Machine-made sand concrete using synergist and preparation method of machine-made sand concrete

A machine-made sand and concrete technology, which is applied in the field of machine-made sand concrete, can solve the problems of slow increase in construction pumping strength, easy segregation and bleeding of the mixture, and difficult loss of slump, so as to improve resource utilization and conversion efficiency and improve water quality. Chemical process, solve the effect of water retention

Inactive Publication Date: 2020-11-17
中建西部建设贵州有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with natural sand, machine-made sand has certain shortcomings in fineness modulus, grain shape, gradation, and angularity. Compared with natural sand, machine-made sand has a larger fineness modulus, poorer gradation, rough grain surface, Strong edges and corners, freshly mixed machine-made sand concrete has disadvantages such as poor workability, easy segregation and bleeding of the mixture, excessive slump loss, difficulty in construction pumping, and slow strength growth of machine-made sand concrete in the later stage.

Method used

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  • Machine-made sand concrete using synergist and preparation method of machine-made sand concrete

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) The machine-made sand concrete synergist is taken by weighing the raw materials according to the mass percentage of each raw material, and 0.3% nanometer CaCO 3 Added into 16% hexenyl bis stearamide and dispersed ultrasonically to prepare nano-CaCO 3 Dispersions.

[0023] (2) Mix 19% of triethylenetetramine, 0.2% of potassium glycinate of coconut oil fatty acid, 0.09% of alkanolamide, and 64.41% of water, stir at 40°C for 1.5h, and then add the above-mentioned nano-CaCO 3 The dispersion liquid was stirred continuously for 0.5h to obtain the machine-made sand concrete synergist.

[0024] (3) Prepare concrete according to the ingredients in Table 2 by using the secondary feeding method, pour the weighed machine-made sand, gravel, and 60% water into the mixer and stir for 60 seconds, then add cement, fly ash, mineral powder and the remaining 40% The water, synergist, and water reducing agent were stirred for 1-2 minutes to obtain machine-made sand concrete, and the c...

Embodiment 2

[0026] (1) The machine-made sand concrete synergist is taken by weighing the raw materials according to the mass percentage of each raw material, and 0.4% nanometer CaCO 3 Add it to 18% monoglyceride stearate and disperse it ultrasonically to make nano-CaCO 3 Dispersions;

[0027] (2) Mix 20% triglycerol, 0.3% sodium coconut oil fatty acid alanine, 0.1% lauryl dimethylamine oxide, and 61.2% water, stir at 50°C for 2h, and then add the above-mentioned nano-CaCO 3 Dispersion liquid, continue to stir for 1h, obtain machine-made sand concrete synergist;

[0028] (3) Prepare concrete according to the ingredients in Table 2 by using the secondary feeding method, pour the weighed machine-made sand, gravel, and 60% water into the mixer and stir for 60 seconds, then add cement, fly ash, mineral powder and the remaining 40% The water, synergist, and water reducer are stirred for 1-2 minutes to obtain machine-made sand concrete.

Embodiment 3

[0030] (1) The machine-made sand concrete synergist is weighed according to the mass percentage of each raw material, and 0.5% nanometer CaCO 3 Add it to 20% glyceryl tristearate and disperse it ultrasonically to make nano-CaCO 3 Dispersions;

[0031] (2) Mix 25% of triethylenetetramine, 0.6% of coconut oil fatty acid sodium alanine, 0.3% of lauryl dimethyl amine oxide, and 53.65% of water, stir at 60°C for 2.5h, and then add the above nano CaCO 3 Dispersion liquid, continue to stir for 1.5h, obtain machine-made sand concrete synergist;

[0032] (3) Prepare concrete according to the ingredients in Table 2 by using the secondary feeding method, pour the weighed machine-made sand, gravel, and 60% water into the mixer and stir for 60 seconds, then add cement, fly ash, mineral powder and the remaining 40% The water, synergist, and water reducer are stirred for 1-2 minutes to obtain machine-made sand concrete.

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Abstract

The invention discloses machine-made sand concrete using a synergist and a preparation method of the machine-made sand concrete. The concrete comprises the following components and a formula: 395-435parts of cement; 0-30 parts of fly ash; 0-30 parts of mineral powder; 900.15-920.55 part of machine-made sand; 864.85-884.45 parts of broken stone; 9.1-9.9 parts of an additive; 2.73-2.97 parts of a synergistic agent; and 153-170 parts of water. The synergist component comprises a reinforcing agent, a dispersing agent, nano calcium carbonate, a foaming agent, a foam stabilizer and water. Accordingto the invention, the inherent advantages of the machine-made sand are brought into full play, and the problem of shortage of natural sand resources is effectively relieved; use amount of cement in the same grade of machine-made sand concrete can be reduced and the strength of the machine-made sand concrete is not changed or even higher, the durability of the machine-made sand concrete is improved, the cost of the machine-made sand concrete is reduced, and the cracking risk of the concrete can be reduced.

Description

technical field [0001] The invention relates to the technical field of machine-made sand concrete, in particular to a machine-made sand concrete using a synergist and a preparation method thereof. Background technique [0002] The cement industry is an industry with high energy consumption, high pollution and high resource consumption. In order to ensure the sustainable development of the construction industry, it is necessary to use various methods to effectively reduce the amount of cement in single-square concrete on the premise of ensuring the mechanical properties and durability of concrete structures. The commonly used method to reduce cement consumption in the prior art is to use industrial waste. The industrial waste consumed by the concrete industry is mainly slag and fly ash, including various metallurgical slags such as phosphorus slag, steel slag, and vanadium-titanium slag. Concrete admixture is different from cement clinker, only the hydration reaction occurs ...

Claims

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Application Information

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IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B2111/00017
Inventor 林喜华路东义何凯赵士豪柯旭叶鸿宏杨光林何欣王军
Owner 中建西部建设贵州有限公司
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