Process for preparing composite foamed cement

A composite foamed cement and preparation process technology, applied in ceramic products, applications, household appliances, etc., can solve the problems of not having the conditions for widespread use in the market, not having market competitiveness, not being suitable for large-scale production, etc. The wall thickness is balanced and controllable, the bubble diameter is small, uniform and controllable, and the foam height is high.

Active Publication Date: 2014-12-10
HUBEI KAILIFENG GREEN BUILDING MATERIALS DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, this "mechanical foaming" composite foaming cement preparation method requires a large number of turnover mold boxes when processing insulation boards; a large area of ​​turnover space is required; a large amount of transshipment labor is required; the finished product has a long tur

Method used

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  • Process for preparing composite foamed cement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1) Premixing: 63kg cement, 25kg fly ash ceramsite, 4kg micro silica fume, 0.55kg water reducer, 1.5kg aluminum sulfate, 0.01kg fiber, 0.60kg graphite, 0.58kg sodium sulfate, 0.58kg cellulose, 2.0kg of heavy calcium, 1.6g of phase change powder, dry mixed evenly to make a premix and store it in a storage tank for use;

[0039] 2) Foaming: Put the premix in step 1) and hot water at 40°C into the mixing tank and stir for 5 minutes (the hot water at 40°C accounts for 30% of the mass of the premix), and then pour them into the mixing tank in turn Add 0.68kg polyacrylamide, 0.01kg lithium carbonate, 0.035kg rubber powder, 0.75kg calcium stearate, 0.75kg801 rubber powder, 0.45kg sodium silicate, 0.55kg zinc stearate emulsion, 8.3kg mass concentration is 12.5% Oxidizing agent, continue stirring 5 minutes and make slurry;

[0040] 3) Pre-coagulation: inject the slurry in step 2) into the mold box of the pre-coagulation pit, and at the same time, supply 83°C hot water to the pre...

Embodiment 2

[0043] 1) Premixing: 80kg cement, 20kg fly ash ceramsite, 2kg micro silica fume, 1.25kg water reducer, 0.9kg aluminum sulfate, 0.03kg fiber, 0.75kg graphite, 1.0kg sodium sulfate, 0.75kg cellulose, 1.0kg of heavy calcium, 3.0g of phase change powder, after dry mixing evenly, make a premix and store it in a storage tank for use;

[0044] 2) Foaming: Put the premix in step 1) and hot water at 65°C into the mixing tank and stir for 5 minutes (the hot water at 65°C accounts for 22% of the mass of the premix), and then pour it into the mixing tank in turn Add 1.1kg polyacrylamide, 0.015kg lithium carbonate, 0.0125kg rubber powder, 1.5kg calcium stearate, 1.5kg801 rubber powder, 0.5kg sodium silicate, 1.0kg zinc stearate emulsion, 10.5kg mass concentration is 12.5% Oxidizing agent, continue stirring 5 minutes and make slurry;

[0045] 3) Pre-coagulation: inject the slurry in step 2) into the mold box of the pre-coagulation cellar, and at the same time, supply 100°C hot water to the...

Embodiment 3

[0048] 1) Premixing: 95.5kg polyvinyl chloride, 24.3kg fly ash ceramsite, 4.5kg microsilica fume, 0.35kg water reducer, 0.48kg aluminum sulfate, 0.023kg fiber, 0.64kg graphite, 1.35kg sodium sulfate, 1.03kg of cellulose, 0.76kg of heavy calcium, and 1.33g of phase change powder, which are uniformly dry-mixed to make a premix and stored in a storage tank for use;

[0049] 2) Foaming: put the premix in step 1) and hot water at 60°C into the mixing tank and stir for 5 minutes (the hot water at 60°C accounts for 16% of the mass of the premix), and then pour it into the mixing tank in turn Add 0.1.72kg polyacrylamide, 0.04kg lithium carbonate, 0.033kg rubber powder, 1.65kg calcium stearate, 1.5kg801 rubber powder, 0.8kg sodium silicate, 1.55kg zinc stearate emulsion, 8.8kg mass concentration is 12.5 % oxidizing agent, continue to stir and make slurry in 5 minutes;

[0050] 3) Pre-coagulation: inject the slurry in step 2) into the mold box of the pre-coagulation pit, and at the sam...

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Abstract

The invention discloses a process for preparing composite foamed cement. The process comprises the following steps: premixing, namely, uniformly mixing a gel material, lightweight aggregate and a multifunctional additive, subsequently preparing the above components into premix, and storing the premix in a storage tank for later use; foaming, namely, feeding the premixed premix and hot water into a stirring tank, stirring for 5 minutes, sequentially adding a composite modifier and an oxidant into the stirring tank, and continuously stirring for 5 minutes, thereby obtaining slurry; pre-coagulating, namely, filling the foamed slurry into a mold box of a pre-coagulating kiln, simultaneously supplying hot water into the pre-coagulating kiln continuously so as to foam and expand the slurry inside the mold box, thereby preparing the composite foamed cement, and standing the composite foamed cement in the mold box for 6-8 minutes, thereby forming a composite foamed cement initial set object; and demolding and cutting, namely, demolding and cutting the pre-coagulated composite foamed cement initial set object into a plate material, thereby preparing the formed composite foamed cement. The composite foamed cement prepared by using the process is high in mechanical strength, free of foaming, high in foaming strength, rapid to coagulate and dry, short in demolding time and free of maintenance period, can save the space, the energy, the labor and the time, and can be cut in a wet manner.

Description

technical field [0001] The invention relates to a preparation method of composite foamed cement, and belongs to the field of preparation of novel materials. Background technique [0002] Composite foamed cement is a member of the concrete family. As the name implies, concrete is foamed or foamed, so it is also called foamed cement, lightweight concrete, etc. It is a waste-reducing, environmentally friendly, energy-saving, low-cost Carbon, economical, practical and non-combustible new building energy-saving materials with a fire rating of A. In recent years, both at home and abroad have attached great importance to the research and development of composite foamed cement, making it more and more widely used in the field of construction. At present, composite foamed cement is more and more widely used in building insulation materials in my country because of its good thermal insulation and fireproof characteristics, mainly including: roof insulation layer cast-in-situ, floor i...

Claims

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Application Information

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IPC IPC(8): C04B38/02C04B28/00C04B26/04C04B24/26
Inventor 王义红卢叶张林江
Owner HUBEI KAILIFENG GREEN BUILDING MATERIALS DEV CO LTD
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