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A kind of mixing method for preparing geopolymer cement soil

A geopolymer and cement-soil technology, applied in cement production and other directions, can solve problems such as affecting the performance of cement-soil, unable to ensure the uniform mixing of cement, geopolymer and soft soil, etc., so as to reduce engineering construction costs and solve the phenomenon of agglomeration. , the effect of improving strength and failure strain

Active Publication Date: 2020-07-03
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] So far, it is impossible to ensure that cement, geopolymer and soft soil are evenly mixed, and uneven mixing will affect the various properties of geopolymer cement soil

Method used

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  • A kind of mixing method for preparing geopolymer cement soil
  • A kind of mixing method for preparing geopolymer cement soil
  • A kind of mixing method for preparing geopolymer cement soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Raw material preparation

[0025] 500g of dry soil, spray wet with optimal moisture content, soak for a day and night.

[0026] Flake NaOH 3.15g, dissolve NaOH solid in water to make a solution with a concentration of 50%.

[0027] Water glass solution 18.15g, the water glass solution after weighing is poured into NaOH solution, is configured as alkali activator.

[0028] 60g of cement is 42.5 grade ordinary Portland cement.

[0029] Metakaolin 15g.

[0030] The mixing ratio chosen for this test is 3% of metakaolin and 12% of cement. Made into a cube specimen of 70.7×70.7×70.7mm

[0031] The first comparison method is dry soil mixing, and the geopolymer is prepared first, and then the geopolymer is poured into the dry soil.

[0032] The second comparison method is wet soil mixing, and the geopolymer is prepared first, and the geopolymer is poured into the wet soil.

[0033] The following table shows the mixing method of geopolymer cement soil

[0034]

[0035]...

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Abstract

The invention discloses a mixing method for preparing geopolymer cement soil. The mixing method comprises the following steps of drying, crushing and sieving a soil body firstly during preparation, then performing spraying humidification with an optimum moisture content, performing uniform mixing and infiltration for one day and night, adding metakaolin in wet soil, performing uniform mixing, preparing an alkali activator, spraying the alkali activator into the wet soil, performing uniform mixing, performing standing for 10mins, adding cement in the soil body, performing uniform mixing, and finally, spraying cement into the wet soil with a corresponding water-cement ratio for uniform mixing, wherein the alkali activator is prepared by mixing a NaOH solution with the concentration being 50percent and sodium water glass.

Description

technical field [0001] The invention relates to a mixing method for preparing geopolymer, especially the application of geopolymer partially replacing cement. The invention achieves the uniformity of mixing through the preparation of geopolymer in mixing with soil and the mixing method of different materials. [0002] technical background [0003] So far, the mixing method of solidified soil varies greatly due to different materials. Mo Zhang studied the content of metakaolin when studying the mechanical properties of geopolymer-solidified soil. First, he prepared an alkali activator, then mixed the alkali activator with metakaolin to produce a geopolymer precursor, and finally mixed the geopolymer Mix the precursor and the soil evenly to make a sample. [0004] When Gao Changhui studied the mechanical properties of cement mortar solidified soil, he first configured the soil according to the optimal moisture content and infiltrated it for a whole day and night, then added s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B12/00
CPCC04B12/005Y02P40/10
Inventor 马芹永洪宏马冬冬高常辉
Owner ANHUI UNIV OF SCI & TECH
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