Tolerance-type recycled concrete and preparation method and application thereof

A technology of recycled concrete and concrete blocks, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of environmental damage, high production cost of ordinary recycled concrete, etc., and achieve simple production process and reduce irreplaceable The development of renewable resources and the effect of reducing production costs

Inactive Publication Date: 2013-07-10
JIANGSU YONGTAI CONSTR ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, the mining of concrete aggregates is about 8 billion tons per year, which seriously damages the environment
[0003] In order to solve the above problems, there are a lot of research results on the performance and application of recycled concrete, but so far these studies have been less applied in actual engineering structures. The main reason is that the production cost of ordinary recycled concrete is high, and the recycled concrete aggregate Processing technology and cost become the bottleneck restricting its engineering application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The mass ratio of components is cement: medium sand: gravel: water reducer: C30 old material concrete block: water = 1: 2.87: 1.03: 0.017: 2.35: 0.57.

[0027] The cement is PO42.5 Portland cement. The sand is medium sand, and the fineness modulus of medium sand is 2.3-3.0. The crushed stone is basalt crushed stone, and the particle size of the basalt crushed stone is 5mm-25mm. The particle size of the old concrete block is 25mm-63.5mm. The water reducer is naphthalenesulfonate water reducer.

[0028] Preparation Process:

[0029] (1) First weigh cement, sand, gravel, naphthalene-based high-efficiency solid water reducer, old concrete block and water according to the mass ratio;

[0030] (2) Pour cement, sand, water reducer and water into the mixer in turn, and stir for 20-30S;

[0031] (3) Put the gravel into the mixed material stirred in step 2, and stir for 15-25S;

[0032] (4) Put the old concrete block into the mixed material stirred in step 3, stir for 60-90...

Embodiment 2

[0035] The mass ratio of the components is PO42.5 Portland cement: medium sand: crushed stone: water reducer: C30 old material concrete block: water = 1: 2.64: 0.92: 0.016: 2.18: 0.53.

[0036] The cement is PO42.5 Portland cement. The sand is medium sand, and the fineness modulus of medium sand is 2.3-3.0. The crushed stone is basalt crushed stone, and the particle size of the basalt crushed stone is 5mm-25mm. The particle size of the old concrete block is 25mm-63.5mm. The water reducer is naphthalenesulfonate water reducer.

[0037] Preparation Process:

[0038] (1) First weigh cement, sand, gravel, naphthalene-based high-efficiency solid water reducer, old concrete block and water according to the mass ratio;

[0039] (2) Pour cement, sand, water reducer and water into the mixer in turn, and stir for 20-30S;

[0040] (3) Put the gravel into the mixed material stirred in step 2, and stir for 15-25S;

[0041] (4) Put the old concrete block into the mixed material stirre...

Embodiment 3

[0044] The mass ratio of the components is PO42.5 Portland cement: medium sand: crushed stone: water reducer: C30 old material concrete block: water = 1: 2.41: 0.81: 0.014: 2.01: 0.49.

[0045] The cement is PO42.5 Portland cement. The sand is medium sand, and the fineness modulus of medium sand is 2.3-3.0. The crushed stone is basalt crushed stone, and the particle size of the basalt crushed stone is 5mm-25mm. The particle size of the old concrete block is 25mm-63.5mm. The water reducer is naphthalenesulfonate water reducer.

[0046] Preparation Process:

[0047] (1) First weigh cement, sand, gravel, naphthalene-based high-efficiency solid water reducer, old concrete blocks and water according to the mass ratio;

[0048] (2) Pour cement, sand, water reducer and water into the mixer in turn, and stir for 20-30S;

[0049] (3) Put the gravel into the mixed material stirred in step 2, and stir for 15-25S;

[0050] (4) Put the old material concrete block into the mixed mater...

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PUM

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Abstract

The invention discloses tolerance-type recycled concrete which comprises the following components: cement, sand, broken stone, a water reducing agent, waste concrete blocks and water. The mass ratio of the cement, sand, broken stone, water reducing agent, waste concrete blocks and the water is 1: 2-3.5: 0.3-2.0: 0.014-0.024: 1.2-3.6: 0.45-0.65. The cost is low, the process is simple, and the strength of the produced concrete is qualified. The tolerance-type recycled concrete is mainly used for concrete projects with large size or volume, sufficient distance among reinforcing steel bars, low reinforcement ratio and low conveying height.

Description

technical field [0001] The invention relates to a recycled concrete, in particular to an inclusive recycled concrete, its preparation method and its application. Background technique [0002] At present, the amount of construction waste generated worldwide due to building demolition, wars, earthquakes and other reasons is astonishing, among which the discharge of waste concrete is the highest, about 5 trillion tons per year, and with the development of the economy, the discharge is still increasing year by year Increase. On the other hand, the mining of concrete aggregates is about 8 billion tons per year, which seriously damages the environment. [0003] In order to solve the above problems, there are a lot of research results on the performance and application of recycled concrete, but so far these studies have been less applied in actual engineering structures. The main reason is that the production cost of ordinary recycled concrete is high, and the recycled concrete ag...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B18/16
CPCY02W30/91
Inventor 蒋凤昌奚友方居平国周桂香姜晔丁建成朱水勇管乔兵沈兵瑞
Owner JIANGSU YONGTAI CONSTR ENG
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