Recycled fine aggregate high-strength self-compact concrete

A technology of self-compacting concrete and recycled fine aggregates, which is applied in the field of concrete configuration, can solve the problems of poor comprehensive mechanical properties of self-compacting concrete, and achieve the effects of good resistance to tensile deformation, enriching straw resources, and improving the preparation process.

Inactive Publication Date: 2019-01-08
四川国泰高新管廊产业投资有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the comprehensive mechanical properties of self-compacting concrete in the prior art are poor and cannot meet the requirements of use, and a kind of recycled fine aggregate high-strength self-compacting concrete is proposed

Method used

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  • Recycled fine aggregate high-strength self-compact concrete

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of recycled fine aggregate high-strength self-compacting concrete, including the following raw materials expressed by weight percentage:

[0028] Portland cement 20%;

[0029] Slag 5%;

[0030] Silicon fume 1%;

[0031] Recycled fine aggregate 30%;

[0032] Natural aggregate 35%;

[0033] water 10%;

[0034] Polycarboxylate superplasticizer 0.2%;

[0035] Thickener 0.1%;

[0036] Fiber 0.1%.

[0037] Preferably, the ore powder is S95 grade granulated blast furnace slag powder, and the density of silicon powder is 2400kg / m 3 , the specific surface area is 15000m 2 / kg, recycled fine aggregate refers to the recycled fine aggregate particles obtained by crushing, reshaping, and screening waste concrete, and the particle size is not greater than 4.5mm. Natural aggregate is composed of fine aggregate and coarse aggregate, of which fine aggregate The fineness modulus of the aggregate is 2.5-3.0, and the particle size of the coarse aggregate is 10-20mm, continu...

Embodiment 2

[0044] A kind of recycled fine aggregate high-strength self-compacting concrete, including the following raw materials expressed by weight percentage:

[0045] Portland cement 20%;

[0046] Slag 8%;

[0047] Silicon fume 2%;

[0048] Recycled fine aggregate 25%;

[0049] Natural aggregate 35%;

[0050] water 10%;

[0051] Polycarboxylate superplasticizer 0.2%;

[0052] Thickener 0.1%;

[0053] Fiber 0.1%.

[0054] Preferably, the ore powder is S95 grade granulated blast furnace slag powder, and the density of silicon powder is 2400kg / m 3 , the specific surface area is 15000m 2 / kg, recycled fine aggregate refers to the recycled fine aggregate particles obtained by crushing, reshaping, and screening waste concrete, and the particle size is not greater than 4.5mm. Natural aggregate is composed of fine aggregate and coarse aggregate, of which fine aggregate The fineness modulus of the aggregate is 2.5-3.0, and the particle size of the coarse aggregate is 10-20mm, continu...

Embodiment 3

[0061] A kind of recycled fine aggregate high-strength self-compacting concrete, including the following raw materials expressed by weight percentage:

[0062] Portland cement 25%;

[0063] Slag 5%;

[0064] Silicon fume 1%;

[0065] Recycled fine aggregate 25%;

[0066] Natural aggregate 35%;

[0067] water 10%;

[0068] Polycarboxylate superplasticizer 0.5%;

[0069] Thickener 0.1%;

[0070] Fiber 0.1%.

[0071] Preferably, the ore powder is S95 grade granulated blast furnace slag powder, and the density of silicon powder is 2400kg / m 3 , the specific surface area is 15000m 2 / kg, recycled fine aggregate refers to the recycled fine aggregate particles obtained by crushing, reshaping, and screening waste concrete, and the particle size is not greater than 4.5mm. Natural aggregate is composed of fine aggregate and coarse aggregate, of which fine aggregate The fineness modulus of the aggregate is 2.5-3.0, and the particle size of the coarse aggregate is 10-20mm, continu...

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Abstract

The invention discloses recycled fine aggregate high-strength self-compact concrete. The concrete comprises the following raw materials: Portland cement, slags, a ganister powder, recycled fine aggregates, natural aggregates, water, a polycarboxylate superplasticizer, a thickening agent and a fiber. A production method of the concrete comprises the following steps: adding the weighed Portland cement, slags, a ganister powder and a half of the whole water into an agitator to carry out agitation for 1 min for sufficient wetting; adding the thickening agent, the fiber and the polycarboxylate superplasticizer to carry out agitation for 5-8 minutes for sufficient mixing and dispersion so as to obtain a pasty mixture A; and mixing and agitating the recycled fine aggregates and the residual waterfor 3-5 minutes, and adding the mixture A and the natural aggregates to agitate for 10 minutes so as to obtain a finished product. The whole mechanical property of the obtained concrete is remarkablyimproved; the recycled fine aggregates are produced by utilizing building waste, so that the resources are recycled; and crop straws are sufficiently utilized, so that the raw materials are saved, the living environment of the human beings is improved, the environment is protected and the energy is reduced.

Description

technical field [0001] The invention relates to the technical field of concrete configuration, in particular to a high-strength self-compacting concrete made of recycled fine aggregate. Background technique [0002] With the development trend of high-rise, long-span, lightweight, underground and harsh environment of modern buildings, the requirements for the strength and durability of concrete used in modern construction projects are also getting higher and higher. Due to the continuous development of modern concrete engineering in the direction of scale and complexity, the reinforcement in the concrete body is becoming more and more complex and dense, making it more difficult to pour and vibrate, which makes it difficult to guarantee the quality of the project. For the reinforcement works of existing buildings and bridges, etc., it is difficult to use ordinary concrete for normal construction. Under this engineering background, self-compacting concrete has been widely used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B18/141C04B18/146C04B18/167C04B14/02C04B18/24C04B24/383C04B2103/302
Inventor 杨坤雷斌李季张高伟陈仪彭伟
Owner 四川国泰高新管廊产业投资有限公司
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