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Wet-mixed mortar and preparation process

A technology of wet-mixing mortar and preparation technology, which is applied in the field of building materials, can solve the problems of high production cost and low utilization value, and achieve the effect of improving performance, simple steps, and solving the problems of stacking and pollution

Active Publication Date: 2020-10-30
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another method is to use alkali slag to produce β-type hemihydrate gypsum for construction, but this method has high production cost and little utilization value

Method used

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  • Wet-mixed mortar and preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] This example provides a kind of wet-mixed mortar, and described wet-mixed mortar comprises the preparation raw material of following parts by weight:

[0040] Modified alkali residue: 5-90 parts,

[0041] Cement: 180-210 parts,

[0042] River sand: 1250~1300 parts,

[0043] Limestone powder: 5-90 parts,

[0044] Water reducer: 2 to 3 parts,

[0045] Water: 210-240 parts.

[0046] Wherein, the water content of the modified alkali slag is 40-50%.

[0047] The preparation method of the modified alkali slag is as follows: adding anhydrous sodium carbonate and water into the alkali slag, stirring and reacting, and suctioning to obtain the product.

[0048] The mass ratio of anhydrous sodium carbonate, water and alkali slag is (11-18): (250-300): (200-220). The stirring reaction time is 0.5-1h. The cement is PO52.5 ordinary Portland cement.

[0049] The water reducer is a polycarboxylate water reducer, and the polycarboxylate water reducer includes PC-50, LDS-850 and ...

Embodiment 2

[0051] This example provides a preparation process of wet-mixed mortar, the process is as follows figure 1 As shown, the steps include:

[0052] S1: Weigh each preparation raw material according to the proportion, add part of the water reducing agent and water into the modified alkali slag and mix evenly to obtain the alkali slag solution;

[0053] S2: mixing cement, river sand and limestone powder to obtain a solid mixture;

[0054] S3: mixing the alkali slag solution in step S1 and the solid mixture in step S2 to obtain a gelled material;

[0055] S4: After adding the remaining water reducer to the cementitious material in step S3 and mixing evenly, pour the slurry into the mold, remove the mold after the first curing at room temperature, and continue the second curing to obtain the wet-mixed mortar.

[0056] Part of the water reducer in step S1 refers to PC-50, and the remaining water reducer in step S4 refers to LDS-10N and LDS-850.

[0057] The time for the first curin...

Embodiment 3

[0059]In this example, a kind of wet-mixed mortar is prepared by adopting the preparation process provided in Example 2, and the preparation raw materials include:

[0060] Modified alkali slag: 5 parts, PO52.5 ordinary portland cement: 210 parts, river sand: 1300 parts, limestone powder: 85.5 parts, water reducing agent: 3 parts, water: 210 parts.

[0061] The mechanical properties and durability of the prepared wet-mixed mortar were tested, and the ordinary wet-mixed mortar was used as a comparison. The results are shown in Table 1 and Table 2.

[0062] The mechanical performance index of the wet-mixed mortar prepared in the embodiment 3 of table 1

[0063]

[0064] The durability performance index of the wet-mixed mortar prepared by the embodiment 3 of table 2

[0065]

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Abstract

The embodiment of the invention provides wet-mixed mortar and a preparation process thereof. According to the wet-mixed mortar, alkaline residues are used as preparation raw materials, solid waste generated in the alkali production industry can be consumed, the problem that the alkaline residues cannot be effectively treated for a long time is solved, the modified alkaline residues are used as admixtures, the problems of stacking and pollution of solid waste of an alkali production plant are solved, meanwhile, the performance of the wet-mixed mortar is improved, and the production cost of thewet-mixed mortar is reduced. The solid waste alkaline residues are adopted as a base, a polycarboxylic acid high-performance dispersing agent and anhydrous sodium carbonate are added for composite modification, and when the wet-mixed mortar is doped for use, the wet-mixed mortar not only has improved strength, but also has very good water retention performance, and is building wet-mixed mortar with excellent construction performance and mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a wet-mixed mortar and a preparation process. Background technique [0002] As an important basic chemical raw material, soda ash is widely used in metallurgy, building materials, papermaking, medicine, chemical industry, food and other industries. Due to the characteristics of the ammonia soda ash production process, about 0.3 tons of soda residue needs to be discharged for every ton of soda ash produced. A factory with an annual output of 800,000 tons of soda ash discharges about 240,000 tons of waste residue every year. At present, the annual output of soda ash in the world is about 30 million tons, of which the ammonia soda method is about 20 million tons, and nearly 20 million cubic meters of alkali slag is produced every year. If such a large amount of alkali slag is not properly treated and utilized for a long time, it will occupy the land, pollute ...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B20/02C04B18/04C04B111/20
CPCC04B28/04C04B20/023C04B2201/50C04B2111/20C04B14/068C04B14/28C04B2103/302C04B18/0463Y02W30/91
Inventor 李从波杨斯豪
Owner GUANGZHOU UNIVERSITY
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