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Cement-based foamed lightweight composite material and preparation method thereof

A composite material and cement-based technology, applied in ceramic products, applications, household appliances, etc., can solve the problems of insufficient strength and achieve uniform distribution, improved strength and toughness, and regular shape

Active Publication Date: 2018-04-20
广东泰禾建设有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem existing in the foam cement light material density less than 0.7g / cm 3 In order to solve the problem that the strength cannot meet the requirements, a cement-based foamed lightweight composite material and its preparation method are provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Step 1: Preparation of graphene oxide nanosheet suspension

[0029] Add 8 parts of concentrated phosphoric acid and 60 parts of concentrated sulfuric acid into the three-necked flask in sequence and stir evenly at 0°C, then add the mixture of 4 parts of powdered graphite and 10 parts of potassium permanganate into the three-necked flask within 1 hour After stirring at 0°C for 3 hours at a constant temperature, raise the temperature to 50°C. After reacting for 5 hours, add 200 parts of deionized water and continue the reaction for 30 minutes. After cooling down to 25°C, slowly add 30% of 6 parts of hydrogen peroxide were added for 30 minutes, and the reaction was continued for 30 minutes after the solution turned golden yellow to obtain a graphene oxide product. Then the product is repeatedly centrifuged and washed with deionized water until the pH of the washing water is 6.5 and barium sulfate solution is used to check that there is no sulfate ion in the washing liquid,...

Embodiment 2

[0035] Step 1: Preparation of graphene oxide nanosheet suspension

[0036] Add 10 parts of concentrated phosphoric acid and 90 parts of concentrated sulfuric acid into the three-necked flask in sequence and stir evenly at 5°C, then add the mixture of 5 parts of powdered graphite and 15 parts of potassium permanganate into the three-necked flask within 1 hour After 3 hours of constant temperature reaction under stirring at 5°C, raise the temperature to 50°C, after 5 hours of reaction, add 300 parts of deionized water, continue to react for 30 minutes, after cooling down to 25°C, slowly add 30% by mass fraction of 10 parts of hydrogen peroxide, the addition time is 30 minutes, and the reaction is continued for 30 minutes after the solution turns golden yellow to obtain the graphene oxide product. Then the product is repeatedly centrifuged and washed with deionized water until the pH of the washing water is 7.0 and barium sulfate solution is used to check that there is no sulfate...

Embodiment 3

[0042] Step 1: Preparation of graphene oxide nanosheet suspension

[0043] Add 9 parts of concentrated phosphoric acid and 70 parts of concentrated sulfuric acid into the three-necked flask in sequence and stir evenly at 3°C, then add the mixture of 3 parts of powdered graphite and 13 parts of potassium permanganate into the three-necked flask within 1 hour After 3 hours of constant temperature reaction under stirring at 3°C, raise the temperature to 50°C, after 5 hours of reaction, add 250 parts of deionized water, continue the reaction for 30 minutes, after cooling down to 25°C, slowly add 30% of the mass fraction of 8 parts of hydrogen peroxide, the addition time is 30 minutes, and the reaction is continued for 30 minutes after the solution turns golden yellow to obtain the graphene oxide product. Then the product is repeatedly centrifuged and washed with deionized water until the pH of the washing water is 7.0 and barium sulfate solution is used to check that there is no s...

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Abstract

The invention discloses a cement-based lightweight foam composite material and a preparation method thereof. The cement-based lightweight foam composite material is prepared from, by weight, 100-150 parts of Portland cement, 30-45 parts of fine sand, 40-50 parts of water, 0.4-0.6 part of foaming agent, 0.3-0.5 part of foam stabilizing agent and 10-15 parts of oxidized graphene nano lamellar suspension liquid. The preparation method includes: well mixing the Portland cement and the fine sand, sequentially adding the water, the foaming agent, the foam stabilizing agent and the oxidized graphene nano lamellar suspension liquid, and mixing for foaming to obtain foam slurry; injecting the foam slurry into a mould to realize moulding, and respectively curing for 2h at the temperature of 30 DEG C, 40 DEG C and 30 DEG C to obtain the cement-based lightweight foam composite material. Compressive strength of the cement-based lightweight foam composite material with the density being 0.6-0.7g / cm<3> is larger than 2.5MPa, and various constructional engineering requirements can be met.

Description

technical field [0001] The invention belongs to the field of preparation of cement-based lightweight composite materials, and relates to a cement-based foamed lightweight composite material and a preparation method. technical background [0002] In recent years, driven by the general trend of global energy conservation and emission reduction, the development of energy-saving, green and recyclable composite building materials has attracted widespread attention at home and abroad. At present, cement-based foamed lightweight building materials with green, environmental protection, heat preservation, fire prevention, energy saving and other properties have been widely developed and applied in the construction field. Cement-based composite lightweight foam composite material is a lightweight composite building material with a large amount of porous structure prepared by using cement as the cementitious material, fine sand and foaming agent through a special foam mixing process, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/02C04B28/04C04B24/38C04B22/06C04B111/40
CPCC04B28/04C04B2201/50C04B14/06C04B2103/0068C04B2103/48C04B22/06C04B38/0051C04B24/14C04B24/38
Inventor 吕生华胡浩岩朱琳琳邓丽娟
Owner 广东泰禾建设有限公司