Waste combined micro powder regenerated ultrahigh-toughness mixture and preparation method thereof
A technology of ultra-high toughness and mixed materials, which can be applied in the direction of solid waste management, climate sustainability, and sustainable waste treatment. It can solve the problems of less research, limited application of cement-based materials, and high prices of cement and quartz sand. The effect of reducing energy consumption intensity, realizing reuse, and reducing production costs
Active Publication Date: 2022-08-02
ZHENGZHOU UNIV
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Problems solved by technology
[0005]
Although there are many relevant studies on building recycled micropowder and ECC materials in the prior art, there are still defects and deficiencies: (1) in the prior art, there are many studies on the preparation of building recycled micropowder into coarse aggregate and application in concrete. Less research on ECC materials
(2) The existing replacement of raw materials in ECC materials with recycled micropowder is mostly a single substitution, that is, one kind of construction micropowder is used to replace one raw material in the original mix ratio, and multiple types of micropowder are not used to replace multiple raw materials.
(3) The cement and quartz sand in ECC materials are expensive, which limits the application of cement-based materials in engineering
Method used
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Embodiment 1
[0059] Preparation of test pieces:
[0060] Prepare the raw materials for preparing the ECC test piece (benchmark group) and the waste composite micropowder regenerated ultra-high toughness mixture test piece (regenerated micropowder group) according to the proportions in Table 1;
[0061] Table 1 Mixing ratio of ECC and waste combined micropowder recycled ultra-high toughness mixture (kg / m 3 )
[0062]
[0063] Specimens were prepared using a B20 strong mixer:
[0064] (1) First, wet the mixing bucket and the mixing blade with a towel to ensure that there is no water in the bucket and the wall of the bucket is wet;
[0065] (2) Add cement (cement and recycled glass powder), fly ash and quartz sand (recycled brick powder and recycled concrete powder) into the mixing tank in turn, and stir at low speed (108r / min) for 3 minutes to ensure that the materials are mixed evenly;
[0066] (3) slowly pour the water into the mixing bucket, then add the water reducing agent and the...
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Abstract
The invention discloses a waste combined micro powder regenerated ultrahigh-toughness mixture and a preparation method thereof, and belongs to the technical field of building solid waste recycling. Each cubic meter of the waste combined micro powder regenerated ultrahigh-toughness mixture is prepared from the following raw materials: 360 to 390 kg of water, 230 to 265 kg of cement, 90 to 120 kg of regenerated glass powder, 870 to 920 kg of fly ash, 160 to 200 kg of regenerated brick powder, 160 to 200 kg of regenerated concrete powder, 19.4 kg of PE (Poly Ethylene) fiber, 0.9 to 1.3 kg of a water reducing agent and 0.3 to 0.4 kg of a thickening agent. According to the invention, the recycled combined micro-powder is used for replacing a cementing material and fine aggregate in the ECC raw material, so that the resource utilization of the building waste is realized, the ECC production cost is greatly reduced, and meanwhile, the prepared waste combined micro-powder recycled ultrahigh-toughness mixture is high in strength and strong in toughness.
Description
technical field [0001] The invention relates to the technical field of construction solid waste recycling, in particular to a waste composite micropowder regenerated ultra-high toughness mixture and a preparation method thereof. Background technique [0002] In recent years, with the continuous acceleration of urbanization, a large amount of construction waste is generated every year, and it continues to grow at an alarming rate. However, the recycling rate of construction waste is very low, and a large amount of construction waste is sent to the suburbs for stacking and landfill, which not only occupies a large area, but also causes environmental pollution. In today's society, sustainable development and green ecological environmental protection have attracted more and more attention. With the continuous generation of construction waste, it is imminent to adopt advanced technologies and technological measures to promote the reduction of construction waste at the source and ...
Claims
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IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B2111/00017C04B14/22C04B18/08C04B18/167C04B16/0625C04B24/383C04B2103/302Y02W30/91
Inventor 程站起闫文豪李浩楠郜成聪张文更王开闯刘人龙王珮莹张惜洪王世可
Owner ZHENGZHOU UNIV