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Lightweight permeable concrete of iron tailing sludge ceramsite and preparation method of ceramsite

A technology of permeable concrete and lightweight concrete, applied in the field of building materials, can solve the problems of inability to aggregate and affect the safe mining of mines, and achieve the effects of fast construction, full resource utilization, secondary utilization of resources and circular economy.

Inactive Publication Date: 2017-08-04
CHINA MCC17 GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] After the iron tailings are washed, the coarse and fine tailings can be used as fine aggregates for concrete, but the tailings sludge that settles at the end cannot be used as aggregates because of the extremely fine tailings and clay micelles. If backfilling will also affect the safe mining of mines

Method used

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  • Lightweight permeable concrete of iron tailing sludge ceramsite and preparation method of ceramsite
  • Lightweight permeable concrete of iron tailing sludge ceramsite and preparation method of ceramsite

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Experimental program
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Effect test

Embodiment 1

[0033] Iron tailings sludge ceramsite is a mixture of iron tailings sludge as plastic component, urban sludge as fuel and fly ash as skeleton. After conventional granulation and firing, the firing cost is only 2 / 3 of ordinary ceramsite About sludge ceramsite products, and the solid waste utilization rate of the raw materials used in this product has reached 100%. Convert the residual sludge, fly ash slag, tailings sludge and other solid wastes that will cause secondary environmental pollution in the surrounding urban water treatment around the iron mine into artificial light aggregate products that are urgently needed for the construction of sponge cities. Sludge ceramsite It can completely fix heavy metal ions in municipal sludge.

[0034] The nominal particle diameter of the iron tailings slime is less than 0.6mm, the mud mass content is ≤1.0%, the sulfide and sulfate content is ≤0.5%, and the chloride content is ≤0.02%.

[0035] A preparation method of iron tailings sludge...

Embodiment 2

[0045] Table 2 shows the physical properties of iron tailings sludge ceramsite performance with the amount of municipal sludge added.

[0046] Table 2 Performance of iron tailings sludge ceramsite products with different compositions

[0047] Sample serial number Dry sludge content / (%,wt) Stacking density / (kg m -3 )

[0048] It can be seen from the table that with the increase of the amount of urban sludge, the bulk density of the iron tailings sludge ceramsite sample gradually decreases. When the urban sludge content is 50%, the density of the iron tailings sludge ceramsite sample Bulk density reduced to 760kg m -3 ; When the urban sludge content in the iron tailings sludge ceramsite body is 40%, the fly ash is 35%, and the aggregate tailings is 25%, the iron tailings sludge ceramsite sample after sintering at 1040 ° C has a relatively ideal Excellent light aggregate performance, with a bulk density of 790kg m -3 , Cylinder compressive strength is 5.6MPa, 1h ...

Embodiment 3-6

[0050] Table 3 lists the iron tailings sludge ceramsite lightweight permeable concrete mix ratio (kg m -3 )

[0051] Table 3 Mixing ratio of iron tailings sludge ceramsite lightweight permeable concrete (kg m -3 )

[0052]

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Abstract

The invention discloses lightweight permeable concrete of iron tailing sludge ceramsite and a preparation method of the ceramsite. The lightweight permeable concrete of the iron tailing sludge ceramsite contains the iron tailing sludge ceramsite, portland cement or ordinary silicon cement, silica fume, an acrylic resin emulsion, a pigment, a polycarboxylate superplasticizer and water; and the ceramsite is prepared from iron tailing sludge, municipal sludge and coal ashes. The permeable concrete has the advantages of being high in permeability, wear-resistant, skid-resistant, ecological, environment-friendly and fast in constriction, and is a novel ground permeable pavement material, the cost of the permeable concrete can be greatly reduced and popularization and application of the permeable concrete in sponge city construction are accelerated; and from the perspective of tailing management, mitigation of environmental pollution is facilitated and great social, economic and ecological benefits are brought.

Description

technical field [0001] The invention belongs to the field of building materials, and is an ecological environment-friendly permeable material, in particular to an iron tailings sludge ceramsite lightweight permeable concrete and a preparation method of the ceramsite. Background technique [0002] The General Office of the State Council forwarded the "Green Building Action Plan" formulated by the National Development and Reform Commission and the Ministry of Housing and Urban-Rural Development with Guobanfa [2013] No. 1, which clearly requires the vigorous development of green building materials. At present, the government is actively promoting the sponge city project. The General Office of the State Council issued the "Guiding Opinions on Promoting the Construction of Sponge City" in October 2015 to deploy and promote the construction of sponge cities. Permeable concrete is a new type of ground paving material for the development and construction of sponge cities. It has hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B38/00C04B33/132C04B33/135
CPCC04B28/00C04B33/132C04B33/1352C04B38/009C04B2111/00017C04B2111/00284C04B2235/77C04B18/027C04B18/146C04B24/26C04B2103/54C04B2103/302Y02P40/60
Inventor 何兆芳杜培俊王景胜
Owner CHINA MCC17 GRP
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