Composite reinforced all-recycled brick aggregate concrete as well as optimization method and preparation method thereof

An optimization method and technology of recycled bricks, applied in complex mathematical operations, sustainable manufacturing/processing, forecasting, etc., can solve the problems of low comprehensive utilization rate of cement, large shrinkage rate of fully recycled brick aggregate concrete, and limited application, etc., to achieve Improve the efficiency of secondary hydration, improve the comprehensive utilization rate, and increase the effect of regeneration usage

Active Publication Date: 2022-04-26
ANYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Based on the relevant literature and previous test results, it can be seen that the fully recycled brick aggregate concrete has the following main disadvantages: (1) The strength of the fully recycled brick aggregate concrete is relatively low (the general strength is C15-C25), which limits its application in the engineering field , thus severely restricting the resource utilization of waste fired clay bricks; (2) the fully recycled brick aggregate concrete has a large shrinkage rate and is easy to crack; (3) the comprehensive utilization rate of cement in fully r

Method used

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  • Composite reinforced all-recycled brick aggregate concrete as well as optimization method and preparation method thereof
  • Composite reinforced all-recycled brick aggregate concrete as well as optimization method and preparation method thereof
  • Composite reinforced all-recycled brick aggregate concrete as well as optimization method and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] A C40 composite reinforced fully recycled brick aggregate concrete, composed of cement, active reinforcing agent, recycled brick coarse aggregate, recycled brick fine aggregate, steel fiber, cellulose fiber and water in a weight ratio of 1:0.015:0.808:0.347: 0.163:0.001:0.340 formulation.

[0071] The formula for calculating the mixing ratio is as follows:

[0072] 1. Calculation of water-cement ratio

[0073] (1) Weighted cement hydration degree calculation

[0074] Cement is P.O 42.5 Ordinary Portland Cement, where C 3 S=53%, C 2 S=16%, C 3A =8%, C 4 AF=10%, other admixtures are 13%.

[0075]

[0076] (2) Activity index and activity enhancement

[0077] Recycled brick aggregate activity coefficient K pc =78.80%.

[0078] The active enhancer is: Ca(OH) 2 , the dosage is 1% of the mass of the recycled brick coarse aggregate and 2% of the recycled brick fine aggregate, and the activity enhancement coefficient α EC = 1.109.

[0079] (3) Cement strength f ...

Embodiment 2

[0105] A C35 composite reinforced fully recycled brick aggregate concrete, composed of cement, active reinforcing agent, recycled brick coarse aggregate, recycled brick fine aggregate, steel fiber, cellulose fiber and water, in a weight ratio of 1:0.018:1.055:0.390 :0.129:0.002:0.390 formulated.

[0106] The formula for calculating the mixing ratio is as follows:

[0107] 1. Calculation of water-cement ratio

[0108] (1) Weighted cement hydration degree calculation

[0109] Cement is P.O 42.5 Ordinary Portland Cement, where C 3 S=55%, C 2 S=18%, C 3 A=10%, C 4 AF=8%, other admixtures are 9%.

[0110]

[0111] (2) Activity index and activity enhancement

[0112] Recycled brick aggregate activity coefficient K pc = 80.00%.

[0113] The active enhancer is: Ca(OH) 2 , the dosage is 1% of the mass of the recycled brick coarse aggregate and 2% of the recycled brick fine aggregate, and the activity enhancement coefficient α EC = 1.074.

[0114] (3) Cement strength f ...

Embodiment 3

[0140] A C30 composite reinforced fully recycled brick aggregate concrete, composed of cement, active reinforcing agent, recycled brick coarse aggregate, recycled brick fine aggregate, steel fiber, cellulose fiber and water, in a weight ratio of 1:0.023:1.339:0.495 :0.150:0.002:0.430 formulated.

[0141] The formula for calculating the mixing ratio is as follows:

[0142] 1. Calculation of water-cement ratio

[0143] (1) Weighted cement hydration degree calculation

[0144] Cement is P.O 42.5 Ordinary Portland Cement, where C 3 S=50%, C 2 S=20%, C 3 A=12%, C 4 AF=6%, other admixtures are 12%.

[0145]

[0146] (2) Activity index and activity enhancement

[0147] Recycled brick aggregate activity coefficient K pc =77.186%.

[0148] The active enhancer is: Ca(OH) 2 , the dosage is 1% of the mass of the recycled brick coarse aggregate and 2% of the recycled brick fine aggregate, and the activity enhancement coefficient α EC = 1.074.

[0149] (3) Cement strength f...

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Abstract

The invention relates to the technical industry related to energy conservation, environmental protection and new materials, and particularly discloses an optimization method for full-recycled brick aggregate concrete under the coupling action of volcanic ash activity enhancement and hybrid fiber enhancement, which comprises the following steps: firstly, carrying out chemical enhancement optimization on recycled brick aggregate to promote the effective active components of the recycled brick aggregate to react with Ca (OH) 2 to generate C-S-H gel; the compactness of the C-S-H gel is improved, the variety of the C-S-H gel is improved, the primary hydration rate of cement clinker in a certain range of the recycled brick aggregate is improved, and secondary hydration of the cement clinker is promoted; the recycled brick aggregate is further physically enhanced and optimized, and hybrid fibers of different materials and specifications are specifically selected to enhance the concrete in different dimensions. According to the optimization method and the corresponding concrete mix proportion, the defects of the all-recycled brick aggregate concrete are comprehensively improved, the performance of the all-recycled brick aggregate concrete is improved, resource utilization of the building waste sintered clay bricks is achieved, the comprehensive utilization rate of cement is remarkably increased, and the performance of the cement is fully exerted.

Description

technical field [0001] The invention relates to energy-saving, environmental protection and new material-related technology industries, in particular to composite reinforced fully recycled brick aggregate concrete and its performance optimization and preparation process. Background technique [0002] According to statistics, my country's construction waste production basically accounts for about 40% of the total urban waste. Every demolition of 10,000 square meters of old buildings will generate 7,000 to 12,000 tons of construction waste. According to estimates, by 2025, the annual construction waste will exceed 2.2 billion tons. Due to the imbalance of my country's economic development in the early stage, fired clay bricks have become the main component of construction waste, and its proportion is maintained at about 30% to 40%. [0003] It is an exploration of resource utilization to prepare recycled brick-aggregate concrete by crushing waste fired clay bricks. However, ...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B22/06G06Q10/04G06F17/10
CPCC04B28/04C04B22/064G06Q10/04G06F17/10C04B2201/50C04B18/165C04B14/48C04B16/02Y02P80/10Y02W30/91
Inventor 景嘉骅刘灵魏苗
Owner ANYANG NORMAL UNIV
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