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Method for modifying raw soil material by utilizing starch residue

A technology of starch residue and permanent soil, which is applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve problems such as difficult storage and transportation, environmental pollution, easy corruption and deterioration, and achieve strength improvement and preparation The process is simple and the raw soil blocks are dense

Active Publication Date: 2015-12-16
TIANJIN CHENGJIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a by-product of the starch production process, starch residue is not easy to store and transport, easy to spoil and deteriorate, and pollutes the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh and mix 5400g of northwest loess and 540g of lime in proportion to obtain a mixture; dry and grind 108g of sweet potato dregs, finally add 1620g of water, and boil to obtain sweet potato dregs slurry; weigh 27g of polycarboxylate superplasticizer, 27g Sodium sulfate, and add it to the sweet potato slag slurry, mix evenly to obtain a mixed solution; add the prepared mixed solution to the mixture, and stir vigorously; send the wet-mixed mixture into the vacuum mud mixer for mud refining , extrusion molding. The formed block is naturally dried and cured for 28 days to obtain the finished product. The mechanical strength and water resistance of the obtained raw soil blocks were tested, and the flexural strength was 2.1MPa, the compressive strength was 9.1MPa, and the softening coefficient was 0.61.

Embodiment 2

[0031] Weigh and mix 5400g of northwest loess, 540g of cement, and 270g of lime in proportion to obtain a mixture; dry and grind 81g of potato dregs, finally add 1680g of water, and boil to obtain a slurry of potato dregs; weigh 27g of naphthalene-based water reducer , weigh again 13.5g sodium silicate, 13.5g calcium chloride is configured as activator, and it is added in the potato residue slurry, mixes evenly to obtain mixed solution; Adds the prepared mixed solution in the mixed material, vigorously stirs evenly; Send the wet-mixed mixture into the vacuum mud mill and extrude the mud. The formed block is naturally dried and cured for 28 days to obtain the finished product. The mechanical strength and water resistance of the obtained raw soil blocks were tested, and the flexural strength was 2.6MPa, the compressive strength was 10.5MPa, and the softening coefficient was 0.93. Comparative example 2

Embodiment 3

[0034] Weigh and mix 5400g northwest loess, 540g cement, 270g lime, and 270g building gypsum in proportion to obtain a mixture; dry and grind 54g of kudzu vine dregs, finally add 1960g of water, and boil to obtain kudzu vine dregs slurry; Put the kudzu slag slurry into the mixture, and stir it vigorously; send the wet-mixed mixture into the vacuum mud mill to refine the mud, and then extrude it into shape. The formed block is naturally dried and cured for 28 days to obtain the finished product. The mechanical strength and water resistance of the obtained raw soil blocks were tested, and the flexural strength was 2.8MPa, the compressive strength was 11.3MPa, and the softening coefficient was 0.88.

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Abstract

The invention relates to the fields of building materials and environment-friendly energy-saving new materials, in particular to a method for modifying a raw soil material by utilizing a starch residue. The method comprises the following steps: (1) weighing raw soil and an inorganic cementing material according to a certain proportion, and uniformly mixing the weighed raw soil and inorganic cementing material to obtain a mixture; (2) drying the starch residue, grinding the dried starch residue into powder, weighing the powder according to a certain proportion, and adding water for boiling, so as to obtain a slurry; (3) weighing an admixture according to a certain proportion, and uniformly mixing the weighed admixture with the slurry obtained in step (2) to obtain a mixed liquid; (4) adding the mixed liquid obtained in step (3) into the mixture obtained in step (1) for powerful and uniform stirring, feeding the wet mixed material into a vacuum pug mill for pugging, and carrying out extrusion molding, wherein the mass of water accounts for 22-30% of the total solid mass; (5) naturally drying and curing the raw soil material molded through extrusion in step (4) for 28 days. The method is simple in preparation process; the modified raw soil material belongs to low-cost environment-friendly new building materials; the raw materials utilized in the preparation process are wide in source, so that the costs of the raw materials and transportation are greatly reduced.

Description

technical field [0001] The invention relates to the fields of building materials and new materials for environmental protection and energy saving, in particular to a method for modifying raw soil materials by utilizing starch slag. Background technique [0002] With the advancement of my country's new urbanization, raw soil materials, as a traditional building material that can be recycled and have excellent thermal insulation properties, have attracted people's attention again. At present, most raw soil materials use cement, lime, industrial waste, etc. as cementing materials, and then add natural plant fibers as reinforcing materials to improve their performance. As a by-product of the starch production process, starch residue is not easy to store and transport, easy to spoil and deteriorate, and pollutes the environment. Starch slag contains a large amount of starch and fiber. When starch slag is used as a reinforcing material to prepare raw soil blocks, the starch and p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/12C04B28/00C04B28/14C04B28/26C04B18/24B28B3/20
CPCY02W30/91
Inventor 刘志华李园枫曲烈荣辉
Owner TIANJIN CHENGJIAN UNIV
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