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A design method of machine-made sand concrete mix ratio with fluctuating mica content in stone powder

A mix ratio design and machine-made sand technology, which is applied in the field of building materials, can solve problems such as the adverse effects of concrete strength, achieve the effects of avoiding insufficient human experience, improving cohesion and water retention, and significant application value

Active Publication Date: 2022-03-04
河北思动环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problem that the fluctuation of the mica content of the machine-made sandstone powder has an adverse effect on the strength of the concrete, and to provide a method for designing the mix ratio of the machine-made sand concrete with the fluctuation of the mica content in the stone powder

Method used

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  • A design method of machine-made sand concrete mix ratio with fluctuating mica content in stone powder
  • A design method of machine-made sand concrete mix ratio with fluctuating mica content in stone powder
  • A design method of machine-made sand concrete mix ratio with fluctuating mica content in stone powder

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Embodiment 1

[0018] Taking the machine-made sand concrete with strength grade C30 and slump 200mm as an example, the concrete mix design is carried out according to the following steps:

[0019] (1) Using JY / T009-1996 "General Principles of Polycrystalline X-ray Diffraction Method for Turning Targets", the fluctuation range of mica content in stone powder less than 0.16mm is 1.0% to 5.0%;

[0020] (2) Based on the minimum mica content of 1.0% in the machine-made sand and gravel powder, determine the corresponding sand rate: first determine the mica content 0% according to the "Ordinary Concrete Mix Design Regulations" JGJ 55 according to the fineness modulus of the machine-made sand Corresponding sand ratio β s =42%, and then calculate and determine the sand rate β corresponding to the mica content of 1.0% based on the method that the mica content increases by 1.5% and the sand rate decreases by 1%. / s = 41.3%;

[0021] Take the mica content of 1.0% in the machine-made gravel powder an...

Embodiment 2

[0025] Taking the machine-made sand concrete with strength grade C40 and slump of 200mm as an example, the concrete mix design is carried out according to the following steps:

[0026] (1) Using JY / T009-1996 "General Principles of Polycrystalline X-ray Diffraction Method for Turning Targets", the fluctuation range of mica content in stone powder less than 0.16mm is 1.0% to 5.0%;

[0027](2) Based on the minimum mica content of the machine-made sand 1.0%, determine the corresponding sand rate: first determine the corresponding sand ratio of the machine-made sand fineness modulus according to the "Ordinary Concrete Mix Proportion Design Regulations" JGJ 55 Sand rate β s =39%, and then calculate and determine the sand rate β corresponding to the mica content 1.0% by calculating the sand rate β for every 1.5% increase in the mica content. / s = 38.3%;

[0028] Taking the content of machine-made sand mica as 1.0% and its corresponding sand ratio β / s 38.3% as the benchmark, t...

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Abstract

A mixing ratio design method for machine-made sand concrete with fluctuating mica content in stone powder is to design admixture components based on the minimum mica content and its corresponding sand ratio within the required fluctuating range of mica content in machine-made sand and stone powder, according to " Ordinary Concrete Mix Proportion Design Regulations” JGJ 55 stipulates that the mass method is used to calculate and determine the minimum mica content benchmark machine-made sand concrete mix design parameters; after that, based on the minimum mica content value, every 1.5% increase in mica content corresponds to a 1% decrease in sand rate Calculate the sand rate corresponding to the machine-made sand concrete under the content of on-site stone powder mica by using the amplitude method, and calculate and determine the design parameters of the machine-made sand concrete mix ratio. On the premise that the strength of machine-made sand concrete with fluctuating mica content in stone powder meets the design requirements, the present invention solves the technical problem that the fluctuation of mica content in stone powder adversely affects the strength of machine-made sand concrete, and is suitable for machine-made sand concrete with fluctuating mica content in stone powder. Bi design provides a new design method.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a method for designing the mix ratio of machine-made sand concrete with fluctuating mica content in stone powder. Background technique [0002] Manufactured sand refers to rock particles made by mechanical crushing and screening with a particle size of less than 4.75mm, but does not include particles of soft rock and weathered rock. When using gneiss, amphibolite and basalt to produce machine-made sand, the change of the mica composition of the parent rock will lead to large fluctuations in the content of mica in the produced machine-made sand powder. The flaky structure and obvious cleavage of mica particles will lead to an increase in the unit water consumption of machine-made sand concrete and a decrease in concrete strength. The "Building Sand" GB / T 14684 standard specifies the content of mica particles larger than 0.3mm in machine-made sand: Type I < 1.0%, Typ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G16C20/30C04B28/04
CPCG16C20/30C04B28/04C04B18/08C04B18/141C04B14/06C04B14/02C04B22/002C04B2103/302C04B24/24C04B24/10C04B22/14C04B24/20C04B24/383C04B24/42
Inventor 高礼雄徐仁豪高莹宋作宝高春勇吴浩张彦李红辉蔡俊华卢坤鹏
Owner 河北思动环保科技有限公司