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Process for preparing microcrystal glass ceramic by concrete sludge

A glass-ceramic and concrete technology, which is applied in the field of preparing glass ceramics by using concrete sludge, and comprehensive utilization of concrete sludge, can solve the problems of occupying land and unavoidable soil pollution, etc. The effect of production costs

Inactive Publication Date: 2008-01-09
MATERIAL SCI RES INST SHANDONG INST OFCIVIL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since concrete itself is a high-alkali substance with strong alkalinity, it will inevitably pollute the soil through a simple landfill method, and will undoubtedly occupy a large amount of land

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Additive composition comprises by weight of chemically pure reagent: 50.8 SiO 2 , 13.0 Al 2 o 3 , 16.6MgO, 10.6CaF 2 . Mix 80% concrete sludge with 20% additives evenly. Keep the temperature at 1500°C for 2 hours in a high-temperature furnace for melting treatment. The glass melt is rapidly cooled by distilled water, then put into an annealing furnace, and kept at 600°C for 10 hours with a cooling rate of 90°C / h to obtain the basic glass. After molding the glass sample, place it in a heat treatment furnace, hold it at 820°C for 2 hours, then hold it at 1040°C for 1 hour, carry out the heat treatment process of sintering and crystallization, and then cool it to obtain glass-ceramic ceramics. The precipitated crystal phase is calcium magnesium silicate CaMgSi 2 o 6 and wollastonite CaSiO 3 , the prepared glass-ceramics can be applied to wear-resistant materials.

Embodiment 2

[0015] Additive composition comprises by weight part of chemically pure reagent: 48 SiO 2 , 18.5 Al 2 o 3 , 10.0 MgO, 5.3 CaF 2 , 22.0 ZnO, 1.2 Na 2 O. Mix 75% concrete sludge with 25% additives evenly. Keep the temperature at 1440°C for 2 hours in a high-temperature furnace for melting treatment. The glass melt is rapidly cooled by distilled water, and then put into an annealing furnace, and kept at 650°C for 8 hours with a cooling rate of 100°C / h to obtain the basic glass. After molding the glass sample, place it in a heat treatment furnace, keep it at 790°C for 6 hours, then keep it at 1050°C for 2 hours, carry out the heat treatment process of sintering and crystallization, and then cool it to obtain glass-ceramics, and the precipitated crystal phase is CaZnSi 2 o 7 , Ca(Fe,Zn)Si 2 o 6 and wollastonite CaSiO 3 , the prepared glass-ceramics can be applied to decorative materials.

Embodiment 3

[0017] Additive composition comprises by weight of chemically pure reagent: 38.8 SiO 2 , 30.2 Al 2 o 3 , 14.3MgO, 20.0 CaF 2 , 5.8 Na 2 O. Mix 65% concrete sludge with 35% additives evenly. Keep the temperature at 1430°C for 2 hours in a high-temperature furnace for melting treatment. The glass melt is rapidly cooled by distilled water, then put into an annealing furnace, and kept at 680°C for 7 hours with a cooling rate of 110°C / h to obtain the basic glass. After molding the glass sample, place it in a heat treatment furnace, hold it at 800°C for 9 hours, then hold it at 1000°C for 3 hours, carry out the heat treatment process of sintering and crystallization, and then cool it to obtain glass-ceramics. The prepared glass-ceramics can be used in Chemical resistant material.

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PUM

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Abstract

A process for preparing glass ceramics from concrete sludge includes such steps as mixing concrete sludge (65-85%) with additive (15-35%), preparing basic glass by high-temp smelting method, and heat treating. It has high resistance to abrading and chemical corrosion and no secondary pollution.

Description

technical field [0001] The invention relates to the field of comprehensive utilization of concrete sludge, in particular to the field of using concrete sludge to prepare glass ceramics. Background technique [0002] With the rapid development of my country's economy and the acceleration of urbanization, the construction of infrastructure related to concrete structures and the construction of urban housing have also accelerated, resulting in a large amount of waste concrete building sludge. Under normal circumstances, for concrete sludge, people generally landfill it. Data show that concrete sludge has become one of the important sources of municipal solid waste. According to statistics: In 1988, my country's solid waste reached 1 billion tons, and the stock of solid waste in more than 30 cities across the country exceeded 10 million tons. Since concrete itself is a high-alkaline substance with strong alkalinity, it will inevitably pollute the soil through a simple burial t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/00C03C6/00C03B32/02
Inventor 田清波王玥崔明铎徐丽娜李静岳雪涛
Owner MATERIAL SCI RES INST SHANDONG INST OFCIVIL ENG