A kind of high-volume pozzolan foam concrete material and preparation method thereof

A technology of foam concrete and volcanic ash, applied in the field of foamed concrete, can solve the problems of low utilization rate of volcanic ash, achieve good mechanical properties, good thermal insulation performance, and reduce natural damage

Active Publication Date: 2022-03-29
SUZHOU CONCRETE CEMENT PROD RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the utilization rate of volcanic ash in this application is relatively low, about 50%. The average compressive strength of 600-grade samples is 4.5MPa, and the minimum value is 3.5MPa.

Method used

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  • A kind of high-volume pozzolan foam concrete material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] A large volume of pozzolan foamed concrete material, prepared according to the amount of the following raw materials:

[0060] P·O 42.5 Ordinary Portland cement: 180g, pozzolan (specific surface area is 1500m 2 / kg): 420g, polycarboxylate superplasticizer: 3g, hydroxypropyl methylcellulose ether: 0.3g, lithium carbonate: 9g, polypropylene fiber: 3g, styrene-acrylic emulsion: 6g, hydrogen peroxide: 24g, water : 180g, the water temperature is 30°C.

[0061] The preparation method of large-volume pozzolan foam concrete material comprises the following steps:

[0062] a) Slurry preparation: measure cement, volcanic ash, water, water reducer, foam stabilizer, organic fiber, and water repellent in proportion and add them to the mixer at a stirring speed of 800 rpm for 4 minutes to make a slurry;

[0063] b) adding early strength agent: add metered early strength agent to the slurry obtained in step a), and stir at a stirring speed of 1500rpm for 60s to make a slurry containi...

Embodiment 2

[0070] A large volume of pozzolan foamed concrete material, prepared according to the amount of the following raw materials:

[0071] P·Ⅱ52.5 Portland cement: 210g, pozzolan (specific surface area is 1500m 2 / kg): 490g, naphthalene-based water reducer: 7g, calcium stearate: 2.8g, lithium carbonate: 7g, polyamide fiber: 10.5g, silicone: 2.1g, hydrogen peroxide: 22.4g, water: 280g, water The temperature is 30°C.

[0072] The preparation method of large-volume pozzolan foam concrete material comprises the following steps:

[0073] a) Slurry preparation: measure cement, volcanic ash, water, water reducer, foam stabilizer, organic fiber, and water repellent in proportion and add them to the mixer at a stirring speed of 1000 rpm for 3 minutes to make a slurry;

[0074] b) adding early strength agent: adding metered early strength agent to the slurry obtained in step a), and stirring at a stirring speed of 1800rpm for 50s to make a slurry containing early strength agent;

[0075] ...

Embodiment 3

[0081] A large volume of pozzolan foamed concrete material, prepared according to the amount of the following raw materials:

[0082] P·Ⅱ52.5 Portland cement: 210g, pozzolan (specific surface area is 2000m 2 / kg): 490g, polycarboxylate superplasticizer: 2.1g, hydroxypropyl methylcellulose ether: 1.4g, aluminum sulfate: 14g, polypropylene fiber: 7g, styrene-acrylic emulsion: 5.6g, hydrogen peroxide: 17.5 g, water: 210g, water temperature is 40 ℃.

[0083] The preparation method of large-volume pozzolan foam concrete material comprises the following steps:

[0084] a) Slurry preparation: measure cement, volcanic ash, water, water reducer, foam stabilizer, organic fiber, and water repellent in proportion and add them to the mixer at a stirring speed of 1500 rpm for 2 minutes to make a slurry;

[0085] b) adding early strength agent: add metered early strength agent to the slurry obtained in step a), and stir at a stirring speed of 2000rpm for 30s to make a slurry containing ear...

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Abstract

The invention relates to a foamed concrete material with a large amount of volcanic ash and a preparation method thereof. The concrete material is prepared from the following raw materials in parts by mass: cement: 30 parts, volcanic ash: 70 parts, water reducing agent: 0.1-1.0 parts, Foam stabilizer: 0.05-1.0 parts, early strength agent: 1.0-8.0 parts, organic fiber: 0.1-1.5 parts, water-repellent agent: 0.1-1.0 parts, foaming agent: 1.0-4.0 parts, water: 30-70 parts . The dry apparent density of the large-volume pozzolan foamed concrete material of the present invention is 550-800kg / m 3 , compressive strength 3‑8MPa, thermal conductivity 0.10‑0.18W / m K, volume water absorption 4~8%, with high strength, light weight, heat insulation, heat preservation, non-combustible and other characteristics, can be used to prepare wall self-insulation masonry Blocks, integrated prefabricated building core materials, partition walls, etc.

Description

technical field [0001] The invention relates to the technical field of foamed concrete, in particular to a large-volcanic ash foamed concrete material and a preparation method thereof. Background technique [0002] In recent years, the country has vigorously advocated the development of environmentally friendly buildings and circular economy, and the greening of building materials will also be an important development direction for a long time in the future. Foam concrete is a new type of lightweight thermal insulation material containing a large number of closed pores formed by introducing air bubbles into the cementitious material slurry through physical or chemical methods, after pouring, molding and natural maintenance. Thermal, sound insulation, good seismic performance and many other advantages, occupy an important position in the development of new energy-saving wall and roof heat preservation, heat insulation technology and materials. [0003] Pozzolana is a glassy ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B38/02
CPCC04B28/04C04B2201/20C04B2201/50C04B2201/32C04B7/12C04B24/24C04B24/383C04B22/10C04B16/0633C04B24/2676C04B22/068C04B38/02C04B2103/302C04B24/085C04B16/0691C04B24/42C04B22/148
Inventor 史星祥张磊蕾李龙梓王武祥满丽莹田寅谢一飞
Owner SUZHOU CONCRETE CEMENT PROD RES INST
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