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Low-shrinkage sludge ceramsite alkali-activated full-slag foam concrete plate and preparation method thereof

A technology of foam concrete and sludge ceramsite, which is applied in the field of building materials, can solve the problems of reducing strength, reducing the thermal conductivity of foam concrete, and increasing the porosity of products, so as to ensure the compressive strength, help protect the environment, and reduce engineering costs. Effect

Active Publication Date: 2014-12-24
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the polyacrylic acid sodium salt SAP is completely released, it will leave a large number of capillary pores in the foamed concrete, increase the porosity of the product, reduce the thermal conductivity of the foamed concrete, and also slightly reduce the strength

Method used

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  • Low-shrinkage sludge ceramsite alkali-activated full-slag foam concrete plate and preparation method thereof
  • Low-shrinkage sludge ceramsite alkali-activated full-slag foam concrete plate and preparation method thereof
  • Low-shrinkage sludge ceramsite alkali-activated full-slag foam concrete plate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A low-shrinkage sludge ceramsite alkali-activated all-slag foam concrete slab, the contents of each component are shown in Table 1.

[0039] The raw material mixing ratio (kg / m3) of table 1 embodiment 1

[0040]

[0041] Weigh the raw materials according to the ratio of raw materials in Table 1 (among them, the amount of superplasticizer is 2.1% of the total mass of slag, silica fume and fly ash), soak the ceramsite in pre-wet for 24 hours and then lose water freely for 4-5 hours , and mix the ceramsite in the ceramsite heap evenly 1 hour before mixing, and measure its moisture content to be about 12%; absorb water of polyacrylic acid sodium salt SAP 150-200 times; mix slag, silicon powder, fly ash and The polypropylene fiber is dry mixed for 30-60s, so that the slag, silicon powder and fly ash as the cementing material are fully mixed with the fiber agent, and the water, water reducer, water Mix the glass, pre-wetted ceramsite (that is, ceramsite that has been satu...

Embodiment 2

[0043] A low-shrinkage sludge ceramsite alkali-activated all-slag foam concrete slab, the contents of each component are shown in Table 2.

[0044] The raw material ratio (kg / m) of table 2 embodiment 2 3 )

[0045]

[0046] Weigh the raw materials according to the ratio of raw materials in Table 2 (among them, the amount of superplasticizer is 2.1% of the total mass of slag, silica fume and fly ash), soak the ceramsite in pre-wet for 24 hours, and then lose water freely for 4-5 hours , and mix the ceramsite in the ceramsite heap evenly 1 hour before mixing, and measure its moisture content to be about 12%; absorb water of polyacrylic acid sodium salt SAP 150-200 times; mix slag, silicon powder, fly ash and The polypropylene fiber is dry-mixed for 30-60s, so that the slag, silica fume and fly ash as the cementitious material are fully mixed with the fiber agent, and then water, water reducer, water reducing agent, Water glass, pre-wetted ceramsite (that is, ceramsite that ...

Embodiment 3

[0048] A low-shrinkage sludge ceramsite alkali-activated all-slag foam concrete slab, the contents of each component are shown in Table 3.

[0049] The raw material ratio (kg / m) of table 3 embodiment 3 3 )

[0050]

[0051] Weigh the raw materials according to the ratio of raw materials in Table 3 (among them, the amount of superplasticizer is 2.1% of the total mass of slag, silica fume and fly ash), pre-wet the ceramsite for 24 hours and then freely lose water for 4-5 hours , and mix the ceramsite in the ceramsite heap evenly 1 hour before mixing, and measure its moisture content to be about 12%; absorb water of polyacrylic acid sodium salt SAP 150-200 times; mix slag, silicon powder, fly ash and The polypropylene fiber is dry mixed for 30-60s, so that the slag, silicon powder and fly ash as the cementitious material are fully mixed with the fiber agent, and then water is added (deducting the water absorbed by the sludge ultra-light ceramsite and polyacrylic acid sodium s...

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Abstract

The invention discloses a low-shrinkage sludge ceramsite alkali-activated full-slag foam concrete plate and a preparation method thereof. The foam concrete plate is prepared from slag, silica fume, pulverized fuel ash, fibers, ceramsite, sodium polyacrylate SAP, water, a foaming agent, alkali activator and a water reducing agent. According to the method, cement is completely replaced by slag to prepare foam concrete, the shrinkage performance and heat conductivity coefficient of the foam concrete material can be reduced by doping ceramsite and sodium polyacrylate SAP, and the tensile strength of the foam concrete material can be guaranteed by utilizing an alkali-activated slag system and ceramsite. The prepared foam concrete plate has excellent mechanical performance and low-shrinkage self-insulation performance and is capable of solving the problems that a traditional autoclaved aerated concrete material needs high-temperature steaming and a prefabricated part made from the traditional autoclaved aerated concrete material easily cracks; in addition, the invention effectively realizes recycling of slag and other industrial wastes, saves energy, protects the environment and therefore has an important application value in the field of heat insulation of walls and the like.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a low-shrinkage sludge ceramsite alkali-activated all-slag foam concrete panel and a preparation method thereof. Background technique [0002] The traditional autoclaved aerated concrete block is a lightweight porous wall material. Due to its light weight, large volume, and internal hole structure, it has good sound insulation and thermal insulation functions, and is a widely used thermal insulation wall. Material. The autoclaved aerated concrete block is prepared by the chemical reaction of the air-generating agent to form pores, and is prepared by pouring molding, pre-curing cutting, autoclaving curing and other processes. The autoclaved aerated concrete block has the problem of high energy consumption, and the amount of cement in the concrete is high, so the prepared prefabricated components are prone to cracking. In addition, the autoclaved aerated concrete blo...

Claims

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Application Information

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IPC IPC(8): C04B28/08C04B38/10C04B14/04C04B24/26
Inventor 丁庆军胡曙光黄修林蔡晓娟黄辉丁晓歆
Owner WUHAN UNIV OF TECH
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