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One-component alkali-activated nickel slag cement and its preparation and use method

An alkali-activated, single-component technology, applied in the field of single-component alkali-activated nickel slag cement, can solve the problems of high energy consumption, high material consumption, high environmental pollution, etc., and achieve the effects of long setting time, low price and easy use

Active Publication Date: 2018-02-09
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

"A method for preparing single-component alkali-activated cement with normal temperature curing by low-temperature calcination" (Patent No.: CN201210410858.6) and "A method for preparing composite single-component alkali-activated cement with normal temperature curing" (Patent No.: CN201410766746.3) Two preparation methods of single-component alkali-activated cement are introduced. In the preparation process, the raw material of calcined silica-alumina oxide and the mixture of alkaline activator are required, which leads to high energy consumption and high environmental pollution. Therefore, Alkali-activated cement that can be used directly without calcination has broad application prospects and markets

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  • One-component alkali-activated nickel slag cement and its preparation and use method

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Embodiment 1

[0015] Adopted the nickel slag that Fujian Yuanxin Group provides in the example of the present invention, NaOH and NaOH 2 SO 4 Both are analytically pure NaOH and NaOH provided by Shanghai Reagent General Factory 2 SO 4 . See 1 for the chemical composition of nickel slag. The weight of each component is: in terms of weight percentage: nickel slag is 90%, ordinary Portland cement is 10%, the sum of the two weight percentages is 100%, and NaOH is the weight of nickel slag and ordinary Portland cement. 4% of sum, Na 2 SO 4 It is 1% of the sum of the weight of nickel slag and ordinary Portland cement, and the naphthalene-based water reducer is 1% of the sum of the weight of nickel slag and ordinary Portland cement.

[0016] Nickel slag, ordinary Portland cement, NaOH, Na 2 SO 4 and naphthalene-based high-efficiency superplasticizers were ground to 350m 2 / kg, put into the mixing pot and stir for 5min, then add water, the weight of water is 32% of the sum of the weight of...

Embodiment 2

[0020] Adopted the nickel slag that Fujian Yuanxin Group provides in the example of the present invention, NaOH and NaOH 2 SO 4 Both are analytically pure NaOH and NaOH provided by Shanghai Reagent General Factory 2 SO 4 . See 1 for the chemical composition of nickel slag. The weight of each component is: in terms of weight percentage: nickel slag is 85%, ordinary Portland cement is 15%, the sum of the two weight percentages is 100%, and NaOH is the weight of nickel slag and ordinary Portland cement. 2% of sum, Na 2 SO 4 It is 1.5% of the sum of nickel slag and ordinary Portland cement, and the naphthalene-based water reducer is 0.5% of the sum of nickel slag and ordinary Portland cement.

[0021] Nickel slag, ordinary Portland cement, NaOH, Na 2 SO 4 and naphthalene-based high-efficiency superplasticizers were ground to 400 m 2 / kg, put into the mixing pot and stir for 5 minutes, then add water, the weight of water is 27% of the sum of the weight of nickel slag and o...

Embodiment 3

[0023] Adopted the nickel slag that Fujian Yuanxin Group provides in the example of the present invention, NaOH and NaOH 2 SO 4 Both are analytically pure NaOH and NaOH provided by Shanghai Reagent General Factory 2 SO 4 . See 1 for the chemical composition of nickel slag. The weight of each component is: in terms of weight percentage: nickel slag is 95%, ordinary Portland cement is 5%, the sum of the two weight percentages is 100%, and NaOH is the weight of nickel slag and ordinary Portland cement. 6% of sum, Na 2 SO 4 It is 0.5% of the sum of nickel slag and ordinary Portland cement, and the naphthalene-based water reducer is 1.5% of the sum of nickel slag and ordinary Portland cement.

[0024] Nickel slag, ordinary Portland cement, NaOH, Na 2 SO 4 and naphthalene-based high-efficiency superplasticizers were ground to 375 m 2 / kg, put into the mixing pot and stir for 5 minutes, then add water, the weight of water is 27% of the sum of the weight of nickel slag and or...

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Abstract

The invention discloses one-component alkali-activated nickel slag cement and a preparation and application method thereof. The one-component alkali-activated nickel slag cement is composed of nickel slag, ordinary Portland cement, NaOH, Na2SO4 and a naphthalene-based superplasticizer. The mechanical properties and workability of the nickel slag cement meet the requirements for ordinary Portland cement, and the nickel slag cement can be used simply by adding water, so that construction is convenient. Compared with ordinary Portland cement, the one-component alkali-activated nickel slag cement also has the advantages that a calcining process is not needed (energy consumption is low), and the industrial waste nickel slag is adopted as a main raw material (cost is low); the one-component alkali-activated nickel slag cement has good social, economic and environment protection benefits and is suitable for large-scale application and popularization.

Description

technical field [0001] The invention belongs to the field of new cement materials, and in particular relates to a single-component alkali-activated nickel slag cement and a preparation and use method thereof. Background technique [0002] my country's cement output in 2014 was as high as 2.476 billion tons, most of which were Portland cement. The calcination temperature of Portland cement is as high as 1450°C, which leads to high energy and material consumption, high carbon emissions, serious environmental pollution, poor acid and corrosion resistance and durability, and consumes a large amount of high-quality limestone resources. As a new type of cement, alkali-activated cement was first discovered by German scholars. It used finely ground slag powder and potassium hydroxide solution to mix, and studied its gelling properties. Subsequently, the former Soviet Union and many other countries in the world conducted extensive research on alkali-activated cement and its concrete...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/08
CPCC04B28/085C04B2201/50C04B7/02C04B22/062C04B22/147C04B24/226
Inventor 季韬杨宇王鹏辉梁咏宁
Owner FUZHOU UNIV