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Aggregate floating prevention lightweight ceramsite concrete and preparation method thereof

A lightweight ceramsite and concrete technology, applied in the field of cement concrete products, can solve problems such as limited application, and achieve the effects of reducing bulk density, reducing density difference, and good social and economic benefits

Inactive Publication Date: 2019-03-01
HUNAN CSCEC5B CONCRETE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, lightweight aggregate concrete also has many technical problems, which limit its application in actual production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: a kind of LC20, the preparation of the lightweight ceramsite concrete of bulk density 1300kg / m3

[0024] (1) Aggregate gradation mass ratio of lightweight ceramsite concrete

[0025] 5-10mm ceramsite

10-20mm ceramsite

20-31.5mm ceramsite

river sand

Pottery

30%

50%

20%

120%

40%

[0026] Among them, the bulk density of ceramsite is 600kg / m3, and the 1h water absorption rate is 13%. The river sand is Class II river sand with a fineness of 2.5.

[0027] (2) Mass ratio of lightweight ceramsite concrete:

[0028] cement

Silica fume

fly ash

Shale ceramsite

Ceramsite sand

river sand

water

Welan Gum

HPMC

hydrogen peroxide

Superplasticizer

280

30

40

360

144

432

140

0.07

0.035

10

6

[0029] in,

[0030] Cement: commercially available, the model is P.O 42.5 cement;

[0031] Fly ash: commercially available, power plant class II c...

Embodiment 2

[0040] Embodiment 2: the preparation of a kind of LC10, the lightweight ceramsite concrete of bulk density 800kg / m3

[0041] (1) Aggregate gradation mass ratio of lightweight ceramsite concrete

[0042] 5-10mm ceramsite

10-20mm ceramsite

20-31.5mm ceramsite

river sand

Pottery

30%

40%

30%

100%

60%

[0043] Among them, the bulk density of ceramsite is 580kg / m3, and the water absorption rate of 1h is 15%. The river sand is Class II river sand with a fineness of 2.5.

[0044] (2) Mass ratio of lightweight ceramsite concrete:

[0045] cement

Silica fume

fly ash

Shale ceramsite

Ceramsite sand

river sand

water

HPMC

Welan Gum

hydrogen peroxide

Superplasticizer

220

30

20

200

120

200

132

0.405

0.81

8

5

[0046] in,

[0047] Cement: commercially available, the model is P.O 42.5 cement;

[0048] Fly ash: commercially available, power plant class II ...

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Abstract

The invention relates to aggregate floating prevention lightweight ceramsite concrete. The aggregate floating prevention lightweight ceramsite concrete is prepared from the following components: coalash, lightweight ceramsite, ceramsite sand, fine aggregate, hydrogen peroxide, hydroxypropyl methyl cellulose, welan gum, water and a polycarboxylic admixture according to the mass ratio of (200 to 300):(20 to 40):(20 to 60):(180 to 400):(100 to 160):(180 to 450):(6 to 12):(0.024 to 0.048):(0.048 to 0.192):(125 to 150):(4 to 8). The volume weight of the prepared lightweight ceramsite concrete canbe adjusted in the 800-1500 kg / m<3> interval, the strength interval is 5-30 MPa, and the heat conductivity interval is 0.15-0.25 W / m.K; broken ceramsite slag is adopted as ceramsite sand, the accumulation storage problem of the broken slag as waste is solved, and the aggregate floating prevention lightweight ceramsite concrete has good social and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of cement concrete products, and in particular relates to an anti-aggregate floating lightweight ceramsite concrete and a preparation method thereof. Background technique [0002] With the rapid development of concrete technology, the demand for lightweight aggregate concrete in the construction market is increasing. Lightweight aggregate concrete has excellent properties such as reducing dead weight, improving building height, span, heat insulation, sound insulation and earthquake resistance. However, lightweight aggregate concrete also has many technical problems, which limit its application in actual production. Since the density of lightweight aggregate is much smaller than that of cement mortar, the phenomenon of aggregate floating in lightweight aggregate concrete has always been a major problem in the engineering field. How to use technical means to reduce the degree of aggregate floating and improve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B111/40
CPCC04B28/04C04B2111/40C04B2201/20C04B2201/32C04B18/146C04B18/08C04B18/027C04B22/068C04B24/383C04B2103/302C04B24/38C04B14/068
Inventor 刘哲李曦蒋震冷政向佳瑜曾维
Owner HUNAN CSCEC5B CONCRETE
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