A kind of camellia saponin concrete air-entraining agent and preparation method thereof

A technology of camellia saponin and air-entraining agent is applied in the field of new green environmental protection materials to achieve the effects of strong penetrating ability, low energy consumption and low energy consumption

Active Publication Date: 2016-09-07
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0025] The purpose of the present invention is to overcome the defects of current concrete air-entraining agent and preparation method thereof, and provide a kind of camellia saponin concrete air-entraining agent and preparation method thereof

Method used

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  • A kind of camellia saponin concrete air-entraining agent and preparation method thereof
  • A kind of camellia saponin concrete air-entraining agent and preparation method thereof
  • A kind of camellia saponin concrete air-entraining agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Put 2.5 kg of camellia oleifera meal powder with 24 mesh fineness into the extraction tank, use 80% methanol aqueous solution of 15 times the dry weight (W / W) of camellia oleifera meal powder, extract by percolation at 37°C for 2 hours, filter, and select the intercepted The polysulfone membrane with a molecular weight of 20,000 was used for membrane separation and removal of impurities under the operating pressure of 0.40 MPa; after removing macromolecular impurities such as proteins and polysaccharides, the filtrate was selected from an aromatic polyamide membrane with a molecular weight cut-off of 200. Membrane separation removes small molecular impurities, and concentrates into a concentrated solution with a Baume degree of 21.6 Be (60°C), which is spray-dried into an air-entraining agent in a solid dosage form; an inorganic acid modifier of 1.8% by weight of the concentrated solution can also be added to directly Air-entraining agent made into liquid dosage form. A...

Embodiment 2

[0049] Put 3.1 kg of Camellia oleifera powder through a 16-mesh sieve into an extraction tank, use 5 times the dry weight (W / W) of Camellia oleifera powder in 90% ethanol aqueous solution, reflux extraction at 82°C for 1 hour, filter, and select the filtrate to intercept The polyvinylidene fluoride membrane with a molecular weight of 80,000 is used to separate and remove impurities under the operating pressure of 0.1 MPa; after removing macromolecular impurities such as proteins and polysaccharides, the filtrate uses a polysulfone membrane with a molecular weight cut-off of 6,000. Membrane separation removes small molecular impurities, and concentrates into a concentrated solution with a Baume degree of 10.2 Be (60°C), which is spray-dried into an air-entraining agent in a solid dosage form; an inorganic alkali modifier of 0.5% by weight of the concentrated solution can also be added to prepare Air-entraining agent in liquid dosage form. After testing, the yield of camellia sa...

Embodiment 3

[0051] Put 3.2 kg of camellia oleifera cake powder with a fineness of 16 mesh into the extraction tank, and use 76% methanol-80% ethanol (1:1) aqueous solution of 8 times the dry weight (W / W) of camellia oleifera cake powder at 56°C Under leaching for 2 hours, filter, the filtrate selects a polyacrylonitrile membrane with a molecular weight cut-off of 50,000, and the membrane separates and removes impurities under the operating pressure of 0.2 MPa; Polyamide membrane, under the operating pressure of 1.5 MPa, the membrane is separated to remove small molecular impurities, and concentrated into a concentrated solution with a Baume degree of 26.5 Be (60°C), and an alkaline salt modifier of 0.3% by weight of the concentrated solution is added to prepare Air-entraining agent in liquid dosage form. After testing, the yield of camellia saponin was 91.4%, the content of camellia saponin in the liquid air-entraining agent was 59.2%, and the pH value was 6.5.

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Abstract

The invention provides a camellia saponin concrete air-entraining agent and a preparation method thereof. The air-entraining agent is characterized in that it contains Camellia oleifera saponin; the preparation method is characterized in that: taking Camellia oleifera as a raw material, adopting a hydrophilic solvent aqueous solution, extracting and filtering under conditions above normal temperature; after the filtrate is separated by membrane under pressure to remove macromolecular impurities, Remembrane separation to remove small molecular impurities, and concentrated into a concentrated solution with a Baumé degree of not less than 10 Be (60 ° C), spray-dried into a solid dosage form; or by adding modifiers to make an air-entraining agent for liquid dosage forms. The invention has novel concept, abundant raw materials, high production efficiency, low production energy consumption, low production cost, simple preparation method, green environmental protection, convenient implementation, small amount of air-entraining agent, large gas production, and introduced bubble pore size during concrete engineering application. Small, small spacing, concrete pores are more uniform, dense, non-connected, and have greater promotion.

Description

technical field [0001] The invention relates to a preparation method of an environment-friendly saponin concrete air-entraining agent which is extracted from camellia oleifera and used for concrete engineering, and belongs to the field of novel green environment-friendly materials. Background technique [0002] Air-entraining agent is a kind of external additive that can make concrete produce a large number of uniform, stable and closed micro-bubbles during the mixing process, thereby improving its workability, and can still retain micro-bubbles after hardening to improve the durability of concrete against freezing and thawing. It is an important independent variety of concrete admixtures, and its main function is to improve the impermeability, frost resistance, salt frost erosion resistance and durability of concrete. [0003] Concrete durability is a research hotspot in the field of concrete engineering at home and abroad today, and the frost resistance and salt frost eros...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/10C04B103/30
Inventor 陈剑锋
Owner FUZHOU UNIV
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