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Durable foam concrete and preparation method thereof

A foam concrete and durable technology, which is applied in the field of building materials, can solve the problems of product service life impact, foam structure instability, product performance deterioration, etc., and achieve the effects of prolonging service life, avoiding collapse failure, and strengthening foaming effect

Active Publication Date: 2020-01-10
江苏鸿宇天盛新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem mainly solved by the present invention is: in the process of preparation and use of traditional foam concrete, the foam structure is unstable and prone to collapse, and with the continuous invasion of moisture and carbon dioxide in the external environment, the product performance is further deteriorated, making the product The shortcoming that the service life is seriously affected provides a kind of durable foam concrete and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0045] Acid-treated sepiolite:

[0046] Put sepiolite and hydrochloric acid with a mass fraction of 1% into a hydrothermal kettle at a mass ratio of 1:20, and at a temperature of 160°C and a pressure of 1.8MPa, after hydrothermal reaction for 3 hours, filter, collect the filter cake, and use Wash the filter cake with deionized water until the washing liquid is neutral, then transfer the washed filter cake to an oven, and dry it to constant weight at a temperature of 105°C, then transfer the dried filter cake to a muffle furnace , at a temperature of 180°C, heat-preserve and roast for 1 hour to obtain acid-treated sepiolite;

[0047] Carbonized rice husk fiber:

[0048] Mix rice husk and water at a mass ratio of 1:10 and soak for 3 hours, take out the rice husk, freeze it at -20°C for 1 hour, and press it at a pressure of 10 MPa to obtain pressed material, and then press the material Transfer to a tube furnace, under the protection of argon, carbonize at 600°C for 3 hours, th...

example 2

[0053] Acid-treated sepiolite:

[0054] Put sepiolite and hydrochloric acid with a mass fraction of 5% into a hydrothermal kettle at a mass ratio of 1:30, and under the conditions of a temperature of 170°C and a pressure of 2.2MPa, after hydrothermal reaction for 4 hours, filter, collect the filter cake, and use Wash the filter cake with deionized water until the washing liquid is neutral, then transfer the washed filter cake to an oven, and dry it to a constant weight at a temperature of 108°C, then transfer the dried filter cake to a muffle furnace , at a temperature of 190°C, heat-preserve and roast for 1.5 hours to obtain acid-treated sepiolite;

[0055] Carbonized rice husk fiber:

[0056] Mix rice husk and water at a mass ratio of 1:15 and soak for 4 hours, take out the rice husk, freeze it at -30°C for 1.5 hours, and press it at a pressure of 15 MPa to obtain pressed material, and then press The material is transferred into a tube furnace, and under the protection of ...

example 3

[0061] Acid-treated sepiolite:

[0062] Put sepiolite and hydrochloric acid with a mass fraction of 10% into a hydrothermal kettle at a mass ratio of 1:50, and under the conditions of a temperature of 180°C and a pressure of 2.6MPa, after hydrothermal reaction for 5 hours, filter, collect the filter cake, and use Wash the filter cake with deionized water until the washing liquid is neutral, then transfer the washed filter cake to an oven, and dry it to constant weight at a temperature of 110°C, then transfer the dried filter cake to a muffle furnace , at a temperature of 200°C, heat-preserve and roast for 2 hours to obtain acid-treated sepiolite;

[0063] Carbonized rice husk fiber:

[0064] Mix rice husk and water at a mass ratio of 1:20 and soak for 6 hours, take out the rice husk, freeze it at -50°C for 2 hours, and press it at a pressure of 20 MPa to obtain pressed material, and then press the material Transfer to a tube furnace, under the protection of argon, carbonize ...

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Abstract

The invention discloses a durable foam concrete and a preparation method thereof, and belongs to the technical field of building materials. The preparation method comprises the following steps: weighing raw materials, and equally dividing water in the raw materials into three parts; mixing cement, carbonized rice hull fibers, microcrystalline cellulose, mirabilite and 2 / 3 of water, and carrying out high-viscosity kneading for 45-60 min to obtain a kneaded material; heating the kneaded material to 55-75 DEG C, adding a foaming agent, a foam stabilizer and the remaining 1 / 3 of water, performingstirring and mixing, injecting the obtained mixture into a mold, standing the mixture for foaming, and performing curing and demolding to obtain a green body; and adding the green body and silicate ester into a reaction kettle, sealing the reaction kettle, pressurizing the reaction kettle to 0.3-0.5 MPa, heating the reaction kettle to 85-95 DEG C, carrying out a heat preservation reaction, and discharging the obtained reaction product to obtain the durable foam concrete. The product obtained in the invention has good mechanical properties, and the foam strength of the product also has good tolerance to water and temperature.

Description

technical field [0001] The invention discloses a durable foam concrete and a preparation method thereof, belonging to the technical field of building materials. Background technique [0002] Foam concrete is mainly composed of calcareous materials (cement, lime) and siliceous materials (quartz sand, granulated blast furnace slag, fly ash, shale, etc.) , gas, cut porous ultra-light material. [0003] Cement is the main cementitious material in foam concrete, and it is also the main source of strength of foam concrete, which plays a cementing role in foam concrete. Generally speaking, the higher the strength grade of the cement used, the higher the compressive strength of the prepared foam concrete will be. There are many types of cement for preparing foamed concrete. Ordinary Portland cement, slag Portland cement, and fly ash Portland cement can all be used to make foamed concrete. [0004] Foaming agent is an indispensable component for making foam concrete, and the quali...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/10C04B28/04
CPCC04B28/04C04B2111/40C04B2201/50C04B2201/52C04B20/023C04B14/386C04B2103/50C04B2103/42C04B24/383C04B22/147C04B24/40C04B14/042C04B38/10Y02W30/91
Inventor 张国浩
Owner 江苏鸿宇天盛新材料科技有限公司
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