Design method for recycled aggregate concrete mix proportion
A technology for recycled concrete and recycled aggregates, applied in chemical instruments and methods, clay preparation devices, liquid ingredient supply devices, etc., can solve the problems of inability to design the mix ratio, and achieve the benefits of popularization, reduction of standard deviation, and saving The effect of production costs
Inactive Publication Date: 2021-08-10
长泰县华信混凝土有限公司
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Problems solved by technology
[0004] The purpose of the present invention is to solve the shortcoming that a suitable mix ratio cannot be designed by using JGJ55-2011 "Ordinary Concrete Mix Proportion Design Regulations" in the prior art, and propose a design method for the mix ratio of recycled aggregate concrete
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[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.
[0027] A method for designing the proportion of recycled aggregate concrete, comprising the following steps:
[0028] S1: Design the gradation of recycled coarse aggregate referring to the Standards for the Quality and Inspection Methods of Sand and Stone for Ordinary Concrete;
[0029] S2: Set the design strength of the recycled aggregate concrete to be prepared, and determine the particle size and slump of the recycled coarse aggregate;
[0030] S3: According to the slump required by the construction and the maximum particle size of the coarse aggregate, consult the corresponding table in the "Ordinary Concrete Mixture Design Regulations" to determine the unit recy...
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Abstract
The invention belongs to the technical field of construction of recycled concrete and products thereof, in particular to a design method for a recycled aggregate concrete mix proportion. In order to solve the problem that a proper mix proportion cannot be designed according to an existing JGJ55-2011 Common Concrete Mix Proportion Design Discipline, a scheme is provided as follows: the method comprises the following steps: S1, designing grading of a recycled coarse aggregate with reference to Sand and Stone Quality and Inspection Method Standard for Common Concrete; S2, setting a design strength of recycled aggregate concrete needed to be prepared, and determining a grain size and a slump of the recycled coarse aggregate; and S3, determining a water consumption of the unit recycled aggregate concrete on the basis of consulting to a corresponding table of the Common Concrete Mix Proportion Design Discipline according to the slump and the maximum grain of the coarse aggregate required by construction. The mix proportion of the recycled aggregate concrete is determined by way of a free water cement ratio, such that the standard difference can be reduced greatly, the production cost is saved and the method is favorably popularized and used while the cement dosage is saved.
Description
technical field [0001] The invention relates to the field of construction of recycled concrete and its products, in particular to a method for designing the mixing ratio of recycled aggregate concrete. Background technique [0002] my country is currently in the process of large-scale urbanization, and the construction industry is facing two major problems: construction waste disposal and sand and gravel resource shortage. According to statistics, my country's annual urban output of construction waste is about 2.4 billion tons, which has accounted for urban 40% of the total garbage. The total amount of waste concrete in construction waste is the largest, reaching 30%-40%. In addition, with the rapid development of the construction industry, the demand for natural sand and gravel resources is also increasing day by day. In 2012, my country's construction area reached 9.86427 billion square meters, and the average material consumption index of residential projects pointed out...
Claims
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IPC IPC(8): B28C5/00B28C7/12C04B28/00C04B18/16
CPCB28C5/003B28C7/12C04B28/00C04B18/16Y02W30/91
Inventor 姜未林木成林祖辉
Owner 长泰县华信混凝土有限公司