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Binder for preparing road base material from brick-concrete construction waste and its application

A technology for construction waste and road base, applied in the field of cementitious materials, can solve problems such as affecting technology promotion, increasing the risk of cracks in the road base, increasing costs, etc., achieving broad application prospects, wide and easily available raw material sources, and offsetting aggregate drying shrinkage Effect

Active Publication Date: 2016-08-10
HUNAN YUNZHONG REGENERATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the brick-concrete recycled aggregate has developed cracks and micropores, strong water absorption, and serious drying shrinkage. When Portland cement, which also has shrinkage, is used as the cementing material, this will greatly increase the risk of cracks in the road base
If Portland cement is modified to make it suitable for cementing recycled aggregates, it will greatly increase the cost and affect the promotion of technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A cementitious material for preparing road base materials from brick-concrete construction waste, the cementitious material is mainly composed of the following components in parts by mass uniformly mixed:

[0022] 61 parts of slag,

[0023] 10 parts of natural gypsum,

[0024] Quicklime 20 parts,

[0025] 7 parts of fly ash and

[0026] Sodium sulfate 2 parts.

[0027] Among the above-mentioned cementing materials, the slag is water-quenched slag produced by blast furnace ironmaking slag. The above-mentioned slag, gypsum, lime, fly ash and sodium sulfate are particles that are fully dried and ground to the fineness of common cement.

[0028] The above-mentioned cementing material is specifically applied to the preparation and production of road base materials, and the brick-concrete recycled aggregate and the above-mentioned cementing material of this embodiment are used as basic raw materials to mix and prepare road base materials. The brick-concrete recycled aggr...

Embodiment 2

[0034] A cementitious material for preparing road base materials from brick-concrete construction waste, the cementitious material is mainly composed of the following components in parts by mass uniformly mixed:

[0035] 50 parts of slag,

[0036] 10 parts of natural gypsum,

[0037]15 parts slaked lime,

[0038] 25 parts of fly ash.

[0039] Among the above-mentioned cementing materials, the slag is water-quenched slag produced by blast furnace ironmaking slag. The above-mentioned slag, gypsum, lime and fly ash are particles that are fully dried and ground to the fineness of common cement.

[0040] The above-mentioned cementing material in this embodiment is specifically applied to the production of road base materials. Except that the raw material formula of the cementing material in the preparation method corresponds to the above-mentioned formula, the remaining raw material selection, operation steps, specific experimental conditions and process parameters, etc. are all...

Embodiment 3

[0042] A cementitious material for preparing road base materials from brick-concrete construction waste, the cementitious material is mainly composed of the following components in parts by mass uniformly mixed:

[0043] 55 parts of slag,

[0044] 15 parts of desulfurized gypsum,

[0045] 15 parts slaked lime,

[0046] fly ash 12 parts and

[0047] Sodium sulfate 3 parts.

[0048] Among the above-mentioned cementing materials, the slag is water-quenched slag produced by blast furnace ironmaking slag. The above-mentioned slag, gypsum, lime, fly ash and sodium sulfate are particles that are fully dried and ground to the fineness of common cement.

[0049] The above-mentioned cementing material in this embodiment is specifically applied to the production of road base materials. Except that the raw material formula of the cementing material in the preparation method corresponds to the above-mentioned formula, the remaining raw material selection, operation steps, specific expe...

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Abstract

The invention discloses a cementing material for preparing a road base material through using brick and concrete building wastes. The cementing material is obtained through uniformly mixing 50-70 parts by mass of slag, 10-30 parts by mass of gypsum, 5-20 parts by mass of lime, 5-25 parts by mass of fly ash and 0-5 parts by mass of sodium sulfate. When the cementing material is applied, regenerated brick and concrete aggregates and the cementing material, or industrial slag, a mine tailing material and the cementing material are used as basic raw materials, and are mixed to prepare the road base material. The advantages comprising environmental protection, waste utilization, cheapness, economy and the like are possessed in the invention.

Description

technical field [0001] The invention belongs to the field of construction engineering materials and their applications, in particular to a cementing material in road base materials and its specific applications. Background technique [0002] With the rapid advancement of urbanization in our country, a large amount of construction waste is produced, which not only occupies cultivated land, but also pollutes the environment. Effectively disposing of construction waste and turning waste into treasure has become an important task in building a "beautiful China". Construction waste can be divided into concrete waste and brick-concrete waste according to its main active components. The former is being promoted as an aggregate for recycled concrete; the latter has not been effectively reused in other fields except for backfill and production of building blocks. The rapid development of my country's road construction is rare in the world, and road construction has a huge demand fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/153C04B28/08
CPCY02P40/10
Inventor 彭美勋王正红李伯平董维君邹斌
Owner HUNAN YUNZHONG REGENERATION TECH CO LTD
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