Corn straw fiber enhanced fly ash polymer gel material and preparation method thereof

A technology of corn stalk fiber and cementitious material, which is applied in the direction of solid waste management, sustainable waste treatment, climate sustainability, etc., and achieves the effects of low price, simple preparation process and easy acquisition.

Inactive Publication Date: 2014-10-22
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Clearly, such treatment has become a public nuisance in many places

Method used

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  • Corn straw fiber enhanced fly ash polymer gel material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] a. Mix sodium hydroxide and liquid sodium water glass to control its modulus M (SiO 2 ) / n(Na 2 O) is 1.5, made into an alkali activator, and aged for 24 hours for later use.

[0033] b. Incorporate the alkali activator into the fly ash, the Na introduced by the alkali activator 2 The mass percentage of O in fly ash is 10%, which is used to excite fly ash; the water-cement ratio of the control system is 0.4, and the sample is obtained.

[0034] c. Curing the sample at room temperature for 28 days to obtain the fly ash geopolymer cementitious material.

Embodiment 2

[0036]a. Dry the corn stalk fiber in an oven, dry it at room temperature, cut it into 2-4 cm long sections, and tap the fiber to remove the pectin on the surface of the fiber. Then use 1% NaOH lye to impregnate the fibers at a temperature of 60-80°C, then rinse with distilled water, and finally dry in an oven at a temperature of 80-90°C until the moisture content is about 5-10%, and store in a sealed bag spare.

[0037] b. Mix sodium hydroxide with liquid sodium water glass, control its modulus to 1.5, make alkali activator, and age for 24 hours before use.

[0038] c. Incorporate the alkali activator into the fly ash, the Na introduced by the alkali activator 2 O accounts for 10% of the mass percentage of fly ash and is used to stimulate fly ash; the water-cement ratio of the control system is 0.4; then the preserved corn stalk fiber is mixed into the previous mixture, and the fiber accounts for 1 mass percent of the mixture. %, the sample is obtained.

[0039] d. Curing t...

Embodiment 3

[0040] The rest of the conditions and steps of Example 3 are the same as in Example 2, except that the mass fraction of fiber in the mixture in step c is 2%.

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Abstract

The invention discloses a corn straw fiber enhanced fly ash polymer gel material and a preparation method thereof. In the preparation method, the corn straws are mixed into an alkali-excited fly ash polymer gel material, and then the mixture is subjected to certain maintenance conditions so as to enable the material system to have good properties. The corn straw, namely a waste which has not been effectively utilized, is used to enhance a poly gel material prepared from an industrial waste fly ash. A novel way is provided for waste utilization, the environment burden is relieved, the energy consumption is reduced, and the material performances are strengthened. The corn straw fiber enhanced fly ash polymer gel material is an unfired and clinker-free material, is a zero-carbon-emission environment-friendly engineering material, is according with the social development trend, and has a good social benefit and economic benefit.

Description

technical field [0001] The invention belongs to the field of civil engineering and building material manufacturing, and relates to a geopolymer cementitious material improved by plant fibers. Background technique [0002] Cement is a traditional cementitious material, which has made great contributions to human economic development and social progress. However, due to its high resource consumption, high energy consumption, high carbon emissions, and other serious environmental pollution, it is increasingly incompatible with the current The requirements of the sustainable development strategy, therefore, countries are also developing new green gelling materials one after another. Geopolymers (geopolymers) are a new class of alkali-activated gelling materials discovered by French scientists DavidovitsJ. et al. in the late 1970s. It is a new type of inorganic polymer material formed by mixing with alkaline silicate solution and forming and curing at 20-120°C under the excitati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/24
CPCY02W30/91
Inventor 朱志铎陈武吴昌胜
Owner SOUTHEAST UNIV
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