A kind of modified limestone powder and its preparation method and concrete

A limestone powder and concrete technology, applied in the field of building materials, can solve problems such as sulfate corrosion of concrete, and achieve the effects of reducing porosity, green environmental protection cost, and improving sulfate corrosion resistance.

Active Publication Date: 2021-07-30
CHINA TIESIJU CIVIL ENG GRP CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Based on this, the present invention provides a modified limestone powder, which solves the sulfate corrosion problem of limestone powder concrete in the prior art by performing physical and chemical double modification on the limestone powder

Method used

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  • A kind of modified limestone powder and its preparation method and concrete
  • A kind of modified limestone powder and its preparation method and concrete
  • A kind of modified limestone powder and its preparation method and concrete

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Embodiment Construction

[0024] In order to facilitate understanding, the present invention will be described more fully in conjunction with specific embodiments. However, the present invention can be implemented in many different forms, is not limited to the embodiments described herein. Conversely, the purpose of providing these embodiments is to make a more thorough understanding of the disclosure of the present invention.

[0025] All techniques and scientific terms used herein are identical to those skilled in the art, unless otherwise defined. The terminology used in the specification of the present invention is merely intended to describe the embodiments of the specific embodiments, and is not intended to limit the invention.

[0026] The preparation method of modified limestone powder in the following examples and comparative examples is: refer to the mass powder, physical modifier, and chemical modifier according to the mass percentage of the mass; then the limestone powder and the physics change...

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Abstract

The invention discloses a modified limestone powder, a preparation method thereof and concrete, which is made of 94-97% of limestone powder, 1% of a physical modifier and 2-5% of a chemical modifier according to the mass percentage, wherein the The above-mentioned chemical modifier is a mixture of oxalic acid, phosphorus tailings and polyferrosilicon flocculant. The physical and chemical double modification of the limestone powder solves the problem of sulfate erosion of limestone powder concrete in the prior art, and the obtained modified limestone powder has high density, low porosity, and excellent resistance to sulfate erosion.

Description

Technical field [0001] The present invention belongs to the field of building materials, and in particular to a modified limestone powder and a preparation method thereof, further involves a concrete containing the above modified limestone powder. Background technique [0002] As a commonly used building material, it is usually referred to as cement as a main gelation material, with water, sand, stone, and necessary to incorporate chemical external plus and mineral blending, in accordance with appropriate proportion, and mixed, concurrently molded and Artificial stone made of hardened. [0003] During the actual use, the concrete will be in different environmental conditions, and its effect on concrete is also different. When the concrete structure is in a sulfate-containing soil or groundwater, the material of limestone-containing carbonate ion is used when formulated concrete, and the main gelation in cement stone is less than 5 ° C and sufficient water. CSH The gel transition ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B20/10C04B24/04C04B14/28
CPCC04B20/1033C04B40/0039C04B14/28C04B24/04C04B22/0006C04B22/00
Inventor 彭建伟唐洁黄海訾贺姚佳楠瞿鑫明刘发权师永志章国辉陈娟汪志勇
Owner CHINA TIESIJU CIVIL ENG GRP CO LTD
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