Preparation method of plastic concrete with high water-binder ratio

A technology of plastic concrete and high water gel, which is applied in the field of plastic concrete preparation, can solve the problems of low plastic concrete water gel, high compressive strength, and low permeability coefficient, and achieve high compressive strength, good construction workability, and permeability The effect of coefficient reduction

Inactive Publication Date: 2022-04-15
JIANGSU UNIV OF SCI & TECH
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Problems solved by technology

[0004] Purpose of the invention: The purpose of the present invention is to provide a method for preparing plastic concrete with a high water-to-cement ratio, which solves the problem of plastic concrete water-to-cement ratio in the prior art to meet design requirements such as fluidity, unconfined compressive strength, and permeability coefficient. low porosity, low permeability coefficient, high compressive strength and low price

Method used

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  • Preparation method of plastic concrete with high water-binder ratio
  • Preparation method of plastic concrete with high water-binder ratio
  • Preparation method of plastic concrete with high water-binder ratio

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preparation example Construction

[0022] As shown in the figure, a method for preparing plastic concrete with a high water-binder ratio according to the present invention comprises the following steps:

[0023] Step 1: Mix water and bentonite, and stir evenly, then seal and place in a constant temperature box at a temperature of 20°C for 24 hours to make it fully expanded to obtain bentonite slurry, which is ready for use;

[0024] Wherein, the weight ratio of water and bentonite in the bentonite slurry is 22:4, usually, the weight part of water is 22, and the weight part of bentonite is 3-4;

[0025] The water used is deionized water with conductivity less than 0.1μs / cm;

[0026] The bentonite is at least one of calcium-based bentonite and sodium-based bentonite, and the particle size is 0.075-0.5mm;

[0027] Step 2: Dry mix cement, slag powder, steel fiber, and sand evenly to obtain a mixed dry material for use;

[0028] Wherein, the weight ratio of cement, slag powder, steel fiber and sand in the mixed dr...

Embodiment 1

[0034] Embodiment 1: The present embodiment provides a kind of high water-binder ratio plastic concrete, comprises: the water of 22 parts by weight, the Inner Mongolia bentonite of 4 parts by weight, the cement of 2 parts by weight, the slag powder of 7 parts by weight, the slag powder of 1 part by weight Steel fiber, 64 parts by weight of sand, i.e. plastic concrete with a water-binder ratio of 1.7;

[0035] Specifically, 4 parts by weight of Inner Mongolia bentonite was poured into 22 parts by weight of water, and stirred for 120s, then sealed and placed in a thermostat at a temperature of 20°C for 24 hours, and the conductivity of the water used was deionized water of 0.098 μs / cm , Inner Mongolia bentonite is calcium-based bentonite with a particle size of 0.1 mm; after Inner Mongolia bentonite is expanded for 24 hours, mix 2 parts by weight of cement, 7 parts by weight of slag powder, 1 part by weight of steel fiber and 64 parts by weight of sand and stir for 60 seconds , ...

Embodiment 2

[0036] Embodiment 2: The present embodiment provides a kind of high water-binder ratio plastic concrete, comprises: the water of 22 parts by weight, the Inner Mongolia bentonite of 3 parts by weight, the cement of 1 part by weight, the slag powder of 7 parts by weight, the slag powder of 1 part by weight Steel fiber, 66 parts by weight of sand, i.e. plastic concrete with a water-binder ratio of 2.1;

[0037] Specifically, 3 parts by weight of Inner Mongolia bentonite was poured into 22 parts by weight of water, and stirred for 120s, then sealed and placed in a constant temperature box at a temperature of 20°C for 24 hours, and the conductivity of the water used was deionized water of 0.098 μs / cm , Inner Mongolia bentonite is calcium-based bentonite with a particle size of 0.1 mm; after Inner Mongolia bentonite is expanded for 24 hours, mix 1 weight part of cement, 7 weight parts of slag powder, 1 weight part of steel fiber and 66 weight parts of sand and stir for 60 seconds , ...

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Abstract

The invention discloses a preparation method of plastic concrete with a high water-binder ratio. Belongs to the technical field of plastic concrete preparation. The preparation method comprises the following specific steps: 1, mixing water and bentonite, uniformly stirring, and sealing and placing in a thermotank at the temperature of 20 DEG C for 24 hours to obtain bentonite slurry; 2, cement, slag powder, steel fibers and sand are mixed and evenly mixed in a dry mode, and a mixed dry material is obtained; 3, stirring the bentonite slurry placed for 24 hours in the step 1 again to obtain fully expanded bentonite slurry; and 4, doping the mixed dry material prepared in the step 2 into the bentonite slurry fully puffed in the step 3, uniformly mixing and stirring, curing and forming, and finally preparing the plastic concrete with the high water-binder ratio. The plastic concrete prepared by the invention can increase the water-binder ratio and reduce the cement consumption, avoids the bleeding and segregation phenomena of the plastic concrete under the condition of not adding a water reducer, and has the advantages of small porosity, low permeability coefficient, high compressive strength, low price and the like.

Description

technical field [0001] The invention relates to the technical field of plastic concrete preparation, and relates to a method for preparing plastic concrete with a high water-binder ratio. Background technique [0002] Plastic concrete is widely used in water conservancy and hydropower projects, sewage treatment projects and landfill restoration projects due to its advantages of high fluidity, low elastic modulus, and good impermeability. At present, the water-binder ratio of plastic concrete is mostly below 1.3. A lower water-binder ratio will lead to a larger amount of cement, while increasing the water-binder ratio will cause bleeding and segregation of plastic concrete materials, and the porosity and permeability coefficient will increase. Reduced compressive strength. [0003] Therefore, it is very meaningful and marketable to develop a plastic concrete material that can not only increase the water-binder ratio, but also avoid bleeding and segregation, and ensure that t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCY02W30/91C04B28/04
Inventor 胡梦狄周爱兆徐浩青侯绍雯徐成皓陈建国梁景瑞王梦鸽
Owner JIANGSU UNIV OF SCI & TECH
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