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Reverse design method, preparation method and application of recycled lightweight concrete

A technology of reverse design and lightweight concrete, which is applied in the field of construction technology and building materials, and can solve problems that affect the effective recycling and use of waste, unstable waste generation, and inapplicability

Inactive Publication Date: 2021-01-19
四川全元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

[0004] At present, the existing common concrete mix ratio design method is: first produce the raw materials and ensure a sufficient amount, most of the raw materials purchased in the market have relatively mature performance and stable supply, measure related indicators, and design the mix ratio according to the specifications. Products are produced according to the mix ratio, and the products are tested. This method can be used for ordinary concrete, but there are many types of waste materials used for recycled lightweight concrete, and the amount of waste generated is particularly unstable. Recycled lightweight concrete products have strict regulations. Due to the performance requirements, the mix ratio of recycled lightweight concrete has to be adjusted frequently. The adjustment of mix ratio design requires process and time, which seriously affects the continuous production efficiency of recycled lightweight concrete products, and also seriously affects the use of various types of waste in recycled lightweight concrete. The actual situation such as the effective recycling and use of concrete series products has become completely inapplicable

Method used

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  • Reverse design method, preparation method and application of recycled lightweight concrete
  • Reverse design method, preparation method and application of recycled lightweight concrete
  • Reverse design method, preparation method and application of recycled lightweight concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] The production specification is 200×200×100 (mm) small hollow blocks of recycled light concrete, the hollow rate is 27%, and the density level is ≤1400kg / m 3 , intensity level MU5.

[0095] (1) Waste sorting and recycling methods and main tests:

[0096] ①Recycle light waste to prepare recycled light materials:

[0097] Light wastes include agricultural solid light wastes (residues of orange stalks include roots, stems, leaves, husks: examples such as corn stalks and leaves, corn cobs, rice husks, etc.); forestry solid light wastes (wood Processing sawdust particles and plant residues and urban garden trimmings, etc.), commercial solid light waste (foam, rubber, polymers, construction light solid waste ( Waste wood templates, waste plastic templates, waste ceramsite / water slag / polystyrene particles / foaming waste boards), and industrial solid light waste (distiller's grains, vinegar grains, etc.).

[0098] Recycling method: Separate one or more of the above-mentioned ...

Embodiment 2

[0208] In this example, waste drilling mud that is difficult to handle, bottom ash and fly ash produced by domestic waste incineration, vinegar grains, distiller's grains, etc. are used as raw materials in combination with other wastes, and the ratio design method and preparation method of Example 1 are used. Produce a variety of recycled lightweight concrete products.

[0209] The specific treatment plan for the selected raw materials: ① The pH value of the waste drilling mud is about 10, and the pH value of the vinegar residue is about 5. The pH value of the mixture after matching according to the following volume ratio is ≥ 6, which meets the concrete curing requirements; Density 2204kg / m 3 , with domestic waste incineration fly ash low apparent density 562kg / m 3 , the following mix ratios meet the limit requirements for controlling the apparent density in this product; ③The following mix ratios and mix ratios use the adsorption properties of recycled aggregates and light ...

Embodiment 3

[0222] Use the recycled raw materials prepared in Example 2 and other raw materials to produce recycled all-light concrete strips for building partition walls: the specification is 2800×600×100 mm.

[0223] (1) Prepare raw materials and test indicators, determine the benchmark mix ratio as required, and convert it into a production mix ratio.

[0224] (2) The basic formula of recycled all-light concrete slabs:

[0225] Table 5 Benchmark formula of recycled all-light concrete slabs

[0226]

[0227] In the table, the water consumption considers the water absorption rate of recycled aggregate and recycled light material; recycled aggregate and recycled light material do not contain powder; raw materials are dry materials. The composition of the recycled raw materials used in the corresponding benchmark formula is shown above.

[0228] (3) Use conventional concrete mixing equipment to make recycled all-light concrete according to the 3-stage feeding continuous mixing method,...

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Abstract

The invention provides a recycled lightweight concrete reverse design method, a preparation method and an application thereof, the reverse design method comprises the following steps: (1) determiningthree component technical indexes of recycled aggregate, recycled light material and recycled powder; (2) obtaining the reference mixing ratio of the recycled lightweight concrete recycled aggregate,the recycled light material and the recycled powder; (3) obtaining the processing volume matching ratio of the regenerated raw materials according to the properties of the three components and the controlled apparent density; and (4) converting the reference mix proportion into a production mix proportion. According to the method, when the regeneration raw materials are replaced or the indexes arechanged, only the processing matching ratio of the regeneration raw materials forming the three components needs to be adjusted, the percent of pass of product performance indexes is increased, stable production is ensured, sufficient reutilization of regeneration resources is achieved, and the application range is wide.

Description

technical field [0001] The invention belongs to the field of building technology and building materials, and in particular relates to a reverse design method, preparation method and application of recycled lightweight concrete. Background technique [0002] With the acceleration of social development and economic construction, the discharge of various wastes is increasing, the types of discharge are increasing, and the discharge is increasing. Common solid wastes include agricultural solid waste ( Orange stalks, shells and plant residues, etc.), forestry solid waste (wood processing sawdust particles and plant residues, and urban garden pruning, etc.), industrial solid waste (waste ore, solidified residues of industrial processing, residues after sewage treatment, bottom ash and fly ash residues after domestic waste incineration, oil and gas mining waste well mud, etc.), construction solid waste (waste concrete blocks, waste wall materials, waste tiles, residues from sand an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G16C60/00
CPCG16C60/00
Inventor 龙凤全吕杉龙云王亚彬巫仕斌
Owner 四川全元新材料科技有限公司
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