阅读说明：本技术 一种再生骨料砌块的制备方法 (Preparation method of recycled aggregate building block ) 是由 金宸帆 于 2020-06-23 设计创作，主要内容包括：本发明涉及建筑材料技术领域,尤其是一种再生骨料砌块的制备方法,通过原料选取、原料配比组成、初步主材料混合搅拌、辅助材料混合搅拌、混合搅拌和成型制得再生骨料砌块。本发明的一种再生骨料砌块的制备方法,该方法制造成本低,其利用再生骨料代替透水混凝土中的石灰石骨料,将再生混凝土砌块砖粉碎筛选出合适的尺寸,通过工艺方法,制备满足工程要求的透水混凝土,不仅能够解决现有实际中建筑垃圾的急剧增长给环境、资源带来的各项问题,还能够将混凝土砌块砖材料二次利用,变废为宝,制备满足实际要求的透水路面。(The invention relates to the technical field of building materials, in particular to a preparation method of a recycled aggregate block. The preparation method of the recycled aggregate building block has low manufacturing cost, the recycled aggregate is used for replacing limestone aggregate in pervious concrete, the recycled concrete building block brick is crushed and screened out to be a proper size, and the pervious concrete meeting engineering requirements is prepared through a technological method, so that various problems brought to the environment and resources by the rapid increase of construction waste in the prior art can be solved, the concrete building block brick material can be recycled, waste is changed into wealth, and the pervious pavement meeting the actual requirements is prepared.)

1. The preparation method of the recycled aggregate block is characterized by comprising the following steps:

s1: selecting raw materials: cement, fly ash, recycled aggregate, lignosulfonate, sodium hydroxide, straws, cellulose ether, a polycarboxylic acid high-efficiency water reducing agent and a sodium oxide solution;

s2: the raw materials are proportioned as follows: 50-60% of cement, 10-15% of fly ash, 20-30% of recycled aggregate, 2-4% of lignosulfonate, 1-2% of sodium hydroxide, 5-8% of straw, 1-2% of cellulose ether and 2-3% of polycarboxylic acid high-efficiency water reducing agent;

s3: mixing and stirring primary main materials: mixing the cement, the recycled aggregate and the fly ash according to the proportion in the step S2, and then adding water for mixing and stirring;

s4: mixing and stirring auxiliary materials: mixing lignosulfonate, sodium hydroxide, straws, cellulose ether, a polycarboxylic acid high-efficiency water reducing agent and a sodium oxide solution according to the proportion in the step S2, and then adding water for mixing and stirring;

s5: mixing and stirring: after the main material and the auxiliary material in the steps S3 and S4 are mixed and stirred, uniformly mixing and stirring the main material and the auxiliary material;

s6: molding: pouring the mixture obtained in the step S5 into a mold, and continuously pressing for 6-9S under the pressure of 60-70kN by adopting a static pressure forming mode to prepare the recycled aggregate block.

2. The method for preparing a recycled aggregate block according to claim 1, wherein the mixing and stirring time of the main material in the step S3 is 10-15 min.

3. The method for preparing a recycled aggregate block according to claim 1, wherein the mixing and stirring time of the auxiliary materials in the step S4 is 5-10 min.

4. The method for preparing a recycled aggregate block according to claim 1, wherein the mixing time of the main material mixture and the auxiliary material mixture with each other in the step S5 is 30-35 min.

5. The method for preparing a recycled aggregate block according to claim 1, wherein the recycled aggregate is crushed and sieved to obtain a crushed stone-like material with a particle size of 5-10 mm.

Technical Field

The invention relates to the technical field of building materials, in particular to a preparation method of a recycled aggregate building block.

Background

The pervious concrete is an ecological building material with air permeability, water permeability, sound absorption and noise reduction, the internal porosity of the pervious concrete is 15% -35%, and the pervious concrete has large holes which are mutually communicated and has certain water permeability. The pervious concrete adopts partial or all recycled aggregates to replace natural aggregates, can save ore resources to a certain extent, has a certain degradation effect on the mechanical properties, and is generally improved by adopting methods of adding fine aggregates, modified recycled coarse aggregates or adding reinforcing agents and the like. The recycled aggregate pervious concrete is an environment-friendly and material-saving building material, meets the development requirements of the current circular economy and environmental protection of China, and is ecological concrete with large pores and a certain pervious function prepared by adopting aggregates produced by waste concrete. The recycled aggregate pervious concrete fully utilizes the functional advantages of the recycled concrete and the pervious concrete, and the recycled aggregate can be utilized to change waste into valuable, reduce the garbage disposal cost, save energy, reduce emission and reduce environmental pollution.

With the acceleration of the industrialized construction and the urbanized construction in China, concrete is one of the most widely used building materials with huge use amount at present, and meanwhile, the pollution of building garbage is increasingly serious. But the recovery rate of the construction waste in China is not enough, and the environment is greatly influenced. The recycled aggregate pervious concrete increases the use approach of the waste concrete with high added value, reduces the cost, and greatly improves the utilization rate of the waste aggregate, thereby reducing the environmental pollution. At present, the technology for preparing pervious concrete by utilizing recycled concrete aggregate is not mature enough, and the prepared pervious concrete has the problems of unqualified strength, poor water permeability and the like.

Disclosure of Invention

In order to overcome the defects that the strength of the existing pervious concrete does not reach the standard and the water permeability is poor, the invention provides a preparation method of a recycled aggregate block.

The technical scheme adopted by the invention for solving the technical problems is as follows: a preparation method of a recycled aggregate block comprises the following steps:

s1: selecting raw materials: cement, fly ash, recycled aggregate, lignosulfonate, sodium hydroxide, straws, cellulose ether, a polycarboxylic acid high-efficiency water reducing agent and a sodium oxide solution;

s2: the raw materials are proportioned as follows: 50-60% of cement, 10-15% of fly ash, 20-30% of recycled aggregate, 2-4% of lignosulfonate, 1-2% of sodium hydroxide, 5-8% of straw, 1-2% of cellulose ether and 2-3% of polycarboxylic acid high-efficiency water reducing agent;

s3: mixing and stirring primary main materials: mixing the cement, the recycled aggregate and the fly ash according to the proportion in the step S2, and then adding water for mixing and stirring;

s4: mixing and stirring auxiliary materials: mixing lignosulfonate, sodium hydroxide, straws, cellulose ether, a polycarboxylic acid high-efficiency water reducing agent and a sodium oxide solution according to the proportion in the step S2, and then adding water for mixing and stirring;

s5: mixing and stirring: after the main material and the auxiliary material in the steps S3 and S4 are mixed and stirred, uniformly mixing and stirring the main material and the auxiliary material;

s6: molding: pouring the mixture obtained in the step S5 into a mold, and continuously pressing for 6-9S under the pressure of 60-70kN by adopting a static pressure forming mode to prepare the recycled aggregate block.

Further, the mixing and stirring time of the main materials in the step S3 is 10-15 min.

Further, the time for mixing and stirring the auxiliary materials including the step S4 is 5-10 min.

Further, the time period including the mixing of the main material mixture and the auxiliary material mixture with each other in the step S5 is 30 to 35 min.

Further, the recycled aggregate is crushed and screened to obtain crushed stone-like materials with the particle size of 5-10 mm.

The preparation method of the recycled aggregate block has the beneficial effects that the preparation method is low in manufacturing cost, the recycled aggregate is used for replacing limestone aggregate in pervious concrete, the recycled concrete block brick is crushed and screened out to be a proper size, and the pervious concrete meeting engineering requirements is prepared through a process method, so that various problems brought to the environment and resources by the rapid increase of construction waste in the prior art can be solved, the concrete block brick material can be recycled, waste is changed into wealth, and the pervious pavement meeting the actual requirements is prepared.

Detailed Description

A preparation method of a recycled aggregate block comprises the following steps: s1: selecting raw materials: cement, fly ash, recycled aggregate, lignosulfonate, sodium hydroxide, straws, cellulose ether, a polycarboxylic acid high-efficiency water reducing agent and a sodium oxide solution; s2: the raw materials are proportioned as follows: 50-60% of cement, 10-15% of fly ash, 20-30% of recycled aggregate, 2-4% of lignosulfonate, 1-2% of sodium hydroxide, 5-8% of straw, 1-2% of cellulose ether and 2-3% of polycarboxylic acid high-efficiency water reducing agent; s3: mixing and stirring primary main materials: mixing the cement, the recycled aggregate and the fly ash according to the proportion in the step S2, and then adding water for mixing and stirring; s4: mixing and stirring auxiliary materials: mixing lignosulfonate, sodium hydroxide, straws, cellulose ether, a polycarboxylic acid high-efficiency water reducing agent and a sodium oxide solution according to the proportion in the step S2, and then adding water for mixing and stirring; s5: mixing and stirring: after the main material and the auxiliary material in the steps S3 and S4 are mixed and stirred, uniformly mixing and stirring the main material and the auxiliary material; s6: molding: pouring the mixture obtained in the step S5 into a mold, and continuously pressing for 6-9S under the pressure of 60-70kN by adopting a static pressure forming mode to prepare the recycled aggregate block.