A Control Method of Concrete Pumpability Based on Rheological Properties

A control method and concrete technology, applied in the direction of data processing applications, instruments, calculations, etc., can solve the problems that have not yet considered characteristics, construction costs, and insufficient accuracy of concrete, and achieve convenience and economy, obvious social and economic benefits, good applicability

Active Publication Date: 2021-05-25
SHANGHAI CONSTRUCTION GROUP
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  • Application Information

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Problems solved by technology

[0006] In view of the lack of accuracy of the current concrete pumpability evaluation method, the characteristics of modern concrete mixtures and construction costs have not been considered.

Method used

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  • A Control Method of Concrete Pumpability Based on Rheological Properties
  • A Control Method of Concrete Pumpability Based on Rheological Properties

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Embodiment 1

[0030] Please refer to figure 1 with figure 2 , a concrete pumpability control method based on rheological properties, the steps of the method are as follows:

[0031] Step 1. For concrete mixtures of different strength grades (such as C30, C35, C40, C60, etc.), adjust the mix ratio design to form concrete mixtures with different strength grades and different expansion degrees;

[0032] Step 2. For concrete mixtures with different strength grades and different expansion degrees (such as 300mm, 400mm, 500mm, 600mm, etc.), respectively detect their rheological parameters (such as plastic viscosity μ, etc.);

[0033] Step 3. For concrete mixtures of different strength grades, take the expansibility index as the abscissa and the plastic viscosity index as the ordinate, and fit the relationship curve μ=f(U ) = aU 2 +bU+c, among them, μ is the plastic viscosity, U is the degree of expansion, according to which the lower limit of the plastic viscosity index corresponding to the i...

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Abstract

The invention relates to a concrete pumpability control method based on rheological properties, which belongs to the technical field of construction engineering concrete. In view of the lack of accuracy of the current concrete pumpability evaluation method. This method first uses the plastic viscosity index and the expansion degree index to fit the relationship curve between the plastic viscosity and the expansion degree index of concrete of different strength grades, breaking through the traditional evaluation limitations of "the greater the concrete expansion degree, the more favorable the pumping construction" , to effectively ensure the quality of concrete in pumping construction; at the same time, through the comprehensive cost index and plastic viscosity index, the relationship curve between the comprehensive cost index and plastic viscosity index of concrete of different strength grades is fitted to determine the concrete plastic viscosity index suitable for pumping construction , to reduce the cost of concrete pumping construction; through the scientific determination of the expansion degree index, a concrete pumpability control method based on rheological properties is finally formed to ensure the smooth progress of the project.

Description

technical field [0001] The invention belongs to the technical field of construction engineering concrete, in particular to a concrete pumpability control method based on rheological properties. Background technique [0002] In order to meet the higher, larger, faster and more complex construction requirements of modern concrete structural engineering, compared with traditional concrete, the composition and performance characteristics of modern concrete have undergone major changes, among which the rheological properties of concrete The change will have a significant impact on its pumping performance. [0003] The traditional evaluation of the pumping performance of modern concrete based on the slump and expansion index of the pump (such as the industry standard "Technical Regulations for Concrete Pumping Construction" JGJ / T10-2011) has great limitations. Practice has shown that the greater the degree of expansion is not, the more suitable it is for pumping construction, bec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/06G06Q50/08
CPCG06Q10/0639G06Q50/08
Inventor 徐俊许永和
Owner SHANGHAI CONSTRUCTION GROUP
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