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Composite alkali-activated lithium slag low-temperature early-strength concrete and preparation method thereof

A technology of concrete and compound alkali, which is applied in the field of building materials, can solve the problems of reduced concrete section and reduced concrete strength, and achieve the effects of promoting early strength, improving early strength, and high grindability

Active Publication Date: 2022-04-15
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the air-entraining agent can improve the low temperature resistance of concrete, after adding the air-entraining agent to the concrete, many closed air bubbles will be formed in the concrete. The strength is reduced, which limits the use of concrete to a certain extent.

Method used

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  • Composite alkali-activated lithium slag low-temperature early-strength concrete and preparation method thereof
  • Composite alkali-activated lithium slag low-temperature early-strength concrete and preparation method thereof
  • Composite alkali-activated lithium slag low-temperature early-strength concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The method for preparing low-temperature early-strength concrete by compound alkali stimulating lithium slag comprises the following steps:

[0050] Step 1: Lithium slag, carbide slag are carried out dry grinding 15-30min respectively, obtain 20-25 μm lithium slag powder and carbide slag powder by sieving;

[0051] Step 2: Get 3.4 parts of lithium slag powder and 3.4 parts of water and mix them with wet milling for 60 minutes to obtain 6.8 parts of ultrafine lithium slag slurry;

[0052] Step 3: get 2 parts of calcium carbide slag powder, 4 parts of water and mix and then wet mill for 60 minutes to obtain 6 parts of nano carbide slag slurry;

[0053] Step 4: Take 6.8 parts of ultrafine lithium slag slurry, 6 parts of nano carbide slag slurry, 30.6 parts of cement, 0.3 part of calcium sulfate, 0.2 part of sodium citrate, 70 parts of river sand, and 96 parts of crushed slag obtained in steps 2 and 3. Stone, 10.6 parts of mixing water, 1.2 parts of water reducer, 0.3 part...

Embodiment 2

[0056] The method for preparing low-temperature early-strength concrete by compound alkali stimulating lithium slag comprises the following steps:

[0057] Step 1: Lithium slag, carbide slag are carried out dry grinding 15-30min respectively, obtain 20-25 μm lithium slag powder and carbide slag powder by sieving;

[0058] Step 2: Get 5.1 parts of lithium slag powder and 5.1 parts of water after mixing and wet mill for 60 minutes to obtain 10.2 parts of ultrafine lithium slag slurry;

[0059] Step 3: get 2 parts of calcium carbide slag powder, 4 parts of water and mix and then wet mill for 60 minutes to obtain 6 parts of nano carbide slag slurry;

[0060] Step 4: Take 10.2 parts of ultrafine lithium slag slurry, 6 parts of nano carbide slag slurry and 28.9 parts of cement, 0.3 part of calcium sulfate, 0.2 part of sodium citrate, 70 parts of river sand, and 96 parts of crushed slag obtained in steps 2 and 3. Stone, 8.9 parts of mixing water, 1.2 parts of water reducer, 0.3 part...

Embodiment 3

[0063] The method for preparing low-temperature early-strength concrete by compound alkali stimulating lithium slag comprises the following steps:

[0064] Step 1: Lithium slag, carbide slag are carried out dry grinding 15-30min respectively, obtain 20-25 μm lithium slag powder and carbide slag powder by sieving;

[0065] Step 2: Get 5.1 parts of lithium slag powder, 5.1 parts of water and mix them with wet grinding for 20 minutes to obtain 10.2 parts of ultrafine lithium slag slurry;

[0066] Step 3: get 2 parts of calcium carbide slag powder, 4 parts of water and mix and wet grind for 20 minutes to obtain 6 parts of nano carbide slag slurry;

[0067] Step 4: Take 10.2 parts of ultrafine lithium slag slurry, 6 parts of nano carbide slag slurry and 28.9 parts of cement, 0.3 part of calcium sulfate, 0.2 part of sodium citrate, 70 parts of river sand, and 96 parts of crushed slag obtained in steps 2 and 3. Stone, 8.9 parts of mixing water, 1.2 parts of water reducer, 0.3 parts ...

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Abstract

The invention provides composite alkali-activated lithium slag low-temperature early-strength concrete and a preparation method thereof, and the composite alkali-activated lithium slag low-temperature early-strength concrete comprises the following components in parts by weight: 2-14 parts of superfine lithium slag slurry, 3-9 parts of nano carbide slag slurry, 27-35 parts of cement, 2-4 parts of calcium sulfate, 0.1-0.2 part of sodium citrate, 65-75 parts of fine aggregate, 90-100 parts of coarse aggregate, 7-15 parts of water, 1.2 parts of a water reducing agent and 0.3 part of an anti-freezing agent. Solid waste is selected as a raw material for preparation, so that the environmental pressure can be relieved. The prepared concrete has good strength, impermeability and low temperature resistance. The concrete can be widely applied to buildings in low-temperature areas.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a composite alkali-activated lithium slag low-temperature early-strength concrete and a preparation method thereof. Background technique [0002] Xinjiang has a vast territory, and some areas have high altitude and low temperature, which restrict the construction period and the use of building materials. At present, mineral admixtures have become an indispensable part of concrete. Using mineral admixtures to replace part of cement can not only protect the environment but also reduce the production cost of cement. However, at present, the effect of traditional mineral admixtures in low-temperature curing concrete is not ideal. If the proportion of mineral admixtures is improperly selected, it may even have adverse effects, and most of the previous researches were carried out at room temperature, and the early-strength effect in low-temperature environments ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B22/10C04B22/06C04B22/14C04B24/06C04B111/20
CPCC04B28/04C04B22/10C04B22/06C04B22/064C04B22/143C04B24/06C04B2201/05C04B2201/50C04B2111/29C04B14/02C04B14/068C04B2103/302C04B24/122C04B24/04Y02W30/91
Inventor 王迎斌王佳菲刘威闻贺行洋苏英杨进何岩胡轶原振毅李阳
Owner HUBEI UNIV OF TECH
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