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A kind of mixed enhanced bonded gypsum and its preparation method

A bonding gypsum, enhanced technology, applied in the field of comprehensive utilization of industrial solid waste and chemical building materials, can solve the problems of poor bonding force and water retention, short setting time, waste of materials, etc., and achieve good bonding strength The effect of compressive strength, simple configuration process, and reduced production cost

Active Publication Date: 2017-01-04
上海贝恒人居建设集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a long time, people have used glue to mix gypsum powder as a binder, but this binder will release various harmful substances such as formaldehyde, benzene, toluene, etc. during construction and use. And water retention performance is poor, the setting time is short, not only difficult to operate during construction, waste materials, but also lead to masonry cracks in the use of gypsum building materials products, decorative layer hollowing and falling off, etc.

Method used

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  • A kind of mixed enhanced bonded gypsum and its preparation method
  • A kind of mixed enhanced bonded gypsum and its preparation method
  • A kind of mixed enhanced bonded gypsum and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0021] In this embodiment, the preparation of 100 kg of mixed reinforced cemented gypsum is taken as an example, and its preparation method is as follows.

[0022] Weigh the ingredients according to the prescribed ratio, and the dosage (kg) of each raw material is as follows:

[0023]

[0024] Desulfurization gypsum is the waste residue produced after desulfurization of flue gas in power plants, and hemihydrate gypsum (CaSO 4 1 / 2H 2 O), ground to 0.045mm, square hole sieve residual ≤ 3.6%.

[0025] The fine sand is yellow sand with quartz sandstone as raw material to produce high-grade lightweight aggregate concrete, with a mesh number of 60-80 mesh.

[0026] The light powder is silica fume, more than 80% of which have a fineness of ≤1μm, the particle size is 0.1-0.3μm, and the specific surface area is 25m 2 / g.

[0027] The powdery Nai series superplasticizer is FDN210 from Shanghai Huiyu Industrial Co., Ltd.

[0028] Put the above-mentioned various raw materials into...

Embodiment 2

[0031] In this embodiment, the preparation of 100 kg of mixed reinforced cemented gypsum is taken as an example, and its preparation method is as follows.

[0032] Weigh the ingredients according to the prescribed ratio, and the dosage (kg) of each raw material is as follows:

[0033]

[0034] Desulfurization gypsum is the waste residue produced after desulfurization of flue gas in power plants, and hemihydrate gypsum (CaSO 4 1 / 2H 2 O), ground to 0.035mm, square hole sieve residual ≤ 6.8%.

[0035] The fine sand is yellow sand with quartz sandstone as raw material to produce high-grade lightweight aggregate concrete, with a mesh number of 80-100 mesh.

[0036] The light powder is silica fume, more than 80% of which have a fineness of ≤1μm, the particle size is 0.1-0.2μm, and the specific surface area is 28m 2 / g.

[0037] The powdery polycarboxylate superplasticizer is selected from Fuke Technology (Canada) Niyon-790.

[0038] Put the above-mentioned various raw mate...

Embodiment 3

[0041] In this embodiment, the preparation of 100 kg of mixed reinforced cemented gypsum is taken as an example, and its preparation method is as follows.

[0042] Weigh the ingredients according to the prescribed ratio, and the dosage (kg) of each raw material is as follows:

[0043]

[0044] Desulfurization gypsum is the waste residue produced after desulfurization of flue gas in power plants, and hemihydrate gypsum (CaSO 4 1 / 2H 2 O), ground to 0.055mm, square hole sieve residual ≤ 10%.

[0045] The fine sand is yellow sand with quartz sandstone as raw material to produce high-grade lightweight aggregate concrete, with a mesh number of 100-120 mesh.

[0046] The light powder is silica fume, more than 80% of which have a fineness of ≤1μm, the particle size is 0.2-0.3μm, and the specific surface area is 20m 2 / g.

[0047] The powdery Nai series superplasticizer is FDN210 from Shanghai Huiyu Industrial Co., Ltd.

[0048] Put the above-mentioned various raw materials int...

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Abstract

The invention discloses a mix-enhanced binding gypsum and a preparation method thereof. The binding gypsum comprises the following components in percentage by weight: 41-64% of desulfurized gypsum, 5-15% of light-weight powder, 23-40% of fine sand, 1-5% of organic binder, 1-5% of inorganic binder and 1-2% of retarder. The preparation method comprises the following steps: proportionally weighing the materials, sequentially putting into a mixing machine, and thoroughly mixing to obtain the mix-enhanced binding gypsum. The mix-enhanced binding gypsum has favorable binding strength and compression strength. The main raw material is the desulfurized gypsum, thereby opening up a new way for comprehensive utilization of industrial solid waste and achieving the dual effects of environmental protection and waste utilization. The mix-enhanced binding gypsum can greatly lower the production cost of the inorganic material, and is convenient for transportation. The mix-enhanced binding gypsum is simple in preparation technique and convenient for construction.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of industrial solid waste and its chemical building materials, and in particular relates to a mixed enhanced bonding gypsum and a preparation method thereof. Background technique [0002] At present, as a new type of building material, gypsum building materials are more and more widely used in modern construction projects due to their basic characteristics such as good heat insulation, fire prevention, light weight, air humidity adjustment, green safety and environmental protection. At the same time, my country is a big emitter of phosphogypsum and other chemical by-products, gypsum, and has abundant gypsum resources. For the coordinated development of resources, environment and economy, the state vigorously promotes the use of gypsum building materials. Gypsum products that have been developed, such as gypsum blocks for lightweight partition walls, gypsum strips, paper-faced gy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14C04B14/06
Inventor 薛东升谢旭东
Owner 上海贝恒人居建设集团有限公司
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