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Synergist for reducing stone powder adsorption performance in siliceous machine-made sand and preparation method thereof

A technology of stone powder and adsorption performance in sand is applied in the field of synergist for reducing the adsorption performance of stone powder in siliceous manufactured sand and its preparation field, which can solve problems such as poor concrete performance, achieve small slump loss, fast movement speed, Slump loss reduction effect

Active Publication Date: 2019-04-12
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a synergist for reducing the adsorption performance of stone powder in siliceous machine-made sand, so as to solve the technical problem of poor concrete performance caused by stone powder in siliceous machine-made sand existing in the prior art

Method used

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  • Synergist for reducing stone powder adsorption performance in siliceous machine-made sand and preparation method thereof
  • Synergist for reducing stone powder adsorption performance in siliceous machine-made sand and preparation method thereof
  • Synergist for reducing stone powder adsorption performance in siliceous machine-made sand and preparation method thereof

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Embodiment 1

[0028] The modified synergist for the adsorption performance of stone powder in siliceous machine-made sand provided by the present invention comprises the following raw materials in parts by weight: 50-60 parts of adsorption and dispersing components; 20-25 parts of adsorption and chelation components; retarding 0-30 parts of components, 0-10 parts of other performance-improving components, the adsorption and dispersion components are one or more of the air-entraining surfactants of alcohol amines; the adsorption and chelation components are organic One or both of phosphine and inorganic phosphorus compounds.

[0029] Due to the fine particle size and large specific surface area of ​​siliceous stone powder, it can absorb a large amount of polycarboxylate water reducer, resulting in poor workability. In addition, due to the reduction of effective polycarboxylate water reducer, siliceous stone powder cannot be effectively dispersed, resulting in some A large amount of stone pow...

Embodiment 2

[0036] In the synergist for reducing the adsorption performance of stone powder in siliceous machine-made sand provided by the present invention, the adsorption and dispersion component is triisopropanolamine, 60 parts; the adsorption and chelation component is diethylene triaminepentamethylene phosphoric acid, 25 parts .

Embodiment 3

[0038] Among synergists, air-entraining surfactants include triisopropanolamine and diethylenetriamine, 50 parts, in a ratio of 1:2; the adsorption and chelation components are all organophosphorus compounds, including diethylenetriaminepenta Fork phosphoric acid and tetrasodium hydroxyethylene diphosphate, 20 parts, the ratio is 1:1; the retarding component is glucose, 5 parts; other performance improving components are sodium polyacrylate 2 parts; the early strength component is calcium formate , 1 serving.

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Abstract

The invention provides a synergist for reducing the stone powder adsorption performance in siliceous machine-made sand and a preparation method thereof, and belongs to the field of machine-made sand concrete preparation. The synergist comprises, by weight, the following raw materials: 50-60 parts of a adsorption and dispersion component, 20-25 parts of an adsorption and chelating component; 0-30 parts of a retarding component; 0-10 parts of other performance improving components; the adsorption and dispersion component is one or a combination of a plurality of air-entraining surfactants; and the adsorption chelating component is one or a combination of two of an organophosphorus compound and inorganic phosphorus compound. The synergist for reducing the stone powder adsorption performance in the siliceous machine-made sand can improve the workability and strength of concrete, maintain the slump of the concrete, has low mixing amount and low cost, and has a better effect on the machine-made sand with high content of the stone powder.

Description

technical field [0001] The invention belongs to the technical field of concrete preparation, and more specifically relates to a synergist for reducing the adsorption performance of stone powder in siliceous machine-made sand and a preparation method thereof. Background technique [0002] Concrete is an important building material. With the development of civil engineering, more and more concrete has been used in large quantities. However, sand as an important component of concrete, due to a large number of developments, has led to a serious shortage of high-quality river sand, which seriously restricts the production of concrete. In order to improve this problem, more and more machine-made sand is used in concrete, which can not only alleviate the constraints caused by the shortage of river sand, but also bring greater convenience to remote areas and areas lacking high-quality sand. It is the use of local parent rock, artificial sand made after certain crushing and particle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/12C04B24/26
CPCC04B40/0039C04B24/122C04B24/003C04B22/16C04B24/10C04B2103/40C04B24/121C04B24/26C04B24/04
Inventor 刘娟红张广田张月月周昱程吴瑞东付士峰谷峪
Owner UNIV OF SCI & TECH BEIJING
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