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A kind of prefabricated component concrete and curing method thereof

A prefabricated component and concrete technology, applied in the field of concrete, can solve the problems of late strength and durability of concrete, sensitivity to soil, sensitivity to dosage, etc., and achieve the effect of ensuring uniformity and compactness, stable strength of concrete, and excellent early strength

Active Publication Date: 2022-04-08
GUANGDONG REDWALL NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, inorganic salt early-strength agents have an impact on the later strength and durability of concrete. Organic early-strength agents are sensitive to the dosage, and the later-stage strength of concrete decreases. Polycarboxylate early-strength agents are sensitive to soil, etc.

Method used

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  • A kind of prefabricated component concrete and curing method thereof
  • A kind of prefabricated component concrete and curing method thereof
  • A kind of prefabricated component concrete and curing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] An embodiment of the prefabricated component concrete of the present invention, in the prefabricated component concrete described in the present embodiment, the mass percentage of the crystal nucleus early strength type composite admixture is 1% of the total mass of cement, fly ash and mineral powder 0.9%; the prefabricated component concrete also contains cement, fly ash, water, mineral powder, sand and gravel, and the mass ratio of the cement, fly ash, water, mineral powder, sand and gravel is cement: pulverized coal Ash: water: mineral powder: sand: gravel = 280: 80: 145: 750: 1080;

[0036] Wherein, the crystal nucleus early-strength type composite admixture includes the following ingredients in parts by weight: 30 parts of cement nano-suspension concrete early-strength agent, 20 parts of early-strength polycarboxylate superplasticizer, viscosity-reducing and shrinkage-reducing polycarboxylate 20 parts of water-reducing agent and 30 parts of water-reducing and slump...

Embodiment 2

[0047] An embodiment of the prefabricated component concrete of the present invention, in the prefabricated component concrete described in the present embodiment, the mass percentage of the crystal nucleus early strength type composite admixture is 1% of the total mass of cement, fly ash and mineral powder 1.4%; the prefabricated component concrete also contains cement, fly ash, water, mineral powder, sand and gravel, and the mass ratio of the cement, fly ash, water, mineral powder, sand and gravel is cement: pulverized coal Ash: water: mineral powder: sand: gravel = 320: 110: 160: 780: 1160;

[0048] Wherein, the crystal nucleus early-strength type composite admixture includes the following ingredients in parts by weight: 60 parts of cement nano-suspension concrete early-strength agent, 20 parts of early-strength polycarboxylate superplasticizer, viscosity-reducing and shrinkage-reducing polycarboxylate 10 parts of water-reducing agent and 20 parts of water-reducing and slum...

Embodiment 3

[0059] An embodiment of the prefabricated component concrete of the present invention, in the prefabricated component concrete described in the present embodiment, the mass percentage of the crystal nucleus early strength type composite admixture is 1% of the total mass of cement, fly ash and mineral powder 1.25%; the prefabricated component concrete also contains cement, fly ash, water, mineral powder, sand and gravel, and the mass ratio of the cement, fly ash, water, mineral powder, sand and gravel is cement: pulverized coal Ash: water: mineral powder: sand: gravel = 295: 85: 148: 760: 1095;

[0060] Wherein, the crystal nucleus early-strength type composite admixture includes the following components by weight: 45 parts of cement nano-suspension concrete early-strength agent, 25 parts of early-strength polycarboxylate superplasticizer, viscosity-reducing and shrinkage-reducing polycarboxylate 15 parts of water-reducing agent and 25 parts of water-reducing and slump-preservi...

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Abstract

The invention discloses a prefabricated component concrete, which comprises a crystal nucleus early-strength type composite admixture, and comprises the following components in parts by weight: 30-60 parts of cement nano-suspension concrete early-strength agent, 20 parts of early-strength polycarboxylate water reducer ~30 parts, 10-20 parts of viscosity-reducing and shrinkage-reducing polycarboxylate superplasticizer, and 20-30 parts of water-reducing and slump-retaining polycarboxylate superplasticizer. The composite crystal nucleus early strength agent used in the present invention has excellent early strength, viscosity reduction, shrinkage reduction, and slump protection functions, ensures the workability and slump of concrete during the distribution period (usually 30-50min), and is easy to distribute Construction, to ensure the uniformity and compactness of concrete, improve the concrete compressive strength and durability, reduce concrete shrinkage and cracking, under natural curing conditions, the 6-8h compressive strength is higher than the tacit degree of demolition, and can realize prefabricated components without steam curing It is an excellent admixture very suitable for the production of concrete prefabricated components.

Description

technical field [0001] The invention relates to concrete, in particular to a prefabricated component concrete and a maintenance method thereof. Background technique [0002] For prefabricated concrete, the most important thing is that the concrete can quickly reach the strength of formwork removal, shorten the time of formwork removal, and increase the turnover rate of molds. To improve the early strength of concrete, there are usually: 1. Add early strength agents, inorganic salt early strength agents, such as calcium chloride, calcium nitrate, sulfate, etc.; organic early strength agents, such as triethanolamine, triisoethanolamine, etc.; polycarboxylates Acid accelerator. 2. Add nucleating agents to concrete, such as nano-calcium silicate hydrate, nano-silica and other suspension early-strength admixtures. 3. Improve cement fineness, increase surface area, increase cement hydration speed, and increase early strength. However, inorganic salt early strength agents have a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B24/26B28B11/24C04B111/20C04B103/10
CPCC04B28/00C04B40/0039B28B11/245C04B2111/20C04B2201/50C04B2103/10C04B18/08C04B14/06C04B14/02C04B18/141C04B2103/302C04B22/08C04B2103/408C04B24/2652
Inventor 张小富白淑英赵利华
Owner GUANGDONG REDWALL NEW MATERIALS