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Industrial solid waste concrete for prefabricated member, preparation method and application thereof

A technology for industrial solid waste and prefabricated components, applied in solid waste management, sustainable waste treatment, climate sustainability, etc., can solve problems such as unfavorable industrial production, increase production costs, and poor economy, and alleviate supply shortages , the effect of alleviating environmental pressure and reducing production costs

Active Publication Date: 2021-02-02
BEIJING BUILDING MATERIALS ACADEMY OF SCI RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN 109437718 A provides a C40 grade solid waste concrete, the compound admixture content is 50%, and the reinforced recycled coarse aggregate is used to replace the coarse aggregate, but the recycled reinforced coarse aggregate used is potassium silicate reinforced recycled coarse aggregate, so the economy is not strong
CN111362631 A provides a kind of preparation method of all-solid waste cementitious material coagulation, but needs alkaline activator such as water glass and steam curing, therefore increases preparation cost, is unfavorable for industrialized production

Method used

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  • Industrial solid waste concrete for prefabricated member, preparation method and application thereof
  • Industrial solid waste concrete for prefabricated member, preparation method and application thereof
  • Industrial solid waste concrete for prefabricated member, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The multi-component and multi-scale industrial solid waste concrete for large-volume prefabricated components provided in this example, the concrete ratio design (cement, composite admixture, fine aggregate, coarse aggregate, admixture and water) is shown in Table 1. Then, the weighed components are prepared according to the above-mentioned adding sequence and preparation method to obtain fresh concrete.

[0036] An embodiment of the present invention provides a method for preparing multi-component and multi-scale industrial solid waste concrete for large-volume prefabricated (PC) components, including the following steps:

[0037] Step 1), weighing steel slag powder, fly ash, regenerated micropowder / stone powder and desulfurized gypsum according to the composition of the composite admixture, adding them to a mixing container and fully mixing to obtain a composite admixture;

[0038] Step 2), weigh the fine aggregate and coarse aggregate according to the proportioning c...

Embodiment 2-12

[0041] Adopt the same material and method of embodiment 1 to prepare fresh concrete, the difference is only that the following concrete proportions are different (see table 1).

[0042] Concrete proportioning in table 1 embodiment 1-12

[0043]

experiment example 1

[0045] In accordance with the test methods in GB / T 50080 "Standards for Test Methods of Performance of Ordinary Concrete Mixtures", GB / T 50081 "Standards for Test Methods of Mechanical Properties of Ordinary Concrete" and "Test Methods for Long-term Performance and Durability of Ordinary Concrete" GB / T 50082 Test the slump of freshly mixed concrete, the mechanical properties of hardened concrete, the resistance to chloride ion penetration and frost resistance, and the performance test results of the concrete in Examples 1-12 are shown in Table 2.

[0046] Table 2 embodiment 1-12 performance parameter

[0047]

[0048] According to the test results of Examples 1-12 of the present invention, the solid waste content in the concrete is ≥ 65%, the 28-day compressive strength is greater than 40MPa, and the 28-day electric flux is between 546 and 934C, meeting the index requirements of prefabricated structural concrete. Excellent mechanical properties and durability indicators. A...

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Abstract

The invention relates to industrial solid waste concrete for a prefabricated member, a preparation method and application thereof. The industrial solid waste concrete for the prefabricated member comprises the following raw materials in parts by weight: 220-280 parts of cement, 90-200 parts of a composite admixture, 740-790 parts of fine aggregate, 1070-1130 parts of coarse aggregate, 7.5-8 partsof an additive and 140-160 parts of water, wherein the composite admixture comprises fly ash, steel slag, regenerated powder and desulfurized gypsum in a weight ratio of (16-35):(5-10):(2-4):(0.5-1).According to the industrial solid waste concrete for the prefabricated member, on the premise that the using performance requirement of the concrete for the prefabricated member is met, large-mixing-amount multi-element multi-scale industrial solid waste is adopted, and the solid waste concrete for the prefabricated member, which is prepared in an economical, environment-friendly and industrial production mode, is developed.

Description

technical field [0001] The invention relates to the technical field of preparation of concrete prefabricated components, in particular to a solid waste concrete for prefabricated components and its preparation method and application. Background technique [0002] Concrete prefabricated components are processed and produced in a standardized manner in the factory to produce a variety of products, which are transported to the site for hoisting and splicing, which can realize the rapid and low-pollution construction of buildings. Therefore, the prefabricated concrete component-based prefabricated building method reflects the industrialization development trend and advanced level of modern architecture, and has also become an important way for modern architecture to achieve green and sustainable development. [0003] In the production and preparation of prefabricated PC (Precast concrete) components, realizing the resource utilization of metallurgical waste residue, mine tailing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B18/08C04B18/12C04B18/14C04B18/16
CPCC04B28/144C04B18/08C04B18/142C04B18/167C04B18/12C04B2201/50C04B14/068C04B2103/302C04B7/02Y02W30/91
Inventor 王肇嘉涂玉波王吉祥陈旭峰房桂明
Owner BEIJING BUILDING MATERIALS ACADEMY OF SCI RES
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