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Preparation method of radiation-proof cement clinker mineral phase system

A cement clinker and mineral phase technology, which is applied in the field of radiation-proof cement material preparation, can solve problems such as large-volume concrete cracks and reduce cement strength, and achieve the effects of suppressing cracks, increasing cement strength, and reducing eutectic point

Active Publication Date: 2013-06-19
湖北湖大天沭新能源材料工业研究设计院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Whether natural boronite can adapt to long-term neutron radiation without swelling, there is currently no relevant research report; adding boron admixtures to Portland cement will delay the setting and hardening of cement, and reduce the strength of cement. Can guarantee normal setting and hardening, but can cause cracks in mass concrete

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A preparation method of radiation-proof cement clinker mineral phase system, the steps are:

[0026] 1. Add CaCO 3 、Al 2 o 3 and B 2 o 3 by CaCO 3 :Al 2 o 3 :B 2 o 3 The molar ratio is 3:0.8:0.2, mixed evenly, and ground to a 180-mesh square hole sieve residue ≤ 10%;

[0027] 2. Press the ground powder into a cylindrical test piece, place it in a corundum crucible and calcinate it at 1350°C for 1 hour in a reburning test furnace to obtain mineral phase system C 3 A+Ca 3 B 2 o 6 +Ca 5 al 6 o 14 .

Embodiment 2

[0029] A preparation method of radiation-proof cement clinker mineral phase system, the steps are:

[0030] 1. Add CaCO 3 、Al 2 o 3 and B 2 o 3 by CaCO 3 :Al 2 o 3 :B 2 o 3 The molar ratio is 3:0.6:0.4, mixed evenly, and ground to a 180-mesh square hole sieve residue ≤ 10%;

[0031] 2. Press the ground powder into a cylindrical test piece, place it in a corundum crucible and calcinate it at 1300°C for 1.5 hours in a reburning test furnace to obtain mineral phase system C 3 A+Ca 3 B 2 o 6 +Ca 5 al6 o 14 .

Embodiment 3

[0033] A preparation method of radiation-proof cement clinker mineral phase system, the steps are:

[0034] 1. Add CaCO 3 、Al 2 o 3 and B 2 o 3 by CaCO 3 :Al 2 o 3 :B 2 o 3 The molar ratio is 3:0.4:0.6, mixed evenly, and ground to a 180-mesh square hole sieve residue ≤ 10%;

[0035] 2. Press the ground powder into a cylindrical test piece, place it in a corundum crucible and calcinate it at 1250°C for 2 hours in a reburning test furnace to obtain mineral phase system C 3 A+Ca 3 B 2 o 6 +Ca 5 Al 6 o 14 .

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Abstract

The invention discloses a preparation method of a radiation-proof cement clinker mineral phase system, which comprises the following steps of: (1) raw material preparation: raw materials are uniformly mixed according to a ratio, and are ground until the amount of residues on a 180-mesh square hole sieve is less than or equal to 10%; and (2) high temperature sintering: the ground powder in the step 1 is pressed into cylindrical test pieces, and the cylindrical test pieces are placed in a corundum crucible and are calcinated for 1 to 3 hours at a high temperature in a reheating test furnace to obtain the desired mineral phase system. The raw materials are calcium carbonate, alumina, and boron oxide, or calcium carbonate, alumina, boron oxide, and iron oxide. Through the mineral phase systemprepared by the preparation method disclosed by the invention, neutrons can be absorbed, the heat consumption of a cement clinker preparation process is reduced, the normal setting and hardening of cement are promoted, the strength of cement is improved, the mass concrete cracks can be inhibited, and the durability of concrete is improved. The method provided by the invention is simple in process, is easy to control and adapts to large-scale industrial production.

Description

technical field [0001] The invention belongs to the field of preparation of radiation-proof cement materials, and in particular relates to a preparation method of a radiation-proof cement clinker mineral phase system. Background technique [0002] At present, the radiation-proof cements developed and used at home and abroad mainly include barium cement, strontium cement, and boron cement. [0003] In terms of mineral composition, barium cement and strontium cement replace calcium oxide (CaO) in Portland cement with barium oxide (BaO) and strontium oxide (SrO), forming tribarium silicate (3BaO·SiO 2 ) and tristrontium silicate (3SrO SiO 2 ) is the hydraulic gelling material of the main mineral. Its production process is basically the same as Portland cement, and the calcination temperature is higher, reaching above 1550 °C. However, barium cement and strontium cement can only shield gamma and X-rays, but cannot prevent neutrons. [0004] Neutron rays are composed of uncha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/345
Inventor 田键
Owner 湖北湖大天沭新能源材料工业研究设计院有限公司
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