Hydrolyzed animal blood meal cement foaming agent and its application in lightweight cement preparation

A technology of cement foaming agent and animal blood meal, which is applied in the field of preparation of lightweight cement and cement foaming agent

Inactive Publication Date: 2012-05-02
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the relatively mature protein foaming agents in the world, there is a big gap in the foaming abilit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] At 60°C, add 15g of bovine blood powder (obtained by drying and grinding fresh bovine blood) into 500mL of 2% sodium hydroxide aqueous solution, continue to stir at 60°C for 4 hours for hydrolysis, and then add a concentration of Add 18mL of 12mol / L hydrochloric acid to neutralize the reaction system, stop the hydrolysis, discard the waste residue by filtration, collect the filtrate, and obtain about 480mL of foaming agent stock solution.

[0019] Take 100g of the foaming agent stock solution prepared above, add 10mL, 0.1mol / L NaOH aqueous solution to adjust the pH of the foaming agent stock solution to 9, and then add 0.1g of AlCl 3 , then add 19g of urea and mix and stir for 5 hours, then add 1g of sodium dodecylbenzenesulfonate as detergent, mix and stir for 7 hours to obtain about 120g of hydrolyzed bovine blood powder cement foaming agent.

[0020] Mix and stir water, Portland rapid hardening cement (425R rapid hardening cement), fly ash and polypropylene fiber acc...

Embodiment 2

[0024] At a temperature of 55°C, add 15g of bovine blood powder (obtained by drying and grinding fresh bovine blood) into 500mL of 2% sodium hydroxide aqueous solution, continue to stir at 55°C for 7 hours, and then add a concentration of 12mol / Adjust 18 mL of 1 L hydrochloric acid to neutral to stop hydrolysis, discard the waste residue by filtration, collect the filtrate, and obtain about 480 mL of foaming agent stock solution.

[0025] Take 100g of foaming agent stock solution, add 10mL, 0.1mol / L NaOH aqueous solution to adjust the pH of foaming agent stock solution to 9, add 0.1g AlCl 3 , Add 25 g of guanidine hydrochloride (GdnHCl), and stir for 6 hours. Add 1g of sodium lauryl sulfate as detergent, mix and stir for 7 hours to obtain hydrolyzed bovine blood powder cement foaming agent, about 130g. The average diameter of the foam is 1 mm.

[0026] Water, rapid hardening cement (425R rapid hardening cement), fly ash and polypropylene fiber are mixed and stirred evenly a...

Embodiment 3

[0030] At 60°C, add 15g of bovine blood powder (obtained by drying and grinding fresh bovine blood) into 500mL of 4% calcium hydroxide aqueous solution, stir at 60°C for 4 hours, and then add hydrochloric acid with a concentration of 12mol / L Adjust 18mL to neutral to stop hydrolysis, discard the waste residue by filtration, collect the filtrate, and the stock solution of the foaming agent is about 480mL.

[0031] Other conditions were the same as in Example 2, and a foaming agent for hydrolyzed bovine blood powder cement similar to Example 1 was obtained. The average diameter of the foam is 1 mm.

[0032] Water, rapid hardening cement (425R rapid hardening cement), fly ash, and polypropylene fiber are mixed and stirred evenly at a mass ratio of 85:130:30:0.2 to obtain concrete slurry.

[0033] After diluting 130 g of the bovine blood meal cement foaming agent prepared by the present invention by 5 times with water, the mixture is uniformly stirred by high-speed machinery unti...

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Abstract

Belonging to the technical field of cement preparation, the invention specifically relates to a cement foaming agent with animal blood meal as a raw material and its application in lightweight cement preparation. The cement foaming agent is prepared by the steps of: in an alkaline solution, adding animal blood meal about 3%-5% of the weight of the alkaline solution, stirring the mixture for 4-8h and conducting hydrolyzation; then adjusting the reaction system to neutral, and stopping hydrolyzation, then removing waste residue by centrifugation or filtering, thus obtaining a foaming agent stock solution; adjusting the pH of the foaming agent stock solution to 8-9, adding a chelating agent, a stabilizing agent and a surfactant for stirring, thus obtaining a hydrolyzed animal blood meal cement foaming agent. The cement foaming agent prepared in the invention has table performance, high foam expansion rate, as well as low bleeding rate, and can generate foams with an average diameter of 0.5mm-3mm and independent pores. Lightweight cement products prepared by the cement foaming agent of the invention have low density, enclosed pores, different densities, low thermal conductivity, low sound absorption rate as well as good fire resistance and waterproofness, and are free of condition restriction and easy to implement.

Description

technical field [0001] The invention belongs to the technical field of cement preparation, and in particular relates to a cement foaming agent using animal blood meal as a raw material and its use for preparing lightweight cement (foamed concrete). technical background [0002] Foam concrete is a kind of porous material. Usually, foaming agent and aqueous solution are prepared into foam by mechanical means, and then the foam is added to the slurry composed of siliceous material, calcium material, water and various admixtures. It is made by mixing, pouring, molding and curing. [0003] With the development of modern buildings towards high-rise and large-scale development, the self-weight of building materials has attracted more and more attention. As a porous material, foam concrete has become one of the materials that can replace traditional clay bricks due to its light weight, high strength, low carbon, waste utilization, fire prevention, thermal insulation, and sound insu...

Claims

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Application Information

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IPC IPC(8): C04B38/02C04B28/04
Inventor 王艾菲郭明义单敏萍朱广山
Owner JILIN UNIV
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