodiment 1, and difference is:

[0049] The raw materials weighed are lime 20%, dextrin slurry 4.2%, mineral powder 13.4%, activator 1.0%, water 7.0%, sand 54.4%;

[0050] Among them, the quality of the activator is 8% of the mass of the mineral powder; the mineral powder is 68.9% of the mass of the lime; the dextrin slurry is composed of dextrin and water with a mass ratio of 1:11.5;

[0051] The gelling material A was prepared in step 2, and stood for 2.5 minutes; the gelling material B was prepared in step 3, and stood for 3.5 minutes.

Embodiment 3

[0053] This embodiment provides a kind of preparation method of the dextrin mortar composite material based on waste mineral powder, and this method is the same as embodiment 1, and difference is:

[0054] The raw materials weighed are lime 31.6%, dextrin slurry 4.2%, mineral powder 10.5%, activator 1.1%, water 10.5%, sand 42.1%;

[0055] Among them, mineral powder is 33.3% of lime mass; dextrin slurry is composed of dextrin and water with a mass ratio of 1:5.3;

[0056] The gelling material A is prepared in step 2 and left for 2 minutes; the gelling material B is prepared in step 3 and left for 2 minutes.

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Abstract

The invention discloses a dextrin mortar composite material based on waste mineral powder, which is composed of the following raw material components according to the mass fraction, lime 20%-32%, dextrin slurry 4.2%-14.2%, mineral powder 10.4%-16.7%, excitation 1.0% to 1.7% of agent, 7.5% to 10.8% of water, 20.9% to 56.9% of sand; the invention also discloses the preparation method of the composite material. First, the following raw materials are weighed according to the mass fraction: 20% to 32% of lime, Dextrin slurry 4.2%-14.2%, mineral powder 10.4%-16.7%, activator 1.0%-1.7%, water 7.5%-10.8%, sand 20.9%-56.9%; For material B, the cementitious material A and cementitious material B are mixed, and sand is added until they are evenly stirred to obtain a dextrin mortar composite material based on waste mineral powder. The preparation method of the invention is simple and easy to implement; the prepared composite material not only has high strength, but also effectively utilizes waste mineral powder, saves resources, and is beneficial to green development.

Description

technical field [0001] The invention belongs to the technical field of building materials, and relates to a dextrin mortar composite material based on waste mineral powder, and also relates to a preparation method of the composite material. Background technique [0002] Ultrafine mineral powder has potential activity and is mainly used as admixture of concrete minerals. At present, many studies use ultra-fine mineral powder to partially or completely replace cement. With the rapid development of mineral powder industry in the past ten years, the production of mineral powder is huge, but the utilization rate of mineral powder is low and the utilization area is narrow. [0003] The traditional glutinous rice mortar is formed by adding glutinous rice juice to lime, loess and sand. The study found that the glutinous rice in the traditional glutinous rice mortar has the characteristics of an organic template in biomineralization, which can change the microstructure of calcium c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/10
Inventor 王赟
Owner SHAANXI SCI TECH UNIV
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