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Recycled concrete and preparation method thereof

A technology of recycled concrete and recycled coarse aggregate, which is applied in the field of concrete, can solve the problems of concrete compressive strength decline, uneven stress of recycled concrete, etc., and achieve the effects of reducing cracks, improving self-compacting, and combining tightly

Pending Publication Date: 2021-03-16
中意世兴实业(武汉)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned related technologies, the inventor believes that there are the following defects: in the related technologies, recycled coarse aggregate and recycled fine aggregate are used to prepare recycled concrete, but during the crushing process of recycled aggregate, due to external force, the recycled aggregate internal a large number of microcracks
In the case that the recycled aggregate contains micro-cracks and the recycled aggregate has a large porosity, when the recycled concrete is subjected to temperature stress after solidification, the internal force of the recycled concrete will be uneven, and expansion cracks will be generated on the concrete, resulting in concrete failure. Decrease in compressive strength

Method used

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  • Recycled concrete and preparation method thereof
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Embodiment 1

[0046] The embodiment of the present application discloses a recycled concrete. The components included and the amounts of the corresponding components are shown in Table 1, and are prepared through the following steps:

[0047] S1. Soak the ceramsite in clear water at normal temperature for 15 hours, and remove the pretreated ceramsite, wherein the particle size of the ceramsite is 20-25mm;

[0048] S2. Uniformly mixing the recycled coarse aggregate and the pretreated ceramsite to obtain the first component, wherein the recycled coarse aggregate is a continuous particle size recycled coarse aggregate with a particle size of 10-18mm;

[0049] S3. Vacuum mixing the recycled fine aggregate, admixture, first component, reinforcing fiber and water to obtain a second component, wherein the admixture is silica fume, and the reinforcing fiber is steel fiber;

[0050] S4. First add the early strength agent to the second component and stir evenly, then add the composite water reducer ...

Embodiment 2

[0052] The embodiment of the present application discloses a recycled concrete. The components included and the parts by weight of the corresponding components are shown in Table 1, and are prepared through the following steps:

[0053] S1. Soak the ceramsite in clear water at normal temperature for 24 hours, and remove the pretreated ceramsite, wherein the particle size of the ceramsite is 3-4mm;

[0054] S2. Uniformly mixing the recycled coarse aggregate and the pretreated ceramsite to obtain the first component, wherein the recycled coarse aggregate is a continuous particle size recycled coarse aggregate with a particle size of 10-18mm;

[0055] S3. Mix the recycled fine aggregate, admixture, first component, reinforcing fiber and water evenly under vacuum to obtain the second component, wherein the admixture is zeolite powder and pulverized coal with a weight ratio of 4:1 Grey, steel fiber is selected as the reinforcing fiber;

[0056] S4. First add the early strength ag...

Embodiment 3

[0058] The embodiment of the present application discloses a recycled concrete. The components included and the parts by weight of the corresponding components are shown in Table 1, and are prepared through the following steps:

[0059] S1. Soak the ceramsite in clear water at normal temperature for 28 hours, and remove the pretreated ceramsite, wherein the particle size of the ceramsite is 20-25mm;

[0060] S2. Uniformly mixing the recycled coarse aggregate and the pretreated ceramsite to obtain the first component, wherein the recycled coarse aggregate is a continuous particle size recycled coarse aggregate with a particle size of 10-18mm;

[0061] S3. Mix the recycled fine aggregate, admixture, first component, reinforcing fiber and water evenly under vacuum to obtain the second component, wherein the admixture is zeolite powder and pulverized coal with a weight ratio of 4:1 Grey, steel fiber is selected as the reinforcing fiber;

[0062] S4. First add the early strength ...

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Abstract

The invention relates to recycled concrete and a preparation method thereof, and relates to the field of concrete, the recycled concrete comprises the following components by weight: 212-330 parts ofcement; 835-984 parts of recycled coarse aggregate; 350-426 parts of recycled fine aggregate; 94-127 parts of water; 55-80 parts of an admixture; 22-35 parts of ceramsite; 1-2 parts of an early strength agent; 15-28 parts of reinforcing fibers; and 1.5-2 parts of a composite water reducing agent. The recycled concrete has the effect of improving the compressive strength of the recycled concrete.

Description

technical field [0001] The present application relates to the field of concrete, in particular to a recycled concrete and a preparation method thereof. Background technique [0002] Our country is in the white-hot period of economic development, followed by vigorous development of urban and rural construction. With the development of urban construction, a large number of existing buildings have been demolished, and the resulting construction waste has caused huge pressure on the environment; on the other hand, the demand for sand and gravel aggregates is increasing due to large-scale construction projects. Due to a large amount of mining, it has caused great damage to the natural environment, and natural resources are gradually becoming exhausted. In this regard, recycled concrete came into being. Recycled concrete is concrete prepared by replacing or partially replacing natural aggregates with recycled aggregates. Among them, recycled aggregate is the aggregate formed by...

Claims

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Application Information

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IPC IPC(8): C04B28/02
CPCC04B28/02C04B2201/50C04B18/16C04B18/146C04B14/48C04B24/122C04B24/18C04B24/20C04B18/027C04B14/047C04B24/22
Inventor 殷勇廖宇恒肖宇
Owner 中意世兴实业(武汉)有限公司