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Construction waste recycled high-active mineral admixture and preparation method thereof

A technology for mineral admixture and construction waste, which is applied in the field of construction waste regeneration and high-activity mineral admixture and its preparation, can solve the problems of difficulty in meeting the needs of large-scale use in the market, poor economy, and high cost, and meet the large-scale demand in the market. , the effect of reducing production costs and solving disposal problems

Inactive Publication Date: 2019-08-30
滁州市炬基节能新型建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, silica fume has many defects as an active admixture, mainly including: 1) The source of silica fume is single, resources are limited, and it is difficult to meet the large-scale use demand of the market; 2) The cost of silica fume is relatively high, and the market price is about 2000-3000 yuan / ton , less economical

Method used

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  • Construction waste recycled high-active mineral admixture and preparation method thereof
  • Construction waste recycled high-active mineral admixture and preparation method thereof
  • Construction waste recycled high-active mineral admixture and preparation method thereof

Examples

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preparation example Construction

[0019] A method for preparing a recycled high-activity mineral admixture from construction waste, the method comprising the following steps:

[0020] Step 1: Treatment of recycled aggregates: crush waste concrete components after removing impurities such as plastics, paper and wood chips, and then sieve them with square-hole gravel sieves of 9.50mm, 16.0mm and 19.00mm respectively to obtain 9.5-19mm Continuously graded recycled aggregate;

[0021] Step 2: Treatment of rice husk ash: the rice husk low-temperature ash furnace burns off the organic matter, and the rice husk ash obtained at an incineration temperature below 800 degrees Celsius still has a high pozzolanic activity, leaving inorganic matter such as silica ash, etc. Grinding and sieving to obtain rice husk ash;

[0022] Step 3: Add fine aggregate, recycled aggregate in step 1, cement and rice husk ash in step 2 to cement and 60% water by weight of rice husk ash in step 2 and stir to obtain highly active mineral admi...

Embodiment 1

[0024] A regenerated high-activity mineral admixture for construction waste, the regenerated high-activity mineral admixture for construction waste is made of the following raw materials in parts by weight: cement: 80 parts; fine aggregate: 160 parts; recycled aggregate: 360 parts; rice husk ash: 20 parts.

[0025] A method for preparing a recycled high-activity mineral admixture from construction waste, the method comprising the following steps:

[0026] Step 1: Treatment of recycled aggregates: crush waste concrete components after removing impurities such as plastics, paper and wood chips, and then sieve them with square-hole gravel sieves of 9.50mm, 16.0mm and 19.00mm respectively to obtain 9.5-19mm Continuously graded recycled aggregate;

[0027] Step 2: Treatment of rice husk ash: the rice husk low-temperature ash furnace burns off the organic matter, and the rice husk ash obtained at an incineration temperature below 800 degrees Celsius still has a high pozzolanic acti...

Embodiment 2

[0032] A regenerated high-activity mineral admixture for construction waste, the regenerated high-activity mineral admixture for construction waste is made of the following raw materials in parts by weight: cement: 85 parts; fine aggregate: 170 parts; recycled aggregate: 340 parts; rice husk ash: 15 parts.

[0033] A method for preparing a recycled high-activity mineral admixture from construction waste, the method comprising the following steps:

[0034] Step 1: Treatment of recycled aggregates: crush waste concrete components after removing impurities such as plastics, paper and wood chips, and then sieve them with square-hole gravel sieves of 9.50mm, 16.0mm and 19.00mm respectively to obtain 9.5-19mm Continuously graded recycled aggregate;

[0035] Step 2: Treatment of rice husk ash: the rice husk low-temperature ash furnace burns off the organic matter, and the rice husk ash obtained at an incineration temperature below 800 degrees Celsius still has a high pozzolanic acti...

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Abstract

The invention discloses a construction waste recycled high-active mineral admixture in the technical field. The construction waste recycled high-active mineral admixture is prepared from the followingraw materials by weight parts: 80-90 parts of cement; 160-180 parts of fine aggregate; 320-360 parts of recycled aggregate; 10-20 parts of rice husk ash, The invention adopts rice husk ash ground atlow temperature, and the rice husk ash at low temperature contains high content of silicon dioxide, so that the concrete is prepared by replacing the silicon ash with the rice husk ash at low temperature, which can effectively meet the large-scale market demand, effectively reduce the production cost, adopt recycled aggregate, and solve the problems of mining primary aggregate and disposing construction waste.

Description

technical field [0001] The invention discloses a regenerated high-activity mineral admixture from construction waste and its preparation, specifically in the technical field of building materials. Background technique [0002] In order to improve the strength and durability of concrete during construction, some ultrafine mineral admixtures are usually added to cement or concrete. At present, silica fume is the most effective and widely used. However, silica fume has many defects as an active admixture, mainly including: 1) The source of silica fume is single, and resources are limited, which makes it difficult to meet the large-scale use of the market; 2) The cost of silica fume is relatively high, and the market price is about 2000-3000 yuan / ton , poor economy. [0003] With the acceleration of urbanization in China, the construction waste generated in the process of urban renewal, renovation, maintenance and demolition is increasing day by day. These construction wastes ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/02C04B18/16C04B18/10
CPCC04B18/021C04B14/06C04B18/16C04B18/101Y02W30/91
Inventor 詹宁王磊
Owner 滁州市炬基节能新型建材有限公司