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A kind of granite stone powder concrete whose strength grade is not greater than C40 and its preparation method

A technology of granite rock powder and strength grade, applied in the field of concrete, can solve the problem of lack of research on the reaction mechanism of granite rock powder, and achieve the effect of saving cement and improving the interface structure.

Active Publication Date: 2015-10-28
QINGDAO QINGJIAN NEW MATERIAL GRP CO LTD
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  • Abstract
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Problems solved by technology

[0005] 2. Second, there is a lack of research on the theory and reaction mechanism of granite stone powder

Method used

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  • A kind of granite stone powder concrete whose strength grade is not greater than C40 and its preparation method
  • A kind of granite stone powder concrete whose strength grade is not greater than C40 and its preparation method
  • A kind of granite stone powder concrete whose strength grade is not greater than C40 and its preparation method

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Embodiment Construction

[0032] The above-mentioned content of the present invention will be described in further detail below through the embodiment form, but this should not be interpreted as the scope of the above-mentioned theme of the present invention is limited to the following embodiments, all technologies realized based on the above-mentioned content of the present invention belong to this invention the scope of the invention.

[0033] 1. The materials used in the test are as follows:

[0034] Cement: P·O42.5 Ordinary Portland Cement

[0035] Mineral powder: S95 mineral powder

[0036] Fly ash: Class II fly ash

[0037] Stone powder: Granite stone powder (45μm sieve remaining 38.2%)

[0038] Coarse aggregate: 5-25mm continuous graded granite crushed stone, meeting the requirements of JGJ52-2006

[0039] Fine aggregate: machine-made sand, medium sand with a fineness modulus of 3.1 that meets the requirements of JGJ52-2006, and a mud content of 3%

[0040] Admixture: Self-compounded polyca...

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Abstract

The invention discloses granite stone powder concrete having strength grade not more than C40 and a preparation method of the granite stone powder concrete. The granite stone powder concrete is mainly prepared from a cementing material, water, sand, gravels and an admixture, wherein the cementing material is a mixture of cement and granite stone powder or a mixture of cement, mineral powder and granite stone powder, and the admixture is a water reducing agent. The granite stone powder concrete has early crack resistance, chloride penetration resistance and carbonation resistance, which are superior to those of the traditional concrete under a condition of meeting the strength requirement.

Description

technical field [0001] The invention belongs to the technical field of concrete, and relates to a granite stone powder concrete whose strength grade is not higher than C40 grade by using cement, mineral powder, granite stone powder and self-compounded polycarboxylic acid admixture. Background technique [0002] Since the 1930s, concrete has mainly been admixed with fly ash and mineral powder, which not only reduces the amount of cement, but also improves the strength of concrete and enhances the durability of concrete. However, with the rapid development of hydropower construction, industrial and civil construction and other industries in recent years, the demand for fly ash and slag has increased rapidly, and the supply is often in short supply. In this case, it is imperative to seek an alternative admixture that is easy to obtain, high quality and low price. [0003] In recent years, with the depletion of natural sand resources, the application of artificial sand has beco...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/08C04B28/04C04B7/24
CPCY02P40/145Y02P40/10
Inventor 吴爱芹罗金垒杨涛于琦于飞邵圣凯
Owner QINGDAO QINGJIAN NEW MATERIAL GRP CO LTD
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