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Biomass aggregate recycled concrete and preparation method thereof

A technology of recycled concrete and biomass, which is applied in the field of building materials, can solve the problems of ecological building materials being blank, and achieve the effects of being beneficial to resource utilization, slowing down drying shrinkage and cracking, and alleviating environmental problems

Pending Publication Date: 2020-03-27
QINGDAO AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the application of biomass resources in the preparation of building products mostly focuses on the utilization of biological straw, while the research on the use of corncobs to prepare ecological building materials is almost blank.

Method used

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  • Biomass aggregate recycled concrete and preparation method thereof

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preparation example Construction

[0032] A kind of preparation method of the above-mentioned biomass aggregate recycled concrete of the present invention is a specific embodiment, and the preparation method comprises the following steps:

[0033] (1) Weigh cement, corncob particles, recycled fine aggregate and water according to the ratio of raw materials for use;

[0034] (2) Mix cement and recycled fine aggregate for 1-1.5 minutes, then add water and continue stirring for 2-3 minutes to obtain a uniform mixture;

[0035] (3) Add corn cob particles into the mixture obtained in step (2), and use the method of compacting while stirring to make the concrete mixture uniform;

[0036] (4) Put the concrete mixture obtained in step (3) into the mold, vibrate lightly on the shaking table for 10-15s, and cure at room temperature for the required number of days.

[0037] Further, the cement includes ordinary Portland cement and rapid-hardening sulfoaluminate cement. The ordinary Portland cement and rapid-hardening sul...

Embodiment 1

[0042] A kind of corn cob aggregate recycled concrete, the ratio of parts by weight of each raw material is as follows: 10 parts of Portland composite cement, 30 parts of recycled sand, 1.3 parts of corn cob particles, and 8.8 parts of water; wherein, the silicate composite The cement includes the following raw materials in parts by weight: 9 parts of ordinary Portland cement, 1 part of rapid-hardening sulphoaluminate cement; the corncob particle aggregate in the corncob particle aggregate recycled concrete has a volume ratio of 35%. Prepared by the following steps:

[0043] Mix ordinary Portland cement and rapid-hardening sulfoaluminate cement uniformly to form the first mixture; mix the first mixture with recycled sand and stir for 1 minute to obtain the second mixture; add water to the second mixture and continue stirring for 2.5 minutes to obtain a uniform Mixing material: Add corn cob particles with a particle size of 2-10mm into the mixing material, and use the method of...

Embodiment 2

[0045]A corncob aggregate recycled concrete, the difference from Example 1 is that the weight parts of corncob particles are 2 parts, water 13.2 parts; the corncob particle aggregate volume ratio in the corncob aggregate recycled concrete is 40%.

[0046] The preparation method of Example 2 is basically the same as that of Example 1.

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Abstract

The invention provides biomass aggregate recycled concrete and a preparation method thereof, and the biomass aggregate recycled concrete is characterized by comprising cement, broken corncob particlesand a recycled fine aggregate and comprising the components in parts by weight: 8-10 parts of the cement, 1-4 parts of corncob particles, 20-40 parts of the recycled fine aggregate and 8-20 parts ofwater. The volume rate of the corncob particle aggregate in the biomass aggregate recycled concrete is 30%-50%, and the particle size of the corncob particles is 2-10 mm. The preparation method comprises the steps: weighing the cement, the corncob particles, the recycled fine aggregate and the water according to the raw material ratio for later use; uniformly mixing the cement with the recycled fine aggregate, adding water, and stirring to obtain a uniform mixture; adding the corncob particles into the mixture, then compacting while stirring, and making the concrete mixture uniformly; and putting the concrete mixture into a mold, slightly vibrating by a vibrating table, and maintaining at normal temperature for a required number of days. A novel green building material and products thereofare developed by corncobs and construction wastes, and the novel green building material is rich in raw materials, low in cost and suitable for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a biomass aggregate recycled concrete and a preparation method thereof. Background technique [0002] As the food crop with the highest total output in my country, corn has an annual output of 257 million tons, but at the same time it produces about 46 million tons of corncobs. At present, the utilization rate of corncobs is low, and most of the corncobs are still stacked or burned on the spot. It not only wastes resources, but also causes serious pollution to the environment; on the other hand, corncobs have good thermal insulation and sound absorption, light weight, moderate hardness and other building performances, and can be used as biomass resources to develop green building materials to replace traditional building materials to alleviate rural areas. The status quo of high pollution and high energy consumption in construction. [0003] In the process of urbanizati...

Claims

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Application Information

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IPC IPC(8): C04B28/06
CPCC04B28/06C04B2111/00017C04B2201/20C04B2201/32C04B2201/50C04B7/02C04B14/06C04B18/248
Inventor 刘娟李秋义孟丹张坤冀晓珊何嘉乐
Owner QINGDAO AGRI UNIV
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