Sasanqua 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 low energy consumption, improved purity and low energy consumption

Active Publication Date: 2013-12-25
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 prepa

Method used

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  • Sasanqua saponin concrete air entraining agent and preparation method thereof
  • Sasanqua saponin concrete air entraining agent and preparation method thereof
  • Sasanqua 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 sasanqua saponin concrete air entraining agent and a preparation method thereof. The air entraining agent is characterized by containing sasanqua saponin therein. The preparation method is characterized by extracting sasanqua as a raw material at normal temperature by hydrophilic solvent water solution, and filtering; removing large-molecule impurities from the filtrate by membrane separation under pressure, removing small-molecule impurities by membrane separation, concentrating to be concentrate with Baume degree of not lower than 10Be (60 DEG C), and spray-drying to form solid formulation; or adding a modifying agent to prepare the air entraining agent in liquid formulation. The idea is novel, the raw materials are abundant, the production efficiency is high, the energy consumption in the production is low, the production cost is low, the preparation method is simple in process, green and environment-friendly and is convenient to implement; when the air entraining agent is used in concrete engineering, the dosage of the air entraining agent is low, the air production rate is high, the aperture of the entrained air bubbles is small and the distance among the entrained air bubbles is small, and the air holes of the concrete are more even, more compact and non-communicated, therefore, the sasanqua saponin concrete air entraining agent is valuable for popularizing.

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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IPC IPC(8): C04B24/10C04B103/30
Inventor 陈剑锋
Owner FUZHOU UNIV
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