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A heat-resistant concrete made of full-heavy slag aggregates using ordinary Portland cement

A technology of ordinary Portland cement and heat-resistant concrete, which is applied in the field of refractory materials, can solve the problems of wasting primary resources of refractory materials and high cost, and achieve the reduction of unstable substances such as hydroxides, easy material selection, and excellent preparation process simple effect

Active Publication Date: 2017-07-21
包头冶金建筑研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Generally, the composition materials of heat-resistant concrete include refractory aggregate (coarse aggregate and fine aggregate), refractory powder, admixture, binder, etc. Among them, the main refractory raw material aggregate is generally a refractory raw material with stable performance. The heat resistance can reach more than 1200°C. It is used to produce heat-resistant concrete below 700°C. It not only wastes the original resources of refractory materials, but also leads to overkill. According to the traditional process, refractory materials are used to make the coarse and fine aggregates of heat-resistant concrete, and then high-temperature-resistant cement-high-alumina cement and water are used to mix in a quantitative manner. Both are higher than the heavy furnace slag

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Aggregate selection:

[0027] The coarse and fine aggregate of blast furnace heavy slag with a reasonable gradation of calcium oxide content of 38% and a stable structure and strength-crushing value of 13.8% was selected. Among them, 39kg with a particle size of 5-20mm and 26kg with a particle size of 0-5mm.

[0028] Powder selection:

[0029] The admixtures that meet the standard requirements: slag micropowder, fly ash and silica micropowder are mixed according to the weight ratio of 2.4:1.5:0.4, and pre-mixed until uniform.

[0030] Preparation of the mix:

[0031] Add 39kg of the prepared particle size of 5-20mm and 26kg of the particle size of 0-5mm into the mixer for pre-mixing until uniform, then add 18kg of cement and 17kg of admixture and mix evenly, then add sodium tripolyphosphate and partial 14g each of sodium phosphate and 16kg of water, stir for 2-3 minutes until the mixture is uniform, and no bleeding occurs.

[0032] The physical index of the product ...

Embodiment 2

[0034] Aggregate selection:

[0035] Choose coarse and fine aggregates of blast furnace heavy slag with a calcium oxide content of 42%, stable structure and strength-crushing value not greater than 12%, of which 39kg with a particle size of 5-20mm and 26kg with a particle size of 0-5mm .

[0036] Powder selection:

[0037] The fly ash, slag micropowder and silica micropowder that meet the standard requirements are mixed according to the weight ratio of 2.6:1.3:0.6, and pre-mixed until uniform.

[0038] Preparation of the mix:

[0039]Add 39kg of the prepared particle size of 5-20mm and 26kg of the particle size of 0-5mm into the mixer for pre-mixing until uniform, then add 15kg of cement and 20kg of admixture and mix evenly, then add sodium tripolyphosphate and partial 14g each of sodium phosphate and 16kg of water, stir for 2-3 minutes until the mixture is uniform, and no bleeding occurs.

[0040] The physical index of the product obtained in the present invention is a bu...

Embodiment 3

[0042] Aggregate selection:

[0043] Choose coarse and fine aggregates of blast furnace heavy slag with a calcium oxide content of 36%, stable structure and strength-crushing value not greater than 11.4%, of which 40.6kg with a particle size of 5-20mm and a particle size of 0-5mm 29.4kg.

[0044] Powder selection:

[0045] The fly ash, slag micropowder and silica micropowder that meet the standard requirements are mixed according to the weight ratio of 2.2:1.0:0.3, and pre-mixed until uniform.

[0046] Preparation of the mix:

[0047] Add 40.6kg of the prepared particle size of 5-20mm and 29.4kg of particle size of 0-5mm into the mixer for pre-mixing until uniform, then add 12kg of cement and 18kg of admixture and mix evenly, and then add sodium tripolyphosphate And each 14g of sodium metaphosphate and 16kg of water, stir for 2-3 minutes until the mixture is uniform, and no bleeding occurs.

[0048] The physical index of the product obtained in the present invention is a b...

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Abstract

The present invention relates to a fire-resistant material, particularly to a full-weight slag aggregate heat-resistant concrete prepared by using ordinary silicate cement. The full-weight slag aggregate heat-resistant concrete comprises, by weight, 40-80% of a blast furnace heavy slag aggregate, 10-20% of ordinary silicate cement, 10-20% of slag micro-powder, 0-10% of fly ash, and 0-10% of silica micro-powder, wherein 0.01-0.03% of sodium tripolyphosphate and 0.01-0.03% of sodium metaphosphate are added to the raw materials. According to the present invention, the metallurgical solid waste blast furnace heavy slag is adopted to replace the fire-resistant material to prepare the fire-resistant aggregate, the cementitious material adopts the metallurgical solid waste materials such as the slag powder and the fly ash, and the binding agent uses the ordinary silicate cement with no high temperature resistance, such that the existing metallurgical slag resources are completely utilized to form the silicate and aluminate high temperature resistance hydrate during the cement hydration process so as to reduce the generation of the hydroxide unstable substance, enrich the source of the heat-resistant concrete raw materials, and reduce the cost of the heat-resistant concrete.

Description

technical field [0001] The invention relates to a refractory material, in particular to a heat-resistant concrete prepared by using ordinary Portland cement to prepare full-weight slag aggregates. Background technique [0002] Generally, the composition materials of heat-resistant concrete include refractory aggregate (coarse aggregate and fine aggregate), refractory powder, admixture, binder, etc. Among them, the main refractory raw material aggregate is generally a refractory raw material with stable performance. The heat resistance can reach more than 1200°C. It is used to produce heat-resistant concrete below 700°C. It not only wastes the original resources of refractory materials, but also leads to overkill. According to the traditional process, refractory materials are used to make the coarse and fine aggregates of heat-resistant concrete, and then high-temperature-resistant cement-high-alumina cement and water are used to mix in a quantitative manner. Both are higher...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B18/14
CPCY02W30/91
Inventor 王爱红谭仝奎董旭荣张浩郝思佳王旭雁
Owner 包头冶金建筑研究院
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