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Low hydration heat copper slag based composite cementitious material and preparation method thereof

A technology of composite cementitious materials and low heat of hydration, applied in cement production, etc., can solve problems such as increased cement production costs, and achieve the effect of being suitable for large-scale mass production, improving utilization rate, and increasing output

Inactive Publication Date: 2018-09-04
JIANGXI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the continuous development of the construction industry, the demand for cement is also increasing. Due to the continuous reduction of raw materials, the production cost of cement is gradually increasing.

Method used

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  • Low hydration heat copper slag based composite cementitious material and preparation method thereof
  • Low hydration heat copper slag based composite cementitious material and preparation method thereof
  • Low hydration heat copper slag based composite cementitious material and preparation method thereof

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preparation example Construction

[0035] The preparation method of the above-mentioned low heat of hydration copper slag-based composite cementitious material comprises:

[0036] Step 1: Put the copper slag in an oven for 3 to 4 hours, set the temperature of the oven to 110°C, and obtain the dried copper slag;

[0037] Step 2: Put the copper slag in a ball mill and grind it for 30-120 minutes to obtain a specific surface area of ​​500-750m 2 / kg copper slag powder;

[0038] Step 3: Add 20-30 parts of copper slag powder into 70-80 parts of Portland cement and stir evenly in parts by weight to obtain the copper slag-based composite cementitious material with low heat of hydration.

[0039] The working principle of the present invention is: copper slag and cement clinker have similar chemical composition, and the active SiO contained 2 In the later stage of hydration and the hydration product Ca(OH) 2 The following weak pozzolanic reaction occurs: (C-S-H gelling), which has potential gelling properties and can...

Embodiment 1

[0058] A copper slag-based composite cementitious material with low heat of hydration and a preparation method thereof, comprising the following components in parts by weight: 20 parts of copper slag powder, 80 parts of cement and 40 parts of water.

[0059] The copper slag powder is prepared from high-temperature water-quenched waste slag discharged from a copper smelter by ball milling for 30 minutes, wherein the copper slag powder includes Fe 2 o 3 , SiO 2 、Al 2 o 3 , CaO, etc., A1 in the copper slag powder 2 o 3 and SiO 2 The sum of the mass contents is greater than 80%, and the apparent density of the copper slag powder is 3.4g / m 3 Specifically, put the copper slag in the oven for 3 hours, set the temperature of the oven at 110°C to obtain the dried copper slag, and then put the copper slag in a ball mill for grinding for 30 minutes to obtain a specific surface area of ​​503m 2 / kg of copper slag powder, the cement is Portland cement with a label of 42.5 or more. ...

Embodiment 2

[0067] A copper slag-based composite cementitious material with low heat of hydration and a preparation method thereof, comprising the following components in parts by weight: 20 parts of copper slag powder, 80 parts of cement and 40 parts of water.

[0068] The copper slag powder is prepared from high-temperature water-quenched waste slag discharged from a copper smelter by ball milling for 60 minutes, wherein the copper slag powder includes Fe 2 o 3 , SiO 2 、Al 2 o 3 , CaO, etc., A1 in the copper slag powder 2 o 3 and SiO 2 The sum of the mass contents is greater than 80%, and the apparent density of the copper slag powder is 3.5g / m 3 Specifically, put the copper slag in the oven for 3.5 hours, set the oven temperature to 110°C to obtain the dried copper slag, and then put the copper slag in a ball mill for grinding for 60 minutes to obtain a specific surface area of ​​627m 2 / kg of copper slag powder, the cement is Portland cement with a label of 42.5 or more.

[00...

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Abstract

The invention provides a low hydration heat copper slag based composite cementitious material and a preparation method thereof. The low hydration heat copper slag based composite cementitious materialcomprises the following components by weight: 20-30 parts of copper slag powder; and 70-80 parts of Portland cement; with a total of 100 parts. The preparation method of the low hydration heat copperslag based composite cementitious material includes: step 1: putting copper slag in an oven for 3-4h, and setting the oven temperature at 110DEG C to obtain dried copper slag; step 2: putting the copper slag in a ball mill for powder milling for 30-120min to obtain copper slag powder with a specific surface area of 500-750m<2> / kg; step 3: by weight, adding 20-30 parts of the copper slag powder into 70-80 parts of Portland cement, and stirring the substances evenly to obtain the low hydration heat copper slag based composite cementitious material. While ensuring the quality of the cementitiousmaterial, the method improves the copper slag utilization rate, improves the environmental pollution, and reduces the energy consumption and cost of cement calcination.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a copper slag-based composite cementitious material with low heat of hydration and a preparation method thereof. Background technique [0002] Copper slag is industrial solid waste produced in the process of copper smelting, mainly in the form of water-quenched copper slag. Its main mineral composition is fayalite (Fe 2 SiO 4 ), magnetite (Fe 3 o 4 ), etc., the main chemical components are iron oxide, silicon dioxide, aluminum oxide, calcium oxide, potassium oxide and sodium oxide. [0003] About 2.2 tons of copper slag are produced for every ton of copper produced. In the prior art, the utilization rate of copper slag is low, and a large amount of copper slag is not reused and piled up in the area where the copper smelting factory is located, occupying a large amount of land and causing environmental pollution. , affecting production development. [0004] Cement...

Claims

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Application Information

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IPC IPC(8): C04B7/147C04B7/36
CPCC04B7/147C04B7/36Y02P40/10
Inventor 宋军伟
Owner JIANGXI UNIV OF TECH
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