Grade-C60 high-strength recycled concrete and preparation method thereof

A technology of recycled concrete and preparation method, applied in the field of building materials, can solve the problems affecting the application of recycled concrete, large porosity and low elastic modulus of recycled concrete, and achieve sustainable development, recycling and good economic benefits. Effect

Inactive Publication Date: 2016-08-03
SHENYANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the large porosity, high water absorption, low elastic modulus and insufficient strength of recycled concrete, the application of recycled concrete in practical engineering has been affected.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The components and contents of C60 grade self-compacting high-strength concrete formula 1 are: cement: silica fume: recycled coarse aggregate: sand: water: high-efficiency water reducing agent is 500:50:1080:660:190:7 (unit is kilogram per cubic meters); the composition and content of formula 2 are: cement: silica fume: recycled coarse aggregate: sand: water: superplasticizer is 500:50:1080:660:180:7 (unit is kilogram per cubic meter ).

[0035] The preparation method of formula 1 and formula 2 comprises the following steps:

[0036] Step 1: preparation of materials; prepare raw materials according to the components and contents of formula 1 and formula 2 respectively;

[0037] Step 2: Pour the recycled coarse aggregate, sand, cement, and silica fume prepared in formula 1 and formula 2 in step 1 into the mixer in sequence and stir for 45-60 seconds, so that the coarse and fine aggregate and cementitious material can be fully and evenly mixed mixed distribution;

[00...

Embodiment 2

[0045] The components and content of C60 high-strength recycled concrete formula 3 are: cement: silica fume: recycled coarse aggregate: sand: water: superplasticizer is 500:30:1080:660:180:7 (unit is kilogram per cubic meter m); the composition and content of formula 4 are: cement: silica fume: recycled coarse aggregate: sand: water: superplasticizer is 500:50:1080:660:180:7 (unit is kilogram per cubic meter) .

[0046] The preparation method of formula 3 and formula 4 comprises the following steps:

[0047] Step 1: preparation of materials; prepare raw materials according to the components and contents of formula 3 and formula 4 respectively;

[0048] Step 2: Pour the recycled coarse aggregate, sand, cement, and silica fume prepared in step 1 into the mixer in turn and stir for 45-60 seconds, so that the coarse and fine aggregate and cementitious material can be fully and evenly mixed and distributed;

[0049] Step 3: Mix the high-efficiency water reducer evenly with ordina...

Embodiment 3

[0056] A C60 grade high-strength recycled concrete and its preparation method. The composition of the concrete includes cement, silica fume, recycled coarse aggregate, sand, water, and high-efficiency water reducing agent. The number of kilograms of the composition is: cement: silica fume: recycled coarse aggregate: sand: water: superplasticizer is 480:50:1100:680:175:8.

[0057] A C60 grade high-strength recycled concrete and a preparation method thereof, the preparation method comprising the following steps:

[0058] Step 1: Preparation of materials; according to the kilograms of each component contained in each cubic meter of concrete, namely cement: silica fume: recycled coarse aggregate: sand: water: high-efficiency water reducing agent is 480: 50: 1100: 680: 175: 8 prepare raw materials;

[0059] Step 2: Pour the recycled coarse aggregate, sand, cement, and silica fume prepared in step 1 into the mixer in turn and stir for 45-60 seconds, so that the recycled coarse aggr...

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Abstract

The invention relates to field of building materials, in particular to a grade-C60 high-strength recycled concrete and a preparation method thereof.The grade-C60 high-strength recycled concrete is characterized by being prepared according to the specific gravity of cement to silica fume to recycled coarse aggregate to sand to water to a high-efficiency water reducing agent of (480-500) to (25-55) to (950-1100) to (640-680) to (175-190) to (7-8) (unit: Kg / m<3>).Compared with the prior art, the recycled coarse aggregate replacement rate of 100% is taken into consideration for the high-strength recycled concrete, the high-strength recycled concrete is further in line with a green, clean, low-carbon and environmental-protection construction concept, is high in strength grade and excellent in workability and can serve as casting reinforced concrete, steel reinforced concrete, steel tube concrete and a variety of other structural forms.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a C60 grade high-strength recycled concrete and a preparation method thereof. Background technique [0002] The acceleration of urban construction and the frequent occurrence of natural disasters such as earthquakes have resulted in a large increase in construction waste. According to statistics, the amount of building demolition waste and construction waste in most countries in the world accounts for about 30% to 40% of the total urban waste. These waste concretes contain a large amount of sand and gravel aggregates. If they can be recycled reasonably to produce recycled concrete and used in new buildings, it will not only reduce costs, save natural resources, alleviate the contradiction between supply and demand of aggregates, but also Reducing the pollution of waste concrete to the environment is an important part of the sustainable development strategy. Therefore, how to f...

Claims

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Application Information

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IPC IPC(8): C04B28/02C04B14/06C04B18/14C04B18/16C04B103/30
CPCC04B28/02C04B18/146C04B14/06C04B18/16C04B2103/302Y02W30/91
Inventor 刘晓高璐任攀王兵王文达
Owner SHENYANG UNIV
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