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Preparation method of high-performance roasted diacrete

A technology of calcining diatomite and diatomite, which is applied in the field of building material manufacturing, can solve the problems of not fully exerting pozzolanic activity, unfavorable environmental protection, unfavorable strength, etc., and achieves low preparation cost, environmental protection, and increased soluble silicon content Effect

Inactive Publication Date: 2018-09-07
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem that diatomite in diatomite concrete in the prior art has not been calcined at high temperature and cannot fully exert its pozzolanic activity, which is not conducive to the improvement of strength, and at the same time, the existing high-performance concrete admixture is not conducive to environmental protection. Furthermore, a preparation method of high-performance calcined diatomite concrete is proposed

Method used

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Examples

Experimental program
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Effect test

specific Embodiment approach 1

[0021] Specific embodiment one: the preparation method described in this embodiment is realized according to the following steps:

[0022] Step 1: High-temperature calcination at 850°C: place natural diatomite in a muffle furnace and calcine for 2 hours to prepare siliceous diatomite with a higher activity index;

[0023] Step 2: Grinding: Put the calcined siliceous diatomite into an ultrafine pulverizer for grinding;

[0024] Step 3: Proportioning: Proportioning by weight fraction, 100 parts of cement, 25 parts of calcined diatomite, 49 parts of coarse quartz sand, 40-70 meshes of coarse quartz sand, 61 parts of fine quartz sand, 61 parts of fine quartz sand The particle size is 70-140 mesh, 25 parts of water, and 2 parts of high-efficiency polycarboxylate superplasticizer;

[0025] Step 4: Mixing and stirring: Pour the coarse quartz sand and fine quartz sand into the mixing pot and stir for 5 minutes, pour 100 parts of cement and 25 parts of calcined diatomaceous earth into...

specific Embodiment approach 2

[0026] Specific embodiment two: the preparation method described in this embodiment is realized according to the following steps:

[0027] The particle size of the siliceous diatomite after grinding in step 2 is 20 microns-50 microns, the calcined diatomite used in the proportioning in step 3 has a particle size of 20 microns-50 microns, and the particle size of the calcined diatomite used in step 3 is the Pour 25 parts of calcined diatomite with a particle size of 20 microns to 50 microns into the stirring pot, and the other components are the same as those in Embodiment 1.

[0028] Calcined diatomite composition after mixing and stirring of the present invention is (content):

[0029] Element

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Abstract

The invention provides a preparation method of a high-performance roasted diacrete, relates to a preparation method of the diacrete, belongs to the field of building material manufacturing, and aims at solving the problems that diatomite in the diacrete in the prior art is not roasted under high temperature, and the cinerite activity cannot be fully played, so that the intensity cannot be improved, and meanwhile, the conventional high-performance concrete additive is not environmentally friendly. According to the technical scheme, the method comprises the following steps: 1, roasting under high temperature of 850 DEG C; 2, powdering; 3, mixing; 4, mixing and stirring, wherein diatomite in the high-performance concrete taking roasted diatomite as the main raw material contains 92.470% of SiO2, 2.015% of Al2O3, 2.362% of Na2O, 1.274% of Fe2O3, 0.824% of Cl, 0.138% of MgO, and 0.917% of other impurities.

Description

technical field [0001] The invention relates to a preparation method of diatomite concrete, in particular to a preparation method of high-performance calcined diatomite concrete, which belongs to the field of building material manufacturing. Background technique [0002] High-performance concrete is characterized by high strength, toughness, and durability. It has become a new system to achieve a great leap in the performance of cement-based materials. It has high cement utilization efficiency and is an energy-saving, material-saving, and low-carbon engineering material. It can be built to serve in harsh environments, have a long life, and have low maintenance and repair costs. High performance concrete has been used in large spans, bridges, super high-rises, marine engineering, protective engineering and other fields. Using calcined diatomite as a mineral admixture can improve the strength and durability of concrete and reduce the weight of the structure. In addition, diato...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02C04B111/20
CPCC04B28/02C04B2111/00017C04B2111/20C04B18/023C04B14/06C04B2103/302C04B20/0076
Inventor 严佳川林幽竹曹正罡范峰邹超英
Owner HARBIN INST OF TECH
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