Determination method of optimal scheme for preparing recycled aggregate product
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A technology of recycled aggregate and the best solution, which is applied in the field of determination of the best solution for the preparation of recycled aggregate products, can solve the problems of complicated experiments, economical and high time costs of recycled aggregate products, and achieve the goal of increasing the speed of experiments, protecting the environment, cost reduction effect
Inactive Publication Date: 2019-04-26
KUNMING UNIV OF SCI & TECH
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Problems solved by technology
The existing technology is mainly to determine the formula of recycled aggregate products through experience or complicated experiments. However, due to the different properties of construction waste in various places, the experiment of a single factor is complicated, resulting in high economic and time costs for research on recycled aggregate products.
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Embodiment 1
[0022] A method for determining the best solution for preparing recycled aggregate products, the specific steps are as follows:
[0023] (1) Determine the influencing factor x 1 、x 2 、x 3..... x n , n≥4, where the influencing factor x 1 Set as the particle size of recycled aggregate;
[0024] (2) Influencing factor x in step (1) 1 Recycled aggregate is recycled concrete aggregate or recycled brick aggregate or a mixture of recycled concrete aggregate and recycled brick aggregate in any ratio. The particle size is divided into 6 grades according to the national standard, respectively 4.75-9.5mm, 4.75 -16mm, 4.75-19mm, 4.75-26.5mm, 4.75-31.5mm, 4.75-37.5mm, select 4 or more levels continuously from the first level among the 6 levels, and take other influencing factors x i Evenly divided into groups with the same number of grades, 1
Embodiment 2
[0028] A method for determining the best solution for preparing recycled aggregate products, the specific steps are as follows:
[0029] (1) Determine the influencing factors as the particle size of recycled aggregate (x 1 ), the ratio of natural aggregates replaced by regenerated bone (x 2 ), the ratio of recycled concrete aggregate to recycled aggregate (x 3 ), the vibration frequency of the mixed material (x 4 ), the vibration time of the mixed material (x 5 ), the recycled aggregate is a mixture of recycled concrete and recycled bricks, and the natural aggregate is small pieces of broken natural stone;
[0030] (2) According to the national standard, the particle size of the recycled aggregate (x 1 ) is divided into 6 levels, namely 4.75-9.5mm, 4.75-16mm, 4.75-19mm, 4.75-26.5mm, 4.75-31.5mm, 4.75-37.5mm, and other influencing factors of recycled aggregate particle size (x 1 ), the ratio of natural aggregates replaced by regenerated bone (x 2 ), the ratio of recycled ...
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Abstract
The invention discloses a determination method of an optimal scheme for preparing a recycled aggregate product. The determination method comprises the steps of setting the particle size of a recycledaggregate as one of influencing factors; dividing the particle size into six levels according to the national standard; continuously selecting four or more than four levels starting from the first level, and evenly dividing other influencing factors into groups having the same number as the levels; mixing the raw materials, then adding water into the raw materials, shaping, smoothening and maintaining the mixture to obtain the recycled aggregate product; detecting the compressive strength of the recycled aggregate product; performing linear regression fitting on the compressive strength and the influencing factors to obtain an equation; and importing the equation into MATLAB (matrix laboratory) software, solving the value corresponding to each influencing factor when the compressive strength is maximum to determine the optimal scheme. With adoption of the determination method of the optimal scheme for preparing the recycled aggregate product, a formula of the recycled aggregate productis rapidly determined, the process of screening and allocating standard grading is eliminated, the fuzziness and randomness of the recycled aggregate can be considered, the composite material is prepared by large-scale and multi-scale utilization of the recycled aggregate, the wastes are utilized, the environment is protected, the cost is reduced and the recycled aggregate product with excellentperformance is produced.
Description
technical field [0001] The invention relates to the fields of environmental protection and energy saving technology and green building materials technology, in particular to a method for determining the best solution for preparing recycled aggregate products. Background technique [0002] Recycled aggregate product technology is one of the main measures to develop green concrete and realize the sustainable development of architecture, resources and environment. It is increasingly attracting the attention of concrete researchers and more and more attention from engineering circles. [0003] In recent years, the amount of construction waste generated in my country is huge, about 3.5 billion tons per year, including 1.5 billion tons of demolition and construction waste, and 2 billion tons of engineering spoils, but the recycling rate is less than 5%, far lower than 70% in developed countries and regions -98%. With the rapid development of urbanization, the amount of constructio...
Claims
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