Preparation method of layered cement and mswi bottom ash alkali-activated double gelling system material

A technology of alkali excitation and cement glue, which is applied in the direction of cement production, etc., can solve the problems of incompatibility between cement and MSWI bottom ash alkali excitation materials, and the inability to develop cement and MSWI bottom ash alkali excitation materials, etc., to achieve significant environmental benefits and social benefits. benefits, slowing down excessive consumption, and eliminating compatibility issues

Active Publication Date: 2021-10-22
ANHUI UNIV OF SCI & TECH
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Problems solved by technology

However, studies have shown that the hydration reaction mechanism of cement materials is completely different from the polymerization reaction mechanism of alkali-activated materials, resulting in incompatibility between cement and MSWI bottom ash alkali-activated materials, and the advantages of cement and MSWI bottom ash alkali-activated materials cannot be brought into play

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  • Preparation method of layered cement and mswi bottom ash alkali-activated double gelling system material

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preparation example Construction

[0029] The preparation method includes: MSWI bottom ash crushing process, grinding process, weighing and batching and mixing process, and the preparation and pouring process of double-gel system materials. The specific methods are as follows:

[0030] (1) Crushing process: MSWI bottom ash is the product of municipal solid waste incineration, and the MSWI bottom ash micropowder used in the double gelling system material has been dried and crushed. That is, the MSWI bottom ash raw material is continuously dried at 60°C for 2 hours, and then crushed into particles with a diameter of 0

[0031] (2) Grinding process: The crushed MSWI bottom ash particles can be used as a cementitious material after being ground by a ball mill for 0.5 hours (the specific surface area reaches 400 m 2 / kg, MSWI bottom ash particles with a particle size of less than 30 μm account for more than 90% of the total mass);

[0032] Blast furnace granulated slag powder is S95 grade, with ...

Embodiment 1

[0037] Embodiment 1: the preparation method of layered cement and MSWI bottom ash alkali-activated double gelling system material, raw material composition and mass percentage thereof are as follows: cement cementitious material accounts for 20% of gel total amount (dosage 117.2kg / m 3 ), the MSWI bottom ash alkali-activated material accounts for 80% of the total gel (amount of 468.7kg / m 3 ). Wherein the alkali-activated gelling material is ground MSWI bottom ash 58% (dosage 273.4kg / m 3 ); ground blast furnace granulated slag 32% (dosage 183.6kg / m 3 ); ground slaked lime powder 2% (dosage 11.7kg / m 3 ); the fine aggregate is medium-coarse sand (amount of 1757.7kg / m 3 ); liquid water glass with a modulus of 2.75 (dosage 125kg / m 3 ); caustic soda (NaOH dosage 26kg / m 3 ); water (amount 188.8kg / m 3 );

Embodiment 2

[0038] Embodiment 2: the preparation method of layered cement and MSWI bottom ash alkali-activated double gelling system material, raw material composition and mass percentage thereof are as follows: cement cementitious material accounts for 40% of gel total amount (dosage 234.4kg / m 3 ), the MSWI bottom ash alkali excitation material accounts for 60% of the total amount of the gel (amount of 351.5kg / m 3 ). Wherein the alkali-activated gelling material is ground MSWI bottom ash 35% (dosage 203.1kg / m 3 ); ground blast furnace granulated slag 23% (dosage 136.7kg / m 3 ); ground slaked lime powder 2% (dosage 11.7kg / m 3 ); the fine aggregate is medium and coarse sand (1757.7kg / m 3 ); liquid water glass with a modulus of 2.75 (amount of 93.7kg / m 3 ); caustic soda (NaOH dosage 19.5kg / m 3 ); water (dosage 214.8kg / m 3 );

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Abstract

The present invention relates to the technical field of preparation methods of double-gelling system materials, especially the preparation method of layered cement and MSWI bottom ash alkali-activated double-gelling system materials. , supplemented with an appropriate amount of finely ground blast furnace granulated slag, finely ground slaked lime powder and combined with cement to prepare a double-gel system material, with liquid water glass with a modulus of 1‑3 as the activator (liquid high modulus water glass and NaOH), mixed with sand with a particle size of 0.15-5mm as fine aggregate, and prepared layered cement and MSWI bottom ash alkali-activated double-gelling system material through a certain process, because the double-gelling system material adopts Layered pouring can eliminate the incompatibility between cement and MSWI bottom ash alkali-activated materials. The invention can not only eliminate the problem of environmental pollution caused by the mass accumulation of MSWI bottom ash, but also alleviate the excessive dependence on cement, reduce the excessive consumption of non-renewable resources, and give full play to the advantages of double-cementation system materials.

Description

technical field [0001] The invention relates to the field of double-gelling system materials, in particular to a preparation method for layered cement and MSWI bottom ash alkali-activated double-gelling system materials. Background technique [0002] Cement concrete has the advantages of high strength, good frost resistance, strong plasticity, and excellent durability. However, the production and use of cement has brought serious problems of high energy consumption and high pollution. Therefore, people began to urgently develop a high-performance, low-energy-consumption, and pollution-free building material to replace the demand for cement materials. MSWI bottom ash is a product of municipal solid waste incineration and is a recyclable resource. Using MSWI bottom ash as a raw material to prepare alkali-activated materials can not only realize the resource utilization of bottom ash, turn waste into treasure, but also partially replace cement, which can not only eliminate th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/345C04B7/28C04B7/153C04B7/38
CPCC04B7/1535C04B7/243C04B7/345C04B7/38Y02P40/10
Inventor 黄国栋
Owner ANHUI UNIV OF SCI & TECH
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