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Concrete for high-strength PC component and preparation method of concrete

A concrete and high-strength technology, applied in the field of concrete and its preparation of high-strength PC components, can solve the difficulty of ensuring the mechanical properties and durability of concrete, the impact of water-reducing agent dispersion and dispersion retention, and increase the difficulty of preparation and production costs To achieve good water permeability and chemical stability, prolong dispersion and action time, simple and reasonable formula

Inactive Publication Date: 2021-04-02
浙江波威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

The composition of the water reducer in this patent is complex, which not only increases the difficulty of preparation and production cost, but also affects the dispersion and dispersion retention of the water reducer, making it difficult to guarantee the mechanical properties and durability of concrete.
It can be seen that the existing retarding superplasticizers are still difficult to meet the requirements of delaying the setting time of concrete and increasing the strength, and further exploration of improved technical solutions is still needed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1 provides a kind of concrete for high-strength PC components, including the following components in parts by weight: 300 parts of cement, 60 parts of fly ash, 580 parts of quartz sand, 1000 parts of gravel, 80 parts of mineral powder, water 150 parts, 10 parts of steel fiber, 8 parts of retarding superplasticizer, 5 parts of composite expansion agent, and 3 parts of synergist; among them, the fineness modulus of quartz sand is 2.2, and the particle size of crushed stone is 3-5mm , The steel fibers include rectangular, zigzag, meniscus, and wave sections, the aspect ratio is 85-100, and the composite expansion agent is UEA concrete expansion agent.

[0033] Among them, the retarding water reducer is prepared by the following method: first mix 40 parts of ether polycarboxylate water reducer, 15 parts of aromatic polyamide fiber, and 13 parts of lignosulfonate in proportion, and then add 25 parts of water 1 part, 6 parts of retarder, 1 part of initiator, ultras...

Embodiment 2

[0035] Embodiment 2 provides a kind of concrete for high-strength PC components, including the following components in parts by weight: 300 parts of cement, 70 parts of fly ash, 560 parts of quartz sand, 950 parts of gravel, 80 parts of mineral powder, water 180 parts, 10 parts of steel fiber, 8 parts of retarding superplasticizer, 5 parts of composite expansion agent, and 3 parts of synergist; the retarding superplasticizer, quartz sand, steel fiber, crushed stone, and composite expansion agent used are all mixed with Example 1 is the same.

Embodiment 3

[0037] Embodiment 3 provides a kind of concrete that is used for high-strength PC member, comprises the component of following parts by weight: 350 parts of cement, 60 parts of fly ash, 550 parts of quartz sand, 920 parts of gravel, 80 parts of mineral powder, water 180 parts, 9 parts of steel fiber, 8 parts of retarding superplasticizer, 3 parts of composite expansion agent, and 3 parts of synergist; among them, the retarding superplasticizer, quartz sand, steel fiber, gravel and composite expansion agent used are UEA Concrete expansion agent is all identical with embodiment 1.

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PUM

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Abstract

The invention belongs to the technical field of concrete building materials, and particularly relates to concrete for a high-strength PC component and a preparation method of the concrete. The concrete is prepared from the following raw materials in parts by weight: 250-360 parts of cement, 50-100 parts of coal ash, 500-650 parts of quartz sand, 900-1100 parts of gravel, 60-90 parts of mineral powder, 150-180 parts of water, 9-15 parts of steel fibers, 6-9 parts of a retarding water reducing agent, 3-8 parts of a composite expanding agent and 2-5 parts of a synergist. The retarding water reducing agent comprises the following components in parts by weight: 30-50 parts of an ether polycarboxylic acid water reducing agent, 10-20 parts of aromatic polyamide fiber, 9-15 parts of lignosulfonate, 3-8 parts of a retarder, 0.5-1.5 parts of an initiator and 20-35 parts of water. By compounding the retarding water reducing agent with concrete, the setting time of the concrete is effectively delayed, the strength is improved, and the comprehensive durability of the concrete is favorably improved.

Description

technical field [0001] The invention belongs to the technical field of concrete building materials, and in particular relates to concrete for high-strength PC components and a preparation method thereof. Background technique [0002] Prefabricated concrete (PC) components are widely used in construction, transportation, water conservancy and other fields, and play an important role in national infrastructure construction. Concrete pouring is one of the important links in the production of PC components. At present, almost all housing construction projects and municipal projects use ready-mixed concrete. Ready-mixed concrete is usually mixed with cement, aggregate, admixture and water in a predetermined proportion at the mixing station and then transported to the construction site. Although the mixing of concrete is more uniform than that of the early manual on-site mixing, the proportion of material doping is relatively accurate. However, with the multi-functionalization of...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B24/24C04B16/06C04B103/22C04B103/30
CPCC04B28/00C04B40/0046C04B16/0691C04B2103/22C04B2103/302C04B2201/50C04B18/08C04B14/06C04B18/12C04B18/04C04B14/48C04B2103/0068C04B24/24C04B24/18C04B22/12C04B22/142C04B22/10C04B22/085C04B22/147
Inventor 盛雷军王有路黄国阳刘铨魏玲玲
Owner 浙江波威新材料科技有限公司