Concrete and preparation technology thereof

A technology for concrete and recycled aggregates, applied in sustainable waste treatment, solid waste management, climate sustainability, etc. Increase in properties, improve durability, and improve the effect of large porosity

Inactive Publication Date: 2019-06-25
咸阳天力商品混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is urgent to develop a concrete that can improve the dry shrinkage and creep of concrete caused by the characteristics of recycled aggregates.

Method used

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  • Concrete and preparation technology thereof
  • Concrete and preparation technology thereof
  • Concrete and preparation technology thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0045] Modification steps of modified recycled aggregate: S1. Pre-soaking recycled aggregate: soak 1000kg recycled aggregate with 1% acetic acid for 2 hours to obtain the first product;

[0046] S2. After washing the first product with water, add it to the slurry prepared by 127kg of water, 6kg of calcium sulfoaluminate, 254kg of cement, 32kg of fly ash and 32kg of straw powder and wrap it into a second product with a thickness of 1-2mm. After the product is coagulated, a modified recycled aggregate is obtained.

preparation example 2

[0048] Modification steps of modified recycled aggregate: S1. Pre-soaking recycled aggregate: soak 1000kg recycled aggregate with 2% acetic acid for 1.8h to obtain the first product;

[0049] S2. After washing the first product with water, add it to the slurry prepared by 127 kg of water, 6 kg of calcium sulfoaluminate, 190 kg of cement, 63 kg of fly ash and 63 kg of straw powder and wrap it into a second product with a thickness of 1-2 mm. After the product is coagulated, a modified recycled aggregate is obtained.

preparation example 3

[0051] Modification steps of modified recycled aggregate: S1. Pre-soaking recycled aggregate: soak 1000kg recycled aggregate with 2% acetic acid for 1.5h to obtain the first product;

[0052] S2. After washing the first product with water, add it to the slurry prepared by 125 kg of water, 13 kg of calcium sulfoaluminate, 125 kg of cement, 94 kg of fly ash and 94 kg of straw powder and wrap it into a second product with a thickness of 1-2mm. After the product is coagulated, a modified recycled aggregate is obtained.

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Abstract

The invention relates to a concrete and a preparation technology thereof. The concrete comprises water, cement, fly ash, mineral powder, straw powder, machine-made sands, natural sands, broken stones,modified recycled aggregates and an additive. An aggregate modification process comprises the following steps: S1, the recycled aggregates are infiltrated with 1-3% acetic acid for 1-2 h to obtain afirst product; and S2, the first product is washed with water, then is added to a slurry prepared from water, calcium sulphoaluminate, cement, fly ash and straw powder, and is wrapped to form a secondproduct with a thickness of 1-2 mm, and the second product is coagulated to obtain the modified recycled aggregates. The preparation technology of the concrete comprises the following steps: 1, adding the cement, fly ash, mineral powder and straw powder to water, and performing uniform stirring to obtain a first mixture; and 2, adding the machine-made sands, natural sands, broken stones, modifiedrecycled aggregates, the additive and the remaining water to the first mixture, and performing uniform stirring to obtain the concrete. The recycled aggregates are used after being modified, so the problem of increase in the dry shrinkage rate and the creep property of the concrete, caused by the self characteristics of the recycled aggregates, is improved.

Description

technical field [0001] The invention relates to the technical field of concrete preparation, in particular to a concrete and a preparation process thereof. Background technique [0002] The high output of concrete has led to an increasing demand for sand and gravel. A large number of mountain quarrying and excavation of pottery sand have seriously damaged the ecological environment. In some areas, the high-quality natural aggregates have been exhausted, and long-distance transportation from other places is required, which increases the cost of construction products. At the same time, the discharge of waste concrete is increasing day by day, such a large amount of waste concrete not only takes up valuable land but also has caused environmental and social problems. Recycling and recycling a large amount of waste concrete, that is, recycled concrete technology, is generally considered to be the most effective measure to solve waste concrete. [0003] Recycled concrete is to b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B20/10C04B111/27C04B18/16
CPCY02W30/91
Inventor 敬西峰
Owner 咸阳天力商品混凝土有限公司
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